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日用化学工业（中英文）

日用化学工业（中英文） ›› 2026, Vol. 56 ›› Issue (2): 191-200.doi: 10.3969/j.issn.2097-2806.2026.02.007

• 基础研究 • 上一篇    下一篇

氧空位TiO2/Sn3O4复合材料协同增强可见光催化降解甲基橙

贾彩玲1,3,*(),张占庭1,闫富伟1,刘福跃2,伍燕妮1,王芬4,谢海娇5   

  1. 1.中国蒙牛乳业股份有限公司，内蒙古 呼和浩特 011500
    2.华润电力（锡林郭勒）煤业有限公司，内蒙古 锡林郭勒 026200
    3.内蒙古大学 生态与环境学院，内蒙古 呼和浩特 010021
    4.洋县中学，陕西 汉中 723300
    5.杭州研趣信息技术有限公司，浙江 杭州 310003
  • 收稿日期:2025-06-08 修回日期:2026-01-21 出版日期:2026-02-22 发布日期:2026-03-09

Synergistic enhancement of visible-light photocatalytic methyl orange degradation via oxygen vacancy TiO2/Sn3O4 composites

Cailing Jia1,3,*(),Zhanting Zhang1,Fuwei Yan1,Fuyue Liu2,Yanni Wu1,Fen Wang4,Haijiao Xie5   

  1. 1. China Mengniu Dairy Co., Ltd., Hohhot, Inner Mongolia 011500, China
    2. China Resources Power（Xilingol）Coal Industry Co., Ltd., Xilingol, Inner Mongolia 026200, China
    3. School of Ecology and Environment, Inner Mongolia University, Hohhot, Inner Mongolia 010021, China
    4. Yangxian High School, Hanzhong, Shaanxi 723300, China
    5. Hangzhou Yanqu Information Technology Co., Ltd., Hangzhou, Zhejiang 310003, China
  • Received:2025-06-08 Revised:2026-01-21 Online:2026-02-22 Published:2026-03-09
  • Contact: E-mail: jiacailing@mengniu.cn.

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摘要：

工业化的快速发展显著加剧了水污染问题，例如甲基橙（MO）等持续性污染物。传统的修复技术，包括吸附和生物降解，常受限于效率低下和存在二次污染风险。光催化技术作为一种有前景的可持续替代方案应运而生；然而，基准材料二氧化钛（TiO2）存在固有的局限性，尤其是其宽带隙能量（≥3.4 eV）将活性限制在紫外光区，以及光生载流子的快速复合。为克服这些限制，该研究通过溶剂热法合成了新型的TiO2/Sn3O4异质结复合光催化剂。综合表征技术证实了复合物的成功形成，揭示了超薄Sn3O4纳米片均匀地包覆在TiO2纳米球上。这种独特的结构有效降低了整体结晶度并引入了有益的氧空位。在可见光照射下（λ≥420 nm），优化后的TiO2/Sn3O4复合材料展现出卓越的光催化性能，在短短60 min内即可实现96%的MO降解率。计算所得的表观动力学速率常数（0.103 min-1）显著高于纯TiO2，是其5.15倍。电子自旋共振（ESR）实验确定羟基自由基（·OH）是驱动降解的主要活性物种。此外，循环降解测试证明了材料优异的稳定性，复合材料在连续四次重复使用后仍能保持其初始效率的85%。该研究强调了TiO2/Sn3O4异质结内部的协同效应，该效应显著增强了可见光吸收、电荷分离和光催化活性，为设计用于先进环境修复应用的高效、稳定催化剂提供见解。

关键词: TiO2/Sn3O4复合材料, 可见光光催化, 甲基橙降解, 氧空位, 羟基自由基

Abstract:

The escalating pace of industrialization has significantly intensified water pollution challenges, for instance, the persistent organic pollutants like methyl orange（MO）. Conventional remediation techniques, such as adsorption and biological degradation, are often hampered by low efficiency and the risk of secondary pollution. Photocatalysis emerges as a promising sustainable alternative; however, the benchmark material titanium dioxide（TiO2）suffers from its intrinsic limitations, notably its wide bandgap energy（≥3.4 eV）restricting its activity to the region of the ultraviolet light and its rapid recombination of photogenerated charge carriers. To overcome these constraints, this research focused on synthesizing novel TiO2/Sn3O4 heterojunction composite photocatalysts via a solvothermal approach. Comprehensive characterization techniques confirmed the successful formation of the composite, which revealed that ultrathin Sn3O4 nanosheets uniformly coated TiO2 nanospheres. This unique architecture effectively reduced the overall crystallinity and introduced the beneficial oxygen vacancies. Under visible-light irradiation（λ≥420 nm）, the optimized TiO2/Sn3O4 composite exhibited the exceptional photocatalytic performance, which achieved 96% degradation of MO within just 60 minutes. The calculated apparent kinetic rate constant（0.103 min-1）was remarkably（5.15 times）higher than that of pristine TiO2. ESR experiments identified that hydroxyl radicals（·OH）was the predominant active species driving the degradation. Furthermore, cyclic degradation tests demonstrated its excellent material stability, with the composite retaining 85% of its initial efficiency after four consecutive reuse cycles. This work underscored the synergistic effects within the TiO2/Sn3O4 heterojunction, which significantly enhanced the visible-light absorption, charge separation, and photocatalytic activity, which provided the valuable insights for designing efficient, stable catalysts for the advanced environmental remediation applications.

Key words: TiO2/Sn3O4 composite, visible-light photocatalysis, methyl orange degradation, oxygen vacancies, hydroxyl radicals

中图分类号: 

  • X703