Photocatalytic Activity

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1 - Synthesis of Cu-TiO2Nanocomposite and Investigation of the Effectiveness of PEG, Pectin, and CMCas Additives
B. Khodadadi M. Sabeti S. Moradi P. Aberomand Azar S. Raeis Farshid

Recently, TiO2 has been widely used as a photocatalyst for degradation of environmental pollutants. In the present study, the advantage of metal doping onto TiO2 for enhanced photocatalitic activity has been investigated. Copper-Titanium dioxide nanocomposites were prep چکیده کامل

Recently, TiO2 has been widely used as a photocatalyst for degradation of environmental pollutants. In the present study, the advantage of metal doping onto TiO2 for enhanced photocatalitic activity has been investigated. Copper-Titanium dioxide nanocomposites were prepared by the sol-gel method in the presence of Carboxy Methyl Cellulose (CMC), Pectin, and Poly Ethylene Glycol (PEG) as additives. The structures and properties of prepared samples were identified by IR spectra, Scanning Electron Microscopy (SEM), and X-Ray Diffraction (XRD) methods. Furthermore, the photocatalytic activity under UV-irradiation to remove organic pollutant was investigated. The results have revealed that the photocatalytic activity of the nanocomposite in presence of additives increased. SEM pictures have shown that the particle size of Cu-TiO2 powder with additives was smaller than other samples without any additive. پرونده مقاله

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2 - Preparation, Characterization and Photocatalytic Activity of Ag-Cd-ZnO and Ag-Cu-ZnO Nanostructures
Bahar Khodadadi Maryam Bordbar Maryam Sajedi

In this study, ZnO nanopowders and ZnO doped with metals (Cu , Ag- doped ZnO) and (Cd, Ag- doped ZnO) were synthesized by the sol-gel method in order to investigation on the codoping effect on the band gap and photocatalytic activity of ZnO. The synthesized samples are چکیده کامل

In this study, ZnO nanopowders and ZnO doped with metals (Cu , Ag- doped ZnO) and (Cd, Ag- doped ZnO) were synthesized by the sol-gel method in order to investigation on the codoping effect on the band gap and photocatalytic activity of ZnO. The synthesized samples are characterized by IR spectroscopy technique. Moreover, the absorption coefficients of the ZnO, Ag-Cd-ZnO and Ag-Cu-ZnO were analyzed by Tauc’s approach and the direct band gap is calculated. According to these results, compared with pure ZnO, the band gap of the Ag-Cd-ZnO and Ag-Cu-ZnO decreases and it is dependent on the content of dopands. Furthermore, photocatalytic activity for all samples was investigated under UV irradiation in an aqueous medium. The results have been revealed that Ag-Cd-ZnO and Ag-Cu-ZnO shown more photocatalytic actitivity in comparison with pure ZnO. پرونده مقاله

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3 - The Influence of Ag Doping on Structural, Optical Properties and Photocatalytic Activity of TiO2/SiO2 Nanocomposite
Bahar Khodadadi

In the present study, TiO 2 /SiO 2 and TiO 2 /SiO 2 /Ag nanocomposite powders were synthesized by sol-gel technique. Moreover, for investigation of the Ag doping effect different concentrations of dopant were added. Structures were characterized by IR spectros چکیده کامل

In the present study, TiO 2 /SiO 2 and TiO 2 /SiO 2 /Ag nanocomposite powders were synthesized by sol-gel technique. Moreover, for investigation of the Ag doping effect different concentrations of dopant were added. Structures were characterized by IR spectroscopy, Scanning Electron Microscopy (SEM), Energy Dispersive Analytical X-Ray (EDAX), and X-Ray Diffraction (XRD) methods. Furthermore, the absorption coefficients of the samples were analyzed by Tauc’s model and the direct band gaps were calculated. Photocatalytic activity of all samples was investigated under UV irradiation in an aqueous medium. The results were shown that photocatalytic activity improves in the presence of appropriate amount of Ag as dopant. پرونده مقاله

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4 - Photocatalytic Degradation of Phenol in Water Solution by Phosphotungstic Acid on TiO2/ZnO Nanoparticles as supporting solid
Marzieh Nasiriyan معصومه طباطبایی Seyed Abolghasem Mirhoseini

In this research, a Keggin-type heteropolyoxometalate (H3PWO12O40) supported on TiO2/ZnO nanoparticles were used for degradation of phenol under UV light and H2O2 was used as oxidant. Based on the results, heterogenization of H3PWO12O40 on TiO2/ZnO could be improved pho چکیده کامل

In this research, a Keggin-type heteropolyoxometalate (H3PWO12O40) supported on TiO2/ZnO nanoparticles were used for degradation of phenol under UV light and H2O2 was used as oxidant. Based on the results, heterogenization of H3PWO12O40 on TiO2/ZnO could be improved photocatalytic process and could be considered an appropriate heterogonous photocatalyst in the removing of phenol from aqueous solutions in the presence of hydrogen peroxide. Degradation of phenol in the presence of the H3PWO12O40/ZnO could lead to the disappearance of approximately 95% of phenol under UV irradiation and optimized condition. In the same experiment H3PWO12O40 as homogenous catalyst, removed 70% phenol and heterogenous TiO2/ZnO catalyst removed less than 70% phenol from water solution in the same condition. پرونده مقاله

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5 - Investigating structural, optical and photocatalytic properties of hydrothermally synthesized ZnO nanorod arrays with various aspect ratios
Saeed Safa Ali Khayatian eliza rokhsat Mehrdad Najafi

ZnO nanorods with various aspect ratios (by changing the time of growth between 0-240 min) were synthesized using hydrothermal method and were investigated using XRD, SEM, UV–Vis and PL. It was found that growth time is directly coupled with the length, orientatio چکیده کامل

ZnO nanorods with various aspect ratios (by changing the time of growth between 0-240 min) were synthesized using hydrothermal method and were investigated using XRD, SEM, UV–Vis and PL. It was found that growth time is directly coupled with the length, orientation and aspect ratio of the nanorod arrays. The optical transmittance of the NR arrays indicated a regular decrement of average transmittance with increasing the aspect ratio of NRs in the visible range. The optical constants (absorption coefficient, extinction coefficient and refractive index) can be account as a function of refractive index were determined. The porous ZnO nanorod with the thickness of &sim; 1560 nm and texture coefficient of 0.96 for (002) plane exhibits the average visible transmittance <60%, refractive index 1.34, packing density 0.26 and lowest optical band gap, was fabricated in the longest time of hydrothermal growth (240 min). As the growth time was increased, the photoluminescence properties was sustained a general weakening tendency and a red-shift of UV-emission peak position. The UV-assisted photocatalytic degradation of 4-Nitrophenol (4-NP) of ZnO NRs were investigated. The considerable photocatalytic performance of ZnO NRs with highest aspect ratio was explained by its porosity and optical characteristics. پرونده مقاله

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6 - Polymer-Assisted Synthesis and Characterization of Nickel Aluminate Nanoparticles for Photodegradation of Methylene Blue
Sogol Bakhtiarvand Seyed Ali Hassanzadeh Tabrizi

A simple polymer-assisted wet chemical method was used to synthesize NiAl2O4 nanopowder. The photocatalytic properties of synthesized powders were investigated for the degradation of methylene blue. For this aim, metal salts and polymeric precursors were dissolved in wa چکیده کامل

A simple polymer-assisted wet chemical method was used to synthesize NiAl2O4 nanopowder. The photocatalytic properties of synthesized powders were investigated for the degradation of methylene blue. For this aim, metal salts and polymeric precursors were dissolved in water, and then a crosslinker was added till a gel was formed. The product was calcined to produce nanopowders. XRD results confirmed the formation of nickel aluminate with spinel structure. In addition, the findings showed that the produced NiAl2O4 nanopowders have a particle size range between 35 to 100 nm with a uniform particle size distribution. The optical properties of the samples showed that the bandgap energy of NiAl2O4 is about 3.44 eV. The nickel aluminate nanopowders demonstrated high photocatalytic activity for photodegradation of methylene blue, which could be attributed to their small particle sizes. It seems that the polymer-assisted wet chemical synthesis may open up an effective route for the production of ceramic photocatalyst nanopowders with high quality. پرونده مقاله

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7 - Improving photocatalytic properties of Zn0.95Ni0.04Co0.01O modified by PANI
sara poorarjmand Maryam Kargar Razi Ali Mahjoob Morteza khosravi

10.22034/jna.2019.583514.1131

In this research, preparation of Zn0.95Ni0.04Co0.01O/PANI (polyaniline) (0.5%, 1% and 1.5% PANI) nano composites was performed by synthesis of pure polyaniline and adsorption of resulted organic chains on the structure of Zn0.95Ni0.04Co0.01O nano particles. The as-prepa چکیده کامل

In this research, preparation of Zn0.95Ni0.04Co0.01O/PANI (polyaniline) (0.5%, 1% and 1.5% PANI) nano composites was performed by synthesis of pure polyaniline and adsorption of resulted organic chains on the structure of Zn0.95Ni0.04Co0.01O nano particles. The as-prepared samples was characterized by X-ray diffraction (XRD), fourier transform infrared (FTIR), field emission scanning electron microscopy (FESEM) and BET techniques. According to the X-ray diffraction analysis, pure PANI has semi crystalline structure while all of the composites showed the characteristic peaks of Zn0.95Ni0.04Co0.01O with hexagonal wurtzite structure. The FTIR spectroscopy approved the interactions of PANI chains and Zn0.95Ni0.04Co0.01O nano particles. Field emission scanning electron microscopy analysis revealed amorphous structure of PANI and the spherical shape of nano composite. The BET analysis attributed the largest specific surface area of Zn0.95Ni0.04Co0.01O/PANI (1% PANI) nano composite. The photocatalytic results showed that the dye can be effectively decolorized by Zn0.95Ni0.04Co0.01O/PANI (1% PANI) nano composite. The enhancement of photocatalytic performance is due to the decrease of specific surface area and the high separation efficiency of photo-induced electron-hole pairs. پرونده مقاله

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8 - Synthesis, characterization and photocatalytic activity of nanoZnO and Ni-Co-ZnO nanocomposites
Sara Poorarjmand Maryam Kargar Razi Ali Reza Mahjoub Morteza Khosravi

10.22034/jna.2018.563722.1080

Photocatalysis has attracted significant attention as a potential issue for degradation of toxic organic pollutants such as Congo Red. In this research spherical Pure ZnO nano particles and Ni-Co-ZnO nano composites (Zn0.95Ni0.04Co0.01O, Zn0.95Ni0.025Co0.025O and Zn0. چکیده کامل

Photocatalysis has attracted significant attention as a potential issue for degradation of toxic organic pollutants such as Congo Red. In this research spherical Pure ZnO nano particles and Ni-Co-ZnO nano composites (Zn0.95Ni0.04Co0.01O, Zn0.95Ni0.025Co0.025O and Zn0.95Ni0.01Co0.04O) have been synthesized by precipitation method. X- ray diffraction, Fourier transform Infra Red ,field emission scanning electron microscopy, EDX and ICP analysis confirmed the structure and composition of samples. The x-ray diffraction analysis (XRD) showed that all samples prepared were of Wurtzite structure and average crystal size of 17nm. Field emission scanning electron microscopy (FESEM) analysis revealed the spherical shape of all samples. The Fourier transform infrared spectroscopy (FT-IR) revealed bands at 435 cm-1, 480 cm-1 and 525 cm-1 are related to Zn-O bonds , related to the stretching vibrating bonds of ZnO. The results illustrated the Ni and Co ions substituted the Zn ions in ZnO crystal lattice successfully. The results showed that some of doped Ni-Co ZnO exhibit enhanced photocatalytic activity , as compared to pure ZnO. Kinetic of de-colorization process for all photo-catalysts followed psedu first order. In degradation process The best photocatlyst was (Zn0.95Ni0.04Co0.01O). پرونده مقاله

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9 - Photocatalytic degradation of Congo Red dye by using nano ZnO and Ni-Co-ZnO nanocomposites
Sara Poorarjmand Maryam Kargar Razi Ali Reza Mahjoob Morteza Khosravi

10.22034/jna.2018.541866

Photocatalysis has attracted significant attention as a potential issue for the degradation of toxic organic pollutants such as Congo Red. In this research spherical Pure ZnO nano particles and Ni-Co-ZnO nano composites (Zn0.95Ni0.04Co0.01O, Zn0.95Ni0.025Co0.025O and Zn چکیده کامل

Photocatalysis has attracted significant attention as a potential issue for the degradation of toxic organic pollutants such as Congo Red. In this research spherical Pure ZnO nano particles and Ni-Co-ZnO nano composites (Zn0.95Ni0.04Co0.01O, Zn0.95Ni0.025Co0.025O and Zn0.95Ni0.01Co0.04O) have been synthesized by precipitation method. X- ray diffraction, Fourier transform Infra Red ,field emission scanning electron microscopy, EDX and ICP analysis confirmed the structure and composition of the samples. The x-ray diffraction analysis (XRD) showed that all samples prepared were about Wurtzite structure and average crystal size of 17nm. Field emission scanning electron microscopy (FESEM) analysis revealed the spherical shape of all samples. The Fourier transform infrared spectroscopy (FT-IR) revealed bands at 435 cm-1, 480 cm-1 and 525 cm-1 are related to Zn-O bonds, related to the stretching vibrating bonds of ZnO. The results illustrated the Ni and Co ions substituted the Zn ions in ZnO crystal lattice successfully. The results showed that some of doped Ni-Co ZnO exhibit enhanced photocatalytic activity , as compared to pure ZnO. Kinetic of de-colorization process for all photo-catalysts followed psedu first order. In degradation process The best photocatlyst was (Zn0.95Ni0.04Co0.01O). پرونده مقاله

دسترسی آزاد مقاله

10 - Improving photocatalytic properties of Zn0.95Ni0.04Co0.01O modified by PANI
Sara Poorarjmand Maryam Kargar Razi Ali Reza Mahjoub Morteza Khosravi

10.22034/jna.2019.667136

In this research, preparation of Zn0.95Ni0.04Co0.01O/PANI (polyaniline) (0.5%, 1% and 1.5% PANI) nano composites was performed by synthesis of pure polyaniline and adsorption of resulted organic chains on the structure of Zn0.95Ni0.04Co0.01O nano particles. The as-prepa چکیده کامل

In this research, preparation of Zn0.95Ni0.04Co0.01O/PANI (polyaniline) (0.5%, 1% and 1.5% PANI) nano composites was performed by synthesis of pure polyaniline and adsorption of resulted organic chains on the structure of Zn0.95Ni0.04Co0.01O nano particles. The as-prepared samples was characterized by X-ray diffraction (XRD), fourier transform infrared (FTIR), field emission scanning electron microscopy (FESEM) and BET techniques. According to the X-ray diffraction analysis, pure PANI has a semi crystalline structure while all of the composites showed the characteristic peaks of Zn0.95Ni0.04Co0.01O with hexagonal wurtzite structure. The FTIR spectroscopy approved the interactions of PANI chains and Zn0.95Ni0.04Co0.01O nano particles. Field emission scanning electron microscopy analysis revealed amorphous structure of PANI and the spherical shape of nano composite. The BET analysis attributed the largest specific surface area of Zn0.95Ni0.04Co0.01O/PANI (1% PANI) nano composite. The photocatalytic results showed that the dye can be effectively decolorized by Zn0.95Ni0.04Co0.01O/PANI (1% PANI) nano composite. The enhancement of photocatalytic performance is due to the decrease of specific surface area and the higher separation efficiency of photo-induced electron-hole pairs. پرونده مقاله

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11 - Enhanced photocatalytic activity of sonochemical derived ZnO via the co-doping process
Maryam Bordbar Solmaz Forghani-pilerood Ali Yeganeh-Faal

In the present study, Co-ZnO and Co-Ni-ZnO nanoparticles were synthesized by sonochemical methods and the structural and optical properties were investigated through Fourier Transform Infrared spectroscopy (FTIR), UV-Vis spectroscopy, Field Emission Scanning Electron Mi چکیده کامل

In the present study, Co-ZnO and Co-Ni-ZnO nanoparticles were synthesized by sonochemical methods and the structural and optical properties were investigated through Fourier Transform Infrared spectroscopy (FTIR), UV-Vis spectroscopy, Field Emission Scanning Electron Microscopy (FE-SEM), X-Ray Diffraction (XRD), and Photoluminescence spectroscopy (PL) methods. Morphology of nanoparticles obtained a small granular shape with an average crystallite size of 60 nm. In addition, the direct band gap was calculated using Tauc's approach. Comparing with pure ZnO, the band gap of the doped-ZnO NPs is smaller and depends on the type of dopants. Moreover, photocatalytic activity of all samples was investigated by the degradation of methyl orange (MO) dye under UV irradiation in an aqueous medium. Co-Ni-ZnO possesses excellent photocatalytic activity for the degradation of MO when compared to Co-ZnO and ZnO. In addition, the photocatalytic activity of Co-ZnO improves in the presence of nickel dopant. Moreover, the photocatalyst could be reused for four times without remarkable loss of its activity. پرونده مقاله

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12 - Effects of metal oxide catalysts on the photodegradation of antibiotics effluent
Chaimaa EL Bekkali Habiba Bouyarmane Said Laasri Abdelaziz Laghzizil Ahmed Saoiabi

The current study examined the effect of metal oxide catalysts on the sorption and photocatalytic efficiencies for the removal of ciprofloxacin and ofloxacin in water. ZnO and TiO2 catalysts are prepared using a suitable method based on the sol-gel process, which have a چکیده کامل

The current study examined the effect of metal oxide catalysts on the sorption and photocatalytic efficiencies for the removal of ciprofloxacin and ofloxacin in water. ZnO and TiO2 catalysts are prepared using a suitable method based on the sol-gel process, which have a great change in structural and textural properties. The structure and surface area of the synthesized catalysts were characterized, and used as sorbents/catalysts to remove antibiotics from water. Results showed a high adsorption capacity for the Titania oxide related to its great surface area, it is about 280 m2 g-1, compared to that of ZnO catalyst with only 19 m2 g-1. However, both photocatalysts exhibit a difference in photocatalytic activity versus both drugs. Therefore, ZnO, as a competitor catalyst for the TiO2, provides the most effective treatment of contaminated water with antibiotic pollutants to produce suitable reused water. پرونده مقاله

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13 - Incorporation of Pb2+, Fe2+ and Cd2+ ions in ZnO nanocatalyst for photocatalytic activity
Maryam Bordbar Zahra Sayban Ali Yeganeh-Faal Bahar Khodadadi

In the present study, Pb-ZnO, Fe-ZnO, Cd-ZnO and Pb-Fe-Cd-ZnO nanoparticles were synthesized by the sonochemical method and those structural and optical properties were investigated by Fourier Transform Infrared spectroscopy (FTIR), UV-Vis spectroscopy, Field Emission S چکیده کامل

In the present study, Pb-ZnO, Fe-ZnO, Cd-ZnO and Pb-Fe-Cd-ZnO nanoparticles were synthesized by the sonochemical method and those structural and optical properties were investigated by Fourier Transform Infrared spectroscopy (FTIR), UV-Vis spectroscopy, Field Emission Scanning Electron Microscopy (FE-SEM) and X-Ray Diffraction (XRD). Average crystallite size obtained was 60 nm. Moreover, the direct band gap has been calculated using Tauc's approach. Compared with pure ZnO, the band gap of the doped-ZnO NPs is smaller and it depends on the type of dopants. In addition, photocatalytic activity of all samples has been investigated by the degradation of congo red (CR) dye under UV irradiation in an aqueous medium. In the presence of ZnO NPs photocatalytic degradation of 35% was obtained for 180 min. But Pb-ZnO, Fe-ZnO, Cd-ZnO and Pb-Fe-Cd-ZnO have shown the degradation of 45, 57, 65 and 80% respectively; they have the faster decolorization as compared with the ZnO NPs. Moreover, the photocatalyst could be reused for five times without remarkable loss of its activity. پرونده مقاله

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14 - Cuprous oxide nanocubes functionalized with graphene quantum dots and its application for methylene blue degradation
Quyen Tran Dang Pham My Ngo Toan Pham Thien Doan Thanh Luong

10.30495/ijc.2022.689550

Cuprous oxide nanocubes (Cu2O NCBs) were successfully functionalized with graphene quantum dots (GQDs) to form GQDs/Cu2O NCBs composites material with highly plasmonic property and photocatalytic activity. Herein, GQDs were synthesized by a hydrothermal method at 190&de چکیده کامل

Cuprous oxide nanocubes (Cu2O NCBs) were successfully functionalized with graphene quantum dots (GQDs) to form GQDs/Cu2O NCBs composites material with highly plasmonic property and photocatalytic activity. Herein, GQDs were synthesized by a hydrothermal method at 190°C for 8 h using natural sources of wheat flour and ascorbic acid as precursors and reducing agents, respectively. Cu2O NCBs were prepared via a simple chemical reduction method at room temperature. GQDs/Cu2O NCBs composites were fabricated by the simple mixing of the two corresponding component dispersions. Characterized by ultraviolet-visible spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD),transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDX), the GQDs/Cu2O NCBs structures were confirmed. The composites possessed cubic shape of Cu2O and spherical shape of GQDs with average particle sizes respectively being ~70-80 nm, and ~3-8 nm; and an elemental composition of C (41.53%), O (47.03%), N (0.24%), and Cu (11.20%). Moreover, experiments on the methylene blue (MB) degradation demonstrated that the GQDs/Cu2O NCBs composites significantly degraded >98% of the total dye amount within 30 min. In summary, the novel composites possessed potential high catalytic activity and could be utilized as photocatalysts in the treatment of organic pollutants and biological waste such as dyes, antibiotics, and pesticides. پرونده مقاله

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15 - The most important parameters that affect the photocatalytic activity of ZnO nanostructures against organic dyes: A Review
Marwa Jawad Kadhim Mazin Auny Mahdi Abbas Mohammed Selman Salwan Kamal Jamel Al-Ani Jalal Jabar Hassan Naser Mohammed Ahmed

10.30495/ijc.2023.1969439.1966

Organic dyes are among the main sources of water pollution that cause serious health problems for living organisms. Removing dye pollution from water sources is important because of its high toxicity, so it has attracted the interest of researchers. Heterogeneous photoc چکیده کامل

Organic dyes are among the main sources of water pollution that cause serious health problems for living organisms. Removing dye pollution from water sources is important because of its high toxicity, so it has attracted the interest of researchers. Heterogeneous photocatalysis based on ZnO is one of the most important methods of pollution treatment. The purpose of this review is to summarize the use of ZnO nanostructure and ZnO modified as photocatalysts.The studied mechanism of dye photocatalytic activity and the most important factors affecting the photocatalytic process are discussed. The major effective parameters associated with the surface and morphology to look upon for the efficient photodegradation of organic pollution are structural and average particle size, surface area, band gap crystalline structure, surface density, and porosity. The photodegradation reactions depend on the state of ionization as well as on the surface charge of the photocatalyst and organic dye because pH will determine the charge of the catalyst according to the medium. On the other hand, the calcination temperature was increased throughout the work to break down the pores, which reduces the surface area of the synthesis photocatalyst. The type of dye has an important influence on the success of the photocatalytic process. پرونده مقاله

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16 - Characterization, photocatalytic, and antibacterial activity of Ag–TiO2 nanoparticles prepared by electrical arc discharge method
Mahdi Hajivaliei Majid Lashkanpour

A simple, inexpensive and one-step synthesis route of Ag-TiO2 nanoparticles by arc discharge method isreported. The resulting nanoparticles were characterized using X-ray diffraction and scanning electronmicroscopy. X-ray diffraction patterns demonstrate dominance of ru چکیده کامل

A simple, inexpensive and one-step synthesis route of Ag-TiO2 nanoparticles by arc discharge method isreported. The resulting nanoparticles were characterized using X-ray diffraction and scanning electronmicroscopy. X-ray diffraction patterns demonstrate dominance of rutile to anatase phase in TiO2 andformation of silver metal on TiO2 after arc discharge process. Scanning electron microscopy images exhibitthe increase of reduced nanoparticles in 5 minutes arc duration compared with 1 minute arc duration.Photodegradation of Methyl Orange as a standard pollutant shows that the presence of silver in TiO2 wasfound to enhance the photocatalytic activity. The high activity of silver doped TiO2 is due to theenhancement of electron–hole separation by the electron trapping of silver particles. Antibacterial activitiesof Ag-TiO2 nanoparticles were investigated at the presence of Escherichia coli bacteria. پرونده مقاله

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17 - Photocatalytic Degradation of Phenol in Water Solution by Phosphotungstic Acid on TiO2/ZnO Nanoparticles as Supporting Solid
Marzieh Nasiriyan معصومه طباطبایی Seyed Abolghasem Mirhoseini

A Keggin-type heteropolyoxometalate (H3PW12O40) supported on TiO2/ZnO nanoparticles was used for the degradation of phenol under UV light and H2O2 as oxidant. Based on the results, heterogenization of H3PW12O40 on TiO2/ZnO could improve the photocatalytic process and چکیده کامل

A Keggin-type heteropolyoxometalate (H3PW12O40) supported on TiO2/ZnO nanoparticles was used for the degradation of phenol under UV light and H2O2 as oxidant. Based on the results, heterogenization of H3PW12O40 on TiO2/ZnO could improve the photocatalytic process and could be considered an appropriate heterogonous photocatalyst in the removal of phenol from aqueous solutions in the presence of hydrogen peroxide. Degradation of phenol in the presence of the H3PW12O40/TiO2/ZnO could lead to the disappearance of approximately 95% of phenol under UV irradiation and optimized condition. In the same experiment H3PW12O40 as a homogenous catalyst, removed 70% phenol and the heterogeneous TiO2/ZnO catalyst removed less than 70% phenol from the water solution in the same conditions. پرونده مقاله

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