Ag2CrO4/g-C3N4/graphene oxide ternary nanocomposite Z-scheme photocatalyst with enhanced CO2 reduction activity

Xu, Dongdong; Cheng, Bei; Wang, Weikang; Jiang, Chuanjia

doi:10.1016/j.apcatb.2018.03.036

Cited by 487 publications

(148 citation statements)

References 73 publications

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“…These results indicate that the enhancemento fp hotocurrent is not only due to the enhanced light absorption, but also highly related to the vacancy type, where bismuth vacancy-related defects promote the generation of efficient photoinduced electrons. [27] However,v ariations of steady-state PL intensity and average lifetimeb etween BS-1 and BS-5 ares mall,i ndicatingt hat, as fort he obtained Bi 2 S 3 ,b ismuth vacanciesh ad ap ositivee ffectb ut sulfur vacanciesh aven oe ffect or an egative effect on suppressing the recombination rate. The charge transportation and separation of the photogeneratedc harges were furthers tudied by time-resolved transient and steady-state photoluminescence (PL) spectroscopy.…”

Section: Resultsmentioning

confidence: 85%

Defect‐Type‐Dependent Near‐Infrared‐Driven Photocatalytic Bacterial Inactivation by Defective Bi₂S₃ nanorods

Sun

Jiang

et al. 2019

ChemSusChem

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Defect engineering is crucial in tailoring photocatalytic efficiency, but it suffers from uncertainty in determining the vacancy type and in which type of the vacancy can better promote the photocatalytic efficiency. In this study, Bi2S3 nanorods with bismuth or sulfur vacancies were synthesized to investigate their distinct effects on the electronic structure, electron–hole separation characteristics, and near‐infrared (NIR)‐driven photocatalytic bacterial inactivation activity. Both bismuth and sulfur vacancies can enhance the light absorption ability of Bi2S3. However, the lifetime of photoinduced electrons is extended by bismuth vacancies but shortened by sulfur vacancies. Owing to these tendencies, Bi2S3 with Bi vacancies fully inactivated 7 log E. coli cells within 40 min of NIR irradiation, displaying better NIR‐driven photocatalytic bacterial inactivation efficiency than Bi2S3 with S vacancies. This study discloses the defect‐type‐dependent photocatalytic behaviors, providing new insights into designing highly efficient photocatalysts.

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Section: Resultsmentioning

confidence: 85%

Defect‐Type‐Dependent Near‐Infrared‐Driven Photocatalytic Bacterial Inactivation by Defective Bi₂S₃ nanorods

Sun

Jiang

et al. 2019

ChemSusChem

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“…To confirm the successful doping of B atoms in g‐C 3 N 4 nanosheets, we further performed the Fourier‐transform infrared spectroscopy (FT‐IR) and X‐ray photoelectron spectroscopy (XPS) characterizations. As shown in Figure S2a (Supporting Information), the CN sample exhibits typical NH stretching vibrations, CN heterocycle stretching vibration and out‐of‐plane bending vibration of heptazine rings for g‐C 3 N 4 16,24. Comparatively, the typical BN vibration at ≈1370 cm −1 can be observed for the BCN, as well as the bands at 920 cm −1 are ascribed to the BNC species formed in BCN 25–27.…”

Section: Resultsmentioning

confidence: 91%

Formation of BNC Coordination to Stabilize the Exposed Active Nitrogen Atoms in g‐C₃N₄ for Dramatically Enhanced Photocatalytic Ammonia Synthesis Performance

Wang

Zhou

Liu

et al. 2020

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It is an important issue that exposed active nitrogen atoms (e.g., edge or amino N atoms) in graphitic carbon nitride (g‐C3N4) could participate in ammonia (NH3) synthesis during the photocatalytic nitrogen reduction reaction (NRR). Herein, the experimental results in this work demonstrate that the exposed active N atoms in g‐C3N4 nanosheets can indeed be hydrogenated and contribute to NH3 synthesis during the visible‐light photocatalytic NRR. However, these exposed N atoms can be firmly stabilized through forming BNC coordination by means of B‐doping in g‐C3N4 nanosheets (BCN) with a B‐doping content of 13.8 wt%. Moreover, the formed BNC coordination in g‐C3N4 not only effectively enhances the visible‐light harvesting and suppresses the recombination of photogenerated carriers in g‐C3N4, but also acts as the catalytic active site for N2 adsorption, activation, and hydrogenation. Consequently, the as‐synthesized BCN exhibits high visible‐light‐driven photocatalytic NRR activity, affording an NH3 yield rate of 313.9 µmol g−1 h−1, nearly 10 times of that for pristine g‐C3N4. This work would be helpful for designing and developing high‐efficiency metal‐free NRR catalysts for visible‐light‐driven photocatalytic NH3 synthesis.

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“…The conduction band electrons from Bi 2 W 2 O 9 can migrate to the valence band of Bi 2 S 3 due to suitable band orientation of both components. This pattern of electron migration is the characteristic features of a direct Z‐scheme heterostructure system . For the BSBWO heterostructure system, the e − and h + are populated in CB of Bi 2 S 3 and VB of Bi 2 W 2 O 9 , respectively.…”

Section: Resultsmentioning

confidence: 90%

Visible‐Light‐Assisted Photocatalytic Degradation of Phenolic Compounds Using Bi₂S₃/Bi₂W₂O₉ Heterostructure Materials as Photocatalyst

et al. 2019

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In this work, bismuth sulphide (Bi2S3)/bismuth tungstate (Bi2W2O9) heterostructure materials were prepared and studied as photocatalyst for decomposition of phenolic compounds under visible light. The Bi2S3 nanomaterial was deposited over the combustion synthesized Bi2W2O9 material using a hydrothermal procedure. The heterostructures were characterized using X‐ray diffraction (XRD), photoluminescence (PL), photoelectron spectroscopy (XPS), ultraviolet‐visible diffuse reflectance spectroscopy (UV‐Vis‐DRS), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) techniques. The presence of crystalline orthorhombic Bi2S3 and Bi2W2O9 phases was confirmed from XRD analysis. Morphologically, the heterostructure materials contained Bi2S3 nano‐rods grown uniformly over Bi2W2O9 micron size plates. The heterostructure materials displayed improved absorption features in visible region and enhanced separation of excitons. The Bi2S3/Bi2W2O9 materials displayed excellent photocatalytic activity towards the degradation of phenolic compounds from aqueous sources. Structurally diverse phenol moieties could be mineralized effectively with high efficiency (> 80%) within 2 h. The hydroxyl and superoxide radicals were identified as reactive species for phenol degradation, the formation of which was confirmed from spectroscopic analysis. The mechanism of photocatalytic degradation of phenol over the Bi2S3/Bi2W2O9 photocatalyst surface was also described.

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Ag2CrO4/g-C3N4/graphene oxide ternary nanocomposite Z-scheme photocatalyst with enhanced CO2 reduction activity

Cited by 487 publications

References 73 publications

Defect‐Type‐Dependent Near‐Infrared‐Driven Photocatalytic Bacterial Inactivation by Defective Bi₂S₃ nanorods

Defect‐Type‐Dependent Near‐Infrared‐Driven Photocatalytic Bacterial Inactivation by Defective Bi₂S₃ nanorods

Formation of BNC Coordination to Stabilize the Exposed Active Nitrogen Atoms in g‐C₃N₄ for Dramatically Enhanced Photocatalytic Ammonia Synthesis Performance

Visible‐Light‐Assisted Photocatalytic Degradation of Phenolic Compounds Using Bi₂S₃/Bi₂W₂O₉ Heterostructure Materials as Photocatalyst

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Ag2CrO4/g-C3N4/graphene oxide ternary nanocomposite Z-scheme photocatalyst with enhanced CO2 reduction activity

Cited by 487 publications

References 73 publications

Defect‐Type‐Dependent Near‐Infrared‐Driven Photocatalytic Bacterial Inactivation by Defective Bi2S3 nanorods

Defect‐Type‐Dependent Near‐Infrared‐Driven Photocatalytic Bacterial Inactivation by Defective Bi2S3 nanorods

Formation of BNC Coordination to Stabilize the Exposed Active Nitrogen Atoms in g‐C3N4 for Dramatically Enhanced Photocatalytic Ammonia Synthesis Performance

Visible‐Light‐Assisted Photocatalytic Degradation of Phenolic Compounds Using Bi2S3/Bi2W2O9 Heterostructure Materials as Photocatalyst

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Defect‐Type‐Dependent Near‐Infrared‐Driven Photocatalytic Bacterial Inactivation by Defective Bi₂S₃ nanorods

Defect‐Type‐Dependent Near‐Infrared‐Driven Photocatalytic Bacterial Inactivation by Defective Bi₂S₃ nanorods

Formation of BNC Coordination to Stabilize the Exposed Active Nitrogen Atoms in g‐C₃N₄ for Dramatically Enhanced Photocatalytic Ammonia Synthesis Performance

Visible‐Light‐Assisted Photocatalytic Degradation of Phenolic Compounds Using Bi₂S₃/Bi₂W₂O₉ Heterostructure Materials as Photocatalyst