化工新型材料

化工新型材料 ›› 2026, Vol. 54 ›› Issue (10) : 226-229. DOI: 10.19817/j.cnki.issn1006-3536.2026.10.011

科学研究

双金属共掺杂TiO₂复合材料的制备及其光催化降解亚甲基蓝性能研究

作者信息 +

Synthesis of bimetallic co-doped TiO₂ composites and their photocatalytic performance for methylene blue degradation

Zhang Jie¹, Guo Chang¹, Liao Xuemei²

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文章历史 +

Received
2025-06-05
Issue Date	Revised Date
2026-10-13	2025-06-05

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摘要

通过水热法制备了Fe/Ni共掺杂TiO₂复合材料,显著提升了其可见光催化性能。紫外-可见漫反射光谱分析表征结果表明,Fe/Ni掺杂使TiO₂的禁带宽度降低,光吸收范围拓展至可见光区;荧光光谱分析证实,掺杂有效抑制了光生载流子复合。在优化条件(Fe/Ni质量比1∶0.6、煅烧温度500℃、pH=8)下,亚甲基蓝降解率达83%。自由基捕获实验表明,光生空穴(h⁺)为主导活性物种,其通过直接氧化与间接生成·OH、·O^-₂的协同作用实现高效降解。为设计高效双金属掺杂光催化剂提供了理论依据。

Abstract

Fe/Ni co-doped TiO₂ composites were synthesized via a hydrothermal method,which significantly enhanced their visible-light photocatalytic performance.Characterization by UV-Vis diffuse reflectance spectroscopy (DRS) revealed that Fe/Ni doping reduced the band gap of TiO₂ and extended its light absorption range into the visible region.Photoluminescence (PL) spectroscopy confirmed that doping effectively suppressed the recombination of photoinduced charge carriers.Under optimized conditions (Fe/Ni mass ratio of 1∶0.6,calcination temperature of 500℃,pH=8),the degradation rate of methylene blue reached 83%.Radical trapping experiments indicated that photogenerated holes (h⁺) served as the dominant active species,achieving efficient degradation through the synergistic effects of direct oxidation and the indirect generation of ·OH and ·O^-₂ radicals.This study offers theoretical guidance for designing efficient bimetallic-doped photocatalysts.

关键词

改性TiO₂ / 金属掺杂 / 亚甲基蓝 / 光催化 / 自由基捕获

Key words

modified TiO₂ / metal doping / methylene blue / photocatalysis / radical trapping

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双金属共掺杂TiO₂复合材料的制备及其光催化降解亚甲基蓝性能研究[J]. 化工新型材料, 2026, 54(10): 226-229 DOI:10.19817/j.cnki.issn1006-3536.2026.10.011

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