بررسی جامع عملکرد فوتوکاتالیزی کامپوزیت La/TiO2-Fe2O3 در حذف پنج رنگزای مختلف در شرایط بهینه pH و زمان

پارسافرد, نسترن

doi:10.30509/jscw.2025.167442.1218

بررسی جامع عملکرد فوتوکاتالیزی کامپوزیت La/TiO2-Fe2O3 در حذف پنج رنگزای مختلف در شرایط بهینه pH و زمان

نوع مقاله : پژوهشی

نویسنده

نسترن پارسافرد

دانشیار، گروه شیمی کاربردی، دانشگاه کوثر بجنورد، خراسان شمالی، بجنورد، ایران، کد‌پستی: 9453155168.

10.30509/jscw.2025.167442.1218

چکیده

این پژوهش عملکرد فوتوکاتالیزی کاتالیست دی اکسید تیتانیم/ اکسید آهن دوپ‌شده با لانتانیم در حذف فوتوکاتالیزی رنگزا‌های متیل رد، آلیزارین رد، متیلن بلو، متیل اورانژ و فنل فتالئین را بررسی می‌کند. این حذف فوتوکاتالیزی در شرایط مختلف از لحاظ اسیدیته محیط ( 11-3 pH=)، زمان انجام واکنش (min 0-35t= ) در دمای ثابت °C 45، غلظت رنگزای برابر با ppm 10 و 25/0 گرم کاتالیست انجام شد. نتایج نشان می‌دهد که فعالیت فوتوکاتالیزی به شدت به pH محلول و زمان واکنش بستگی دارد. برای بررسی اثرات هم‌زمان این دو عامل بر بازده‎ تخریب فوتوکاتالیزی از روش بهینه‌سازی سطح پاسخ استفاده شد. بهترین بازده‎ تخریب فوتوکاتالیزی برای رنگزای آلیزارین رد در 3 pH= و در زمان 35 دقیقه برابر با 77/93 درصد حاصل شد. یافته‌ها اثربخشی کاتالیست La/TiO₂-Fe₂O₃ را در افزایش تخریب سایر رنگزاها (متیل رد (25/46 درصد)، متیلن بلو (37/42 درصد)، متیل اورانژ (03/11 درصد) و فنل فتالئین (84/57 درصد)) در 3 pH= نشان می‌دهد و بینش‌های ارزشمندی را برای بهینه‌سازی فرایند‎های فوتوکاتالیزی ارائه می‌کند.

کلیدواژه‌ها

موضوعات

رنگ و محیط زیست

عنوان مقاله [English]

Comprehensive Investigation of Photocatalytic Performance of La/TiO2-Fe2O3 Composite in the Degradation of Five Different Dyes under Optimized pH and Time Conditions

نویسنده [English]

Nastaran Parsafard

Department of Applied Chemistry, Kosar University of Bojnord, P. O. Code: 9453155168, North Khorasan, Bojnord, Iran.

چکیده [English]

This study investigates the photocatalytic performance of lanthanum-doped titanium dioxide/iron oxide catalyst in the photocatalytic removal of methyl red, alizarin red, methylene blue, methyl orange, and phenolphthalein dyes. This photocatalytic removal was done under different environmental acidity conditions (pH=3-11), reaction time (t=0-35 min) at a constant temperature of 45 °C, dye concentration equal to 10 ppm, and 0.25 g of catalyst. The results show that the photocatalytic activity strongly depends on the solution pH and reaction time. Response surface methodology optimization was employed to investigate the simultaneous effects of these two parameters on photocatalytic degradation efficiency. The best photocatalytic degradation efficiency for alizarin red dye was achieved at pH=3 and at a time of 35 min with 93.77%. The findings demonstrate the effectiveness of the La/TiO2-Fe2O3 catalyst in enhancing the degradation of other dyes (methyl red (46.25%), methylene blue (42.37%), methyl orange (11.03%) and phenolphthalein (57.84%)) at pH=3 and provide valuable insights for the optimization of photocatalytic processes.

کلیدواژه‌ها [English]

Dye
Photocatalytic Degradation
UV Light
Response Surface Methodology

مراجع

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