Controllable synthesis of {001} facet dependent foursquare BiOCl nanosheets: A high efficiency photocatalyst for degradation of methyl orange

Li, Kai; Liang, Yujun; Yang, Jian; Gao, Qiang; Zhu, Yongwei; Liu, Shiqi; Xu, Rui; Wu, Xiaoping

doi:10.1016/j.jallcom.2016.10.204

Cited by 90 publications

(23 citation statements)

References 52 publications

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“…These results could be attributed to the effective inhibition of photogenerated electrons and holes due to the band coupling between BiOCl and ZnO. The obtained results agree with previous findings that showed an effective degradation by inhibiting of the electron ( e − ) and hole ( h + ) pairs . Surprisingly, the PL intensity of Bi/Zn/Bent (50%) catalyst was found higher than that of the Bi/Zn/Bent (20% and 70%; Figure ).…”

Section: Resultssupporting

confidence: 90%

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Synthesis, characterization, and photocatalytic activities of novel bentonite‐supported BiOCl–ZnO heterojunction (BiOCl–ZnO–Bentonite) under UV light

Vai̇zoğullar

2017

Asia-Pacific J Chem Eng

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Herein, we report the synthesis of a new composite catalyst immobilized on bentonite surface (BiOCl-ZnO-Bent). The samples were characterized using Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), X-ray Diffraction (XRD), Brunauer-Emmett-Teller, photoluminescence, and Diffuse Reflectance Spectra (UV-Vis DRS) analyses. BiOCl were observed as nanosheets, whereas ZnO particles were nearly spherical (SEM images). Bentonite clay was used to increase the surface area of the samples. Brunauer-Emmett-Teller surface area of Bi/Zn/Bent (50%) catalyst was lower than that of the ZnO-Bent and BiOCl-Bent. The prepared photocatalyst decomposed 10 mg L −1 of 3-chlorophenol (3-CP) within 180 min under UV light. Bi/Zn/ Bent (50%) catalyst showed the highest photocatalytic activity. A proposed degradation mechanism for Bi/Zn/Bent (50%) composite is also discussed.

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Section: Resultssupporting

confidence: 90%

“…It is also possible that more available (110) facets, which lead to more exposure of (001) facets, presented the higher photocatalytic activity in the degradation process . Another source of higher catalytic performances of Bi/Zn/Bent (50%) is band gap ( E g ).…”

Section: Resultsmentioning

confidence: 99%

Synthesis, characterization, and photocatalytic activities of novel bentonite‐supported BiOCl–ZnO heterojunction (BiOCl–ZnO–Bentonite) under UV light

Vai̇zoğullar

2017

Asia-Pacific J Chem Eng

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“…Two emission peaks are located at 420 and 475 nm. The former arises from the intrinsic emission due to the interband transition of TiO 2 , and the latter is caused by the radiative recombination mediated by defects such as O v and concomitant Ti 3+ . The PL of T240 is obviously stronger than that of T250, indicating higher separation and transfer efficiencies of the photogenerated carriers for T250.…”

Section: Resultsmentioning

confidence: 99%

Improved photocatalytic performance of anatase TiO₂ synthesized through ethanol supercritical drying technique

Xian

Liu

Wang

et al. 2019

Applied Organom Chemis

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Anatase titania (TiO 2 ) nanoparticles were synthesized via a self-developed ethanol vapor-thermal method at 240°C (T240) and 250°C (T250), i.e. at temperatures lower and higher, respectively, than the supercritical temperature (243.5°C, 7.0 MPa) of ethanol. Compared to T240, T250 exhibited a higher ratio of exposed (001) facets, oxygen vacancies, and concomitant TiO x . The specific surface area of T250 was 119.0 m 2 g −1 , smaller than that of T240 (144.2 m 2 g −1 ). During the degradation of methylene blue, T250 exhibited a high apparent rate constant (K app ) of 14.5 × 10 −2 min −1 , which was 6.3 times larger than that for T240. Furthermore, compared to T240, T250 exhibited better performance toward degradation of phenol. Results of electron spin resonance spectroscopy and photoluminescence indicated that the photogenerated electron-hole pairs possessed higher separation efficiency for T250 than for T240. In summary, the excellent photocatalytic performance of T250 originates from the higher ratios of exposed (001) facets, oxygen vacancies or TiO x , C═O groups adsorbed at the surface of particles, and higher separation efficiency of photogenerated electron-hole pairs. By employing this selfdeveloped vapor-thermal method, a variety of catalysts and their composites can be synthesized, which may exhibit novel morphological characteristics and properties as well as excellent photocatalytic performance.

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“…No peaks corresponding to other impurities such as Bi 2 O 3 or Bi 12 O 12 Cl 6 were detected. The XRD patterns of the BiOCl/UiO‐66 composite showed the peaks at 12.04°, 24.16°, 25.94°, 32.61°, 33.51°, 36.59°, 40.96°, 46.72°, 49.80°, 54.20°, 55.15°, 58.72°, 60.68°, corresponding to (001), (002), (101), (110), (102), (003), (112), (200), (004), (211), (104), (212), (203) of BiOCl, respectively . Compared to the XRD patterns of pure BiOCl, two new diffraction peaks at 2θ = 7.42° and 8.54° appeared, which agreed with the (111) and (002) planes of UiO‐66 .…”

Section: Resultsmentioning

confidence: 85%

BiOCl/UiO‐66 composite with enhanced performance for photo‐assisted degradation of dye from water

Tong

Yang

Feng

et al. 2017

Applied Organom Chemis

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Semiconductor‐based photocatalysis is an environmental friendly and cost‐effective technique for water treatment. Due to their unique properties, metal–organic frameworks (MOFs) are considered as ideal platform to develop composite photocatalyst. In this study, Bismuth oxychloride (BiOCl) was first attempt to be incorporated with highly stable MOFs, UiO‐66(Zr) by hydrothermal reaction. Different characterization methods including X‐ray diffraction, Scanning electron microscopy, Fourier transform infrared spectroscope, X‐ray photoelectron spectroscopy had been used to prove the successful synthesis of composite photocatalyst. The resultant BiOCl/UiO‐66 composite showed higher photodegradation performance of Rhodamine B (RhB) under ultraviolet and visible light irradiation than that of pristine materials and their mechanically mixed sample. In addition, the composite exhibited good structural stability and reusability. The photocatalytic mechanism of RhB degradation over the composite under visible light proceeded via a photosensitization process. A better adsorptivity of RhB and effective electron transfer within the hybrid material might be responsible for the enhanced photocatalytic performance.

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Controllable synthesis of {001} facet dependent foursquare BiOCl nanosheets: A high efficiency photocatalyst for degradation of methyl orange

Cited by 90 publications

References 52 publications

Synthesis, characterization, and photocatalytic activities of novel bentonite‐supported BiOCl–ZnO heterojunction (BiOCl–ZnO–Bentonite) under UV light

Synthesis, characterization, and photocatalytic activities of novel bentonite‐supported BiOCl–ZnO heterojunction (BiOCl–ZnO–Bentonite) under UV light

Improved photocatalytic performance of anatase TiO₂ synthesized through ethanol supercritical drying technique

BiOCl/UiO‐66 composite with enhanced performance for photo‐assisted degradation of dye from water

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Controllable synthesis of {001} facet dependent foursquare BiOCl nanosheets: A high efficiency photocatalyst for degradation of methyl orange

Cited by 90 publications

References 52 publications

Synthesis, characterization, and photocatalytic activities of novel bentonite‐supported BiOCl–ZnO heterojunction (BiOCl–ZnO–Bentonite) under UV light

Synthesis, characterization, and photocatalytic activities of novel bentonite‐supported BiOCl–ZnO heterojunction (BiOCl–ZnO–Bentonite) under UV light

Improved photocatalytic performance of anatase TiO2 synthesized through ethanol supercritical drying technique

BiOCl/UiO‐66 composite with enhanced performance for photo‐assisted degradation of dye from water

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Resources

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Improved photocatalytic performance of anatase TiO₂ synthesized through ethanol supercritical drying technique