JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 53
·期 7
·4848-4860
·
IF 2.599
Shen Jing,Xue Jinjuan,Chen Zixiao,Ni Jie,Tang Bo,He Guangyu,Chen Haiqun
Here, we report a simple approach to fabricate 3D hierarchical peony-like Ag/Bi 2 WO 6 hybrid photocatalyst through one-step hydrothermal method with l -leucine as a template. The morphology and structure of the resultant materials were characterized by various analytical methods, such as X-ray diffraction, field emission scanning electron microscopy and UV–Vis diffuse reflectance spectra. The photocatalytic performance of Bi 2 WO 6 and Ag/Bi 2 WO 6 samples was evaluated by degrading organic dye and antibiotic in water under visible light irradiation. A series of results indicated that loaded Ag nanoparticles significantly improve the photocatalytic activity of Bi 2 WO 6 . In addition, the possible mechanism was proposed that the enhanced photocatalytic activity was resulted from the unique configuration of peony-like morphology that favorable for the adsorption of organic compounds and the high Schottky barriers between interface of Ag NPs and Bi 2 WO 6 , which promoted the transfer of photogenerated electrons from Bi 2 WO 6 to Ag NPs. Meanwhile, noble metal Ag can induce surface plasmon resonance leading to the better visible light absorption of Bi 2 WO 6 .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2019
·Vol. 11
·期 24
·6391-6397
·
IF 4.495
Huifan Li,Gaifang Pan,Mengna Ding,Wenkai Pei,Ziping Zhang,Yingchun Miao,Yuning Huo
Ag/Bi 2 WO 6 microspheres were successfully prepared by ultrasound-assisted photo-reduction route to realize the Ag-loading on Bi 2 WO 6 crystal, which was previously synthesized by using solvothermal process with [C 4 -mim]BF 4 ionic liquid. The synergistic process of photo-reduction and ultrasonic irradiation induced the efficient conversion of Ag + ion into metallic Ag nanoparticles with uniform distribution. The enhanced amount of Ag nanoparticles and the strong combination of Ag nanoparticles with Bi 2 WO 6 microspheres, efficiently promoted the light harvesting and inhibited the recombination of photo-induced charges. As a result, Ag/Bi 2 WO 6 microspheres via ultrasound-assisted photo-reduction route achieved the higher visible-light photocatalytic activity for H 2 evolution than those catalysts prepared by other methods. This work may provide an efficient way for designing photocatalysts for hydrogen generation using solar light. Graphical Photocatalysis : The synergistic process of photo-reduction and ultrasound irradiation was utilized to achieve the uniform Ag-loading on Bi 2 WO 6 microspheres. The enhanced amount of Ag nanoparticles and their strong combination with Bi 2 WO 6 crystals was beneficial for improving visible-light absorption, and inhibiting recombination of photo-generated charges. It resulted in the promoted activity for visible-light photocatalytic H 2 evolution.
研究领域:
材料科学
·
光催化
·
纳米技术
·
氢能
·
环境科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 12
·11754-11766
·
IF 2.8
Dong Hao,Yin Yongyuan,Guo Xuetao
Ag/Bi 2 WO 6 /graphene oxide composite with excellent photocatalytic properties was successfully prepared by hydrothermal-photoreduction synergistic method and is applied in antibiotics degradation. The structure and properties of as-prepared photocatalysts were characterized by Fourier infrared spectrum (FTIR), X-ray photoelectron spectroscopy (XPS), specific surface area analyzer (BET), scanning electron microscopy (SEM), X-ray diffraction (XRD), and atomic force microscope (AFM). The results indicated that Ag and Bi 2 WO 6 were uniformly loaded on the surface of graphene oxide. In addition, graphene oxide with conjugated carbon network structures has been applied as a photocatalyst supporter for the high electronic conductivity and the large reactive sites. Compared with the pure graphene oxide, the as-prepared Ag/Bi 2 WO 6 /graphene oxide catalyst exhibited excellent degradation efficiency and stability for degrading tylosin under Xe lamp irradiation. Under simulated sunlight irradiation, the photodegradation efficiency of tylosin by Ag/Bi 2 WO 6 /graphene oxide achieved at 98% within 2 h, compared to 50% by pure graphene oxide. The excellent photodegradation ability is caused by the synergetic effect of Ag, Bi 2 WO 6 , and graphene oxide nanoparticles.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
LiWei Yang,YaQi Peng,ChengFeng Qian,GuoHua Xing,JiaoJie He,ChuanLiang Zhao,Bo Lai
An easily separation composite, magnetic chitosan@bismuth tungstate coated by silver (MCTS-Ag/Bi 2 WO 6 ), was successfully synthesized by the simple hydrothermal method. Moreover, the MCTS-Ag/Bi 2 WO 6 demonstrated excellent adsorption/photocatalytic removal of Cu(II) in aqueous solution. Adsorption played a leading role in the synergistic reaction. The catalysts were characterized by fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and scanning electron microscope (SEM). The effects on adsorption of Cu(II) were investigated, which included illumination, pH, and initial concentration. The experimental results showed that the theoretical maximum adsorption capacity of Cu(II) (181.8 mg/g) was achieved under simulated solar light irradiation with the optimal pH value of 6.0, indicating that illumination could enhance the adsorption of Cu(II) by MCTS-Ag/Bi 2 WO 6 . Meanwhile, the composite exhibited desirable adsorption ability of Cu(II) after 5 cycles. The copper ion adsorption fitted well with pseudo-second-order kinetic model and its isotherm followed Freundlich model.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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