title: Enhanced photocatalytic activity of ZnO microspheres via hybridization with CuInSe₂ and CuInS₂ nanocrystals.
abstract: ZnO microspheres sensitized by CuInSe(2) and CuInS(2) nanoparticles, which were synthesized by a solvothermal method and have a size about 20 and 3.5 nm, respectively, were used to a photodegradation of rhodamine B under an irradiation of mercury lamp. Results show that the photocatalytic activities of the ZnO/CuInSe(2) and the ZnO/CuInS(2) are much higher than that of the ZnO microspheres because of a formation of the heterojunction in two systems. It is also noted that the ZnO/CuInS(2) exhibits a higher photocatalytic activity than the ZnO/CuInSe(2), which is probably related to more suitable band gap to sunlight for CuInS(2) nanocrystals and the larger specific surface due to a small size. Particularly, the ZnO/CuInSe(2)/CuInS(2) shows the highest photocatalytic activities in all measured photocatalysts, which should be attributed to the formation of double heterojunctions among ZnO, CuInSe(2), and CuInS(2).
authors: Electronic Materials Research Laboratory, International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, People's Republic of China.
authors: Fengyu
authors: F
authors: Shen
authors: Wenxiu
authors: W
authors: Que
authors: Yucheng
authors: Y
authors: He
authors: Yuan
authors: Y
authors: Yuan
authors: Xingtian
authors: X
authors: Yin
authors: Gangfeng
authors: G
authors: Wang
mesh_terms: D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D004563:Electrochemistry / Q000379:methods; D007204:Indium / Q000737:chemistry*; D008863:Microspheres; D053758:Nanoparticles / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods; D010777:Photochemistry / Q000379:methods*; D010782:Photolysis; D012235:Rhodamines / Q000737:chemistry; D018036:Selenium Compounds / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*; D013997:Time Factors; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: D012235:Rhodamines; D018036:Selenium Compounds; D013440:Sulfides; D007204:Indium; D003300:Copper; C029773:rhodamine B; D015034:Zinc Oxide