坡缕石-In_(2)O_(3)/In_(2)S_(3)复合材料光催化降解甲基橙  

Photocatalytic degradation of Methyl Orange using palygorskite-In_(2)O_(3)/In_(2)S_(3)composite

作　　者：王涛 胡美凤 文娜 常玥[1,2,3] 查飞[1] WANG Tao;HU Meifeng;WEN Na;CHANG Yue;ZHA Fei(College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,Gansu,China;Key Laboratory of Eco-Functional Polymer Materials of the Ministry of Education,Lanzhou 730070,Gansu,China;Key Laboratory of Polymer Materials of Gansu Province,Lanzhou 730070,Gansu,China)

机构地区：[1]西北师范大学化学化工学院,甘肃兰州730070 [2]生态功能高分子材料教育部重点实验室,甘肃兰州730070 [3]甘肃省高分子材料重点实验室,甘肃兰州730070

出　　处：《精细化工》2024年第8期1824-1832,共9页Fine Chemicals

基　　金：国家自然科学基金项目(21865031)。

摘　　要：以In_(2)O_(3)、硫代乙酰胺、坡缕石(PGS)为原料,采用水热法制备了PGS负载In_(2)O_(3)/In_(2)S_(3)的复合材料(PGS-In_(2)O_(3)/In_(2)S_(3)),通过XRD、SEM、TEM、BET、紫外-可见漫反射光谱对PGS-In_(2)O_(3)/In_(2)S_(3)进行了表征,测试了其电化学交流阻抗谱(EIS),考察了不同酸化PGS质量分数(以酸化PGS和In_(2)O_(3)总质量计,下同)的PGS-In_(2)O_(3)/In_(2)S_(3)光催化降解甲基橙(MO)的性能、抗离子干扰和循环使用性能。结果表明,PGS-In_(2)O_(3)/In_(2)S_(3)的In_(2)O_(3)颗粒表面附着木耳状In_(2)S_(3)纳米片及针状PGS,其在200~580 nm区域有较强的光吸收。PGS质量分数为50%的50%PGS-In_(2)O_(3)/In_(2)S_(3)具有最佳的光催化降解MO活性,在可见光下照射30 min,20 mg50%PGS-In_(2)O_(3)/In_(2)S_(3)对30 m L质量浓度为20 mg/L的MO水溶液的光催化降解率为98.8%。超氧基自由基(·O_(2)^(-))、空穴(h^(+))是50%PGS-In_(2)O_(3)/In_(2)S_(3)光催化降解MO的主要活性物种,除H_(2)PO_(4)^(-)外,溶液中Cl^(-)、Na^(+)等常见离子对其光催化降解MO没有影响;50%PGS-In_(2)O_(3)/In_(2)S_(3)对孔雀石绿、罗丹明B、结晶紫、亚甲基蓝等染料均表现出较好的物理吸附和光催化降解效果。PGS与In_(2)O_(3)/In_(2)S_(3)间的内置电场降低了In_(2)O_(3)/In_(2)S_(3)光生载流子的复合率。Palygorskite(PGS)supported In_(2)O_(3)/In_(2)S_(3)composites(PGS-In_(2)O_(3)/In_(2)S_(3))were prepared from hydrothermal reaction of In_(2)O_(3),thioacetamide and PGS,characterized by XRD,SEM,TEM,BET and UV-Vis DSR,and evaluated for its electrochemical impedance spectroscopy(EIS).The photocatalytic performance,ion interference resistance and cycling performance of PGS-In_(2)O_(3)/In_(2)S_(3)with different acid-PGS mass fractions(based on the total mass of acid-PGS and In_(2)O_(3),the same below)were studied in Methyl Orange(MO)degradation.The results indicated that PGS-In_(2)O_(3)/In_(2)S_(3)exhibited a structure with the agaric-like nanosheets of In_(2)S_(3)and needle-like palygorskite attaching to the surface of particles In_(2)O_(3),and showed stronger light absorption in the range of 200~580 nm.50%PGS-In_(2)O_(3)/In_(2)S_(3)composite with acid-PGS mass fraction of 50%displayed the highest photocatalytic activity in MO degradation,and MO with a mass concentration of 20 mg/L showed a degradation rate of 98.8%photocatalyzed by 20 mg 50%PGS-In_(2)O_(3)/In_(2)S_(3)for 30 min under visible light,with the main active species involved attributed to superoxide radical and hole while the common ions such as Na^(+)and Cl^(-),except H_(2)PO_(4)^(-),showing no effect.Moreover,50%PGS-In_(2)O_(3)/In_(2)S_(3)showed better physical adsorption and photocatalytic degradation for various dyes including Malachite Green,Rhodamine B,Crystal Violet and Methylene Blue.The internal electric field between PGS and In_(2)O_(3)/In_(2)S_(3)reduced the recombination rate of In_(2)O_(3)/In_(2)S_(3)photogenerated carriers.

关 键 词：In_(2)O_(3)/In_(2)S_(3) 坡缕石 光催化剂 光降解 染料 水处理技术 

分 类 号：O643.36[理学—物理化学] X703[理学—化学]