Defect as the essential factor in engineering carbon-nitride-based visible-light-driven Z-scheme photocatalyst

Wang, Sicong; Teng, Zhenyuan; Xu, Yanqi; Ye, Meng; Zhong, Yunhao; Liu, Sixiao; Wang, Chengyin; Wang, Guoxiu; Ohno, Teruhisa

doi:10.1016/j.apcatb.2019.118145

Cited by 64 publications

(19 citation statements)

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“…[28,29] For addressing these challenges, various strategies have been adopted so as to improve the photocatalytic performance of the original g-C 3 N 4 , such as nanostructure design, [30][31][32] doping of metallic and nonmetallic elements, [33][34][35][36] construction of heterojunctions, [37][38][39][40] copolymerization, [41][42][43] defect engineering, and dye sensitization. [44,45] Among them, the controllable synthesis of nanoscale morphology is one of the resultful means. Because of its characteristics including appropriate porosity, massive surface groups for anchoring, large specific surface area, slim thickness and as well as high aspect ratio, semiconductor nanosheets describe a brilliant future.…”

mentioning

confidence: 99%

Ultrathin 2D/2D ZnIn₂S₄/g‐C₃N₄ Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light

Dang

Xie

Dai

et al. 2021

Adv Materials Inter

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hydrogen combustion only produces water. Therefore, hydrogen as a promising energy for the future development can help to meet the future energy needs and solve environmental problems. [4,5] Semiconductor-based photocatalytic water splitting utilizing renewable solar energy for hydrogen production is considered to be a feasible technology with great promise. [6][7][8][9] According to the research of titanium dioxide (TiO 2 ) single crystal in photoelectrochemistry, Fujishima and Honda [10] pioneered the field of semiconductor photocatalysis. However, the wide band gap of metal oxide such as ZnO, [11][12][13][14] SnO 2 , [15][16][17][18] Nb 2 O 5 , [19][20][21] etc., makes them only respond to near-ultraviolet or ultraviolet light, resulting in low efficiency of solar energy. In fact, visible light accounts for 43% of sunlight, while ultraviolet ray accounts for merely 4%. Therefore, developing visible light-driven photocatalysts attracts widespread attention for purpose of making better use of solar energy. [22][23][24] Graphite carbon nitride (g-C 3 N 4 ) is an attractive nonmetallic conjugated polymer semiconductor, which has been extensively applied in photocatalytic water splitting because of its attractive electronic structure, excellent thermal and chemical stability, unique 2D layered structure, suitable band gap, low toxicity, etc. [25][26][27] However, the actual application of the original g-C 3 N 4 still suffers from the limitations of underutilization of visible light, lacking of catalytic active sites, hydrophobic surface, low carrier mobility, and rapid recombination of photoinduced carriers. [28,29] For addressing these challenges, various strategies have been adopted so as to improve the photocatalytic performance of the original g-C 3 N 4 , such as nanostructure design, [30][31][32] doping of metallic and nonmetallic elements, [33][34][35][36] construction of heterojunctions, [37][38][39][40] copolymerization, [41][42][43] defect engineering, and dye sensitization. [44,45] Among them, the controllable synthesis of nanoscale morphology is one of the resultful means. Because of its characteristics including appropriate porosity, massive surface groups for anchoring, large specific surface area, slim thickness and as well as high aspect ratio, semiconductor nanosheets describe a brilliant future. [46] Therefore, 2D g-C 3 N 4 nanosheets may significantly improve the photocatalytic activity. [47,48] Besides, integration with other semiconductors to build heterojunctions is considered to be a reliable means. [49][50][51] Ultrathin 2D/2D heterostructures usually Designation of high-efficiency water splitting photocatalyst is still a challenge in converting solar energy into chemical fuels. Heterojunction can inhibit recombination of carriers which is considered to be a reliable strategy to improve photocatalytic performance on water splitting. In this work, a "face-to-face" 2D tight heterostructure is constructed by growing ZnIn 2 S 4 nanosheets on g-C 3 N 4 nanosheets. Due to the ultrathin 2D structure...

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confidence: 99%

Ultrathin 2D/2D ZnIn₂S₄/g‐C₃N₄ Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light

Dang

Xie

Dai

et al. 2021

Adv Materials Inter

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“…In addition, according to the BET results (Figure S2), P-g-C 3 N 4 showed a larger specific surface area than g-C 3 N 4 in our previous work. [24] In combination with above, P-g-C 3 N 4 can be used as a substrate to disperse easily agglomerated nanomaterials and it can absorb more O 2 , promote the reduction reaction of O 2 , and produce more * O 2…”

Section: Resultsmentioning

confidence: 99%

Construction of a 2D Layered Phosphorus‐doped Graphitic Carbon Nitride/BiOBr Heterojunction for Highly Efficient Photocatalytic Disinfection

Che

Zhou

Zhang

et al. 2022

Chemistry An Asian Journal

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Infectious diseases caused by bacteria intimidate the health of human beings all over the world. Although many avenues have been tried, various operating conditions limit their actual applications. Photocatalytic nanomaterials are becoming candidates to be competent for water purification. Here, a novel and more efficient S‐scheme has been engineered between two dimensional (2D) layered phosphorus‐doped graphitic carbon nitride (P‐g‐C3N4) and BiOBr via hydrothermal polymerization to inhibit the recombination of charge and broaden light absorption. The as‐prepared P‐g‐C3N4/BiOBr hybrids exhibits significantly improved photocatalytic disinfection contrast to g‐C3N4/BiOBr in visible wavelengths, suggesting phosphorus doping which adjusts the band structure plays a significant role in the S‐scheme system. And the sterilization rate of multidrug‐resistant Acinetobacter baumannii 28 (AB 28) was 99.9999% within 80 min and Staphylococcus aureus (S. aureus) was 99.9%.

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“…Sub-gap photovoltage features have been detected, attributed to defect energy levels in the middle of the unusual band gap. Wang et al [72] pioneered a methodology utilizing this kind of thermal defects in g-C 3 N 4 to design a novel and efficient Z-scheme heterojunction. Such sub-gaps provide a pathway for charge carrier recombination, to enable the type II heterojunction to transform into a Z-scheme type, with better photocatalytic performance for degradation.…”

Section: Defect Chemistrymentioning

confidence: 99%

“…Sub‐gap photovoltage features have been detected, attributed to defect energy levels in the middle of the unusual band gap. Wang et al . pioneered a methodology utilizing this kind of thermal defects in g‐C 3 N 4 to design a novel and efficient Z‐scheme heterojunction.…”

Section: Photocatalysis Materials and Modifications For Aopsmentioning

confidence: 99%

Photocatalytic Advanced Oxidation Processes for Water Treatment: Recent Advances and Perspective

Liu

Wang

2020

Chemistry An Asian Journal

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141

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Nowadays, an ever-increasing variety of organic contaminants in water has caused hazards to the ecological environment and human health. Many of them are persistent and non-biodegradable. Various techniques have been studied for sewage treatment, including biological, physical and chemical methods. Photocatalytic advanced oxidation processes (AOPs) have received increasing attention due to their fast reaction rates and strong oxidation capability, low cost compared with the non-photolytic AOPs. This review is dedicated to summarizing up-to-date research progress in photocatalytic AOPs, such as Fenton or Fenton-like reaction, ozonation and sulfate radical-based advanced oxidation processes. Mechanisms and activation processes are discussed. Then, the paper summarizes photocatalytic materials and modification strategies, including defect chemistry, morphology control, heterostructure design, noble metal deposition. The future perspectives and challenges are also discussed.

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Defect as the essential factor in engineering carbon-nitride-based visible-light-driven Z-scheme photocatalyst

Cited by 64 publications

References 64 publications

Ultrathin 2D/2D ZnIn₂S₄/g‐C₃N₄ Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light

Ultrathin 2D/2D ZnIn₂S₄/g‐C₃N₄ Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light

Construction of a 2D Layered Phosphorus‐doped Graphitic Carbon Nitride/BiOBr Heterojunction for Highly Efficient Photocatalytic Disinfection

Photocatalytic Advanced Oxidation Processes for Water Treatment: Recent Advances and Perspective

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Defect as the essential factor in engineering carbon-nitride-based visible-light-driven Z-scheme photocatalyst

Cited by 64 publications

References 64 publications

Ultrathin 2D/2D ZnIn2S4/g‐C3N4 Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light

Ultrathin 2D/2D ZnIn2S4/g‐C3N4 Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light

Construction of a 2D Layered Phosphorus‐doped Graphitic Carbon Nitride/BiOBr Heterojunction for Highly Efficient Photocatalytic Disinfection

Photocatalytic Advanced Oxidation Processes for Water Treatment: Recent Advances and Perspective

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Ultrathin 2D/2D ZnIn₂S₄/g‐C₃N₄ Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light

Ultrathin 2D/2D ZnIn₂S₄/g‐C₃N₄ Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light