rGO-TiO2-CdO-ZnO-Ag photocatalyst for enhancing photocatalytic degradation of methylene blue

Akyüz, Duygu

doi:10.1016/j.optmat.2021.111090

Cited by 44 publications

(10 citation statements)

References 50 publications

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“…The IPCE of the TiO 2 /rGO/Ag photoanode-based plasmonic DSSC device achieved a maximum value of ca. 77.82% at an incident wavelength of 550 nm due to improved photon harvesting efficiency and a higher number of electron extraction from the N719 dye molecule than the other devices [ 27 , 28 , 52 ]. The photovoltaic performance of the fabricated TiO 2 /rGO/Ag photoanode-based plasmonic DSSC cell has been compared with a recent report, as illustrated in Figure 4 c [ 54 , 55 , 56 , 57 , 58 , 59 ].…”

Section: Resultsmentioning

confidence: 99%

“…For example, Huan et al prepared a flower-shaped nanosheet rGO/TiO 2 composite material that exhibited a photocatalytic efficiency of 92.3% under UV–visible light irradiation for the degradation of a rhodamine B (RhB) solution [ 26 ]. Duygu et al reported the development of rGO-TiO 2 -CdO-ZnO-Ag based composites that exhibited an excellent degradation rate of methylene blue (MB) dye (15 min) with 91% photocatalytic efficiency under UV light irradiation [ 27 ]. Similarly, Zohreh et al reported the influence of surface plasmon resonance on the photovoltaic characteristics of Ag/TiO 2 in a photoanode-based DSSC device with a power conversion efficiency (PCE) of 6.5% under 1 sun simulated solar irradiation [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

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Plasmon Effect of Ag Nanoparticles on TiO2/rGO Nanostructures for Enhanced Energy Harvesting and Environmental Remediation

et al. 2022

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We report Ag nanoparticles infused with mesosphere TiO2/reduced graphene oxide (rGO) nanosheet (TiO2/rGO/Ag) hybrid nanostructures have been successfully fabricated using a series of solution process synthesis routes and an in-situ growth method. The prepared hybrid nanostructure is utilized for the fabrication of photovoltaic cells and the photocatalytic degradation of pollutants. The photovoltaic characteristics of a dye-sensitized solar cell (DSSC) device with plasmonic hybrid nanostructure (TiO2/rGO/Ag) photoanode achieved a highest short-circuit current density (JSC) of 16.05 mA/cm2, an open circuit voltage (VOC) of 0.74 V and a fill factor (FF) of 62.5%. The fabricated plasmonic DSSC device exhibited a maximum power conversion efficiency (PCE) of 7.27%, which is almost 1.7 times higher than the TiO2-based DSSC (4.10%). For the photocatalytic degradation of pollutants, the prepared TiO2/rGO/Ag photocatalyst exhibited superior photodegradation of methylene blue (MB) dye molecules at around 93% and the mineralization of total organic compounds (TOC) by 80% in aqueous solution after 160 min under continuous irradiation with natural sunlight. Moreover, the enhanced performance of the DSSC device and the MB dye degradation exhibited by the hybrid nanostructures are more associated with their high surface area. Therefore, the proposed plasmonic hybrid nanostructure system is a further development for photovoltaics and environmental remediation applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plasmon Effect of Ag Nanoparticles on TiO2/rGO Nanostructures for Enhanced Energy Harvesting and Environmental Remediation

et al. 2022

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“…We have also studied the reusability and regeneration process of the TMs-doped materials (Fe@ZrO 2 and Ni@ZrO 2 ) under identical conditions (pH = 11, time = 30 min, temperature = ambient, catalyst Fe-doped ZnS MB 100 [42] C-TiO 2 MB 98.7 [43] Fe-TiO 2 MB 93.1 [43] Nano ZnS MB 99.76 [44] rGO-TiO 2 -CdO-ZnO-Ag MB 91 [45] Mn-doped ZnAl 2 O 4 MG 57 [46] Al-Li/Th-LDH@CNT MG 98 [47] FeNPs/PMS MG 88 [48] La 1-y Gd y Ni Present study amount = 0.1 g and dye conc. = 100 mg/L) as shown in Figure 9.…”

Section: Reusability Of Catalystmentioning

confidence: 99%

Facile synthesis of zirconia supported nanomaterials for efficient photocatalytic applications

Khan

Saeed

Awad

et al. 2023

J Chinese Chemical Soc

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The recent study enlightens the synthesis and characterization of zirconia (ZrO 2 ), Fe-doped ZrO 2 (Fe@ZrO 2 ), and Ni-doped ZrO 2 (Ni@ZrO 2 ) catalysts having new-fangled morphology with tuned band gap as photocatalysts for degradation of textile wastewater dyes methylene blue (MB), malachite green (MG), and their mixtures. SEM imaging of Fe@ZrO 2 and Ni@ZrO 2 is interestingly varied from ZrO 2 as well as doping of transition metals greatly affects the morphology of composites. The optimization study depicts that the pH, time (min) and catalyst amount (g) have a direct relation with degradation efficiency, while the dye concentration (mg/L) has an indirect relation as well. The photocatalytic studies depict that the degradation of MB and MG follows oxidation pathway via hydroxyl radicals (OH • ) and holes. Reusability of catalysts corresponds to a little decrease in degradation efficiency in the first two cycles and decreases to about $10% (Ni@ZrO 2 ) and $12% (Fe@ZrO 2 ) in next three cycles.

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“…Figure 5 provides the mechanistic pathway of dye degradation pathway with titanium dioxide as photocatalyst. A multi-metal oxide including catalyst (titanium dioxide–cadmium oxide-zinc oxide) loaded on silver nanoparticles in the presence of reduced graphene oxide was synthesized, and its photocatalytic efficacy on methylene blue degradation (Akyüz 2021 ) was explored and found 91% degradation within 15 min under ultraviolet irradiation, mainly attributed to decrease in the wide band gap of titanium dioxide due to the presence of multi-transition oxides. Similar strategy was used to degrade azo dye reactive violet 5 dye by titanium dioxide nanoparticles (Chung and Chen 2009 ).…”

Section: Applications Of Titanium Dioxidementioning

confidence: 99%

Synthesis and application of titanium dioxide photocatalysis for energy, decontamination and viral disinfection: a review

Nachiappan²,

et al. 2022

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Global pollution is calling for advanced methods to remove contaminants from water and wastewater, such as TiO 2 -assisted photocatalysis. The environmental applications of titanium dioxide have started after the initial TiO 2 application for water splitting by Fujishima and Honda in 1972. TiO 2 is now used for self-cleaning surfaces, air and water purification systems, microbial inactivation and selective organic conversion. The synthesis of titanium dioxide nanomaterials with high photocatalytic activity is actually a major challenge. Here we review titanium dioxide photocatalysis with focus on mechanims, synthesis, and applications. Synthetic methods include sol-gel, sonochemical, microwave, oxidation, deposition, hydro/solvothermal, and biological techniques. Applications comprise the production of energy, petroleum recovery, and the removal of microplastics, pharmaceuticals, metals, dyes, pesticides, and of viruses such as the severe acute respiratory syndrome coronavirus 2.

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rGO-TiO2-CdO-ZnO-Ag photocatalyst for enhancing photocatalytic degradation of methylene blue

Cited by 44 publications

References 50 publications

Plasmon Effect of Ag Nanoparticles on TiO2/rGO Nanostructures for Enhanced Energy Harvesting and Environmental Remediation

Plasmon Effect of Ag Nanoparticles on TiO2/rGO Nanostructures for Enhanced Energy Harvesting and Environmental Remediation

Facile synthesis of zirconia supported nanomaterials for efficient photocatalytic applications

Synthesis and application of titanium dioxide photocatalysis for energy, decontamination and viral disinfection: a review

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