LaCoO_(3)钙钛矿型催化剂的制备及其光催化降解酸性品红和碱性品红的研究  

Preparation of LaCoO_(3) Perovskite Catalyst and its Photocatalytic Degradation of Acid Fuchsin and Basic Fuchsin

作　　者：王潇潇[1] 郭世龙 牛紫嫣 张业祥 芦兴程 田雁 李一衡 胡馨雨 武兆虹 刘振民[1] 卫贤贤[3,1] 张懿营 WANG Xiao-xiao;GUO Shi-long;NIU Zi-Yan;ZHANG Ye-xiang;LU Xing-cheng;TIAN Yan;LI Yi-heng;HU Xin-yu;WU Zhao-hong;LIU Zhen-min;WEI Xian-xian;ZHANG Yi-ying(College of Chemical Engineering and Technology,Shanxi Key Laboratory of High Value Utilization of Coal Gangue,Taiyuan University of Science and Technology,Taiyuan 030024,China;Wuxi AppTec(Tianjin)Co.,Ltd.,Tianjin 300457,China;School of Environment and Resources,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学化学工程与技术学院煤矸石高值利用山西省重点实验室,山西太原030024 [2]天津药明康德新药开发有限公司,天津300457 [3]太原科技大学环境与资源学院,山西太原030024

出　　处：《分子催化（中英文）》2024年第1期71-80,I0003,I0004,共12页Journal of Molecular Catalysis(China)

基　　金：山西省基础研究计划(青年科学研究项目)(202103021223294,201901D211584);山西省基础研究计划(面上项目)(202203021211203);山西省重点研发计划项目(201903D121025);山西省重点研发计划(能源与节能环保领域)项目(202102090301026);山西省研究生优秀创新项目(2022Y707);山西省高等学校大学生创新创业训练计划项目(20230684,20230685,20230686)。

摘　　要：以硝酸钴、硝酸镧及柠檬酸为原料,在水热体系中采用水热合成法合成出一系列的钙钛矿型催化剂LaCoO_(3),考察当焙烧温度不同时,所合成催化剂的物化性质和降解酸性品红和碱性品红的光催化性能,并分析了催化剂降解品红的降解机理.实验结果表明,采用水热合成法能够成功合成出钙钛矿型催化剂LaCoO_(3),随着焙烧温度的升高,催化剂的颗粒尺寸逐渐增大,结晶度则呈现先升高后降低的趋势.与此同时,比表面积、孔径和孔体积则逐渐减小.另外通过光催化降解品红来测试催化剂的光催化性能,结果表明LaCoO_(3)对酸性品红和碱性品红都具有很好的光催化活性,但对酸性品红的降解率高于碱性品红,这可能与不同品红的结构或者溶液的酸碱性有关.LaCoO_(3) perovskite catalysts with different roasting temperatures are synthesized through hydrothermal method by using cobalt nitrate,lanthanum nitrate and citric acid as raw materials.When the roasting temperature is different,the physicochemical properties of the catalysts and the photocatalytic degradation reaction of acid fuchsin and basic fuchsin over the catalysts have investigated,and the photocatalytic degradation mechanism is also explored.The experimental results shows that LaCoO_(3) perovskite catalysts could be synthesized using hydrothermal method,and with the increase of roasting temperature,the particle sizes of LaCoO_(3) catalysts increase,the crystallinity of catalysts increase and decrease after a period of time,but specific surface area,pore diameter and pore volume decease.The photocatalytic performances of LaCoO_(3) perovskite catalysts have been evaluated by photocatalytic degradation of fuchsin and the experimental results show that LaCoO3 perovskite catalysts exhibit excellent photocatalytic activity for both acid fuchsin and basic fuchsin,but the degradation rate of acid fuchsin was higher than that of basic fuchsin,which may have to do with the structure,the acidity and basicity of acid fuchsin and basic fuchsin.

关 键 词：钙钛矿催化剂 光催化 品红 降解机理 

分 类 号：O64.32[理学—物理化学]