化工新型材料

化工新型材料 ›› 2026, Vol. 54 ›› Issue (10) : 202-208. DOI: 10.19817/j.cnki.issn1006-3536.2026.10.030

科学研究

牺牲模板法合成铜掺杂二氧化钛及其光催化降解罗丹明B性能研究

^1,2

^1,2*

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A study on the synthesis of copper-doped titanium dioxide via sacrificial template method and its photocatalytic degradation performance toward Rhodamine B

Qi Li^1,2, Ke Xinyu¹, Xu Silin¹, Sun Xiaohua¹, Yu Huanhuan^1,2

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Received
2025-11-11
Issue Date	Revised Date
2026-10-13	2025-11-11

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摘要

二氧化钛(TiO₂)是一种良好的半导体光催化材料,但由于禁带宽度大和光生载流子复合率高限制了其应用。以石墨相氮化碳(g-C₃N₄)为模板、硝酸铜(CuNO₃)为铜源,通过牺牲模板策略,使用溶胶-凝胶法制备出铜掺杂TiO₂光催化剂(Cu-TiO₂-CN),对TiO₂进行掺杂改性。通过X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、冷场发射扫描电镜(SEM)、透射电子显微镜(TEM)、N₂吸附-脱附(BET)、X射线光电子能谱(XPS)、固体紫外-可见吸收漫反射(UV-Vis)和电化学阻抗(EIS)等技术对催化剂进行表征。证明在以g-C₃N₄为模板剂的条件下,二价铜离子(Cu²⁺)成功掺杂入TiO₂。在紫外光照射下,以罗丹明B(RhB)的降解为模板反应测试其催化性能,35min后,RhB降解率为99.8%,表明Cu-TiO₂-CN在紫外光下对RhB表现出优异的光催化降解性能,远高于单一的TiO₂。

Abstract

Titanium dioxide (TiO₂) is a good semiconductor photocatalytic material,but its application is limited by its wide bandgap and high photogenerated carrier recombination rate.Through a sacrificial template strategy,with using graphitic phase carbon nitride (g-C₃N₄) as a template,a copper-doped titanium dioxide photocatalyst (Cu-TiO₂-CN) was prepared by sol-gel method to modify TiO₂.The catalysts were characterized by X-ray diffractometer (XRD),Fourier transform infrared spectrometer (FT-IR),cold field emission scanning electron microscope (SEM),transmission electron microscope (TEM),N₂ adsorption-desorption (BET),X-ray photoelectron spectroscopy (XPS),UV-Vis spectroscopy (UV-Vis) and electrochemical impedance spectroscopy (EIS).The results proved that the Cu²⁺ was successfully doped into TiO₂ under the condition of g-C₃N₄ as a template.Under UV light irradiation,the Rhodamine B (RhB) degradation was used as a template reaction to evaluate its catalytic performance.After 35 min of UV irradiation,the RhB degradation rate was 99.8%,demonstrating that Cu-TiO₂ exhibited excellent photocatalytic degradation performance for RhB under UV light irradiation,which was much higher than that of single TiO₂.

关键词

二氧化钛 / 光催化降解 / 掺杂 / 改性

Key words

titanium dioxide / photocatalytic degradation / doping / modification

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牺牲模板法合成铜掺杂二氧化钛及其光催化降解罗丹明B性能研究[J]. 化工新型材料, 2026, 54(10): 202-208 DOI:10.19817/j.cnki.issn1006-3536.2026.10.030

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