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Preparation and Comparison of the Photocatalytic Properties of ZnSe with Different Crystalline Phases
Author(s) -
Shi Zhu,
Liu Jiani,
Liu Dongxu,
Zhang Qi,
Lang Jihui,
Li Xiuyan
Publication year - 2019
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201800754
Subject(s) - photocatalysis , materials science , ethylenediamine , aqueous solution , adsorption , visible spectrum , zinc , absorption (acoustics) , desorption , cobalt , photochemistry , optoelectronics , chemistry , inorganic chemistry , catalysis , composite material , organic chemistry , metallurgy
Hexagonal wurtzite (HWZ) ZnSe nanosheets (NSs) and cubic zinc blende (CZB) ZnSe nanodisks (NDs) are successfully fabricated by treating the relevant precursor ZnSe(en) 0.5 (en = ethylenediamine) composites that are prepared by the solvothermal method without or with NaBH 4 . The morphological and structural analyses show that the NaBH 4 affects not only the crystalline phase structure but also the geometrical morphology of ZnSe. The result of nitrogen adsorption–desorption reveals that CZB ZnSe NDs have larger specific surface area than that of HWZ ZnSe NSs. Ultraviolet–visible diffuse reflection spectra (UV–vis DRS) indicate the light‐absorption capacity of CZB ZnSe NDs in the visible region is slightly stronger than that of HWZ ZnSe NSs. The photocatalytic properties of HWZ ZnSe NSs and CZB ZnSe NDs are compared by decolorization of methyl orange (MO) aqueous solution under simulated sunlight illumination. The result shows that the degradation rate constant of MO over CZB ZnSe NDs is ≈1.8 times larger than that of HWZ ZnSe NSs.