Photocatalytic reduction of CO2 on BiOX： Effect of halogen element type and surface oxygen vacancy mediated mechanism

Ren, Xuejun; Gao, Meichao; Zhang, Yanfeng; Zhang, Zizhong; Cao, Xingzhong; Wang, Baoyi; Wang, Xuxu

doi:10.1016/j.apcatb.2020.119063

Cited by 301 publications

(89 citation statements)

References 57 publications

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“…Precipitation is a simple, cost-effective and rapid process of synthesizing semiconductor photocatalysts that can be easily replicated on a larger scale for industrial applications. Further, it is an eco-friendly route that hardly requires any hazardous organic solvents and treatments under high pressure or temperature [90]. The precipitation synthesis of BiOX typically involves the dropwise addition of halide (KX or NaX, where X = Cl, Br and I) solution into a solution of bismuth salt (BiCl 3 , Bi(NO 3 ) 3 through co-precipitation and subsequent solvothermal treatment in ethylene glycol, which produced a hierarchical structure by the process of dissolution-recrystallization of 1D Bi 24 O 31 Br 10 nanobelts [61].…”

Section: Precipitation Techniquementioning

confidence: 99%

“…As mentioned earlier, BiOX photocatalysts are mainly employed for the photocatalytic degradation of organic pollutants and are seldom effective in the reduction of CO 2 conversion at neutral condition due to its positive CB position [170]. Therefore, only a few photocatalytic reduction reactions of pristine BiOX for photocatalytic CO 2 conversion have been reported to date [90,[171][172][173][174][175][176][177][178][179]. On the other hand, theoretical studies indicated that the increase in the Bi-content in BiOX could promote the reduction power of photogenerated electrons and increase the thermodynamic force for initiating many reduction reactions that were not possible to be carried out with BiOX.…”

Section: Carbon Dioxide Reductionmentioning

confidence: 99%

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Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

et al. 2021

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Semiconductor-based photocatalysis has been identified as an encouraging approach for solving the two main challenging problems, viz., remedying our polluted environment and the generation of sustainable chemical energy. Stoichiometric and non-stoichiometric bismuth oxyhalides (BiOX and BixOyXz where X = Cl, Br, and I) are a relatively new class of semiconductors that have attracted considerable interest for photocatalysis applications due to attributes, viz., high stability, suitable band structure, modifiable energy bandgap and two-dimensional layered structure capable of generating an internal electric field. Recently, the construction of heterojunction photocatalysts, especially 2D/2D systems, has convincingly drawn momentous attention practicably owing to the productive influence of having two dissimilar layered semiconductors in face-to-face contact with each other. This review has systematically summarized the recent progress on the 2D/2D heterojunction constructed between BiOX/BixOyXz with graphitic carbon nitride (g-C3N4). The band structure of individual components, various fabrication methods, different strategies developed for improving the photocatalytic performance and their applications in the degradation of various organic contaminants, hydrogen (H2) evolution, carbon dioxide (CO2) reduction, nitrogen (N2) fixation and the organic synthesis of clean chemicals are summarized. The perspectives and plausible opportunities for developing high performance BiOX/BixOyXz-g-C3N4 heterojunction photocatalysts are also discussed.

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Section: Precipitation Techniquementioning

confidence: 99%

Section: Carbon Dioxide Reductionmentioning

confidence: 99%

Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

et al. 2021

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“…The photocatalytic conversion technology of CO2 to carbonaceous chemicals [109] can be used to prepare feedstock for many processes, which is a promising solution to reduce greenhouse gases and storing energy [110]. Understanding the reaction mechanism of CO2 and especially the active site of the photocatalyst can help develop the application of photocatalysts [111].…”

Section: Co2 Reductionmentioning

confidence: 99%

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

Akhoondi

Feleni

Bethi³

et al. 2021

Synth. Sinter.

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Among the ongoing research on photocatalysis under visible-light, it has been shown that doped or hybrid catalysts are more active than a single catalyst alone. However, problems including visible light absorption, a low quantity of energetic sites on surfaces, and rapid recombination of the photo-electron hole pair produced by light have prohibited photocatalysts from being used in a practical and widespread manner. To overcome these problems, synthesis of nanostructure hybrid catalyst using several methods has attracted much attention. Several procedures have been suggested for the preparation of photocatalysts with the desired structure and morphology. Preparation methods similar to partial modification may lead to diverse structures and qualities. In this regard, the development of efficient, low-cost photocatalysts and rapid synthesis is the most important issues that should be considered. This review discusses various methods and mechanisms that work with the modification of vanadium compounds as photocatalysts to progress their photocatalytic efficiency. In addition, the effects of synthesis temperature, solution pH and concentration on the photocatalytic performance are also described in detail.

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“…[1][2][3][4][5] As a member of Bi x O y X z (X = Cl, Br and I), Bi 4 O 5 Br 2 photocatalyst with layered structure has a built-in electric field that can accelerate the migration of carrier. [6][7][8] Whatʼs more, Bi 4 O 5 Br 2 has a relatively narrow bandgap (2.36 eV), which could get a higher visible light absorption capacity. 9 Meanwhile, its photogenerated carriers are easy to recombine, reducing the photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

PVP‐assisted synthesis of P‐Bi₄O₅Br₂/AgI heterojunction with enhanced photocatalytic activity for degradation of rhodamine B

Luo

Xiao

Wang

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: The commonly used RhB dye is a carcinogen that is widely found in environmental matrices and poses a threat to aquatic biota and human health. However, conventional wastewater treatment processes do not effectively remove low concentrations of these pollutants. Herein, the P-Bi 4 O 5 Br 2 /AgI (PBA) heterojunction was synthesized via a polyvinylpyrrolidone (PVP)-assisted solvothermal and precipitation method in this work. RESULTS:The photocatalytic efficiency of the PBA heterojunction was evaluated by degrading rhodamine B (RhB) with the irradiation of simulated sunlight. P-Bi 4 O 5 Br 2 /AgI-50 (PBA-50, the mass fraction of AgI in the composite was 50%) composite could degrade 98% RhB under 90 min irradiation of 500 W Xenon lamp, and its pseudo first-order reaction rate constant was 0.04265 min −1 , which was 17.1, 2.16, and 2.94 times higher than that of Bi 4 O 5 Br 2 , P-Bi 4 O 5 Br 2 , and AgI, respectively. Besides, the effects of the dosage of photocatalyst and the anion on the photocatalytic degradation of RhB over PBA-50 were analyzed. CONCLUSION:The enhanced photocatalytic activity of PBA was attributed to its better visible light capture ability, larger specific surface area, and faster photogenerated carrier separation efficiency, all of which were confirmed by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), UV-Vis diffues reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), and photoelectrochemical analysis. In addition, the free radical trapping experiments confirmed that •O 2 − and h + were the main active species for degradation of RhB. Additionally, the smaller bandgap and the more negative conduction band position of Bi 4 O 5 Br 2 were reached after the introduction of PVP. Accordingly, a possible type-II heterojunction photocatalytic mechanism of P-Bi 4 O 5 Br 2 /AgI was proposed.

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Photocatalytic reduction of CO2 on BiOX： Effect of halogen element type and surface oxygen vacancy mediated mechanism

Cited by 301 publications

References 57 publications

Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

PVP‐assisted synthesis of P‐Bi₄O₅Br₂/AgI heterojunction with enhanced photocatalytic activity for degradation of rhodamine B

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Photocatalytic reduction of CO2 on BiOX： Effect of halogen element type and surface oxygen vacancy mediated mechanism

Cited by 301 publications

References 57 publications

Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

PVP‐assisted synthesis of P‐Bi4O5Br2/AgI heterojunction with enhanced photocatalytic activity for degradation of rhodamine B

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PVP‐assisted synthesis of P‐Bi₄O₅Br₂/AgI heterojunction with enhanced photocatalytic activity for degradation of rhodamine B