Synthesizing Co3O4-BiVO4/g-C3N4 heterojunction composites for superior photocatalytic redox activity

Wang, Yile; Yu, Dan; Wang, Wei; Gao, Pin; Zhong, Shan; Zhang, Lishan; Zhao, Qiangqiang; Liu, Baojiang

doi:10.1016/j.seppur.2020.116562

Cited by 110 publications

(25 citation statements)

References 69 publications

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“…Hence the quantification of the degradation percentage can be done by measuring this peak. It is reported that the hydroxyl ions are identified with good effect over the organic contaminants 55 . Previous reports says that the discoloration is happening due to the formation of 1-naphthalenol and dibutyl phythalate as bye products during the dye degradation.…”

Section: Resultsmentioning

confidence: 99%

Electronic and optical competence of TiO2/BiVO4 nanocomposites in the photocatalytic processes

Drisya

Solís-López

Ríos-Ramírez

et al. 2020

Sci Rep

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Nanocomposites with different ratios of titanium dioxide and bismuth vanadate [TiO 2 ]/[BiVO 4 ] give rise to compatible electronic band structure alignment at their interfaces to ensure enhanced photoactivated charge transfer under visible light. The sol-gel method and suitable post-synthesis thermal treatments were used to synthesize different compositions with stabilized anatase phase of tio 2 and monoclinic scheelite polymorph BiVo 4. Structural, electronic and optical characterizations were performed and the results were analysed as a function of the stoichiometry, in which both crystalline structures show a clear junction formation among their characteristic stacking planes. Photocatalytic and (photo) electrochemical responses of the nanocomposites were investigated and tested for the degradation of azo dyes (Acid Blue-113, AB-113) (~ 99%) under visible light radiation. The nanocomposite with a mass ratio of (1:10) shows the highest photocatalytic efficiency compared to the other compositions. HRTEM images showed marked regions in which both crystalline structures form a clear junction and their characteristic planes. However, the increase of BiVO 4 content in the network overcomes the photocatalytic activity due to the decrease in the reduction potential of the photo-generated electrons with high recombination rates. Due to rapid increase in population and the world's rapid industrialization, natural water bodies are being heavily contaminated with industrial wastes 1,2,3. Pollutants present in the industrial effluents are classified as toxins, carcinogens, mutagens, teratogens, and endocrine-disrupting agents 4. Particularly, the presence of dyes in industrial effluents leads to a decreased penetration of sunlight and a reduction of the photosynthetic activities in aquatic ecosystems, as well as an increase in the biochemical oxygen demand 5. The dyes are specified as dispersive dyes (polyester, nylon and acetate) 6 , reactive dyes (Safira dye, HEXL) 7 , sulphur dyes, and vat dyes (viscous) 8. The Azo dyes are colorants that fall under all of the above-mentioned categories. They contain one or more-N=N-groups in their chemical structure, which consists of highly substituted aromatic rings 9. To ensure water purification, several known methods are well-established: desalination, distillation, filtration, flocculation, reverse osmosis, and sedimentation 10,11 , etc. However, the chemical structure of azo dyes leads to recalcitrant characteristics, i.e., they degrade slowly under natural conditions, and they are also resistant to conventional wastewater treatment processes 6. For this reason, Advanced Oxidation Processes (AOPs), have received a widespread attention in recent years, since they are a very convenient water treatment method that eliminates these types of contaminants 5,7. Among AOPs, photocatalysis is considered as a green alternative to attain an efficient purification of polluted water 12,13. Furthermore, the implementation of photoactive nanomaterials in water treatment show outstanding resul...

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Section: Resultsmentioning

confidence: 99%

Electronic and optical competence of TiO2/BiVO4 nanocomposites in the photocatalytic processes

Drisya

Solís-López

Ríos-Ramírez

et al. 2020

Sci Rep

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“…It should be noted that the existing H 2 O 2 as interfering substrate could have a positive error effected on COD analysis 27 . It is important to be noted that the prove of present hydroxyradical is improtant as presented by several works 2,5,7,12,14,20,23,28 . In addition to the valuation of photocatalytic activity, the active species generated during the MB photocatalytic degradation were investigated by using scavenger as shown in Fig.…”

Section: Resultsmentioning

confidence: 94%

“…Among visible light driven photocatalyst, bismuth (Bi)-based photocatalysts have been attracting much attentions [10][11][12] , in which bismuth vanadate (BiVO 4 ) has emerged as an effective photocatalyst due to its excellent properties including inexpensiveness, resistance to corrosion, high physicochemical stability and dispersibility 13,14 . Unfortunately, the photocatalytic activity of BiVO 4 is restricted by the weak absorption and the poor migration of charged carriers 15,16 .…”

mentioning

confidence: 99%

New insight into the photocatalytic degradation of organic pollutant over BiVO4/SiO2/GO nanocomposite

Trinh

Channei

Nakaruk

et al. 2021

Sci Rep

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The nanocomposite of BiVO4-based material has been synthesized by one-step solvent method. The morphological, physical, chemical properties of the nanocomposite have been investigated. The results revealed that the surface area of BiVO4, BiVO4/SiO2 and BiVO4/SiO2/GO was 11.13, 28.47 and 43.93 m2/g, respectively. The structural test by XRD proved that the nanocomposites were monoclinic phase of bismuth vanadate. Adsorption and photocatalytic degradation were two main mechanisms that strongly related to pollutant removal efficiency (i.e., methylene blue and phenol). The BiVO4/SiO2/GO nanocomposite obtained the greatest MB removal efficiency due to its high adsorption ability from high surface area, whereas the photocatalytic degradation was insignificant mechanism. In contrast, the relatively low adsorption ability of BiVO4/SiO2/GO nanocomposite was observed when the pollutant was phenol due to negative charge and high stability of phenoxide ions, then the photocatalytic degradation became the main mechanism for phenol removal. The phenol removal efficiency reached approximately 70% in 6 h with H2O2 assistance. The combination of SiO2 and GO improved the surface property of BiVO4-based photocatalyst, however the excessive combination ratio generated the excellent adsorbent material rather than the photocatalyst. Hence, the optimal combination ratio is essential to archive the greatest nanocomposite for photocatalytic application.

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“…Like other heterojunctions, doping is another element to improve the performance of these composites and widen their applications [372][373][374][375][376]. Some g-C 3 N 4 -based ternary composites comprising the metal oxide compounds can promote photocatalytic activities [103,[377][378][379][380]. Bismuth complex oxides are among the most efficient catalysts with layered structures beside the g-C 3 N 4 -based composites.…”

Section: Other Metal Oxidesmentioning

confidence: 99%

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

2022

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g-C3N4 has drawn lots of attention due to its photocatalytic activity, low-cost and facile synthesis, and interesting layered structure. However, to improve some of the properties of g-C3N4, such as photochemical stability, electrical band structure, and to decrease charge recombination rate, and towards effective light-harvesting, g-C3N4–metal oxide-based heterojunctions have been introduced. In this review, we initially discussed the preparation, modification, and physical properties of the g-C3N4 and then, we discussed the combination of g-C3N4 with various metal oxides such as TiO2, ZnO, FeO, Fe2O3, Fe3O4, WO3, SnO, SnO2, etc. We summarized some of their characteristic properties of these heterojunctions, their optical features, photocatalytic performance, and electrical band edge positions. This review covers recent advances, including applications in water splitting, CO2 reduction, and photodegradation of organic pollutants, sensors, bacterial disinfection, and supercapacitors. We show that metal oxides can improve the efficiency of the bare g-C3N4 to make the composites suitable for a wide range of applications. Finally, this review provides some perspectives, limitations, and challenges in investigation of g-C3N4–metal-oxide-based heterojunctions.

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Synthesizing Co3O4-BiVO4/g-C3N4 heterojunction composites for superior photocatalytic redox activity

Cited by 110 publications

References 69 publications

Electronic and optical competence of TiO2/BiVO4 nanocomposites in the photocatalytic processes

Electronic and optical competence of TiO2/BiVO4 nanocomposites in the photocatalytic processes

New insight into the photocatalytic degradation of organic pollutant over BiVO4/SiO2/GO nanocomposite

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

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