实验技术与管理2025，Vol.42Issue(11)：72-79,8.DOI:10.16791/j.cnki.sjg.2025.11.008
Fe掺杂SrTiO3材料的制备及光催化性能实验设计
Experimental design and photocatalytic performance of Fe-doped SrTiO3
摘要
Abstract
[Objective]With global economic development,over-reliance on fossil fuels has resulted in energy security concerns,concomitantly inducing environmental pollution and ecological degradation.As a pivotal application of photocatalytic technology,photocatalytic degradation of dyes is predominantly contextualized within the exigencies of dye pollution and its remediation.Dye-containing wastewater,characterized by intricate compositions and high biotoxicity,remains recalcitrant to complete purification through conventional treatment techniques.Strontium titanate(SrTiO3),a prototypical perovskite-type semiconductor photocatalyst,exhibits merits such as high chemical stability and robust oxidizing capacity.Nevertheless,pristine SrTiO3 possesses a relatively wide band gap(～3.2 eV),which confines its light absorption to the ultraviolet region,resulting in low solar energy utilization.Furthermore,photo-generated charge carriers tend to recombine readily,limiting their catalytic activity.[Methods]To surmount these challenges,Fe-doped SrTiO3 was prepared using the combustion method.As a transition metal,the ionic radius of Fe ions renders them highly compatible with Sr2+and Ti4+;upon doping,impurity energy levels are introduced,thus narrowing the band gap of SrTiO3 and extending its absorption range to visible light.Simultaneously,Fe ions can function as trapping centers for electrons or holes,thereby suppressing carrier recombination and enhancing photocatalytic activity.This renders Fe-doped SrTiO3 more suitable for meeting the practical demands of dye-containing wastewater degradation.The phase structure,microstructure,specific surface area,and light absorption properties of the synthesized samples were characterized and analyzed using various techniques,including X-ray powder diffraction,scanning electron microscopy,specific surface area analysis,and ultraviolet-visible diffuse reflectance spectroscopy.[Results]The results demonstrated that Fe3+was successfully doped into the lattice of SrTiO3,substituting for a portion of Ti4+.Compared with that of SrTiO3,the degradation rate of tetracycline hydrochloride was significantly accelerated after Fe3+doping,with a substantial improvement in degradation efficiency.As the doping amount increased,the degradation degree of tetracycline hydrochloride by Fe-doped SrTiO3 first increased and subsequently decreased;when the Fe doping amount reached 2%,a maximum degradation efficiency of 60.56%was observed after 105 min.[Conclusions]The improved photocatalytic activity observed in this study is attributed to enhanced light response,increased specific surface area,and improved carrier separation efficiency.Experiments covering the research background,combustion synthesis,characterization,and performance evaluation of Fe-doped SrTiO3 photocatalysts were designed.These experiments consolidate theoretical knowledge and experimental skills,refine scientific thinking,and provide a solid foundation for cultivating talents with innovative research capability and comprehensive practical skills.关键词
光催化/SrTiO3/掺杂改性/钙钛矿型氧化物Key words
photocatalysis/SrTiO3/doping modification/perovskite-type oxides分类
化学化工引用本文复制引用
范慧,陈姝君,敖卫华,房明浩..Fe掺杂SrTiO3材料的制备及光催化性能实验设计[J].实验技术与管理,2025,42(11):72-79,8.基金项目
中国地质大学(北京)教学实验室运行经费(212104005) （北京）
中国地质大学(北京)教学实验室与实验技术研究应用经费(640125006) （北京）
