Scholarlink

<p>The present work here reports hydrothermal synthesis of rGO/SnO<sub>2</sub>/CeTiO<sub>4</sub> nanocomposites (RSC NCs). Structural characterization based on crystal size was 10.6&#xa0;nm and direct band gap energy of 2.92&#xa0;eV, indicating the material’s potential as a good sunlight-driven photocatalyst. FESEM revealed agglomerated RSC NCs and rGO with a stacked layer structure. TEM also indicated the homogeneous distribution of SnO<sub>2</sub> and CeTiO<sub>4</sub> nanoparticles across the surface of the rGO. The photocatalytic performance was evaluated by degrading methylene blue (MB) and methyl orange (MO) dyes, achieving significant removal efficiencies of 96.22% and 92.19%, respectively, at an initial concentration of 50 ppm after 90&#xa0;min of sunlight exposure. The degradation followed pseudo-first-order kinetics with rate constants (k) varying from 0.00258 to 0.03641&#xa0;min<sup>− 1</sup> for MB and from 0.00227 to 0.02133&#xa0;min<sup>− 1</sup> for MO. Hydroxyl radicals (•<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:OH\)</EquationSource> </InlineEquation>) and superoxide anions (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\:{{O}_{2}{\bullet\:}}^{-}\)</EquationSource> </InlineEquation> ) were found to be the active species responsible for the degradation. The material was also highly reusable and provided high efficiency for up to five cycles. The mixed dye solution of MB and MO also validated RSC NCs photocatalytic activity under sunlight. These results indicate the high performance of RSC NCs with higher degradation rates and excellent stability that render them as a promising and sustainable material for the cleanup of environmental pollutants.</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

Z-Scheme Photocatalytic Mechanism in Inorganic-Organic rGO Mediated SnO2/CeTiO4 Nanocomposites for Efficient Degradation of Organic Pollutants

  • 期刊论文

  • 发表日期：

    2026年1月27日

查看全文
  • Velumani Arun,
  • Yosephin Dewiani Rahmayanti,
  • Lalitha Gnanasekaran,
  • Dharani Shanmugapriya,
  • Tri Marji Atmono,
  • Khusnul Khotimah,
  • Paranthaman Vijayakumar,
  • Akhtar Rasool,
  • Atul Singh,
  • Murni Handayani

摘要

The present work here reports hydrothermal synthesis of rGO/SnO2/CeTiO4 nanocomposites (RSC NCs). Structural characterization based on crystal size was 10.6 nm and direct band gap energy of 2.92 eV, indicating the material’s potential as a good sunlight-driven photocatalyst. FESEM revealed agglomerated RSC NCs and rGO with a stacked layer structure. TEM also indicated the homogeneous distribution of SnO2 and CeTiO4 nanoparticles across the surface of the rGO. The photocatalytic performance was evaluated by degrading methylene blue (MB) and methyl orange (MO) dyes, achieving significant removal efficiencies of 96.22% and 92.19%, respectively, at an initial concentration of 50 ppm after 90 min of sunlight exposure. The degradation followed pseudo-first-order kinetics with rate constants (k) varying from 0.00258 to 0.03641 min− 1 for MB and from 0.00227 to 0.02133 min− 1 for MO. Hydroxyl radicals (• \(\:OH\) ) and superoxide anions ( \(\:{{O}_{2}{\bullet\:}}^{-}\) ) were found to be the active species responsible for the degradation. The material was also highly reusable and provided high efficiency for up to five cycles. The mixed dye solution of MB and MO also validated RSC NCs photocatalytic activity under sunlight. These results indicate the high performance of RSC NCs with higher degradation rates and excellent stability that render them as a promising and sustainable material for the cleanup of environmental pollutants.