Facile Construction of CdS/g-C3N4 Photocatalyst for Enhanced Removal of Methyl Orange

IF 3.8 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water, Air, & Soil Pollution Pub Date : 2025-05-05 DOI:10.1007/s11270-025-08086-9

Qiang Gao, Mengnan Wang, Yining Zhu, Yongming Chai, Bin Liu

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引用次数: 0

Abstract

The construction of heterojunction photocatalysts as an effective strategy have been widely used in the eradication of organic dyes in wastewater. Herein, we designed a series of CdS/g-C₃N₄ heterostructures by solid-state thermolysis assisted ultrasonic dispersion method, anchoring 1D CdS onto the surface of 2D g-C₃N₄, and applied to the degradation of methyl orange (MO) under visible light. The ultra-thin nanosheets of 2D g-C₃N₄ and typical heterostructures of CdS/g-C₃N₄ composites were determined by a series of morphological characterizations. The resulting photocatalysts exhibited enhanced photocatalytic MO removal efficiency and stability than CdS and g-C₃N₄, and shown excellent degradation performance for many other organic dyes such as RhB, MB, MG, and CR. The active radicals in the degradation system were investigated by quenching experiments, and the dominant role of ^•O₂⁻ was verified. Additionally, a plausible photocatalytic mechanism of S-Scheme heterojunction was proposed.

Graphical Abstract

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CdS/g-C3N4光催化剂的简易构建及对甲基橙的强化去除

异质结光催化剂的构建作为去除废水中有机染料的一种有效策略已被广泛应用。本文采用固态热裂解辅助超声分散的方法设计了一系列CdS/g-C3N4异质结构，将1D CdS锚定在2D g-C3N4表面，并应用于可见光下甲基橙（MO）的降解。通过一系列的形态学表征确定了2D g-C3N4的超薄纳米片和CdS/g-C3N4复合材料的典型异质结构。所得光催化剂的光催化MO去除率和稳定性均高于CdS和g-C3N4，对RhB、MB、MG、CR等多种有机染料也表现出优异的降解性能。通过淬灭实验研究了活性自由基在降解体系中的作用，证实了•O2−的主导作用。此外，还提出了S-Scheme异质结的光催化机理。图形抽象

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.