Scholarlink

<p>Heterogeneous photocatalysis is a highly efficient process for degrading recalcitrant and emerging pollutants. This work investigates the properties of gallium-indium oxides heterojunction photocatalysts synthesized from a gallium-based liquid metal (Ga<sub>75.5</sub>In<sub>24.5</sub> alloy) doped with Cu ions at 5, 7 and 10 wt (Cu<sub>x</sub>IG) and without doping (IG). Cu<sub>x</sub>IG were synthesized by simple precipitation assisted by a hydrothermal process and subjected to a thermal treatment at 1000&#xa0;°C. These materials were characterized by XRD, XPS, FT-IR, UV-Vis-IR spectroscopy in diffuse reflectance mode, TGA, and SEM/EDX. These photocatalysts reveal a Cu<sub>x</sub>O/In<sub>2</sub>O<sub>3</sub>/Ga<sub>2</sub>O<sub>3</sub> heterojunction. The copper content influences the structural, morphological, optical, and photocatalytic properties. The photocatalytic activity of these materials was investigated in degrading acetaminophen (Ac), a nonbiodegradable and highly recalcitrant compound persistent to conventional treatment processes, at pH 3, 5, 7, and 9. IG photocatalyst showed photocatalytic activity under UVB light (~ 90% Ac degradation at pH 5 and 7). Cu<sub>x</sub>IG heterojunction photocatalysts have photocatalytic activity under visible illumination (at pH 5), and the optimal concentration of copper species is at 5% wt. However, Cu<sub>x</sub>IG photocatalysts exhibited low stability in cycling; the photoactivity decreased considerably after the first cycle. Different scavengers were used to propose an Ac degradation route.</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

Photocatalytic Degradation of an Emerging Pollutant with Cu-Doped Gallium-Based Liquid Metal Catalysts, Under Visible Illumination

  • 期刊论文

  • 发表日期：

    2025年2月3日

查看全文
  • Karen Murguía-Ceja,
  • Jaime Espino,
  • Esteban Montiel,
  • Michel Rivero,
  • Sayra Orozco

摘要

Heterogeneous photocatalysis is a highly efficient process for degrading recalcitrant and emerging pollutants. This work investigates the properties of gallium-indium oxides heterojunction photocatalysts synthesized from a gallium-based liquid metal (Ga75.5In24.5 alloy) doped with Cu ions at 5, 7 and 10 wt (CuxIG) and without doping (IG). CuxIG were synthesized by simple precipitation assisted by a hydrothermal process and subjected to a thermal treatment at 1000 °C. These materials were characterized by XRD, XPS, FT-IR, UV-Vis-IR spectroscopy in diffuse reflectance mode, TGA, and SEM/EDX. These photocatalysts reveal a CuxO/In2O3/Ga2O3 heterojunction. The copper content influences the structural, morphological, optical, and photocatalytic properties. The photocatalytic activity of these materials was investigated in degrading acetaminophen (Ac), a nonbiodegradable and highly recalcitrant compound persistent to conventional treatment processes, at pH 3, 5, 7, and 9. IG photocatalyst showed photocatalytic activity under UVB light (~ 90% Ac degradation at pH 5 and 7). CuxIG heterojunction photocatalysts have photocatalytic activity under visible illumination (at pH 5), and the optimal concentration of copper species is at 5% wt. However, CuxIG photocatalysts exhibited low stability in cycling; the photoactivity decreased considerably after the first cycle. Different scavengers were used to propose an Ac degradation route.