Sunlight assisted degradation of a pollutant dye in water by a WO3@g-C3N4 nanocomposite catalyst

Borthakur, Sukanya; Basyach, Purashri; Kalita, Lisamoni; Sonowal, Karanika; Tiwari, Amritanjali; Chetia, Pubali; Saikia, Lakshi

doi:10.1039/c9nj05142b

Cited by 40 publications

(21 citation statements)

References 81 publications

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“…Figure 15e displays the PL emission peak of the bulk g-C 3 N 4 and 18.6 wt % WO 3 /g-C 3 N 4 hybrid composite [254]. The result demonstrates that the intensity of the composites' PL peak at ~440 nm is lower than that of the pure g-C 3 N 4 [255][256][257]. The PL spectra revealed that WO 3 apparently suppresses the photoinduced electron-hole recombination in the WO 3 /g-C 3 N 4 composites and confirms the Z-scheme interface contact [258].…”

Section: Cheng Et Al Also Demonstrated the Insignificant Deactivation...mentioning

confidence: 98%

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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Section: Cheng Et Al Also Demonstrated the Insignificant Deactivation...mentioning

confidence: 98%

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

2022

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“…Based on the above hypothesis, graphitic carbon nitride (g-C 3 N 4 ) might be a suitable compound for coupling with the ZnO/CuO composite because of its low cost and large-scale manufacturing, unique electronic and optical properties, good chemical and thermal stability, facile preparation, and non-toxicity [17,18]. In addition, the photocatalytic activity of g-C 3 N 4 -related composites has been extensively studied [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the photocatalytic activity of g-C 3 N 4 -related composites has been extensively studied [19][20][21][22][23]. However, the photocatalytic efficiency towards pollutant degradation of pristine g-C 3 N 4 is low due to its quick e − -h + pair recombination ability [18,24]. Therefore, to counteract this drawback, various methods have been applied in attempts to increase the visible light photocatalysis, particularly coupling with other semiconductors or metals, non-metal doping, control of morphology, etc.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient and Sustainable ZnO/CuO/g-C3N4 Photocatalyst for Wastewater Treatment under Visible Light through Heterojunction Development

et al. 2022

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Dye-containing pollutants are currently a threat to the environment, and it is highly challenging to eliminate these dyes photocatalytically under visible light. Herein, we designed and prepared a ZnO/CuO/g-C3N4 (ZCG) heterostructure nanocomposite by a co-crystallization procedure and applied it to eliminate pollutants from wastewater via a photocatalytic scheme. The structural and morphological features of the composite confirmed the formation of a ZCG nanocomposite. The photocatalytic capability of the ZCG photocatalyst was investigated via the decomposition of methylene blue dye. The outstanding activity level of 97.46% was reached within 50 min. In addition, the proficiency of the ZCG composite was 753%, 392%, 156%, and 130% higher than photolysis, g-C3N4, CuO, and ZnO, respectively. Furthermore, the photodeterioration activity on Congo red was also evaluated and found to be excellent. The enhanced catalytic achievement is attributed to the construction of heterojunctions among the constituent compounds. These properties boost the charge transfer and decrease the recombination rate. Moreover, the reusability of the ZCG product was explored and a negligible photoactivity decline was detected after six successful runs. The outcomes suggest the as-prepared nanocomposite can be applied to remove pollutants, which opens a new door to practical implementation.

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“…Conventional techniques like sedimentation, oxidation by chemical methods, ltration and coagulations have many drawbacks due to the formation of various byproducts, and the associated energy and cost intensive methods 2,3 . Hence, nanoparticles with high photocatalytic properties are being explored as a solution to eliminate harmful pollutants from water bodies.…”

Section: Introductionmentioning

confidence: 99%

Novel 3D-Flower Shaped KTaO3 Nanostructures: A Perovskite with Highly Efficient Photocatalytic and H2 Generation Ability

Praveen

Sumedha

Shashank

et al. 2022

Preprint

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Treatment of industrial wastewater is one of the biggest challenges that mankind is facing today to prevent environmental pollution and its associated adverse effects on human health. Environmentalists across the world have given a clarion call for dye degradation, wastewater treatment and their effective management in our surrounding habitats. Despite significant progress in the development of new water treatment technologies, new materials haven’t matured enough for large scale industrial applications. Hence, the development of new scalable and sustainable multifunctional materials having the potential to treat wastewater and generate energy is the need of the hour. In this direction, novel 3D-flower shaped KTaO3 (3D-F-KT) material has been synthesized using areca seed powder as a green fuel. This new material has been successfully applied for the treatment of industrial wastewater contaminated with Rose Bengal. The efficiency of the material was analysed using several parameters like catalytic loading, dye concentration, kinetic and scavenging experiments, photostability and recyclability. In addition, the material was subjected to optical studies and H2 generation, making it a highly versatile multifunctional material, exhibiting a degradation efficiency of 94% in a short span of 150 minutes and a photocatalytic H2 generation efficiency of 374 mmolg− 1 through water splitting. With an immense potential, KTaO3 presents itself as a multifunctional catalyst that can be scaled up for a variety of industrial applications ranging from wastewater treatment to energy generation and storage.

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Sunlight assisted degradation of a pollutant dye in water by a WO₃@g-C₃N₄ nanocomposite catalyst

Abstract: A series of WO3@g-C3N4 nanocomposites were prepared by following a facile, cost-effective chemical rote and characterized by different techniques. They are promising photocatalyst with high potential for solar light harvesting and environmental remediation.

Cited by 40 publications

References 81 publications

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

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

Highly Efficient and Sustainable ZnO/CuO/g-C3N4 Photocatalyst for Wastewater Treatment under Visible Light through Heterojunction Development

Novel 3D-Flower Shaped KTaO3 Nanostructures: A Perovskite with Highly Efficient Photocatalytic and H2 Generation Ability

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