A dual strategy to construct flowerlike S-scheme BiOBr/BiOAc1−Br  heterojunction with enhanced visible-light photocatalytic activity

Jia, Xuemei; Han, Qiaofeng; Liu, Huanzhen; Li, Shuzhen; Bi, Hongyan

doi:10.1016/j.cej.2020.125701

Cited by 111 publications

(45 citation statements)

References 65 publications

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“…S‐scheme photocatalysts demonstrate efficient performances for reactive oxygen species (ROS) evolution in pollutant decomposition and sterilization processes, e.g., CoFe 2 O 4 /g‐C 3 N 4 , 0D/2D CeO 2 /g‐C 3 N 4 , S‐pCN/WO 2.72 , Sb 2 WO 6 /g‐C 3 N 4 , OVs‐Bi 2 O 3 /Bi 2 SiO 5 , In 2 O 3– x (OH) y /Bi 2 MoO 6 , and BP/BiOBr, Bi 2 MoO 6 /CdS, BiOCl/CuBi 2 O 4 , Bi 2 WO 6 /g‐C 3 N 4 , SnNb 2 O 6 /Ag 3 VO 4 , BiOBr/BiOAC 1–– x Br x , BiOI/Bi 2 WO 6 , Bi 2 O 3 /TiO 2 , In 2 S 3 /Bi 2 O 2 CO 3 , ZnO–V 2 O 5 –WO 3 , S‐doped g‐C 3 N 4 /TiO 2 , BiVO 4 /Ag 3 VO 4 , CdS/UiO‐66, α‐Fe 2 O 3 /Bi 2 WO 6 , Cd 0.5 Zn 0.5 S/g‐C 3 N 4 , Sb 2 WO 6 /BiOBr, and Bi 2 MoO 6 /g‐C 3 N 4 /Au. [ 28,76–97 ] Li et al utilized thin black phosphorus (BP) to couple BiOBr nanosheets to construct S‐scheme BP/BiOBr nanoheterojunction for H 2 O 2 evolution, [ 80 ] as shown in Figure a. H 2 O 2 evolution rate over 10BP/BiOBr is 2.6 times than that over BiOBr.…”

Section: S‐scheme Photocatalystsmentioning

confidence: 99%

S‐Scheme Photocatalytic Systems

et al. 2021

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Recently, step‐scheme (S‐scheme) photocatalysts have received widespread attention in the field of solar fuel development and transformation because of efficient charge spatial separation along with strong redox capabilities. Herein, the development history of S‐scheme photocatalysts is summarized and reviewed, from Z‐scheme photocatalysts to S‐scheme photocatalysts. Advantages of S‐scheme photocatalysts are also discussed in depth and detail, including design principles and construction strategies as well as charge transfer mechanisms. In addition, identification characterizations for S‐scheme photocatalysts and their solar energy conversion applications are also reviewed. Finally, conclusions and outlooks for solar energy conversion challenges are demonstrated. It provides insights and up‐to‐date information to enable the scientific community to fully tap into the potential of S‐scheme photocatalysts in renewable energy generation and environmental remediation.

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Section: S‐scheme Photocatalystsmentioning

confidence: 99%

S‐Scheme Photocatalytic Systems

et al. 2021

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“…However, the electrons from TiO 2 and WO 3 conduction bands (CB) cannot be involved in •O − 2 generation, and the holes from Cu 2 S valence band (+0.92 eV) cannot produce •OH, owing to their potential. Consequently, some of those charges which are not useful for photocatalytic reaction will recombine [ 47 , 48 ]. The useful electrons from the Cu 2 S valence band (−0.4 eV), as well as the holes from TiO 2 (+2.9 eV) and WO 3 (+3.1 eV) valence bands, have a stronger redox ability and are efficiently separated by the electric field in the charged space region.…”

Section: Resultsmentioning

confidence: 99%

Tuned S-Scheme Cu2S_TiO2_WO3 Heterostructure Photocatalyst toward S-Metolachlor (S-MCh) Herbicide Removal

Eneşca

Isac

2021

Materials

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A dual S-scheme Cu2S_TiO2_WO3 heterostructure was constructed by sol–gel method using a two-step procedure. Due to the synthesis parameters and annealing treatment the heterostructure is characterized by sulfur deficit and oxygen excess allowing the passivation of oxygen vacancies. The photocatalytic activity was evaluated under UV and UV–Vis irradiation scenarios using S-MCh as reference pollutant. The heterostructure is composed on orthorhombic Cu2S, anatase TiO2 and monoclinic WO3 with crystallite sizes varying from 65.2 Å for Cu2S to 97.1 Å for WO3. The heterostructure exhibit a dense morphology with pellets and particle-like morphology closely combined in a relatively compact assembly. The surface elemental composition indicate that the heterostructure maintain a similar atomic ratio as established during the synthesis with a slight sulfur deficit due to the annealing treatments. The results indicate that the three-component heterostructure have higher photocatalytic efficiency (61%) comparing with two-component heterostructure or bare components. Moreover, Cu2S_TiO2_WO3 exhibit a superior constant rate (0.114 s−1) due to the high concentration of photogenerated charge carriers, efficient charge separation and migration.

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“…The photocatalytic removal of ciprofloxacin and TC was evaluated using WO 3 (E G = 2.34 eV)/g-C 3 N 4 (E G = 2.65 eV) nanosheets [ 77 ] and BiOBr (E G = 2.83 eV) nanosheets/BiOAc 1−x Br x (E G = 3.28 eV) flower-like [ 78 ] S-scheme heterostructure. The WO 3 /g-C 3 N 4 sample obtained by the template-assisted polymer method exhibited a 43.03 m 2 /g active surface area using the combined advantage of a g-C 3 N 4 thin planar structure and WO 3 oxygen deficit, which enhanced the charge transfer and increased the quantum efficiency.…”

Section: S-scheme Heterostructure Photocatalytic Applicationsmentioning

confidence: 99%

Photocatalytic Activity of S-Scheme Heterostructure for Hydrogen Production and Organic Pollutant Removal: A Mini-Review

Eneşca

Andronic

2021

Nanomaterials

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Finding new technologies and materials that provide real alternatives to the environmental and energy-related issues represents a key point on the future sustainability of the industrial activities and society development. The water contamination represents an important problem considering that the quantity and complexity of organic pollutant (such as dyes, pesticides, pharmaceutical active compounds, etc.) molecules can not be efficiently addressed by the traditional wastewater treatments. The use of fossil fuels presents two major disadvantages: (1) environmental pollution and (2) limited stock, which inevitably causes the energy shortage in various countries. A possible answer to the above issues is represented by the photocatalytic technology based on S-scheme heterostructures characterized by the use of light energy in order to degrade organic pollutants or to split the water molecule into its components. The present mini-review aims to outline the most recent achievements in the production and optimization of S-scheme heterostructures for photocatalytic applications. The paper focuses on the influence of heterostructure components and photocatalytic parameters (photocatalyst dosage, light spectra and intensity, irradiation time) on the pollutant removal efficiency and hydrogen evolution rate. Additionally, based on the systematic evaluation of the reported results, several perspectives regarding the future of S-scheme heterostructures were included.

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A dual strategy to construct flowerlike S-scheme BiOBr/BiOAc1−Br heterojunction with enhanced visible-light photocatalytic activity

Cited by 111 publications

References 65 publications

S‐Scheme Photocatalytic Systems

S‐Scheme Photocatalytic Systems

Tuned S-Scheme Cu2S_TiO2_WO3 Heterostructure Photocatalyst toward S-Metolachlor (S-MCh) Herbicide Removal

Photocatalytic Activity of S-Scheme Heterostructure for Hydrogen Production and Organic Pollutant Removal: A Mini-Review

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