Enhanced catalytic ozonation performance of highly stabilized mesoporous ZnO doped g-C 3 N 4  composite for efficient water decontamination

Yuan, Xiangjuan; Duan, Shule; Wu, Guangyu; Sun, Lei; Cao, Gang; Li, Dongya; Xu, Haiming; Li, Qiang; Xia, Dongsheng

doi:10.1016/j.apcata.2017.12.011

Cited by 76 publications

(22 citation statements)

References 48 publications

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Section: Introductionmentioning

confidence: 99%

“…Coupling g-C 3 N 4 with ZnO to form heterostructured nanocomposites presents a novel and feasible route to enhance light sensitivity and charge carrier separation [ 26 ]. The improved adsorption of visible light and photocatalytic activity of g-C 3 N 4 /ZnO nanocomposites could be attributed to the establishment of a heterojunction between g-C 3 N 4 and ZnO [ 26 ]. In their pioneering studies, Wang et al [ 27 ] and Liu et al [ 28 ] independently synthesized g-C 3 N 4 and ZnO heterostructured composites through a two-step chemisorption method [ 27 ] and a ball milling method [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

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In-Situ Fabrication of g-C3N4/ZnO Nanocomposites for Photocatalytic Degradation of Methylene Blue: Synthesis Procedure Does Matter

Zhang

Ren

et al. 2019

Nanomaterials

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The nanocomposite preparation procedure plays an important role in achieving a well-established heterostructured junction, and hence, an optimized photocatalytic activity. In this study, a series of g-C3N4/ZnO nanocomposites were prepared through two distinct procedures of a low-cost, environmentally-friendly, in-situ fabrication process, with urea and zinc acetate being the only precursor materials. The physicochemical properties of synthesized g-C3N4/ZnO composites were mainly characterized by XRD, UV–VIS diffuse reflectance spectroscopy (DRS), N2 adsorption-desorption, FTIR, TEM, and SEM. These nanocomposites’ photocatalytic properties were evaluated in methylene blue (MB) dye photodecomposition under UV and sunlight irradiation. Interestingly, compared with ZnO nanorods, g-C3N4/ZnO nanocomposites (x:1, obtained from urea and ZnO nanorods) exhibited weak photocatalytic activity likely due to a “shading effect”, while nanocomposites (x:1 CN, made from g-C3N4 and zinc acetate) showed enhanced photocatalytic activity that can be ascribed to the effective establishment of heterojunctions. A kinetics study showed that a maximum reaction rate constant of 0.1862 min-1 can be achieved under solar light illumination, which is three times higher than that of bare ZnO nanorods. The photocatalytic mechanism was revealed by determining reactive species through adding a series of scavengers. It suggested that reactive ∙O2− and h+ radicals played a major role in promoting dye photodegradation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In-Situ Fabrication of g-C3N4/ZnO Nanocomposites for Photocatalytic Degradation of Methylene Blue: Synthesis Procedure Does Matter

Zhang

Ren

et al. 2019

Nanomaterials

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“…However, these values are slightly more than the bare WO 3, and it is attributed to the interaction with the g-C 3 N 4 material. [27][28][29] From all the characterization techniques it is clear that the WO 3 and CeO 2 successfully deposited on the g-C 3 N 4 and these materials exhibited the high surface area and suitable band gap than the g-C 3 N 4 , which is important for photocatalytic applications.…”

Section: Resultsmentioning

confidence: 99%

Construction of metal oxide decorated $$\hbox {g-C}_{{3}}\hbox {N}_{{4}}$$ g-C 3 N 4 materials with enhanced photocatalytic

et al. 2019

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Herein we report the synthesis and photocatalytic evaluation of heterostructure WO 3 /g-C 3 N 4 (WMCN) and CeO 2 /g-C 3 N 4 (CMCN) materials for RhB degradation and photoelectrochemical studies. These materials were synthesized by varying the dosages of WO 3 and CeO 2 on g-C 3 N 4 individually and were characterized with state-of-the-art techniques like XRD, BET surface area, FT-IR, UV-Vis DRS, TGA, SEM, TEM and XPS. A collection of combined structural and morphological studies manifested the formation of bare g-C 3 N 4 , WO 3 , CeO 2 , WO 3 /g-C 3 N 4 and CeO 2 /g-C 3 N 4 materials. From the degradation results, we found that the material with 10 wt% WO 3 and 15 wt% CeO 2 content on g-C 3 N 4 showed the highest visible light activity. The first order rate constant for the photodegradation performance of WMCN10 and CMCN15 is found to be 5.5 and 2.5 times, respectively, greater than that of g-C 3 N 4. Photoelectrochemical studies were also carried out on the above materials. Interestingly, the photocurrent density of WMCN10 photoanode achieved 1.45 mA cm −2 at 1.23 V (vs.) RHE and this is much larger than all the prepared materials. This enhanced photoactivity of WMCN10 is mainly due to the cooperative synergy of WO 3 with g-C 3 N 4 , which enhanced the visible light absorption and suppresses the electron-hole recombination.

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“…[101] Humic acid (HA), as the main component of natural organic matter (NOM), can react with ozone and reduce the catalytic ozonation performance. [102] In recent years, Photocatalytic SR-AOPs have received growing attention because of its efficiency and economy. SO 4 * À is a stronger oxidant (2.5 eV-3.1 eV) with a longer half-life (30-40 μs), compared with * OH.…”

Section: Coupled Photocatalysis Aopsmentioning

confidence: 99%

“…In addition, if a high concentration of bromide ions exists in sewage, the carcinogen bromate will be produced . Humic acid (HA), as the main component of natural organic matter (NOM), can react with ozone and reduce the catalytic ozonation performance . In recent years, Photocatalytic SR‐AOPs have received growing attention because of its efficiency and economy.…”

Section: Reaction Process Of Photocatalysis Aopsmentioning

confidence: 99%

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

Liu

Wang

2020

Chemistry An Asian Journal

192

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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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Enhanced catalytic ozonation performance of highly stabilized mesoporous ZnO doped g-C 3 N 4 composite for efficient water decontamination

Cited by 76 publications

References 48 publications

In-Situ Fabrication of g-C3N4/ZnO Nanocomposites for Photocatalytic Degradation of Methylene Blue: Synthesis Procedure Does Matter

In-Situ Fabrication of g-C3N4/ZnO Nanocomposites for Photocatalytic Degradation of Methylene Blue: Synthesis Procedure Does Matter

Construction of metal oxide decorated $$\hbox {g-C}_{{3}}\hbox {N}_{{4}}$$ g-C 3 N 4 materials with enhanced photocatalytic

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

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