title: Synthesis of ZnO/Si Hierarchical Nanowire Arrays for Photocatalyst Application.
abstract: ZnO/Si nanowire arrays with hierarchical architecture were synthesized by solution method with ZnO seed layer grown by atomic layer deposition and magnetron sputtering, respectively. The photocatalytic activity of the as-grown tree-like arrays was evaluated by the degradation of methylene blue under ultraviolet light at ambient temperature. The comparison of morphology, crystal structure, optical properties, and photocatalysis efficiency of the two samples in different seeding processes was conducted. It was found that the ZnO/Si nanowire arrays presented a larger surface area with better crystalline and more uniform ZnO branches on the whole sidewall of Si backbones for the seed layer by atomic layer deposition, which gained a strong light absorption as high as 98% in the ultraviolet and visible range. The samples were proven to have a potential use in photocatalyst, but suffered from photodissolution and memory effect. The mechanism of the photocatalysis was analyzed, and the stability and recycling ability were also evaluated and enhanced.
authors.affiliation: Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China.
authors.forename: Dingguo
authors.initials: D
authors.lastname: Li
authors.affiliation: Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China.
authors.forename: Xiaolan
authors.initials: X
authors.lastname: Yan
authors.affiliation: Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR, 72701, USA.
authors.forename: Chunhua
authors.initials: C
authors.lastname: Lin
authors.affiliation: Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China. huangsl@xmu.edu.cn.|Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR, 72701, USA. huangsl@xmu.edu.cn.|State Key Lab of Silicon Materials, Zhejiang University, Hangzhou, 310027, China. huangsl@xmu.edu.cn.|Fujian Provincial Key Laboratory of Eco-Industrial Green Technology, Wuyi University, Fujian, 354300, China. huangsl@xmu.edu.cn.
authors.forename: Shengli
authors.initials: S
authors.lastname: Huang
authors.affiliation: Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR, 72701, USA.
authors.forename: Z Ryan
authors.initials: ZR
authors.lastname: Tian
authors.affiliation: Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China.
authors.forename: Bing
authors.initials: B
authors.lastname: He
authors.affiliation: Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China.
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Yang
authors.affiliation: Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China.|State Key Lab of Silicon Materials, Zhejiang University, Hangzhou, 310027, China.|Fujian Provincial Key Laboratory of Eco-Industrial Green Technology, Wuyi University, Fujian, 354300, China.
authors.forename: Binbin
authors.initials: B
authors.lastname: Yu
authors.affiliation: Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China.
authors.forename: Xu
authors.initials: X
authors.lastname: He
authors.affiliation: Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.affiliation: Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China.
authors.forename: Jiayuan
authors.initials: J
authors.lastname: Wang
authors.affiliation: Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China.
authors.forename: Huahan
authors.initials: H
authors.lastname: Zhan
authors.affiliation: Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China.
authors.forename: Shuping
authors.initials: S
authors.lastname: Li
authors.affiliation: Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China.
authors.forename: Junyong
authors.initials: J
authors.lastname: Kang
keywords: Hierarchical architecture; Nanowire arrays; Photocatalytic activity; Semiconductor