Fabrication of g-C3N4/Ag3PO4-H2O2 heterojunction system with enhanced visible-light photocatalytic activity and mechanism insight

Jia, Jiankui; Huang, Wenxin; Feng, Changsheng; Zhang, Zheng; Zuojiao, Kaichao; Liu, Jiaxun; Jiang, Caiyun; Wang, Yuping

doi:10.1016/j.jallcom.2019.03.238

Cited by 36 publications

(8 citation statements)

References 54 publications

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“…After coupling with BiOCl, the BiOCl/CNs composite shows significantly light absorption enhancement than BiOCl, owing to the successful combination between BiOCl and CNs. [21] The interaction between BiOCl and CNs formed Schottky barrier, which nduced the band bending thus adjust the band gap. [19a] The Eg of CNs, BiOCl and BiOCl/CNs-5 materials are obtained by calculation (Table 1).…”

Section: Resultsmentioning

confidence: 99%

One‐Step Fabrication of 2D/2D Z‐Scheme BiOCl/g‐C₃N₄ Nanosheets Heterojunction for Efficient Degradation of RhB and Cr(VI) Ions Reduction under Visible‐Light Illumination

Liu

Zuo

et al. 2021

ChemistrySelect

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To promote the utilization efficiency of solar energy, a one‐step strategy to fabricate 2D/2D Z‐scheme BiOCl/g‐C3N4 nanosheets (BiOCl/CNs) heterojunction through the in‐situ growth of BiOCl on CNs was studied. Here, we report that ultrathin CNs with wrinkled surface are prepared by a rapid cooling method. The wrinkled surface of CNs provided more active sites for BiOCl to anchor on it thus facilitating the formation of the tight heterojunction structure via a solvothermal process. The as‐prepared BiOCl/CNs hybrid photocatalysts was confirmed by various physicochemical characterizations. The results showed the uniform distribution of BiOCl nanoflakes on g‐C3N4 nanosheets and formation of 2D/2D Z‐scheme heterojunction structure. The as‐prepared BiOCl/CNs‐5 photocatalyst displays extraordinarily photocatalytic activity for the photocatalytic degradation of RhB and Cr(VI) reduction under visible light irradiation, about 94 % RhB and 93 % Cr(VI) was degraded in 100 min. The remarkable photocatalytic properties were attributed to the Z‐scheme hierarchical structure, large specific surface and efficient charge carrier separation. Furthermore, the Z‐scheme photocatalytic reaction mechanism was presented to elucidate the improved photocatalytic activity of BiOCl/CNs photocatalyst. The photodegradation of phenol and radical species trapping experiments were conducted to prove the formation of Z‐scheme. This work provides a facile route for the construction of g‐C3N4 based Z‐scheme structure photocatalyst for efficient visible light photocatalytic performance.

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Section: Resultsmentioning

confidence: 99%

One‐Step Fabrication of 2D/2D Z‐Scheme BiOCl/g‐C₃N₄ Nanosheets Heterojunction for Efficient Degradation of RhB and Cr(VI) Ions Reduction under Visible‐Light Illumination

Liu

Zuo

et al. 2021

ChemistrySelect

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“…Moreover, the VB and CB potentials of Ta 2 O 5 and TiO 2 can be calculated by the following empirical equations:

E_{VB} = χ - E_{0} + 0.5 E_{bg}

E_{CB} = E_{VB} - E_{bg},

where E VB and E CB are the energies of the VB and CB potentials, respectively, E 0 (4.5 eV) is the free electron energy of the normal hydrogen electrode. The χ value is the absolute electronegativity of semiconductor sonocatalysts (6.23 eV for Ta 2 O 5 and 5.66 eV for TiO 2 , respectively).…”

Section: Resultsmentioning

confidence: 99%

Construction of Z‐scheme Pt‐TiO₂/(Er³⁺:Y₃Al₅O₁₂@Ta₂O₅)/HAP and its application in sonocatalytic degradation of prometryn and disinfection of Escherichia coli

Cao

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: The recovery and reuse of sonocatalysts are the pivotal issues in the sonocatalytic degradation of organic pollutants. The use of some natural minerals as the carrier is not only beneficial to recycling of sonocatalysts, but also reduces the treatment costs of organic pollutants. Two kinds of hydroxyapatite (HAP), Ox Bone (OB)-HAP and synthesized (Syn)-HAP combine with the Pt-TiO 2 /(Er 3+ :Y 3 Al 5 O 12 @Ta 2 O 5 ) (P-TET) composite, obtaining two Z-scheme sonocatalysts, P-TET/OB-HAP and P-TET/Syn-HAP, respectively. The sonocatalytic activities of the prepared samples are investigated via degradation of prometryn and disinfection of Escherichia coli.RESULTS: A series of characterizations showed that the Z-scheme P-TET/(OB or Syn)-HAP sonocatalysts were prepared successfully. To evaluate their sonocatalytic activities, some influencing factors such as ultrasonic irradiation time, inorganic oxidants, used times and trapping agents on the sonocatalytic degradation prometryn were determined. The best degradation ratio (80.31% based on N computing and 85.07% based on S atom computing) of prometryn could be obtained for 10 mmol L −1 K 2 S 2 O 8 , 1.0 g L −1 P-TET/OB-HAP sonocatalyst and 150 min ultrasonic irradiation. The excellent sonocatalytic disinfection ratio (88.65%) of E. coli could also be obtained under 40 min ultrasound irradiation. Moreover, a possible mechanism on sonocatalytic degradation of prometryn was illustrated.CONCLUSION: The treated bovine bone HAP was directly used as a carrier to combine with P-TET to construct a novel Z-scheme P-TET/OB-HAP sonocatalyst. The high degradation ratio of prometryn and disinfection ratio of E. coli showed that P-TET/OB-HAP could be a promising sonocatalyst for the degradation of organic pollutants and the disinfection of bacteria.

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“…9 Among various kinds of photocatalyst, g-C 3 N 4 , because of its unique features, such as a suitable bandgap for light harvesting, facile preparation process, favorable heat and chemical stability and metal-free characteristics, [10][11][12] has attracted extensive interest in photocatalytic production of H 2 (ref. [13][14][15][16] and H 2 O 2 , [17][18][19] nitrogen xation, [20][21][22] organic pollutants decomposition, [23][24][25] CO 2 reduction [26][27][28] and organic reactions. 29,30 However, several shortcomings, such as a narrow light absorption range, serious recombination of photogenerated charge carriers and low surface charge transfer efficiency still exist in g-C 3 N 4 , which limit its photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Growth of narrow-bandgap Cl-doped carbon nitride nanofibers on carbon nitride nanosheets for high-efficiency photocatalytic H₂O₂ generation

Guo

Liu

et al. 2021

RSC Adv.

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Fabrication of g-C3N4/Ag3PO4-H2O2 heterojunction system with enhanced visible-light photocatalytic activity and mechanism insight

Cited by 36 publications

References 54 publications

One‐Step Fabrication of 2D/2D Z‐Scheme BiOCl/g‐C₃N₄ Nanosheets Heterojunction for Efficient Degradation of RhB and Cr(VI) Ions Reduction under Visible‐Light Illumination

One‐Step Fabrication of 2D/2D Z‐Scheme BiOCl/g‐C₃N₄ Nanosheets Heterojunction for Efficient Degradation of RhB and Cr(VI) Ions Reduction under Visible‐Light Illumination

Construction of Z‐scheme Pt‐TiO₂/(Er³⁺:Y₃Al₅O₁₂@Ta₂O₅)/HAP and its application in sonocatalytic degradation of prometryn and disinfection of Escherichia coli

Growth of narrow-bandgap Cl-doped carbon nitride nanofibers on carbon nitride nanosheets for high-efficiency photocatalytic H₂O₂ generation

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Fabrication of g-C3N4/Ag3PO4-H2O2 heterojunction system with enhanced visible-light photocatalytic activity and mechanism insight

Cited by 36 publications

References 54 publications

One‐Step Fabrication of 2D/2D Z‐Scheme BiOCl/g‐C3N4 Nanosheets Heterojunction for Efficient Degradation of RhB and Cr(VI) Ions Reduction under Visible‐Light Illumination

One‐Step Fabrication of 2D/2D Z‐Scheme BiOCl/g‐C3N4 Nanosheets Heterojunction for Efficient Degradation of RhB and Cr(VI) Ions Reduction under Visible‐Light Illumination

Construction of Z‐scheme Pt‐TiO2/(Er3+:Y3Al5O12@Ta2O5)/HAP and its application in sonocatalytic degradation of prometryn and disinfection of Escherichia coli

Growth of narrow-bandgap Cl-doped carbon nitride nanofibers on carbon nitride nanosheets for high-efficiency photocatalytic H2O2 generation

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One‐Step Fabrication of 2D/2D Z‐Scheme BiOCl/g‐C₃N₄ Nanosheets Heterojunction for Efficient Degradation of RhB and Cr(VI) Ions Reduction under Visible‐Light Illumination

One‐Step Fabrication of 2D/2D Z‐Scheme BiOCl/g‐C₃N₄ Nanosheets Heterojunction for Efficient Degradation of RhB and Cr(VI) Ions Reduction under Visible‐Light Illumination

Construction of Z‐scheme Pt‐TiO₂/(Er³⁺:Y₃Al₅O₁₂@Ta₂O₅)/HAP and its application in sonocatalytic degradation of prometryn and disinfection of Escherichia coli

Growth of narrow-bandgap Cl-doped carbon nitride nanofibers on carbon nitride nanosheets for high-efficiency photocatalytic H₂O₂ generation