Porous and visible-light-driven p–n heterojunction constructed by Bi2O3 nanosheets and WO3 microspheres with enhanced photocatalytic performance

Rong, Bin; Chen, Xia; Ding, Yuying; Huang, Yunfang; Fan, Leqing; Wu, Jihuai

doi:10.1016/j.seppur.2020.117815

Cited by 29 publications

(8 citation statements)

References 54 publications

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“…Among the various types of type II heterojunction explored, p‐n heterojunction (Figure 4E) photocatalysts have sparked immense interest due to their remarkable spatial configuration of band potential, which delivers a potential driving force coming from the internal electric field formed from the n‐type ZnIn 2 S 4 to the p‐type semiconductor 99 . As illustrated in the previous studies, the system induces the acceleration of photoinduced electron–hole pair separation and also presents excellent conversion efficiency at the contacting interface, in addition to the improvement of light‐harvesting capacity 100–102 …”

Section: Modification Strategies Of Znin2s4mentioning

confidence: 91%

“…99 As illustrated in the previous studies, the system induces the acceleration of photoinduced electronhole pair separation and also presents excellent conversion efficiency at the contacting interface, in addition to the improvement of light-harvesting capacity. [100][101][102] As for the widely applied Z-scheme system, the presence of an electron acceptor/donor pair as mediator is considered the liquid-phase Z-scheme system, whereas the absence of shuttle redox mediators is known as solidphase Z-scheme system. 77 Scrutinizing the rationality of the solid-phase Z-scheme in lieu of the liquid-phase Z-scheme system, researchers have elucidated the limitations of the traditional Z-scheme system where backward reactions, light absorption by redox mediators, and low stability are all potentially occurred.…”

Section: Modification Strategies Of Znin 2 Smentioning

confidence: 99%

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Shining light on ZnIn₂S₄ photocatalysts: Promotional effects of surface and heterostructure engineering toward artificial photosynthesis

Ong

2022

EcoMat

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The gradual depletion of fossil fuel reserves that contribute to $85% of global energy production and release of toxic effluents urges the transformation toward renewable fuels. Thus, the sustainable utilization of sunlight for water splitting and CO 2 reduction with heterogeneous photocatalysts has come to light. As a semiconductor photocatalyst, ZnIn 2 S 4 has hit the limelight owing to its narrow bandgap and visible-light-responsive properties. However, the limitations of ZnIn 2 S 4 include limited active sites, fast charge-carrier recombination, and low photoconversion efficiency. Beginning from the fundamental photocatalytic mechanism, this review then provides in-depth insights into several modification strategies of ZnIn 2 S 4 , extending from defect engineering, facet engineering, cocatalyst loading to junction engineering, enabling the synergistic construction of high-performance ZnIn 2 S 4 -based systems. Subsequently, the structure-performance relation of ZnIn 2 S 4 -based photocatalysts for hydrogen evolution (HER), overall water splitting (OWS), and CO 2 reduction applications in the last 4 years will be discussed and concluded by the future perspectives of this frontier.

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Section: Modification Strategies Of Znin2s4mentioning

confidence: 91%

Section: Modification Strategies Of Znin 2 Smentioning

confidence: 99%

Shining light on ZnIn₂S₄ photocatalysts: Promotional effects of surface and heterostructure engineering toward artificial photosynthesis

Ong

2022

EcoMat

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“…Recently, the heterojunction between Bi 2 O 3 and WO 3 has attracted special attention for photodegradation and water splitting. Wei et al [22] designed the porous WO 3 microspheres embedded with Bi 2 O 3 nanosheets, facilitating the separation and migration of charge carriers for dye photodegradation. Khan et al [23] synthesized Bi 2 O 3 /h-WO 3 nanocomposite as photoactive materials for water splitting, which exhibited a decreased bandgap and minimized recombination of the charge carriers due to the strain effect of Bi 2 O 3 .…”

Section: Introduction mentioning

confidence: 99%

Interfacial energy barrier tuning of hierarchical Bi2O3/WO3 heterojunctions for advanced triethylamine sensor

Zhang

Li²,

Zhang³

et al. 2022

J Adv Ceram

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Traditional triethylamine (TEA) sensors suffer from the drawback of serious cross-sensitivity due to the low charge-transfer ability of gas-sensing materials. Herein, an advanced anti-interference TEA sensor is designed by utilizing interfacial energy barriers of hierarchical Bi2O3/WO3 composite. Benefiting from abundant slit-like pores, desirable defect features, and amplification effect of heterojunctions, the sensor based on Bi2O3/WO3 composite with 40% Bi2O3 (0.4-Bi2O3/WO3) demonstrates remarkable performance in terms of faster response/recovery time (1.7-fold/1.2-fold), higher response (2.1-fold), and lower power consumption (30 °C-decrement) as compared with the pristine WO3 sensor. Furthermore, the composite sensor exhibits long-term stability, reproducibility, and negligible response towards interfering molecules, indicating the promising potential of Bi2O3/WO3 heterojunctions in anti-interference detection of low-concentration TEA in real applications. This work not only offers a rational solution to design advanced gas sensors by tuning the interfacial energy barriers of heterojunctions, but also provides a fundamental understanding of hierarchical Bi2O3 structures in the gas-sensing field.

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“…In addition, the severe photocorrosion phenomenon, which may lead to secondary pollution and reagent waste, has always been a tricky problem that prevents the wide application of Bi 2 O 3 . [35][36][37][38][39] In previous studies, we found that Bi 2 O 3 photocorrosion can be effectively weakened by modifications using polyaniline (PANI); meanwhile, the degradation efficiency of pollutants showed an obvious downward trend with increasing PANI content. [40] Given this information, further research on modifying Bi 2 O 3 is necessary to improve photocatalysis performance and photocorrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Antiphotocorrosion UV‐Bi₂O₃@PANI Photocatalyst Rich in Oxygen Vacancy Defects: Building Processes, Preparation Mechanisms, and Photocatalysis Performance

Dou

Kong

et al. 2022

Physica Status Solidi (a)

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Low content of oxygen vacancy defects (OVs) and limited resistibility to photocorrosion are the core problems in the heterogeneous photocatalytic processes of bismuth oxide (Bi2O3). Herein, the strategy of “ultraviolet (UV) light‐inducing OVs” coupling with “polyaniline (PANI) combination inhibiting photocorrosion” is employed on the modification of Bi2O3. First, the high methylene blue (MB) degradation efficiency by UV3h‐Bi2O3@PANI0.5 wt% above 99.5% and the low Bi3+ dissolved concentration below 0.20 mg L−1 under visible light signify the high photocatalytic activity and stability. Then, the mechanisms for generation of OVs and inhibition of photocorrosion are proposed as follows. 1) Holes (h+) forming under irradiation, diffusing through the lattice, and reaching the surface of Bi2O3 can be regarded as a monatomic oxygen ion (OS−); 2) OS− combines and continues to be oxidized by h+, leading to the generation of O2 with the OVs left in the lattice; 3) UV‐Bi2O3 and PANI are excited to produce electrons/holes (e−/h+); 4) e−/h+ transfer in UV‐Bi2O3@PANI heterojunction leads to the separation of h+ from UV‐Bi2O3 and the inhibition of photocorrosion. Through the core problems being overcome, a new idea for the development and application of Bi2O3 with excellent performances in the field of water treatment is provided.

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Porous and visible-light-driven p–n heterojunction constructed by Bi2O3 nanosheets and WO3 microspheres with enhanced photocatalytic performance

Cited by 29 publications

References 54 publications

Shining light on ZnIn₂S₄ photocatalysts: Promotional effects of surface and heterostructure engineering toward artificial photosynthesis

Shining light on ZnIn₂S₄ photocatalysts: Promotional effects of surface and heterostructure engineering toward artificial photosynthesis

Interfacial energy barrier tuning of hierarchical Bi2O3/WO3 heterojunctions for advanced triethylamine sensor

Antiphotocorrosion UV‐Bi₂O₃@PANI Photocatalyst Rich in Oxygen Vacancy Defects: Building Processes, Preparation Mechanisms, and Photocatalysis Performance

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Porous and visible-light-driven p–n heterojunction constructed by Bi2O3 nanosheets and WO3 microspheres with enhanced photocatalytic performance

Cited by 29 publications

References 54 publications

Shining light on ZnIn2S4 photocatalysts: Promotional effects of surface and heterostructure engineering toward artificial photosynthesis

Shining light on ZnIn2S4 photocatalysts: Promotional effects of surface and heterostructure engineering toward artificial photosynthesis

Interfacial energy barrier tuning of hierarchical Bi2O3/WO3 heterojunctions for advanced triethylamine sensor

Antiphotocorrosion UV‐Bi2O3@PANI Photocatalyst Rich in Oxygen Vacancy Defects: Building Processes, Preparation Mechanisms, and Photocatalysis Performance

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Shining light on ZnIn₂S₄ photocatalysts: Promotional effects of surface and heterostructure engineering toward artificial photosynthesis

Shining light on ZnIn₂S₄ photocatalysts: Promotional effects of surface and heterostructure engineering toward artificial photosynthesis

Antiphotocorrosion UV‐Bi₂O₃@PANI Photocatalyst Rich in Oxygen Vacancy Defects: Building Processes, Preparation Mechanisms, and Photocatalysis Performance