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Micelle‐Directing Synthesis of Ag‐Doped WO 3 and MoO 3 Composites for Photocatalytic Water Oxidation and Organic‐Dye Adsorption
Author(s) -
Bate Nasen,
Shi Hongfei,
Chen Li,
Wang Jiabo,
Xu Shasha,
Chen Weilin,
Li Jianping,
Wang Enbo
Publication year - 2017
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201700951
Subject(s) - rhodamine b , photocatalysis , materials science , x ray photoelectron spectroscopy , diffuse reflectance infrared fourier transform , dielectric spectroscopy , adsorption , spectroscopy , visible spectrum , aqueous solution , photoluminescence , doping , analytical chemistry (journal) , nuclear chemistry , electrochemistry , chemical engineering , chemistry , catalysis , organic chemistry , physics , optoelectronics , electrode , quantum mechanics , engineering
In this paper, an Ag‐doped WO 3 (and MoO 3 ) composite has been prepared by following a simple micelle‐directed method and high‐temperature sintering route. The as‐prepared samples were characterized by X‐ray diffraction, inductively coupled plasma, transmission electron microscopy, X‐ray photoelectron spectroscopy, UV/Vis diffuse reflectance spectroscopy, Brunauer–Emmett–Teller, photoluminescence spectroscopy, and electrochemical impedance spectroscopy techniques. The photocatalytic experiments reveal that their oxygen‐production rates are up to 95.43 μmol (75.45 μmol) for Ag‐doped WO 3 (MoO 3 ), which is 9.5 (7.3) times higher than that of pure WO 3 : 9.012 μmol (MoO 3 : 9.00 μmol) under visible‐light illumination ( λ ≥420 nm), respectively. The improvement of their photocatalytic activity is attributed to the enhancement of their visible‐light absorption and the separation efficiency of photogenerated carriers by Ag doping. Moreover, Ag‐doped WO 3 (MoO 3 ) also shows excellent adsorption of rhodamine B (RhB) and methylene blue (MB) in aqueous solution, with maximum adsorption capacities towards RhB and MB of 822 and 820 mg g −1 for Ag‐doped WO 3 , and 642 and 805 mg g −1 for Ag‐doped MoO 3 , respectively.