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Issue 27, 2013
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Controllable synthesis of silver cyanamide as a new semiconductor photocatalyst under visible-light irradiation

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Abstract

Semiconductor photocatalysis has attracted great interest as a promising strategy to achieve sustainable energy generation and realize environmental remediation. High-efficiency and visible-light-driven semiconductor photocatalysts have been pursued during the past decades to overcome the drawbacks of the widely-studied TiO2 photocatalyst. Here, we report a new n-type silver cyanamide (Ag2NCN) semiconductor with a direct band gap of about 2.30 eV, which can utilize visible-light for water photooxidation and organic contaminant decomposition. In order to investigate the optical, photocatalytic and photoelectrochemical properties, various aqueous solution methods are developed to synthesize Ag2NCN nanoparticles (<100 nm), microparticles (up to 20 μm) and nanograined (20 nm) thin films. It is found that the as-prepared nanoparticles exhibit unique absorption and photoluminescence properties. Nano/microparticles show high photocatalytic performance for organic dye degradation, indicating that Ag2NCN is an efficient visible-light-driven photocatalyst. Additionally, nanograined thin films can be assembled into a photoelectrochemical cell for water photooxidation and photocurrent generation. These findings have provided the first evidence that transition metal cyanamides may be promising functional materials for solar energy utilization.

Graphical abstract: Controllable synthesis of silver cyanamide as a new semiconductor photocatalyst under visible-light irradiation

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Supplementary files

Article information


Submitted
01 Mar 2013
Accepted
02 May 2013
First published
02 May 2013

J. Mater. Chem. A, 2013,1, 7942-7948
Article type
Paper

Controllable synthesis of silver cyanamide as a new semiconductor photocatalyst under visible-light irradiation

W. Zhao, Y. Liu, J. Liu, P. Chen, I. Chen, F. Huang and J. Lin, J. Mater. Chem. A, 2013, 1, 7942
DOI: 10.1039/C3TA10868F

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