Increasing visible-light absorption for photocatalysis with black BiOCl

Ye, Liqun; Deng, Kejian; Xu, Feng; Tian, Lihong; Peng, Tianyou; Zan, Ling

doi:10.1039/c1cp22876e

Cited by 394 publications

(246 citation statements)

References 36 publications

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“…Nitroblue tetrazolium chloride (NBT, 2.5 × 10 − 5 mol/L, exhibiting an absorption maximum at 259 nm) was used to determine the amount of O 2 U− generated in the BiOBr and BiOCl photocatalytic systems (Ye et al, 2012a). The production of O 2 U− was quantitatively analyzed by detecting the absorption decrease of NBT.…”

Section: Active Species Analysismentioning

confidence: 99%

Photocatalytic properties of hierarchical BiOXs obtained via an ethanol-assisted solvothermal process

Jia

Wang

et al. 2015

Journal of Environmental Sciences

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Section: Active Species Analysismentioning

confidence: 99%

Photocatalytic properties of hierarchical BiOXs obtained via an ethanol-assisted solvothermal process

Jia

Wang

et al. 2015

Journal of Environmental Sciences

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“…As investigated, the oxygen vacancies can not only serve as photoinduced charge traps to prevent the electron−hole recombination, they are also effective adsorption sites to adsorb active species which may greatly increase the photocatalytic activity 17,18 . Moreover, oxygen vacancies can also form oxygen vacancy states lying close to the conduction band of the photocatalyst, which can enhance its visible light response 17 . Except for TiO 2 and BiOCl, Zhu et al 18,19 also reported that oxygen vacancies enriched BiPO 4 nanorod, prepared by vacuum deoxidation, showed enhanced photocatalytic activity and expanded photocatalytic response (more than 365 nm).…”

Section: Introductionmentioning

confidence: 99%

“…However, the charge separation in this p-n heterojunctions always undergoes the photogenerated electrons transferring to the CB of BiPO 4 leaving holes on the VB of narrow band semiconductors [12][13][14] , which can hardly use the high oxidation ability of holes in the higher VB of BiPO 4 . Recently, the oxygen defects have been reported can greatly enhance the photocatalytic activity and expand the range of photoresponse in the semiconductor photocatalysts [15][16][17][18] . As investigated, the oxygen vacancies can not only serve as photoinduced charge traps to prevent the electron−hole recombination, they are also effective adsorption sites to adsorb active species which may greatly increase the photocatalytic activity 17,18 .…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the oxygen defects have been reported can greatly enhance the photocatalytic activity and expand the range of photoresponse in the semiconductor photocatalysts [15][16][17][18] . As investigated, the oxygen vacancies can not only serve as photoinduced charge traps to prevent the electron−hole recombination, they are also effective adsorption sites to adsorb active species which may greatly increase the photocatalytic activity 17,18 . Moreover, oxygen vacancies can also form oxygen vacancy states lying close to the conduction band of the photocatalyst, which can enhance its visible light response 17 .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Surface Oxygen-deficient BiPO4 Nanocubes with Enhanced Visible Light Induced Photocatalytic Activity

Shi

Yin

et al. 2017

Mat. Res.

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The visible light driven BiPO 4 nanocubes with sufficient surface oxygen deficiency were fabricated by a hydrothermal process and subsequently ultrasonic assistant Fe reduction process. The products were characterized by XRD, DRS, XPS, SEM and TEM which showed that the BiPO 4 had cuboid-like shape with a smooth surface and clear edges and the oxygen vacancies were succesfully introduced on the surface of the BiPO 4 nanocubes. The as prepared oxygen-deficient BiPO 4 nanocubes showed greatly enhanced visible light induced photocatalytic activity in degradation of Rhodamine B. The enhanced photocatalytic performance and expanded visible light response of BiPO 4 may be due to the introduction of surface oxygen vacancies which can generate the oxygen vacancies mid-gap states lower to the conduction band of BiPO 4 .

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“…[8][9][10] But for photocatalytic systems, the high rate of electron-hole recombination is due to the high band gap (3.4 eV).…”

Section: Introductionmentioning

confidence: 99%

Investigation of adsorption and photocatalytic activities of in situ cetyltrimethylammonium bromide-modified Bi/BiOCl heterojunction photocatalyst for organic contaminants removal

Xiao

et al. 2016

RSC Adv.

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a Bi/BiOCl heterojunction was prepared via a hydrothermal method, using cetyltrimethylammonium bromide (CTAB) as a stabilizing agent. The structure and chemical properties of Bi/BiOCl with the three different CTAB contents were thoroughly analyzed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), field-emission scanning electron microscope (FESEM), high resolution transmission electron microscope (HRTEM), UV-vis diffuse reflectance spectra (UV-vis DRS), zeta potential, and carbon element analysis, the results indicates that there are some important interactions between CTAB and Bi/BiOCl, resulting in decreasing the band gap of Bi/BiOCl with the increase of CTAB content. Two typical dyes, rhodamine B (RhB) and methyl orange (MO) which has different surface charges, were choosed as the target pollutants. Under the visible light (l ¼ 420 nm), the photocatalytic efficiency of Bi/BiOCl with a higher CTAB (Bi/BiOCl-a) was 3.72-fold more than that of Bi/BiOCl with a lower CTAB (Bi/BiOCl-c) to remove RhB. Bi/BiOCl heterojunction alone exhibited a poor degradation capability for the MO such as 5% of MO photodegradation with Bi/BiOCl-c. In contrast, MO removal efficiency by the Bi/BiOCl-a was 100%. Hence, the CTAB could play an important role to enhance the removal of dyes. Firstly, CTAB could absorb the target pollutants near the surface of Bi/BiOCl due to the electrostatic attraction and dispersion interaction; then Bi/BiOCl could degrade the pollutants via the in situ h + or cO 2À under the visible light. The proposed mechanism was supported by the FTIR and adsorption analysis.

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Increasing visible-light absorption for photocatalysis with black BiOCl

Cited by 394 publications

References 36 publications

Photocatalytic properties of hierarchical BiOXs obtained via an ethanol-assisted solvothermal process

Photocatalytic properties of hierarchical BiOXs obtained via an ethanol-assisted solvothermal process

Synthesis of Surface Oxygen-deficient BiPO4 Nanocubes with Enhanced Visible Light Induced Photocatalytic Activity

Investigation of adsorption and photocatalytic activities of in situ cetyltrimethylammonium bromide-modified Bi/BiOCl heterojunction photocatalyst for organic contaminants removal

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