溶液pH对二维层状氧化物偏锑酸钡光催化降解酸性橙的影响研究  

Influence of pH on photodegradation of acid orange by 2D layered oxide BaSbO

作　　者：张涛 沈金凤 王怡涵 叶芊 李园园 杨顶峰 Zhang Tao;Shen Jinfeng;Wang Yihan;Ye Qian;Li Yuanyuan;Yang Dingfeng(College of Biological and Chemical Engineering,Chongqing University of Education,Chongqing 400067;Henan Academy of Agricultural Sciences,Zhengzhou 450002;College of Chemistry and Chemical Engineering,Chongqing University of Technology,Chongqing 400054)

机构地区：[1]重庆第二师范学院生物与化学工程学院,重庆400067 [2]河南省农业科学院,郑州450002 [3]重庆理工大学化学化工学院,重庆400054

出　　处：《化工新型材料》2021年第5期205-209,共5页New Chemical Materials

基　　金：重庆市教委科学技术研究项目(KJQN201901618和KJQN202001613);重庆市科委基金项目(基础研究与前沿探索)(cstc2017jcyjAX0258);重庆英才创新创业示范团队(CQYC201903178);教育部学校规划建设发展中心重庆第二师范学院儿童研究院重点项目(CRIKT201909);重庆第二师范学院大学生科研项目(KY20200138和KY20200139)。

摘　　要：采用高温固相法制备二维层状氧化物偏锑酸钡(BaSb_(2)O_(6)),并将其用于在不同pH(pH=2、4、6)条件下光催化降解酸性橙溶液的研究。通过粉末X射线多晶衍射和红外反射光谱对其进行结构表征。光催化降解实验表明,当溶液pH=2时,BaSb_(2)O_(6)对酸性橙溶液的降解率达到最大,其降解率在120min内达到88%。活性自由基捕获实验发现超氧自由基负离子(·O_(2)^(-))是氧化降解酸性橙的主要活性物种。进一步进行循环实验,发现在酸性条件下BaSb_(2)O_(6)具有较高的光催化和结构稳定性。2D layered oxide barium metaantimonate(BaSb_(2)O_(6))was prepared by conventional solid-state method and applied for photodegradation of acid orange under the effect of pH(pH=2,4,6).The crystal structure was characterized by powder X-ray diffraction and infrared reflectance spectrum.The results of photocatalytic performance demonstrated that the maximum photodegradation rate reached 88%within 120min under UV light irradiation at pH=2.The trapping experiment indicated that superoxide anion(·O_(2)^(-))was the dominant active specie in the process of photodegradation.Furthermore,the cycling running manifested that BaSb_(2)O_(6)embraced stable photocatalytic activity and structural stability under acidic condition.

关 键 词：偏锑酸钡 锑酸盐材料 光催化 紫外光 酸性橙 PH 

分 类 号：O61[理学—无机化学]