Fabrication and efficient photocatalytic activity of porous CdS-pillared tetratitanate nanohybrid

Journal Article · Mon Dec 15 04:00:00 EST 2014 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2014.09.026· OSTI ID:22420693

Zhang, Yaping ^[1]; Liu, Hong; Zhang, Guohua; He, Liwen; Liu, Peide ^[1]; Lin, Bizhou ^[1]

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1. College of Materials Science and Engineering, Huaqiao University, Xiamen 361021 (China)

Highlights: • Heterostructured CdS–H{sub 2}Ti{sub 4}O{sub 9} nanohybrid exhibits a wide spectral response. • The nanohybrid gave a H{sub 2} evolution rate of 895 μmol h{sup –1} g{sup –1} in water splitting. • The electronic coupling was evidenced by XPS and photocurrent results. - Abstract: Heterostructured CdS-pillared tetratitanate nanohybrid was fabricated by electrostatically driven self-assembly of the exfoliated tetratitanate nanosheets and CdS nanosol particles. It was revealed that the present nanohybrid is porous with a specific surface area of 65 m{sup 2} g{sup −1} and that the tetratitanate nanosheets were restacked in a well-ordered arrangement with a gallery height of 2.3 nm. The formation of an electronic coupling between the titanate nanosheets and the encapsulated CdS pillars was supported by XPS and photocurrent measurements. The nanohybrid exhibits a highly photocatalytic activity of 895 μmol h{sup −1} g{sup −1} in H{sub 2} evolution from water splitting under 300 W Xe lamp irradiation, which is about 11 and 7 times higher than its parents H{sub 2}Ti{sub 4}O{sub 9}·H{sub 2}O and CdS, respectively. Loading 3 wt% Pt resulted in that its activity was further improved to 1897 μmol h{sup −1} g{sup −1}. It was showed that the as-prepared nanohybrid has an excellent stability and recurrence performance in hydrogen generation.

• OSTI ID: 22420693
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 60; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CADMIUM SULFIDES
CLATHRATES
COUPLING
INTERSTITIAL HYDROGEN GENERATION
IRRADIATION
LOADING
NANOSTRUCTURES
PHOTOCATALYSIS
POROUS MATERIALS
SPECIFIC SURFACE AREA
SPECTRAL RESPONSE
TITANATES
WATER
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY