Scholarlink

<p>This study examined the photocatalytic degradation of Basic Red 46 (BR46) and Basic Violet 16 (BV16) dyes using the n-TiO<sub>2</sub>-P25@ECH@ZrO<sub>2</sub>-SO<sub>3</sub>H catalyst in aqueous media. The effects of pH and LED light wavelength (blue and green) on dye removal were tested over 0–5&#xa0;h. BV16 showed highest degradation under blue light and adsorption (43%) in basic media. Kinetic modeling revealed two-step first order reactions with rate constants k<sub>1</sub> = 0.0111&#xa0;min⁻<sup>1</sup> and k<sub>2</sub> = 0.0134&#xa0;min⁻<sup>1</sup>. Maximum BV16 adsorption (74%) occurred under acidic conditions, though degradation was minimal. BR46 showed best removal (48%) under acidic pH media. The catalyst demonstrated dual functionality: effective BR46 adsorption in acidic media and strong photocatalytic and adsorptive removal of BV16. These findings suggest tailored applications of the catalyst based on wastewater pH for optimal dye elimination.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Adsorption-assisted photocatalytic degradation of some reactive dyes in aqueous solutions: kinetic modelling of decolorization processes

  • 期刊论文

  • 发表日期：

    2025年10月3日

查看全文
  • Farzaneh Khorammanesh,
  • S. Maryam Sajjadi,
  • Ali Amoozadeh,
  • Mehrnoosh Bitaraf

摘要

This study examined the photocatalytic degradation of Basic Red 46 (BR46) and Basic Violet 16 (BV16) dyes using the n-TiO2-P25@ECH@ZrO2-SO3H catalyst in aqueous media. The effects of pH and LED light wavelength (blue and green) on dye removal were tested over 0–5 h. BV16 showed highest degradation under blue light and adsorption (43%) in basic media. Kinetic modeling revealed two-step first order reactions with rate constants k1 = 0.0111 min⁻1 and k2 = 0.0134 min⁻1. Maximum BV16 adsorption (74%) occurred under acidic conditions, though degradation was minimal. BR46 showed best removal (48%) under acidic pH media. The catalyst demonstrated dual functionality: effective BR46 adsorption in acidic media and strong photocatalytic and adsorptive removal of BV16. These findings suggest tailored applications of the catalyst based on wastewater pH for optimal dye elimination.

Graphical abstract