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坡缕石-In2O3/In2S3复合材料光催化降解甲基橙

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以 In2O3、硫代乙酰胺、坡缕石(PGS)为原料,采用水热法制备了 PGS 负载 In2O3/In2S3 的复合材料(PGS-In2O3/In2S3),通过XRD、SEM、TEM、BET、紫外-可见漫反射光谱对PGS-In2O3/In2S3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In2O3 总质量计,下同)的PGS-In2O3/In2S3 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-In2O3/In2S3 的In2O3 颗粒表面附着木耳状In2S3 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-In2O3/In2S3 具有最佳的光催化降解MO活性,在可见光下照射 30 min,20 mg 50%PGS-In2O3/In2S3 对 30 mL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(·O2-)、空穴(h+)是 50%PGS-In2O3/In2S3 光催化降解MO的主要活性物种,除H2PO4-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-In2O3/In2S3 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 In2O3/In2S3 间的内置电场降低了 In2O3/In2S3光生载流子的复合率.
Photocatalytic degradation of Methyl Orange using palygorskite-In2O3/In2S3 composite
Palygorskite(PGS)supported In2O3/In2S3 composites(PGS-In2O3/In2S3)were prepared from hydrothermal reaction of In2O3,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-In2O3/In2S3 with different acid-PGS mass fractions(based on the total mass of acid-PGS and In2O3,the same below)were studied in Methyl Orange(MO)degradation.The results indicated that PGS-In2O3/In2S3 exhibited a structure with the agaric-like nanosheets of In2S3 and needle-like palygorskite attaching to the surface of particles In2O3,and showed stronger light absorption in the range of 200~580 nm.50%PGS-In2O3/In2S3 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-In2O3/In2S3 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 H2PO4-,showing no effect.Moreover,50%PGS-In2O3/In2S3 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 In2O3/In2S3 reduced the recombination rate of In2O3/In2S3 photogenerated carriers.

In2O3/In2S3palygorskitephotocatalystsphotodegradationdyeswater treatment technology

王涛、胡美凤、文娜、常玥、查飞

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西北师范大学 化学化工学院,甘肃 兰州 730070

生态功能高分子材料教育部重点实验室,甘肃 兰州 730070

甘肃省高分子材料重点实验室,甘肃 兰州 730070

In2O3/In2S3 坡缕石 光催化剂 光降解 染料 水处理技术

国家自然科学基金项目

21865031

2024

精细化工
大连化工研究院设计院 中国化工学会精细化工专业委员会 辽宁省化工研究院

精细化工

CSTPCD北大核心
影响因子:0.557
ISSN:1003-5214
年,卷(期):2024.41(8)
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