Composite Photocatalysts g-C3N4/TiO2 for Hydrogen Production and Dye Decomposition

IF 1.3 4区化学 Q4 CHEMISTRY, PHYSICAL Kinetics and Catalysis Pub Date : 2024-05-09 DOI:10.1134/S0023158423601225

A. V. Zhurenok, A. A. Sushnikova, A. A. Valeeva, A. Yu. Kurenkova, D. D. Mishchenko, E. A. Kozlova, A. A. Rempel’

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Abstract

The photocatalytic activity of the g-C₃N₄/TiO₂ composite samples in the processes of dye (methylene blue) decomposition and hydrogen evolution from an aqueous ethanol solution under the action of visible radiation (400 nm) has been studied. A new original method for the synthesis of the g-C₃N₄/TiO₂ composite by depositing g-C₃N₄/TiO₂ to TiO₂ nanoparticles during sol-gel synthesis is proposed. The synthesized photocatalysts were characterized by X-ray diffraction, low-temperature gas adsorption, X-ray photoelectron spectroscopy, high-resolution transmission microscopy, and diffuse reflectance spectroscopy in the UV and visible regions. The maximum activity in the hydrogen evolution reaction was 1.3 mmol \({\text{g}}_{{{\text{cat}}}}^{{ - 1}}\) h^–1, which exceeds the rate of hydrogen evolution on the unmodified g-C₃N₄ and TiO₂ samples.

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用于制氢和分解染料的 g-C3N4/TiO2 复合光催化剂

摘要研究了 g-C3N4/TiO2 复合样品在可见光辐射（400 nm）作用下从乙醇水溶液中分解染料（亚甲基蓝）和进化氢的光催化活性。研究提出了一种新的合成 g-C3N4/TiO2 复合材料的独创方法，即在溶胶-凝胶合成过程中将 g-C3N4/TiO2 沉积到 TiO2 纳米颗粒上。通过 X 射线衍射、低温气体吸附、X 射线光电子能谱、高分辨率透射显微镜以及紫外和可见光区漫反射光谱对合成的光催化剂进行了表征。氢气进化反应的最大活性为 1.3 mmol \({\text{g}}_{{text\{cat}}}}^{ - 1}}\) h-1，超过了未改性 g-C3N4 和 TiO2 样品的氢气进化速率。

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来源期刊

Kinetics and Catalysis 化学-物理化学

CiteScore

2.10

自引率

27.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Kinetics and Catalysis Russian is a periodical that publishes theoretical and experimental works on homogeneous and heterogeneous kinetics and catalysis. Other topics include the mechanism and kinetics of noncatalytic processes in gaseous, liquid, and solid phases, quantum chemical calculations in kinetics and catalysis, methods of studying catalytic processes and catalysts, the chemistry of catalysts and adsorbent surfaces, the structure and physicochemical properties of catalysts, preparation and poisoning of catalysts, macrokinetics, and computer simulations in catalysis. The journal also publishes review articles on contemporary problems in kinetics and catalysis. The journal welcomes manuscripts from all countries in the English or Russian language.