Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 257, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.117932
Keywords
In2O3/In2S3 heterostructures; Microsphere; Photocatalytic nitrogen fixation
Funding
- Natural Science Foundation of China [21878031]
- Liaoning Province Natural Science Foundation [20180550770]
- LiaoNing Revitalization Talents Program [XLYC1802124]
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The synthesis of a novel In2O3/In2S3 microsphere heterostructures is conducted through a well-designed two-step hydrothermal method. These composites are first applied for efficient fixation of N-2 to NH3 under mild conditions without any organic scavengers and precious-metal cocatalysts. Here the In2S3 flakes are in situ generated and uniformly assembled on In2O3 microsphere. The phase structures, morphologies and oxygen vacancies of the samples are systematically characterized by X-ray powder diffraction (XRD), field-emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse-reflectance spectroscopy (DRS), and photoluminescence spectroscopy (PL), Raman, electron spin resonance (ESR) spectroscopy and photoelectrochemistry. Meanwhile, the investigation of photocatalytic performance can confirm that the nitrogen fixation rate of In2O3/In2S3 (III) heterostructure is 40.04 mu mol g(-1) h(-1), which is about 4.7 and 6.0 times higher than that of pure In2O3 and In2S3, respectively.
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