عاملدار کردن و سنتز پایدار نانوکامپوزیت PET-AuNPs به روش سونوشیمی و مطالعات کمی و کیفی الکتروشیمیایی با الکترود اصلاح شده AuNPs-PET/CNT/Au

محورهای موضوعی : پلیمرهای پیشرفته

جواد مرادپور ¹ (دانشجو گروه شیمی دانشگاه آزاد اسلامی واحد ایلام)
حسین پیمان ² (گروه شیمی، دانشکده علوم پایه، دانشگاه آزاد اسلامی واحد ایلام. عضو هیات علمی)
حمیده روشنفکر ³ (عضو هیات علمی، گروه شیمی، دانشکده علوم پایه، دانشگاه آزاد اسلامی واحد ایلام)

تاریخ دریافت : 1401/03/25 تاریخ پذیرش : 1401/12/02 تاریخ انتشار : 1402/03/01

کلید واژه: پلی اتیلن ترفتالات, جاذب, اولتراسونیک, نانوذرات طلا, عامل‌دار کردن,

چکیده مقاله :

پلی اتیلن ترفتالات در صنایع مختلف کاربرد دارد، اما به دلیل فقدان گروه‌های عاملی در سطح با محدودیت کاربرد مواجه می باشد و نیازمند اصلاح سطح جهت بهبود کاربرد می‌باشد. در این پژوهش ابتدا سطح الیاف PET با گروه‌های کربوکسیلیک اسید عامل‌دار گردید. سپس، در محیط قلیایی نانوذرات طلا به روش سونوشیمی بصورت پایدار بر سطح آن سنتز شد و اثر پارامتر های موثر بر اندازه و تراکم نانو ذرات بررسی و بهینه گردید (دما، توان دستگاه التراسونیک و pH). از توانایی نانوکامپوزیت PET-AuNPs برای حذف رنگ های صنعتی از محیط زیست استفاده و در حذف و اندازه گیری رنگ متیل اورانژ از محیط‌های آبی استفاده شد و اثر غلظت اولیه رنگ، زمان و pH بررسی و بهینه گردید. در اندازه‌گیری کمی الکتروشیمیایی رنگ، الکترود اصلاح شده AuNPs-PET/CNT/Au در دامنه 20 تا 60 میکرومولار دارای پاسخ خطی بود. حد تشخیص این الکترود 55 میکرومولار و اثر سرعت روبش پتانسیل بر جریان پیک و اثر pH محلول بررسی گردید. مطالعات تعادلات جذب نشان دادند که جذب از ایزوترم تمکین پیروی می‌نماید.

چکیده انگلیسی:

Polyethylene terephthalate is used in various industries, but due to the lack of functional groups on the surface, it is limited in use and needs surface modification to improve the application. In this study, the surface of PET fibers was first functionalized with carboxylic acid groups. Then, in an alkaline medium, gold nanoparticles were synthesized sonochemically on their surface, and the effect of parameters affecting the size and density of nanoparticles was investigated and optimized (temperature, power of ultrasonic device, and pH). The ability of PET-AuNPs nanocomposites to remove industrial dyes from the environment was used, and the removal and measurement of methyl orange dye from aqueous media were used. The effect of initial dye concentration, time, and pH was investigated and optimized. In quantitative electrochemical dye measurements, the modified AuNPs-PET / CNT / Au electrode had a linear response in the range of 20 to 60 μM. The detection limit of this electrode was 55 μM, and the effect of potential scanning speed on peak flow and the effect of solution pH were investigated. Adsorption equation studies have shown that adsorption follows the obedience isotherm.

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