Graphitic carbon nitride nanosheets coupled with carbon dots and BiOI nanoparticles: Boosting visible-light-driven photocatalytic activity

Asadzadeh‐Khaneghah, Soheila; Habibi‐Yangjeh, Aziz; Seifzadeh, D.

doi:10.1016/j.jtice.2018.03.017

Cited by 118 publications

(13 citation statements)

References 62 publications

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“…3b. Since the intensity of absorption spectra gradually decreased with irradiation time and the position of major peaks did not shift horizontally, it could be inferred that the PC degradation process of RhB followed the aromatic ringopening mechanism [37].…”

Section: Performance Of Dye Degradation By Different Processesmentioning

confidence: 99%

Portable wastewater treatment system based on synergistic photocatalytic and persulphate degradation under visible light

Zhang

Liu

et al. 2021

Sci. China Mater.

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Highly efficient, low-cost, and portable wastewater treatment and purification solutions are urgently needed for aqueous pollution removal, especially at remote sites. Synergistic photocatalytic (PC) and persulphate (PS) degradation under visible light offers an exceptional alternative for this purpose. In this work, we coupled a TiO 2-based PC system with a PS oxidation system into a portable advanced oxidation device for rapid and deep degradation of organic contaminants in wastewater. Using hydrogenation, we fabricated hydrogenated anatase branched-rutile TiO 2 nanorod (H-AB@RTNR) photocatalysts which enable the PC degradation to occur under visible light and improve the utilization of solar energy. We also discovered that the addition of PS resulted in the synergistic degradation of tenacious and persistent organics, dramatically improving the extent and kinetics of the degradation. A degradation rate of 100% and a reaction rate constant of 0.0221 min −1 for degrading 1 L rhodamine B (20 mg L −1) were achieved in 120 min in a specially designed thin-layer cell under visible light irradiation. The superior performance of the synergistic PC and PS degradation system was also demonstrated in the degradation of real industrial wastewater. Both remarkable performances can be attributed to the heterophase junction and oxygen vacancies in the photocatalyst that facilitate the catalytic conversion of PS anions into highly active radicals (•SO 4 − and •OH). This work suggests that the as-proposed synergistic degradation design is a promising solution for building a portable wastewater treatment system.

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Section: Performance Of Dye Degradation By Different Processesmentioning

confidence: 99%

Portable wastewater treatment system based on synergistic photocatalytic and persulphate degradation under visible light

Zhang

Liu

et al. 2021

Sci. China Mater.

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“…[35,137,138] Besides, 2D layered BiOX (X = Cl, I, Br) also attracts lots of attentions ascribed to the inherently indirect transition bandgap, which is firmly against the recombination of charge carriers and help to get highperformance g-C 3 N 4 /CD-based photocatalyst. [36,37,139,140] In detail, the Ag 3 PO 4 and CDs were anchored on the surface of 2D g-C 3 N 4 (Figure 8i) by Miao et al via a facile two-step solution method. [32] The matched energy level forms the Z-scheme type photocatalyst between Ag 3 PO 4 and g-C 3 N 4 , which was confirmed by the generation of •O 2 − radicals.…”

Section: Ternarymentioning

confidence: 99%

Efficient Combination of G‐C₃N₄ and CDs for Enhanced Photocatalytic Performance: A Review of Synthesis, Strategies, and Applications

Shi

Yang

et al. 2021

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Recently, heterogeneous photocatalysts have achieved much interest on account of their great potential applications in resolving many tough energy and environmental troubles around the world through an ecologically sustainable way. Heterogeneous nanocomposites composed of graphitic carbon nitride (g-C 3 N 4 ) and carbon dots (CDs) possess broad spectrum absorption, appropriate electronic band structures, rapid carrier mobility, abundant reserves, excellent chemical stability, and facile synthesis methods, which make them promising composite photocatalysts for suitable applications such as photocatalytic solar fuels production and contaminant decomposition. With the rapid development in photocatalysis by hybridization of g-C 3 N 4 and CDs, a systematic summary and prospection of performance improvement are urgent and meaningful. This review first focuses on various kinds of effectively synthetic methods of composites. Following, the strategies available for enhanced performance, including morphology optimization, spectral absorption improvement, ternary or quaternary composition hybrid, lateral or vertical heterostructures construction, heteroatom doping, and so forth, are fully discussed. Then, the applications mainly in efficient photocatalytic hydrogen generation, photocatalytic carbon dioxide reduction, and organic pollutants degradation are systematically demonstrated. Finally, the remaining issues and prospect of further development are proposed as some kind of guidance for powerful combination of g-C 3 N 4 and CDs with high efficiency to photocatalysis.

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“…Using an external UV source and/or a post-treatment step may significantly impede the cost effectiveness of the SODIS process [140]. Numerous studies aimed to overcome these issues in the past few years, aiming to develop an effective visible light photocatalyst able to ensure that the photocatalysis process worked under normal conditions of SODIS without the need for any external light sources [141,142]. The efficacy and mechanisms of SODIS against E. coli have been extensively studied since the 1980s; other types of pathogens are yet to be studied.…”

Section: Limitations and Challenges Of Sodismentioning

confidence: 99%

Insights into Solar Disinfection Enhancements for Drinking Water Treatment Applications

et al. 2021

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Poor access to drinking water, sanitation, and hygiene has always been a major concern and a main challenge facing humanity even in the current century. A third of the global population lacks access to microbiologically safe drinking water, especially in rural and poor areas that lack proper treatment facilities. Solar water disinfection (SODIS) is widely proven by the World Health Organization as an accepted method for inactivating waterborne pathogens. A significant number of studies have recently been conducted regarding its effectiveness and how to overcome its limitations, by using water pretreatment steps either by physical, chemical, and biological factors or the integration of photocatalysis in SODIS processes. This review covers the role of solar disinfection in water treatment applications, going through different water treatment approaches including physical, chemical, and biological, and discusses the inactivation mechanisms of water pathogens including bacteria, viruses, and even protozoa and fungi. The review also addresses the latest advances in different pre-treatment modifications to enhance the treatment performance of the SODIS process in addition to the main limitations and challenges.

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Graphitic carbon nitride nanosheets coupled with carbon dots and BiOI nanoparticles: Boosting visible-light-driven photocatalytic activity

Cited by 118 publications

References 62 publications

Portable wastewater treatment system based on synergistic photocatalytic and persulphate degradation under visible light

Portable wastewater treatment system based on synergistic photocatalytic and persulphate degradation under visible light

Efficient Combination of G‐C₃N₄ and CDs for Enhanced Photocatalytic Performance: A Review of Synthesis, Strategies, and Applications

Insights into Solar Disinfection Enhancements for Drinking Water Treatment Applications

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Graphitic carbon nitride nanosheets coupled with carbon dots and BiOI nanoparticles: Boosting visible-light-driven photocatalytic activity

Cited by 118 publications

References 62 publications

Portable wastewater treatment system based on synergistic photocatalytic and persulphate degradation under visible light

Portable wastewater treatment system based on synergistic photocatalytic and persulphate degradation under visible light

Efficient Combination of G‐C3N4 and CDs for Enhanced Photocatalytic Performance: A Review of Synthesis, Strategies, and Applications

Insights into Solar Disinfection Enhancements for Drinking Water Treatment Applications

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Efficient Combination of G‐C₃N₄ and CDs for Enhanced Photocatalytic Performance: A Review of Synthesis, Strategies, and Applications