Construction of sugar-gourd-shaped CdS/Co1-xS hollow hetero-nanostructure as an efficient Z-scheme photocatalyst for hydrogen generation

被引:94
作者
Li, Lei [1 ]
Guo, Changfa [1 ]
Shen, Junling [1 ]
Ning, Jiqiang [2 ]
Zhong, Yijun [1 ]
Hu, Yong [1 ]
机构
[1] Zhejiang Normal Univ, Dept Chem, Minist Educ Adv Catalysis Mat, Key Lab, Jinhua 321004, Peoples R China
[2] Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Vacuum Interconnected Nanotech Workstn, Suzhou 215123, Peoples R China
基金
中国国家自然科学基金;
关键词
CdS; Co1-xS; Co vacancies; Z-scheme system; Photocatalytic H-2 production; CHARGE SEPARATION; METAL-OXIDES; WATER; NANOSHEETS; TIO2; NANOCOMPOSITES; COCATALYST; CRYSTALS; HYBRID;
D O I
10.1016/j.cej.2020.125925
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Hollow hetero-nanostructures have unique advantages for energy storage and conversion and are highly desirable for their photocatalysis applications. We herein report the synthesis of an unusual sugar-gourd-shaped hollow hetero-nanostructure, Co1-xS hollow polyhedrons (HPs) skewered on CdS nanowires (NWs) (CdS/Co1-xS HHNSs), through a facile two-step strategy of growing ZIF-67 on CdS NWs followed by a sulfidation reaction. The loading amounts of Co1-xS HPs on an individual CdS NW can be adjusted by simply controlling the content of the Co1-xS precursor in the reaction. The coupling of the Co1-xS HPs with the CdS NWs not only broadens the solar light harvesting spectrum from ultraviolet to near infrared region, but also results in abundant Co vacancies as well as sides and facets with lots of active sites. More importantly, in-situ irradiated X-ray photoelectron spectroscopy confirms the direct Z-scheme transfer pathway of photogenerated charge carriers in the heteronanostructure, which facilitates the separation of photogenerated electron-hole pairs and induces strong photoreduction ability due to lower aligned conductor band of Co1-xS. As a result, the gular-gourd-shaped CdS/Co1-xS HHNSs are demonstrated as an efficient visible light-driven photocatalyst for H-2 production. A H-2 production rate of 13.48 mmol g(-1) h(-1) is achieved with optimized CdS/Co1-xS HHNSs without using any additional co catalyst. This is the first report on the performance of Co vacancies in Co1-xS hollow nanostructures for photocatalysis which inspire the development of unusual hollow hetero-nanostructures as efficient photocatalysts by means of morphology design and interfacial electronic modulation.
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页数:9
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共 45 条
[1]   In Situ Grown Monolayer N-Doped Graphene on CdS Hollow Spheres with Seamless Contact for Photocatalytic CO2 Reduction [J].
Bie, Chuanbiao ;
Zhu, Bicheng ;
Xu, Feiyan ;
Zhang, Liuyang ;
Yu, Jiaguo .
ADVANCED MATERIALS, 2019, 31 (42)
[2]   Oxygen-incorporation in Co2P as a non-noble metal cocatalyst to enhance photocatalysis for reducing water to H2 under visible light [J].
Chao, Yuguang ;
Zheng, Jianfeng ;
Zhang, Haixia ;
Li, Feng ;
Yan, Feng ;
Tan, Yisheng ;
Zhu, Zhenping .
CHEMICAL ENGINEERING JOURNAL, 2018, 346 :281-288
[3]   Hierarchical nanostructures of metal oxides for enhancing charge separation and transport in photoelectrochemical solar energy conversion systems [J].
Chen, Haining ;
Yang, Shihe .
NANOSCALE HORIZONS, 2016, 1 (02) :96-108
[4]   Nano-architecture and material designs for water splitting photoelectrodes [J].
Chen, Hao Ming ;
Chen, Chih Kai ;
Liu, Ru-Shi ;
Zhang, Lei ;
Zhang, Jiujun ;
Wilkinson, David P. .
CHEMICAL SOCIETY REVIEWS, 2012, 41 (17) :5654-5671
[5]   Three-dimensional porous g-C3N4 for highly efficient photocatalytic overall water splitting [J].
Chen, Xianjie ;
Shi, Run ;
Chen, Qian ;
Zhang, Zijian ;
Jiang, Wenjun ;
Zhu, Yongfa ;
Zhang, Tierui .
NANO ENERGY, 2019, 59 :644-650
[6]   Ultrafine Co1-xS nanoparticles embedded in a nitrogen-doped porous carbon hollow nanosphere composite as an anode for superb sodium-ion batteries and lithium-ion batteries [J].
Dong, Caifu ;
Guo, Lijun ;
He, Yanyan ;
Shang, Limei ;
Qian, Yitai ;
Xu, Liqiang .
NANOSCALE, 2018, 10 (06) :2804-2811
[7]   Hierarchical Nanostructures: Design for Sustainable Water Splitting [J].
Fang, Ming ;
Dong, Guofa ;
Wei, Renjie ;
Ho, Johnny C. .
ADVANCED ENERGY MATERIALS, 2017, 7 (23)
[8]   ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE [J].
FUJISHIMA, A ;
HONDA, K .
NATURE, 1972, 238 (5358) :37-+
[9]   A new photocatalyst based on Co(CO3)0.5(OH)•0.11H2O/Bi2WO6 nanocomposites for high-efficiency cocatalyst-free O2 evolution [J].
He, Bin ;
Liu, Huanhuan ;
Lin, Zheng ;
Yan, Lei ;
Ning, Jiqiang ;
Zhong, Yijun ;
Zheng, Changcheng ;
Zhang, Ziyang ;
Hu, Yong .
CHEMICAL ENGINEERING JOURNAL, 2019, 359 :924-932
[10]   One-Step Solvothermal Synthesis of Petalous Carbon-Coated Cu+-Doped CdS Nanocomposites with Enhanced Photocatalytic Hydrogen Production [J].
He, Bin ;
Liu, Ren ;
Ren, Jiabin ;
Tang, Caijian ;
Zhong, Yijun ;
Hu, Yong .
LANGMUIR, 2017, 33 (27) :6719-6726