沉淀煅烧法合成(CuAg)0.15In0.3Zn1.4S2光催化剂及可见光下的制氢性能  

Photocatalytic hydrogen production under visible-light irradiation on (CuAg)_(0.15)In_(0.3)Zn_(1.4 )S_2 synthesized by precipitation and calcination

作　　者：张广山[1,2] 张文[3] John C.Crittenden 陈勇生[2] Daisuke Minakata 王鹏[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院 城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090 [2]佐治亚理工学院土木与环境工程学院,美国亚特兰大30332 [3]新泽西理工学院土木与环境工程系,美国纽瓦克07102 [4]佐治亚理工学院布鲁克贝尔可持续性发展学院,美国亚特兰大30332 [5]密歇根理工大学土木与环境工程系,美国霍顿49931

出　　处：《催化学报》2013年第10期1926-1935,共10页

基　　金：美国佐治亚理工学院布鲁克贝尔可持续性发展学院,Hightower Chair和Georgia Research Alliance;国家自然科学基金委员会创新研究群体科学基金(51121062)~~

摘　　要：研究了沉淀煅烧法制备的纳米级(CuAg)0.15In0.3Zn1.4S2光催化剂以及产氢效率,并采用X射线衍射、透射电镜、扫描电镜、N2吸附-脱附、紫外-可见吸收光谱等手段对催化剂进行了表征.结果表明,(CuAg)0.15In0.3Zn1.4S2的结晶度、比表面积和吸收可见光能力与煅烧温度和煅烧时间有关.在可见光下,以KI为电子给体,考察了不同条件对光催化产氢能力的影响.发现在600℃煅烧5 h时所制的(CuAg)0.15In0.3Zn1.4S2光催化剂产氢活性最高,产氢速率为1750μmol g-1h-1,量子效率在420±5 nm达到12.8%,比未煅烧催化剂的光催化活性提高了约6倍.This study investigates the photocatalytic hydrogen production over nanosized(CuAg)0.15 In0.3 Zn1.4 S2 photocatalysts prepared via precipitation and calcination.The photocatalysts were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, N2 adsorption-desorption,and UV-Vis absorption spectroscopy.The results show that calcination temperature and time significantly influence the crystallinity,specific surface area,and visible-light absorption capacity of the photocatalysts.The photocatalyst activity was studied under visible-light irradiation with KI as the electron donor.The results indicate that the(CuAg)0.15 In0.3 Zn1.4 S2 photocatalyst prepared at a calcination temperature of 600℃ for 5 h yields the highest photocatalytic activity(H2 production rate of 1750 μmol g-1h-1 and quantum yield of 12.8% at 420 ± 5 nm),approximately 6 times larger than that of catalysts prepared without thermal treatment.

关 键 词：光催化剂 多金属复合硫化物 制氢 煅烧 光催化活性 可见光 

分 类 号：O643.36[理学—物理化学]