Current trends on In2O3 based heterojunction photocatalytic systems in photocatalytic application

Chang, Pei; YuhuaWang,; Wang, Yitong; Zhu, Yangyang

doi:10.1016/j.cej.2022.137804

Cited by 103 publications

(28 citation statements)

References 121 publications

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“…29,30 Because of its superior electrical conductivity, excellent photovoltaic properties, and low toxicity, indium oxide (In 2 O 3 ), an n-type semiconductor material with a suitable band gap (∼2.8 eV), has been frequently employed in photocatalysis. 31,32 The small size of In 2 O 3 nanoparticles tends to have a larger specific surface area, which facilitates the modulation of adsorption capacity and the exposure of active sites. 33…”

Section: Introductionmentioning

confidence: 99%

“…Metal oxide nanomaterials have excellent catalytic properties and affinity for pollutants, and they are frequently coupled with other catalysts to improve their pollutant degradation capabilities. , Because of its superior electrical conductivity, excellent photovoltaic properties, and low toxicity, indium oxide (In 2 O 3 ), an n-type semiconductor material with a suitable band gap (∼2.8 eV), has been frequently employed in photocatalysis. , The small size of In 2 O 3 nanoparticles tends to have a larger specific surface area, which facilitates the modulation of adsorption capacity and the exposure of active sites . Furthermore, In 2 O 3 has larger conduction band (CB) and valence band (VB) potentials than Bi 4 O 5 Br 2 , demonstrating the potential to form an S-scheme heterojunction with Bi 4 O 5 Br 2.…”

Section: Introductionmentioning

confidence: 99%

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In₂O₃ Nanoparticle/Bi₄O₅Br₂ Nanosheet S-Scheme Heterojunctions with Interfacial Oxygen Vacancies for Photocatalytic Degradation of Tetracycline

Zhang

Zha

Luo

et al. 2023

ACS Appl. Nano Mater.

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The development of highly efficient photocatalysts for antibiotics contamination in water remains a severe challenge. In this study, In2O3 nanoparticle/Bi4O5Br2 nanosheet S-scheme heterojunction with interface oxygen vacancies (OVs) was constructed by a hydrothermal-calcination approach and a simple chemical precipitation process. Under simulated sunlight, this composite showed enhanced degradation efficiency for tetracycline hydrochloride (TCH) with 92.4%, which was much higher than those of pure Bi4O5Br2 (50.2%) and In2O3 (28.6%). The excellent removal efficiency was mainly attributed to the synergistic effect of S-scheme heterojunctions and interface OVs accelerating the complexation of unwanted electrons (e–) and holes (h+), thus retaining e– with the strong oxidizing ability and h+ with the strong reducing ability to participate in the reaction. In addition, the abundant OVs in In2O3 nanoparticles/Bi4O5Br2 nanosheets could enhance the adsorption of O2 and promote the generation of superoxide radicals (·O2 –). The toxicity of the tetracycline degradation products and the catalyst was evaluated by E. coli growth inhibition experiments. Based on the TCH intermediates detected by HPLC-MS, three possible TCH degradation pathways were proposed. This study shows that the construction of S-scheme heterojunctions with interfacial defects is an effective strategy for the preparation of efficient photocatalysts.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In₂O₃ Nanoparticle/Bi₄O₅Br₂ Nanosheet S-Scheme Heterojunctions with Interfacial Oxygen Vacancies for Photocatalytic Degradation of Tetracycline

Zhang

Zha

Luo

et al. 2023

ACS Appl. Nano Mater.

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“…The above-mentioned experiments show that the photocatalytic activity order for the organic reaction is compound 1 > compound 2 ≈ compound 3 . Considering that three compounds have similar polyoxotungstate-based 3D silver cluster–organic frameworks, the difference in photocatalytic activity may be related to their energy band structure, which usually plays a decisive role in the photocatalytic performance of photocatalysts. , As shown in Figures d and a, the conduction band (CB) potential (−0.77 V vs NHE) of compound 1 is more negative than that of compounds 2 and 3 (−0.12 V vs NHE) and also negative than E (O 2 /O 2 •– ) (−0.33 V vs NHE) and E (H 2 O 2 /O 2 ) (+0.68 V vs NHE), which reveals that the photogenerated electrons on compound 1 can reduce O 2 molecules in air to superoxide radicals O 2 •– and H 2 O 2 upon UV irradiation, , while compounds 2 and 3 only oxidized O 2 molecules to H 2 O 2 species. Moreover, the VB potentials of compounds 1 – 3 are higher than those of H 2 O/O 2 ( E (H 2 O/O 2 ) = +1.23 V vs NHE) and H 2 O 2 /O 2 •– ( E (H 2 O 2 /O 2 •– ) = +1.44 V vs NHE) .…”

Section: Results and Discussionmentioning

confidence: 99%

“…Considering that three compounds have similar polyoxotungstate-based 3D silver cluster−organic frameworks, the difference in photocatalytic activity may be related to their energy band structure, which usually plays a decisive role in the photocatalytic performance of photocatalysts. 54,55 As shown in Figures 4d and 6a, the conduction band (CB) potential (−0.77 V vs NHE) of compound 1 is more negative than that of compounds 2 and 3 (−0.12 V vs NHE) and also negative than E(O 2 /O 2 58 This result demonstrated that it is theoretically possible for a photogenerated hole to oxidize H 2 O to O 2 , which is then reduced to H 2 O 2 and O 2…”

Section: Photocatalysis Propertiesmentioning

confidence: 99%

Three-Dimensional Silver-Containing Polyoxotungstate Frameworks for Photocatalytic Aerobic Oxidation of Benzyl Alcohol

Zhang

Wang

et al. 2022

Inorg. Chem.

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Photocatalytic organic transformation derived by functionalized polyoxometalate (POM)-based metal−organic frameworks provides a feasible route for fine chemical synthesis. Herein, three kinds of photoactive threedimensional silver-containing polyoxotungstate frameworks are synthesized with the formulasIn compounds 1−3, the cationic Ag−triazole clusters with diverse nuclei serve as nodes to assemble with rigid bridging ligands (L) and polyoxoanions to extend into stable three-dimensional frameworks, in which Keggin-type anions act as guests or pendants. When using them as heterogeneous photocatalysts, compounds 1−3 show high catalytic activity and selectivity for the photocatalytic aerobic oxidation of benzyl alcohol to benzoic acid under 10 W 365 nm light irradiation. Among them, compound 1 exhibits the highest performance with ca. 99% benzyl alcohol conversion and 99% selectivity of benzoic acid in 9 h. Compounds 2 and 3 show ca. 79 and 88% conversions of benzyl alcohol, respectively, which are higher than those of the individual Keggin-type precursors. Moreover, mechanism investigation suggests that the synergistic cooperation occurring between cationic Ag−triazole clusters and Keggin-type polyoxoanions modulates the energy band structures of compounds 1−3, resulting in the efficient separation of photogenerated carriers and accelerating the aerobic oxidation of benzyl alcohol. This work provides some important guidance for the design and development of efficient POM-based photocatalysts for practical organic transformation.

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“…Furthermore, post-transition metals possess greater bond covalency and directional bonding, − influencing their coordination chemistry and thus heterogeneous interactions at the semiconductor–solution interface. Indeed, In 2 O 3 has been explored for photocatalytic carbon dioxide reduction, hydrogen production, and pollutant degradation, while Ga 2 O 3 has been observed to catalyze water splitting and volatile organic compound degradation . These examples utilizing M 3+ -containing semiconductors provide further support in exploring trivalent bismuth metal oxides.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Petitjeanite Bi₃O(OH)(PO₄)₂ Photocatalytic Microparticles: Effect of Synthetic Conditions on the Crystal Structure and Activity toward Degradation of Aqueous Perfluorooctanoic Acid (PFOA)

Bentel

Mason

Cates

2023

ACS Appl. Mater. Interfaces

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The discovery of synthetic Bi 3 O(OH)(PO 4 ) 2 [BOHP] and its application toward photocatalytic oxidation of the water contaminant perfluorooctanoic acid (PFOA) have prompted further interest in development. Despite its high activity toward PFOA degradation, the scarce appearance in the literature and lack of research have left a knowledge gap in the understanding of BOHP synthesis, formation, and photocatalytic activity. Herein, we explore the crystallization of BOHP microparticles via hydrothermal syntheses, focusing on the influence of ions and organics present in the reaction solution when using different hydroxide amendments (NaOH, NH 4 OH, NMe 4 OH, and NEt 4 OH). To better understand the unique structure−activity aspects of BOHP, the related bismuth oxy phosphate (BOP) structural family was also explored, including A-BOP (A = Na + and K + ) and M-BOP derivatives (M = Ca 2+ , Sr 2+ , and Pb 2+ ). Results from materials characterization, including Xray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy, indicated that the crystal structure, morphology, and atomic composition were significantly influenced by solution pH, inorganic metal cations (Na + , K + , Ca 2+ , Sr 2+ , and Pb 2+ ), and organic amines. Experiments involving ultraviolet photocatalytic destruction of PFOA by a BOHP suspension revealed that catalytic activity was influenced by the choice of reagents and their variable effect on surface facet growth and crystal defects in the resulting microparticles. Together, this work provides a strategy for crystal facet and surface defect engineering with the potential to expand to other metal oxides within the hydrothermal system.

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Current trends on In2O3 based heterojunction photocatalytic systems in photocatalytic application

Cited by 103 publications

References 121 publications

In₂O₃ Nanoparticle/Bi₄O₅Br₂ Nanosheet S-Scheme Heterojunctions with Interfacial Oxygen Vacancies for Photocatalytic Degradation of Tetracycline

In₂O₃ Nanoparticle/Bi₄O₅Br₂ Nanosheet S-Scheme Heterojunctions with Interfacial Oxygen Vacancies for Photocatalytic Degradation of Tetracycline

Three-Dimensional Silver-Containing Polyoxotungstate Frameworks for Photocatalytic Aerobic Oxidation of Benzyl Alcohol

Synthesis of Petitjeanite Bi₃O(OH)(PO₄)₂ Photocatalytic Microparticles: Effect of Synthetic Conditions on the Crystal Structure and Activity toward Degradation of Aqueous Perfluorooctanoic Acid (PFOA)

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Current trends on In2O3 based heterojunction photocatalytic systems in photocatalytic application

Cited by 103 publications

References 121 publications

In2O3 Nanoparticle/Bi4O5Br2 Nanosheet S-Scheme Heterojunctions with Interfacial Oxygen Vacancies for Photocatalytic Degradation of Tetracycline

In2O3 Nanoparticle/Bi4O5Br2 Nanosheet S-Scheme Heterojunctions with Interfacial Oxygen Vacancies for Photocatalytic Degradation of Tetracycline

Three-Dimensional Silver-Containing Polyoxotungstate Frameworks for Photocatalytic Aerobic Oxidation of Benzyl Alcohol

Synthesis of Petitjeanite Bi3O(OH)(PO4)2 Photocatalytic Microparticles: Effect of Synthetic Conditions on the Crystal Structure and Activity toward Degradation of Aqueous Perfluorooctanoic Acid (PFOA)

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In₂O₃ Nanoparticle/Bi₄O₅Br₂ Nanosheet S-Scheme Heterojunctions with Interfacial Oxygen Vacancies for Photocatalytic Degradation of Tetracycline

In₂O₃ Nanoparticle/Bi₄O₅Br₂ Nanosheet S-Scheme Heterojunctions with Interfacial Oxygen Vacancies for Photocatalytic Degradation of Tetracycline

Synthesis of Petitjeanite Bi₃O(OH)(PO₄)₂ Photocatalytic Microparticles: Effect of Synthetic Conditions on the Crystal Structure and Activity toward Degradation of Aqueous Perfluorooctanoic Acid (PFOA)