Peroxymonosulfate enhanced visible light photocatalytic degradation bisphenol A by single-atom dispersed Ag mesoporous g-C3N4 hybrid

Wang, Yanbin; Zhao, Xu; Cao, Di; Zhu, Yongfa

doi:10.1016/j.apcatb.2017.03.079

Cited by 525 publications

(111 citation statements)

References 45 publications

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“…20,21 In recent years, lots of researchers have focused their attention on the oxone (potassium peroxymonosulfate, PMS), which is an eco-friendly and promising source to generate $SO 4À c radicals. [22][23][24][25][26][27] On the other hand, bismuth oxyhalides (BiOX, X ¼ Cl, Br and I) have been admitted as excellent adsorbents and photocatalysts for the removal of organic pollutants in the water. [28][29][30][31] The band gaps of BiOX can be within 1.7-3.4 eV by varying the halides and the composition ratios of the two halides (BiOX a -Y 1Àa ).…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous activation of peroxymonosulfate for bisphenol AF degradation with BiOI_0.5Cl_0.5

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Heterogeneous activation of peroxymonosulfate for bisphenol AF degradation with BiOI_0.5Cl_0.5

et al. 2019

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“…In addition, the XRD patterns of TiO 2 NPs, pure g-C 3 N 4 , Ag/g-C 3 N 4 NTs, Ag/TiO 2 /g-C 3 N 4 -X HNCs in Figure 5f [36]. Remarkably, the peaks of TiO 2 become stronger, while the peak intensity of g-C 3 N 4 gradually becomes weaker with increasing concentrations of the precursor Ti(SO 4 ) 2 for Ag/TiO 2 /g-C 3 N 4 heterojunction nanocomposites, suggesting that TiO 2 NPs can be continually assembled onto the Ag/g-C 3 N 4 NTs [37,38]. .…”

Section: Resultsmentioning

confidence: 95%

In Situ Construction of Ag/TiO2/g-C3N4 Heterojunction Nanocomposite Based on Hierarchical Co-Assembly with Sustainable Hydrogen Evolution

et al. 2019

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The construction of heterojunctions provides a promising strategy to improve photocatalytic hydrogen evolution. However, how to fabricate a nanoscale TiO2/g-C3N4 heterostructure and hinder the aggregation of bulk g-C3N4 using simple methods remains a challenge. In this work, we use a simple in situ construction method to design a heterojunction model based on molecular self-assembly, which uses a small molecule matrix for self-integration, including coordination donors (AgNO3), inorganic titanium source (Ti(SO4)2) and g-C3N4 precursor (melamine). The self-assembled porous g-C3N4 nanotube can hamper carrier aggregation and it provides numerous catalytic active sites, mainly via the coordination of Ag+ ions. Meanwhile, the TiO2 NPs are easily mineralized on the nanotube template in dispersive distribution to form a heterostructure via an N–Ti bond of protonation, which contributes to shortening the interfacial carrier transport, resulting in enhanced electron-hole pairs separation. Originating from all of the above synergistic effects, the obtained Ag/TiO2/g-C3N4 heterogenous photocatalysts exhibit an enhanced H2 evolution rate with excellent sustainability 20.6-fold-over pure g-C3N4. Our report provides a feasible and simple strategy to fabricate a nanoscale heterojunction incorporating g-C3N4, and has great potential in environmental protection and water splitting.

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“…Three peaks in the fitted C1s spectrum of CS/GCN with their binding energies at around 284.6, 286.1 and 287.9 eV may be assigned to the presence of sp 2 C-C bonds, C-NH x (x = 1, 2) species and C-N-C, respectively. The deconvolution of N1s spectrum of composite reveals three peaks with binding energy at 398.3, 399.6 and 400.8 eV related to sp 2 -hybridized nitrogen (C-N-C), sp 3 (CS/GCN) increasing of band gap value to 2.96 eV was observed. It is due to chemical exfoliation of GCN occurring in the first stage of CS/GCN synthesis (HNO3 treatment).…”

Section: Resultsmentioning

confidence: 95%

“…Recently, graphitic carbon nitride (g-C 3 N 4 , GCN) has received huge scientific interest due to its many advantages, including easy preparation, non-toxicity, high chemical and thermal stability, and moderate band gap leading to good visible-light response [1][2][3][4][5]. Thus, GCN is considered as a promising multifunctional catalyst for many processes such as photocatalytic decomposition of organic and inorganic pollutants, photocatalytic H 2 and O 2 evolution, CO 2 reduction and other energy conversion processes [4,6].…”

Section: Introductionmentioning

confidence: 99%

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Core/Shell Structure of Mesoporous Carbon Spheres and g-C3N4 for Acid Red 18 Decolorization

et al. 2019

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Spherical photocatalyst based on ordered mesoporous carbon and graphitic carbon nitride with core/shell structure (CS/GCN) was successfully synthesized via facile electrostatic self-assembly strategy. The photocatalytic properties of the hybrid were evaluated by the decomposition of Acid Red 18 under simulated solar light irradiation in comparison to the bulk graphitic carbon nitride (GCN). The results clearly revealed that coupling of carbon nitride with mesoporous carbon allows the catalyst to form with superior photocatalytic performance. The photoactivity of CS/GCN was over nine times higher than that of pristine GCN. Introducing mesoporous carbon into GCN induced higher surface area of the heterojunction and also facilitated the contact surface between the two phases. The synergistic effect between those two components enhanced the visible light-harvesting efficiency and improved photoinduced charge carrier generation, and consequently their proper separation. The electrochemical behavior of the obtained composite was also evaluated by electrochemical impedance, transient photocurrent response and linear sweep potentiometry measurements. The results confirmed that transport and separation of charge carriers in the hybrid was enhanced in comparison to the reference bulk graphitic carbon nitride. Detailed electrochemical, photoluminescence and radical scavenger tests enabled determination of the possible mechanism of photocatalytic process. This work presents new insights to design a core/shell hybrid through the simple preparation process, which can be successfully used as an efficient photocatalyst for the treatment of wastewater containing dyes under solar light irradiation.Catalysts 2019, 9, 1007 2 of 17 increase the surface area, the porosity in the structure of GCN can be additionally induced. Mesoporous photocatalysts received considerable research interest because they contain a special pore network, which facilitates the diffusion of the reactants and products. Moreover, the large surface area offers more active sites. Therefore, for an economical utilization of GCN, the researchers should strive to find the way for enhancing its photocatalytic properties [10,11].Up to now, different strategies, including introducing foreign elements, designing nanoporous structures, texturization, supramolecular assembly and creating effective heterojunctions, have been developed to enhance the photoactivity of GCN [12]. A large number of studies have confirmed that building a heterojunction system is an effective method to improve the separation efficiency of the photogenerated electrons and holes which dramatically improves the photocatalytic performance [13].To form an efficient heterojunction, GCN has been coupled with other semiconductors such as TiO , etc. [12,[14][15][16][17][18][19][20][21]. Unfortunately, the particles (often in the agglomerated form) were usually loaded randomly on the GCN sheets in composites causing low conjunction of GCN with a semiconductor which consequently limited charge transfer and...

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Peroxymonosulfate enhanced visible light photocatalytic degradation bisphenol A by single-atom dispersed Ag mesoporous g-C3N4 hybrid

Cited by 525 publications

References 45 publications

Heterogeneous activation of peroxymonosulfate for bisphenol AF degradation with BiOI_0.5Cl_0.5

Heterogeneous activation of peroxymonosulfate for bisphenol AF degradation with BiOI_0.5Cl_0.5

In Situ Construction of Ag/TiO2/g-C3N4 Heterojunction Nanocomposite Based on Hierarchical Co-Assembly with Sustainable Hydrogen Evolution

Core/Shell Structure of Mesoporous Carbon Spheres and g-C3N4 for Acid Red 18 Decolorization

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Peroxymonosulfate enhanced visible light photocatalytic degradation bisphenol A by single-atom dispersed Ag mesoporous g-C3N4 hybrid

Cited by 525 publications

References 45 publications

Heterogeneous activation of peroxymonosulfate for bisphenol AF degradation with BiOI0.5Cl0.5

Heterogeneous activation of peroxymonosulfate for bisphenol AF degradation with BiOI0.5Cl0.5

In Situ Construction of Ag/TiO2/g-C3N4 Heterojunction Nanocomposite Based on Hierarchical Co-Assembly with Sustainable Hydrogen Evolution

Core/Shell Structure of Mesoporous Carbon Spheres and g-C3N4 for Acid Red 18 Decolorization

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Heterogeneous activation of peroxymonosulfate for bisphenol AF degradation with BiOI_0.5Cl_0.5

Heterogeneous activation of peroxymonosulfate for bisphenol AF degradation with BiOI_0.5Cl_0.5