Interfacial chemical bond and oxygen vacancies modulated Mo2S3/BiOBr high-low junctions for enhanced photocatalysis gatifloxacin degradation

Zhang, Xi; Zhang, Ju; Zha, Xin; Luo, Yu; Hu, Yu; Chen, Guoning; He, Xipu

doi:10.1016/j.apsusc.2023.158548

Cited by 7 publications

(5 citation statements)

References 60 publications

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“…The XRD pattern of the Mo 2 S 3 catalyst (Figure b) is in close agreement with the monoclinic crystal structure (JCPDS card no. 65-6963), with distinct peaks at 16.25°, 31.7°, 35.09°, 40.08°, 53.36°, 57.55°, and 60.11° corresponding to the (−101), (110), (−201), (112), (−311), (213), and (−121) crystallographic planes, with corresponding interplanar spacings ( d ) of 5.444, 2.819, 3.016, 2.243, 1.716, 1.600, and 1.539 Å, respectively . As shown in Figure c, the XRD signature of Mo 2 S 3 proves the successful synthesis of the single catalyst because it is in accordance with reported literature values.…”

Section: Resultsmentioning

confidence: 99%

“…13 The XRD pattern of the Mo 2 S 3 catalyst (Figure 1b) is in close agreement with the monoclinic crystal structure (JCPDS card no. 65-6963), with distinct peaks at 16 14 As shown in Figure 1c, the XRD signature of Mo 2 S 3 proves the successful synthesis of the single catalyst because it is in accordance with reported literature values. After the incorporation of CuInS 2 into Mo 2 S 3 to form composite catalysts, the crystallinity of Mo 2 S 3 increases after the composite.…”

Section: Resultsmentioning

confidence: 99%

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Directional Electron Transfer in CuInS₂/Mo₂S₃ S-Scheme Heterojunctions for Efficient Photocatalytic Hydrogen Production

Yang,

Jin,

Pan

et al. 2024

ACS Appl. Mater. Interfaces

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The photocatalytic conversion of solar energy to hydrogen is a promising pathway toward clean fuel production, yet it requires advancement to meet industrial-scale demands. This study demonstrates that the interface engineering of heterojunctions is a viable strategy to enhance the photocatalytic performance of CuInS 2 /Mo 2 S 3 . Specifically, CuInS 2 nanoparticles are incorporated into Mo 2 S 3 nanospheres via a wet impregnation technique to form an S-scheme heterojunction. This configuration facilitates directional electron transfer, optimizing electron utilization and fostering efficient photocatalytic processes. The presence of an S-scheme heterojunction in CuInS 2 /Mo 2 S 3 is corroborated by in situ irradiation X-ray photoelectron spectroscopy and density functional theory analyses, which confirm the directional movement of electrons at the interface of heterojunction. Comprehensive characterization of the heterojunction photocatalyst, including phase, structural, and photoelectric property assessments, reveals a significant specific surface area and light absorption capability. These attributes augment the number of active sites available in CuInS 2 /Mo 2 S 3 for proton reduction reactions. This study offers a pragmatic approach for designing metal sulfide-based photocatalysts via strategic interface engineering, potentially advancing the field toward sustainable hydrogen production.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Directional Electron Transfer in CuInS₂/Mo₂S₃ S-Scheme Heterojunctions for Efficient Photocatalytic Hydrogen Production

Yang,

Jin,

Pan

et al. 2024

ACS Appl. Mater. Interfaces

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“…The four peaks at 528.98, 530.06, 530.98, and 532.47 eV represent [Bi 2 O 2 ] 2+ , Ti-O-Ti, surface -OH groups, and Si-O-Si, respectively [3]. In Figure 3e, two peaks are observed at 68.21 and 69.27 eV, corresponding to Br 3d 5/2 and Br 3d 3/2 , respectively, suggesting the presence of Br −1 in BiOBr [37]. The Si 2p spectrum shown in Figure 3f is observed at 103.16 eV, indicating the presence of SiO 2 in attapulgite [38].…”

Section: Surface Chemical State Analysismentioning

confidence: 96%

Visible-Light-Driven BiOBr-TiO2-Attapulgite Photocatalyst with Excellent Photocatalytic Activity for Multiple Xanthates

Qi,

Zhao,

Jiang

et al. 2023

Catalysts

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The novel ternary composites BiOBr-TiO2-attapulgite (BTA) were synthesized using a simple hydrothermal and water-bath method, exhibiting excellent photocatalytic performance to multiple xanthates. For the BTA photocatalyst, TiO2 and BiOBr were uniformly loaded onto the surface of acid-activated attapulgite. As a widely used collector in mining processes, sodium ethyl-xanthate (SEX) was selected as the target pollutant due to its high toxicity. The BTA ternary photocatalyst demonstrated significantly higher adsorption and photocatalytic degradation performance compared to TiO2 nanoparticles, BiOBr nanosheets, and BiOBr-TiO2 heterojunction. Structural characterization and experimental results indicated that the exceptional photocatalytic degradation efficiency of BTA was mainly attributed to the formation of a heterojunction between BiOBr and TiO2, as well as the presence of additional active adsorption sites provided by attapulgite. Free radical scavenging experiments and EPR results confirmed that the photogenerated holes were the predominant active species in photodegrading SEX throughout the entire experiment. The LC-MS results provided insight into potential degradation pathways of SEX. This research demonstrates that BTA, as a novel triple composite material, achieves rapid and complete degradation to 20 mg/L SEX within 20 min. This work presents a novel approach to synthesize mineral-based photocatalysts, which have broad prospects for application in flotation wastewater treatment.

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“…26 Meanwhile, as the electron traps, OVs can also suppress the recombination of photogenerated e − −h + pairs. 27 Therefore, the heterojunctions incorporated with OVs can extend the light response range of the BiOBr photocatalyst and increase the separation efficiency of photogenerated e − −h + pairs. 28 In addition to these, it has been reported that OVs could mediate O 2 to generate singlet oxygen ( 1 O 2 ), which is an important reactive species for various applications including the oxidative decomposition of organic pollutants.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Moreover, the introduction of vacancy defects into a heterojunction is an effective strategy for synergistically increasing its photocatalytic activity. , The vacancies, such as oxygen vacancies (OVs), can effectively regulate the electronic band structure in BiOBr, thus changing the transport pathway of photogenerated e – –h + pairs and improving their separation efficiency . Meanwhile, as the electron traps, OVs can also suppress the recombination of photogenerated e – –h + pairs . Therefore, the heterojunctions incorporated with OVs can extend the light response range of the BiOBr photocatalyst and increase the separation efficiency of photogenerated e – –h + pairs .…”

Section: Introductionmentioning

confidence: 99%

Photocatalysis Meets Piezoelectricity in a Type-I Oxygen Vacancy-Rich BaTiO₃/BiOBr Heterojunction: Mechanism Insights from Characterizations to DFT Calculations

Xu,

Shan

et al. 2024

Inorg. Chem.

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It is a challenging task to design a piezoelectric photocatalyst with excellent performance under mechanical agitation instead of ultrasonic irradiation. Integrating vacancy defects into a heterojunction seems to be an effective strategy for synergistically increasing its piezo-photocatalytic performance. For this goal, a two-step hydrothermal method was adopted to architect a type-I oxygen-vacancy-rich BaTiO3/BiOBr heterojunction to surge the degradation of Rhodamine B (RhB) under the combined action of simulated sunlight irradiation and mechanical agitation. Various instrumental techniques demonstrated the formation of a BaTiO3/BiOBr heterojunction with high crystallinity. The existence of surface oxygen vacancies was confirmed by XPS and EPR tests. PFM results manifested that this heterojunction had excellent piezoelectric properties, with a piezoelectric response value of 30.31 pm V–1. Comparative experiments indicated that RhB degradation efficiency under piezo-photocatalysis over this heterojunction largely exceeded the total sum of those under piezocatalysis and photocatalysis. h+, ·O2 –, and 1O2 were the dominant reactive species for RhB degradation. The improved separation efficiency of photogenerated charges was verified by electrochemical measurements. DFT calculations indicated that the polarization of BaTiO3 could affect the electronic band structure of BiOBr. This work will provide comprehensive insights into piezo-photocatalytic mechanism at a microcosmic level and help to develop new-styled piezoelectric photocatalysts.

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Interfacial chemical bond and oxygen vacancies modulated Mo2S3/BiOBr high-low junctions for enhanced photocatalysis gatifloxacin degradation

Cited by 7 publications

References 60 publications

Directional Electron Transfer in CuInS₂/Mo₂S₃ S-Scheme Heterojunctions for Efficient Photocatalytic Hydrogen Production

Directional Electron Transfer in CuInS₂/Mo₂S₃ S-Scheme Heterojunctions for Efficient Photocatalytic Hydrogen Production

Visible-Light-Driven BiOBr-TiO2-Attapulgite Photocatalyst with Excellent Photocatalytic Activity for Multiple Xanthates

Photocatalysis Meets Piezoelectricity in a Type-I Oxygen Vacancy-Rich BaTiO₃/BiOBr Heterojunction: Mechanism Insights from Characterizations to DFT Calculations

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Interfacial chemical bond and oxygen vacancies modulated Mo2S3/BiOBr high-low junctions for enhanced photocatalysis gatifloxacin degradation

Cited by 7 publications

References 60 publications

Directional Electron Transfer in CuInS2/Mo2S3 S-Scheme Heterojunctions for Efficient Photocatalytic Hydrogen Production

Directional Electron Transfer in CuInS2/Mo2S3 S-Scheme Heterojunctions for Efficient Photocatalytic Hydrogen Production

Visible-Light-Driven BiOBr-TiO2-Attapulgite Photocatalyst with Excellent Photocatalytic Activity for Multiple Xanthates

Photocatalysis Meets Piezoelectricity in a Type-I Oxygen Vacancy-Rich BaTiO3/BiOBr Heterojunction: Mechanism Insights from Characterizations to DFT Calculations

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Directional Electron Transfer in CuInS₂/Mo₂S₃ S-Scheme Heterojunctions for Efficient Photocatalytic Hydrogen Production

Directional Electron Transfer in CuInS₂/Mo₂S₃ S-Scheme Heterojunctions for Efficient Photocatalytic Hydrogen Production

Photocatalysis Meets Piezoelectricity in a Type-I Oxygen Vacancy-Rich BaTiO₃/BiOBr Heterojunction: Mechanism Insights from Characterizations to DFT Calculations