Development of high quantum efficiency CdS/ZnS core/shell structured photocatalyst for the enhanced solar hydrogen evolution

被引：45

作者：

Reddy, Nagappagari Lakshmana ^{[1
]}

Rao, Vempuluru Navakoteswara ^{[1
]}

Kumari, Murikinati Mamatha ^{[1
]}

Sathish, Marappan ^{[2
]}

Venkatakrishnan, Shankar Muthukonda ^{[1
]}

机构：

[1] Yogi Vemana Univ, Dept Mat Sci & Nanotechnol, Nanocatalysis & Solar Fuels Res Lab, Kadapa 516005, Andhra Pradesh, India

[2] CECRI, CSIR, Cent Electrochem Res Inst, Funct Mat Div, Karaikkudi 630003, Tamil Nadu, India

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2018年 / 43卷 / 49期

关键词：

Hydrogen production; Photocatalysis; Core/shell structures; Hydrothermal synthesis; VISIBLE-LIGHT-DRIVEN; SHELL NANOPARTICLES; FACILE SYNTHESIS; TIO2; NANOTUBES; H-2; PRODUCTION; CDS NANORODS; IN-SITU; WATER; GRAPHENE; HYBRID;

D O I：

10.1016/j.ijhydene.2018.10.054

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Development of co-catalyst free, core/shell structured photocatalyst with ultra-thin shell is of great importance towards the stable and continuous hydrogen (H-2) production, where the shell prevents photo-corrosion of the core for longer stability with continuous H-2 generation. Accordingly, herein, we report a one-step, surfactant free hydrothermal process for synthesis of high-efficient CdS/ZnS core/shell structured catalyst for H-2 evolution under natural solar light. The structural and morphological characterizations using XRD and TEM techniques revealed the formation of phase pure CdS/ZnS system, with core and shell thickness of 395 and 15 nm, respectively. XPS studies revealed that the constituted elements in system exist in their native oxidation states, which indicated the stable structural integrity of the individual phase in the core/shell structure. The synergistic optical properties of CdS/ZnS showed the absorption edge around 500 nm and the decreased PL intensity indicated the improved charge recombination resistance in the system. The parametric studies such as synthesis time, core diameters and shell thickness optimization were conducted to study the formation kinetics of the core/shell structure and their photocatalytic efficiencies. Accordingly, the optimized core/shell catalyst showed around 763 and 2.4 folds superior activity when compared to the pristine CdS and ZnS, respectively. Further, the catalyst showed excellent stability for over 100 h with quantum efficiency of 8.78% under the irradiation of 20 W LED light at 420 nm. Based on the obtained results, the observed improved photocatalytic quantum efficiency could be ascribed to their synergistic effects of CdS and ZnS towards increased charge separation and spatial distributions of the carriers due to their core/shell configuration of the materials. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：22315 / 22328

页数：14

共 62 条

[1] Efficient hydrogen production by composite photocatalyst CdS-ZnS/Zirconium-titanium phosphate (ZTP) under visible light illumination [J].

Biswal, Niranjan ;

Das, D. P. ;

Martha, Satyabadi ;

Parida, K. M. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2011, 36 (21) :13452-13460

[2] Fluorometric selective detection of fluoride ions in aqueous media using Ag doped CdS/ZnS core/shell nanoparticles [J].

Boxi, Siddhartha Sankar ;

Paria, Santanu .

DALTON TRANSACTIONS, 2016, 45 (02) :811-819

[3]

BUHLER N, 1984, J PHYS CHEM-US, V88, P3261, DOI 10.1021/j150659a025

[4] Core/Shell Nanoparticles: Classes, Properties, Synthesis Mechanisms, Characterization, and Applications [J].

Chaudhuri, Rajib Ghosh ;

Paria, Santanu .

CHEMICAL REVIEWS, 2012, 112 (04) :2373-2433

[5] In situ photodeposition of NiOx on CdS for hydrogen production under visible light: Enhanced activity by controlling solution environment [J].

Chen, Xiaoping ;

Chen, Wei ;

Gao, Hanyang ;

Yang, Yu ;

Shangguan, Wenfeng .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2014, 152 :68-72

[6] Hydrogen production from water splitting on CdS-based photocatalysts using solar light [J].

Chen X. ;

Shangguan W. .

Frontiers in Energy, 2013, 7 (1) :111-118

[7] Photocatalytic hydrogen production of the CdS/TiO2-WO3 ternary hybrid under visible light irradiation [J].

Chen, Yi-Lin ;

Lo, Shang-Lien ;

Chang, Hsiang-Ling ;

Yeh, Hsiao-Mei ;

Sun, Liping ;

Oiu, Chunsheng .

WATER SCIENCE AND TECHNOLOGY, 2016, 73 (07) :1667-1672

[8] TiO2 nanotubes coupled with nano-Cu(OH)2 for highly efficient photocatalytic hydrogen production [J].

Dang, Haifeng ;

Dong, Xinfa ;

Dong, Yingchao ;

Zhang, Yan ;

Hampshire, Stuart .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2013, 38 (05) :2126-2135

[9] Synthesis and optical and electrical properties of CdS/ZnS Core/Shell nanorods [J].

Datta, Anuja ;

Panda, Subhendu K. ;

Chaudhuri, Subhadra .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (46) :17260-17264

[10] Interfacial and physico-chemical properties of polymer-supported CdS•ZnS nanocomposites and their role in the visible-light mediated photocatalytic splitting of water [J].

Deshpande, Aparna ;

Shah, Pallavi ;

Gholap, R. S. ;

Gupta, Narendra M. .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2009, 333 (01) :263-268

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