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<p>In this research, TiO<sub>2</sub> and copper-modified TiO<sub>2</sub> were investigated in the process of isopropanol photocatalytic removal from the air. Modification of TiO<sub>2</sub> with copper was carried out using two methods: impregnation and chemical reduction.&#xa0;XRD, XPS, FESEM, EDAX, PL and UV–Vis DRS were used to study the chemical and physical characteristics of TiO<sub>2</sub> and copper-modified TiO<sub>2</sub>. UV–Vis DRS and PL results indicated that copper loading on TiO<sub>2</sub> increases absorption in the visible range and significantly reduces the recombination of photoelectron and hole pairs. XRD and XPS analyses showed that both copper species i.e., Cu<sub>2</sub>O and CuO exist in the Cu<sub><i>x</i></sub>O/TiO<sub>2</sub>(RE) photocatalyst. According to photocatalytic tests, copper-modified TiO<sub>2</sub> exhibited enhanced photocatalytic activity compared to pure TiO<sub>2</sub>, and the optimal photocatalyst (Cu<sub><i>x</i></sub>O(1%)/TiO<sub>2</sub>(RE)) decomposed 100% isopropanol under visible light radiation.</p> Graphical abstract <p></p>

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Role of copper in modified TiO2 for photocatalytic degradation of gaseous isopropanol from air under ultraviolet and visible light radiation

  • 期刊论文

  • 发表日期：

    2025年6月14日

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  • Parvaneh Nakhostin Panahi,
  • Zahra Karami,
  • Razieh Habibpour,
  • Aligholi Niaei

摘要

In this research, TiO2 and copper-modified TiO2 were investigated in the process of isopropanol photocatalytic removal from the air. Modification of TiO2 with copper was carried out using two methods: impregnation and chemical reduction. XRD, XPS, FESEM, EDAX, PL and UV–Vis DRS were used to study the chemical and physical characteristics of TiO2 and copper-modified TiO2. UV–Vis DRS and PL results indicated that copper loading on TiO2 increases absorption in the visible range and significantly reduces the recombination of photoelectron and hole pairs. XRD and XPS analyses showed that both copper species i.e., Cu2O and CuO exist in the CuxO/TiO2(RE) photocatalyst. According to photocatalytic tests, copper-modified TiO2 exhibited enhanced photocatalytic activity compared to pure TiO2, and the optimal photocatalyst (CuxO(1%)/TiO2(RE)) decomposed 100% isopropanol under visible light radiation.

Graphical abstract