四羧基苯基卟啉铜敏化BiOCl纳米片的制备及其增强光催化性能研究  

Preparation of tetra(4-carboxyphenyl)porphyrin copper sensitized BiOCl nanosheets and their enhanced photocatalytic activity

作　　者：毕佳敏 徐来[1] 孙惠钰 刘瑞丹 乔儒[1] BI Jiamin;XU Lai;SUN Huiyu;LIU Ruidan;QIAO Ru(Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,Zhejiang Normal University,Jinhua 321004,China)

机构地区：[1]浙江师范大学先进催化材料教育部重点实验室,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2024年第1期36-45,共10页Journal of Zhejiang Normal University:Natural Sciences

基　　金：国家自然科学基金资助项目(21201151);浙江师范大学自主设计科研项目(2020ZS04);浙江省新苗人才计划资助项目(2021R404078)。

摘　　要：以硝酸铋和氯化钾为反应物,采用一步水热法合成了氯化氧铋(BiOCl)纳米片.通过考察不同反应时间和反应温度下所得BiOCl样品的光催化降解罗丹明B(RhB)活性差异,确定最佳合成条件,并在此基础上,采用相同方法原位合成四羧基苯基卟啉铜(CuTCPP)敏化BiOCl复合光催化材料(BP).利用XRD,SEM,UV-Vis DRS,XPS,PL等手段表征了材料的结构、形貌及光学特性,通过RhB光降解实验考察了BP复合材料的光催化性能并讨论了光催化作用机理.结果表明,与纯BiOCl相比,BP的光催化活性明显增强,其中BP-0.2%样品的光催化活性最强,紫外光照射10 min即可将RhB完全降解,即使将光源改为模拟太阳光,在20 min内也可使染料分子完全降解.这种光催化性能的增强得益于CuTCPP作为光敏剂修饰BiOCl增强了该半导体的光吸收能力,并有效地提高了光生电子和空穴的产生和分离效率.Bismuth oxychloride(BiOCl)nanosheet photocatalyst was synthesized by one-step hydrothermal method using bismuth nitrate and potassium chloride as precursors.The optimal synthesis conditions were determined by comparing the catalytic activity of BiOCl samples obtained at different reaction times and temperatures in the photodegradation of Rhodamine B(RhB).Under the test conditions,tetra(4-carboxyphenyl)porphyrin copper(CuTCPP)sensitized BiOCl composite photocatalyst(BP)was synthesized in situ by the same one-step hydrothermal method.The structure,morphology and optical properties of the photocatalytic materials were characterized by XRD,SEM,UV-Vis DRS,XPS and PL.The photocatalytic performance of BP composites was evaluated by RhB photodegradation experiments,meanwhile,their photocatalytic mechanism was also investigated.The results showed that the photocatalytic activities of BP composites were significantly enhanced compared with pure BiOCl.Among them,BP-0.2%sample showed the strongest photocatalytic activity,and RhB was completely degraded within 10 min under UV light excitation.Even if the light source was changed to simulate sunlight,BP-0.2%could also completely degrade the dye molecules within 20 min of illumination.The reason for the improvement of photocatalytic performance of BP composite was reckoned that the modification of BiOCl with CuTCPP photosensitizer could enhance the light absorption capacity of the semiconductor,and effectively improve the generation and separation of photogenerated electrons and holes in the catalyst system.

关 键 词：氯化氧铋 四羧基苯基卟啉铜 染料敏化 光催化性能 反应机理 

分 类 号：O633.2[理学—高分子化学]