Synthesis of cuboid BiOCl nanosheets coupled with CdS quantum dots by region-selective deposition process with enhanced photocatalytic activity

Journal Article · Sun Jul 15 00:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2018.03.043· OSTI ID:22804066

Pan, Jinbo; Liu, Jianjun; Zuo, Shengli; Khan, Usman Ali; Yu, Yingchun; Li, Baoshan ^[1]

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1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029 (China)

Highlights: • Region-selective deposition process was adopted to prepare high-dispersed CdS QDs/BiOCl nanocomposites consisting of cuboid BiOCl nanosheets exposing (001) facet and CdS QDs with size of 5–10 nm. • The TGA was used as bridge linked the CdS QDs and BiOCl, which enables CdS QDs spread homogeneously on the (001) facet of BiOCl. • The optical absorption properties and charge transfer efficiency of CdS QDs/BiOCl nanocomposites are much improved owing to the widespread heterojunction between CdS QDs and BiOCl. • The photocatalytic degradation activities of CdS QDs/BiOCl composites are excellent for MO dyes and phenol contaminants under simulated solar and UV light, respectively. - Abstract: A facile region-selective deposition process was adopted to prepare high-dispersed CdS QDs on BiOCl nanosheets with the surface modification of thioglycollic acid (TGA). The samples were systematically characterized by XRD, SEM, TEM, HRTEM, EDS, XPS, UV–vis DRS, EIS and PL. The results indicate that CdS QDs with size of 5–10 nm dispersed uniformly on the surface of cuboid BiOCl nanosheets. The photocatalytic performance tests reveal that the CdS QDs-3%/BiOCl composite exhibits an excellent photocatalytic activity, which is over 4.0 and 4.8 times as high as pure BiOCl for methyl orange (MO) and phenol photodegradation rate under simulated solar light and UV light illumination, respectively. The enhanced photocatalytic performance of the CdS QDs/BiOCl composites should be attributed to the improved visible light absorption and the high migration efficiency of the photogenerated electron-holes due to the matched band gap and the widespread heterostructure between CdS QDs and BiOCl.

• OSTI ID: 22804066
• Journal Information: Materials Research Bulletin, Vol. 103; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
BISMUTH COMPOUNDS
CADMIUM SULFIDES
DEPOSITION
HETEROJUNCTIONS
ILLUMINANCE
METHYL ORANGE
NANOCOMPOSITES
OXYCHLORIDES
PHENOL
PHOTOCATALYSIS
QUANTUM DOTS
SCANNING ELECTRON MICROSCOPY
SOLAR RADIATION
SYNTHESIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSMISSION ELECTRON MICROSCOPY
ULTRAVIOLET RADIATION
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY