Ag_(6)Si_(2)O_(7)/TiO_(2)复合光催化剂的制备及其对亚甲基蓝的降解性能  

Preparation of Ag_(6)Si_(2)O_(7)/TiO_(2)photocatalyst and its photocatalytic degradation of methylene blue

作　　者：蒋文雯 莫慧琳 樊婷玥 赵紫瑶 任煜[1,2] 王春霞 张伟 臧传锋[1,2] JIANG Wenwen;MO Huilin;FAN Tingyue;ZHAO Ziyao;REN Yu;WANG Chunxia;ZHANG Wei;ZANG Chuanfeng(School of Textile and Clothing, Nantong University, Nantong, Jiangsu 226019, China;National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, Nantong, Jiangsu 226019, China;College of Textiles and Clothing, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China)

机构地区：[1]南通大学纺织服装学院,江苏南通226019 [2]安全防护用特种纤维复合材料研发国家地方联合工程研究中心,江苏南通226019 [3]盐城工学院纺织服装学院,江苏盐城224051

出　　处：《纺织学报》2021年第4期107-113,共7页Journal of Textile Research

基　　金：国家自然科学基金项目(51703098);江苏省产学研合作项目(2018204);内蒙古自治区重大科技项目(zdzx2018060);国家级大学生创新创业训练计划项目(201910304058Z)。

摘　　要：为制备具有稳定性能的可见光催化剂,采用原位沉积法制得Ag_(6)Si_(2)O_(7)/TiO_(2)复合可见光催化剂。对光催化剂的表面形貌、结晶结构、化学元素组成和荧光光谱进行分析。在可见光照射下,以亚甲基蓝为有机污染物模型,探讨了TiO_(2)质量分数对复合光催化剂光催化降解效率的影响。结果表明:Ag_(6)Si_(2)O_(7)/TiO_(2)复合光催化剂中,Ag_(6)Si_(2)O_(7)均匀地包覆在TiO_(2)表面,二者以核壳结构形式紧密结合,且Ag、Si和Ti是以Ag^(+)、Si^(4+)和Ti^(4+)存在;与纯Ag_(6)Si_(2)O_(7)和纯TiO_(2)相比,Ag_(6)Si_(2)O_(7)/TiO_(2)光催化剂具有更高的可见光光催化活性;当TiO_(2)质量分数为20%时,对亚甲基蓝降解效果最佳,在20 min内降解率达到98.6%。这种新型高效复合可见光催化剂可用于处理印染废水,具有广阔的应用前景。In order to prepare visible light catalyst with stable performance,a novel highly efficient Ag_(6)Si_(2)O_(7)/TiO_(2)photocatalyst was prepared by an in-situ deposition method.The surface morphology,crystalline structure,chemical elemental composition and fluorescence spectrum of the photocatalyst were analyzed.The photocatalytic activity of the composite catalyst with different concentration of TiO_(2)were tested by degrading methylene blue(MB)under simulated visible light at room temperature.The results show that Ag_(6)Si_(2)O_(7)are coated on TiO_(2)uniformly,Ag_(6)Si_(2)O_(7)and TiO_(2)are tightly bonded in the form of core-shell structure,and Ag^(+),Si^(4+)and Ti^(4+)exist in composite catalyst.The results of photocatalytic degradation of MB show that the Ag_(6)Si_(2)O_(7)/TiO_(2)photocatalyst exhibits higher photocatalytic activity under visible light than Ag_(6)Si_(2)O_(7)and TiO_(2)used separately.When the mass fraction of TiO_(2)is 20%,the photocatalyst possesses the highest photocatalytic activity.The degradation efficiency for MB is up to 98.6%after irradiating in simulated solar for 20 min.The novel high-efficiency Ag_(6)Si_(2)O_(7)/TiO_(2)photocatalyst has a broad application prospect in treatment of printing and dyeing wastewater.

关 键 词：TiO_(2) 光催化剂 染料降解 亚甲基蓝 印染废水处理 

分 类 号：O643.36[理学—物理化学]