A synergistic heterostructured ZnO/BaTiO3 loaded carbon photoanode in photocatalytic fuel cell for degradation of Reactive Red 120 and electricity generation

Ong, Yong-Por; Ho, Li-Ngee; Ong, Soon‐An; Banjuraizah, Johar; Ibrahim, Abdul Haqi; Lee, Sin-Li; Nordin, Norshahrizan

doi:10.1016/j.chemosphere.2018.12.004

Cited by 56 publications

(8 citation statements)

References 64 publications

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“…When ZnO is illuminated by light that photon energy equal or exceeds its band gap energy ( hv ≥ E g = 3.37 eV), the positive holes (h + VB ) are produced in the valence band when the electrons (e − CB ) from the valence band transfer to the conduction band across the band gap (Eq. 3 ) (Ong et al 2019 ). h + VB and e − CB are captured by the zinc vacancy near the valence band and the oxygen vacancy near the conduction band, respectively.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Degradation of Sugarcane Vinasse Using ZnO Photocatalyst: Operating Parameters, Kinetic Studies, Phytotoxicity Assessments, and Reusability

et al. 2021

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Photocatalytic degradation performance is highly related to optimized operating parameters such as initial concentration, pH value, and catalyst dosage. In this study, the impact of various parameters on the photocatalytic degradation of anaerobically digested vinasse (AnVE) has been determined through decolourization and chemical oxygen demand (COD) reduction efficiency using zinc oxide (ZnO) photocatalyst. In this context, the application of photocatalytic degradation in treating sugarcane vinasse using ZnO is yet to be explored. The COD reduction efficiency and decolourization achieved 83.40% and 99.29%, respectively, under the conditions of 250 mg/L initial COD concentration, pH 10, and 2.0 g/L catalyst dosage. The phytotoxicity assessment was also conducted to determine the toxicity of AnVE before and after treatment using mung bean ( Vigna radiata ). The reduction of root length and the weight of mung bean indicated that the sugarcane vinasse contains enormous amounts of organic substances that affect the plant's growth. The toxicity reduction in the AnVE solution can be proved by UV–Vis absorption spectra. Furthermore, the catalyst recovery achieved 93% in the reusability test. However, the COD reduction efficiency and decolourization were reduced every cycle. It was due to the depletion of the active sites in the catalyst with the adsorption of organic molecules. Thus, it can be concluded that the photocatalytic degradation in the treatment of AnVE was effective in organic degradation, decolorization, toxicity reduction and can be reused after the recovery process. Graphical abstract

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Section: Resultsmentioning

confidence: 99%

Photocatalytic Degradation of Sugarcane Vinasse Using ZnO Photocatalyst: Operating Parameters, Kinetic Studies, Phytotoxicity Assessments, and Reusability

et al. 2021

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“…[83] Besides, a large amount of ZnO-based composite semiconductors, which are modified by the narrow energy bandgap semiconductor with a long lifetime, were reported for facilitating the photoexcited charge separation, such as ZnO/Bi2O3, [84] ZnO/BiOI, [85] ZnO/g-C3N4, [86] ZnO/Ag2O [87] and ZnO/BaTiO3. [88] There are reports on research for extending the potential applications of ZnO photocatalysts. Graphene oxide (GO)-based ZnO photoanode has been employed to improve the photocatalytic degradation rate of the PFC.…”

Section: Photoanodementioning

confidence: 99%

“…[90] Recently, the double-sided ZnO/BaTiO3 heterojunction carbon plate-based photoanode has been studied for the first time to achieve enhanced performance by light activation on both sides of the photoanode. [88] Some of the solutions are costly and complicated. Therefore, finding a narrower bandgap semiconductor that can be directly activated by visible light is necessary.…”

Section: Photoanodementioning

confidence: 99%

Photocatalytic fuel cell – A review

Chen

Leung

et al. 2022

Chemical Engineering Journal

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“…In SCSP design, the use of expensive noble-metal dark cathode is a significant disadvantage. Pt is widely used as a dark cathode because of its superior activity along with its nontoxic and non-corrosive nature (Zeng et al, 2018b;Li N. et al, 2019;Ong et al, 2019;Tang et al, 2019). SCDP design comprises Frontiers in Chemistry frontiersin.org a photoanode and photocathode in a single chamber containing electrolyte and substrate (Figure 1).…”

Section: Single Chamber Dual Photo-electrodementioning

confidence: 99%

“…ZnO, which has a similar bandgap and similar bandedge positions as TiO 2, has been an attractive material for photoanode fabrication with its remarkable photoactivity. However, the vulnerable nature towards oxidation limits its application ( Lee et al, 2016b , 2017 ; Khalik et al, 2016 ; Kee et al, 2018 ; Lam et al, 2019 ; Ong et al, 2019 ). As a medium bandgap semiconductor, many have worked on BiVO 4 , which has been utilized as a visible light active photoanode.…”

Section: Advancements In Materialsmentioning

confidence: 99%

Synergy of photocatalysis and fuel cells: A chronological review on efficient designs, potential materials and emerging applications

et al. 2022

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The rising demand of energy and lack of clean water are two major concerns of modern world. Renewable energy sources are the only way out in order to provide energy in a sustainable manner for the ever-increasing demands of the society. A renewable energy source which can also provide clean water will be of immense interest and that is where Photocatalytic Fuel Cells (PFCs) exactly fit in. PFCs hold the ability to produce electric power with simultaneous photocatalytic degradation of pollutants on exposure to light. Different strategies, including conventional Photoelectrochemical cell design, have been technically upgraded to exploit the advantage of PFCs and to widen their applicability. Parallel to the research on design, researchers have put an immense effort into developing materials/composites for electrodes and their unique properties. The efficient strategies and potential materials have opened up a new horizon of applications for PFCs. Recent research reports reveal this persistently broadening arena which includes hydrogen and hydrogen peroxide generation, carbon dioxide and heavy metal reduction and even sensor applications. The review reported here consolidates all the aspects of various design strategies, materials and applications of PFCs. The review provides an overall understanding of PFC systems, which possess the potential to be a marvellous renewable source of energy with a handful of simultaneous applications. The review is a read to the scientific community and early researchers interested in working on PFC systems.

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A synergistic heterostructured ZnO/BaTiO3 loaded carbon photoanode in photocatalytic fuel cell for degradation of Reactive Red 120 and electricity generation

Cited by 56 publications

References 64 publications

Photocatalytic Degradation of Sugarcane Vinasse Using ZnO Photocatalyst: Operating Parameters, Kinetic Studies, Phytotoxicity Assessments, and Reusability

Photocatalytic Degradation of Sugarcane Vinasse Using ZnO Photocatalyst: Operating Parameters, Kinetic Studies, Phytotoxicity Assessments, and Reusability

Photocatalytic fuel cell – A review

Synergy of photocatalysis and fuel cells: A chronological review on efficient designs, potential materials and emerging applications

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