CdS quantum dots/Ti3+-TiO2 nanobelts heterojunctions as efficient visible-light-driven photocatalysts

Journal Article · Sun Jul 15 04:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2018.03.029· OSTI ID:22804058

Zhao, Tianyu; Xing, Zipeng; Xiu, Ziyuan ^[1]; Li, Zhenzi ^[2]; Shen, Liyan; Cao, Yan; Hu, Mengqiao; Yang, Shilin; Zhou, Wei ^[1]

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1. Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People’s Republic of China, Heilongjiang University, Harbin, 150080 (China)
2. Department of Epidemiology and Biostatistics, Harbin Medical University, Harbin, 150086 (China)

Highlights: • A novel CdS QDs/Ti{sup 3+}-TiO{sub 2} nanobelts heterojunction photocatalyst is prepared. • It narrows the bandgap and extends the photoresponse to visible light region. • It exhibits excellent visible-light-driven photocatalytic performance. • It is due to synergistic effect of CdS QDs, Ti{sup 3+} self-doping and heterojunction. - Abstract: CdS quantum dots (QDs)/Ti{sup 3+}-TiO{sub 2} nanobelts heterojunctions as 0D/1D architectures are fabricated through hydrothermal-chemical bath deposition combine with in-situ solid-state chemical reduction approach. The CdS QDs of ∼7 nm are loaded on TiO{sub 2} nanobelts with width of 50–300 nm and several micrometers long, and the heterojunctions are formed efficiently. The prepared heterojunctions exhibit excellent photocatalytic performance for complete removal of methylene blue (∼99%) and hydrogen production efficiency (∼480.6 μmol h{sup −1}) under visible light irradiation, which are as high as 2 and 23 times than that of pristine TiO{sub 2} nanobelts. The enhancement is attributed to the Ti{sup 3+} self-doping and CdS QDs extend the photoresponse to visible light region and the formation of heterojunctions favor the spatial separation of photogenerated charge carriers. Therefore, the high-efficient 0D/1D heterojunction composites have potential applications in the field of environment and energy.

• OSTI ID: 22804058
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 103; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
CADMIUM SULFIDES
CHARGE CARRIERS
DEPOSITION
DOPED MATERIALS
HETEROJUNCTIONS
HYDROGEN PRODUCTION
IRRADIATION
METHYLENE BLUE
PHOTOCATALYSIS
QUANTUM DOTS
TITANIUM IONS
TITANIUM OXIDES
VISIBLE RADIATION