A new TiO_(2) nanorods/MoTe_(2) quantum dots/Al_(2)O_(3) composite photocatalyst for efficient photoelectrochemical water splitting under simulated sunlight  

作　　者：Jie Meng Hongmei Liu Sainan Zhang Baogui Ye Min Feng Daoai Wang 

机构地区：[1]School of Chemistry and Chemical Engineering,Lanzhou Jiaotong University,Lanzhou 730000,China [2]State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China [3]Qingdao Centerof Resource Chemistry and New Materials,Qingdao 266100,China [4]Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai,Yantai 265503,China

出　　处：《Frontiers of Materials Science》2024年第2期61-74,共14页材料学前沿（英文版）

基　　金：The authors thank the National Natural Science Foundation of China(Grant Nos.52205230 and U21A2046);the Key Research and Development Program in Shandong Province(No.SYS202203);the Program for Taishan Scholars of Shandong Province(No.TS20190965);the Key Research Program of the Chinese Academy of Sciences(Grant No.ZDBS-ZRKJZ-TLCO10);the Western Light Project of CAS(xbzg-zdsys-202118);the Major Science and Technology Projects in Gansu Province(No.22ZD6GA002);the Major Program of the Lanzhou Institute of Chemical Physics,CAS(No.ZYFZFX-5)for providing financial support.

摘　　要：The solar-to-hydrogen conversion using the photoelectrochemical(PEC)method is a practical approach to producing clean energy.However,it relies on the availability of photocatalyst materials.In this work,a novel photocatalyst comprising molybdenum telluride quantum dots(MoTe_(2) QDs)-modified titanium dioxide nanorods(TiO_(2) NRs)was prepared for the enhancement of the PEC water splitting performance after combination with a Al_(2)O_(3) layer using the atomic layer deposition(ALD)technique.MoTe_(2) QDs were initially prepared,and then they were loaded onto TiO_(2) NRs using a warm water bath-based heating method.After a layer of Al_(2)O_(3) was deposited onto resulted TiO_(2) NRs/MoTe_(2) QDs,the composite TiO_(2) NRs/MoTe_(2) QDs/Al_(2)O_(3) was finally obtained.Under simulated sunlight(100 mW·cm^(-2)),such a composite exhibited a maximum photocurrent density of 2.25 mA·cm^(-2) at 1.23 V(versus RHE)and an incident photon-to-electron conversion efficiency of 69.88%at 380 nm,which are 4.33 and 6.66 times those of pure TiO_(2) NRs,respectively.Therefore,the composite photocatalyst fabricated in this work may have promising application in the field of PEC water splitting,solarcells andotherphotocatalyticdevices.

关 键 词：MoTe_(2)quantum dot TiO_(2)nanorod Al_(2)O_(3) atomic layer deposition PHOTOELECTROCHEMISTRY 

分 类 号：O646[理学—物理化学] TB383[理学—化学]