Solvothermal synthesis of activated carbon loaded CdS nanoflowers: Boosted photodegradation of dye by adsorption and photocatalysis synergy

Bhavsar, Khushboo; Labhane, Prakash K.; Dhake, Rajesh; Sonawane, Gunvant H.

doi:10.1016/j.cplett.2020.137202

Cited by 66 publications

(21 citation statements)

References 51 publications

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“…The diffraction peaks of AC/TiO 2 and 2‐AC/TiO 2 /WO 3 are similar, appearing at 2θ=25.6 °, 37.7 °, 47.9 °, 54.2 °, 55.1 °, 62.5 °. These crystal plane diffraction peaks all correspond to the standard anatase phase TiO 2 (101), (004), (200), (105), (211), (204) crystal planes, [37] as shown in Figure S1. These results indicate that the synthesis of WO 3 has no effect on the original crystal structure of TiO 2 .…”

Section: Resultsmentioning

confidence: 78%

An Efficient, Multi‐element AC/TiO₂/WO₃ Photocatalyst for the Degradation of Tetracycline Hydrochloride

Nan

Yang

et al. 2022

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In this study, a simple one‐step hydrothermal synthesis of three‐element complex system photocatalyst technology is systematically studied. The results show that due to the complex heterojunction formed by titanium dioxide (TiO2), tungsten trioxide (WO3) and activated carbon (AC) and the strong adsorption performance of AC, the catalytic efficiency and cycle stability of the composite have been significantly improved. The excellent electron transport ability of AC is conducive to the separation of carriers, so that the electron transfer between AC/TiO2 and AC/WO3 can make it achieve a heterojunction effect similar to TiO2/WO3. The rich specific surface area of AC and the pores of the “labyrinth” structure can provide a higher concentration of degradable substances inside the catalyst, and the degraded substances are quickly transferred to the active site for degradation. Therefore, by controlling the mass ratio of AC/TiO2/WO3, a photocatalyst with high catalytic efficiency and strong cycle stability was successfully prepared (the degradation efficiency is above 95 %, and the degradation efficiency after 5 cycles is above 80 %).

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Section: Resultsmentioning

confidence: 78%

An Efficient, Multi‐element AC/TiO₂/WO₃ Photocatalyst for the Degradation of Tetracycline Hydrochloride

Nan

Yang

et al. 2022

ChemistrySelect

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“…Depending on the obtained results, as illustrated in Table 1, it was noticed that there are differences between the two kinetic models and their correlation coefficient (R 2 ) values in the dark and in light irradiation. In dark mode, the rate constants K 2 value of the pseudo-second-order model is high for SA/PVP/WO 3 rod-like, which indicates the chemisorption nature for the adsorption process of MB [44]. Under light irradiation, the R 2 value of the pseudo-first and second-orders model are the same for the rod-like WO 3 , which may be due to the high chemical stability of the prepared catalyst under light irradiation conditions.…”

Section: Kinetic Modelsmentioning

confidence: 96%

Effect of the Morphology of Tungsten Oxide Embedded in Sodium Alginate/Polyvinylpyrrolidone Composite Beads on the Photocatalytic Degradation of Methylene Blue Dye Solution

et al. 2020

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Tungsten oxide nanostructures were modified by oxygen vacancies through hydrothermal treatment. Both the crystalline structure and morphological appearance were completely changed. Spherical WO3·H2O was prepared from tungstic acid solution by aging at room temperature, while rod-like WO3·0.33H2O was prepared by hydrothermal treatment of tungstic acid solution at 120 °C. These structures embedded in sodium alginate (SA)/polyvinylpyrrolidone (PVP) were synthesized as novel porous beads by gelation method into calcium chloride solution. The performance of the prepared materials as photocatalysts is examined for methylene blue (MB) degradation in aqueous solutions. Different operation parameters affecting the dye degradation process, such as light intensity, illumination time, and photocatalyst dosage are investigated. Results revealed that the photocatalytic activity of novel nanocomposite changed with the change in WO3 morphology. Namely, the beads with rod nanostructure of WO3 have shown better effectiveness in MB removal than the beads containing WO3 in spherical form. The maximum degradation efficiency was found to be 98% for WO3 nanorods structure embedded beads, while the maximum removal of WO3 nanospheres structure embedded beads was 91%. The cycling-ability and reuse results recommend both prepared structures to be used as effective tools for treating MB dye-contaminated wastewaters. The results show that the novel SA/PVP/WO3 nanocomposite beads are eco-friendly nanocomposite materials that can be applied as photocatalysts for the degradation of cationic dyes in contaminated water.

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“…Table 2 shows that there are clear differences between the two models in the dark and under irradiation of visible light. In the pseudo-second order model, the rate constant K 2 for SA/PVP/TiO 2 -3 in dark mode is the highest, indicating the chemisorption nature of the MB adsorption process [35]. The MB degradation mechanism begins with the adsorption of the dye on the surface of the nanocomposite by electrostatic interactions [36], followed by its photodegradation.…”

Section: Kinetic Modelsmentioning

confidence: 97%

Novel Sodium Alginate/Polyvinylpyrrolidone/TiO2 Nanocomposite for Efficient Removal of Cationic Dye from Aqueous Solution

et al. 2021

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The combination of adsorption and photodegradation processes is an effective technique for the removal of dye contaminants from water, which is motivating the development of novel adsorbent-photocatalyst materials for wastewater treatment. Herein, novel nanocomposite porous beads were developed using titanium dioxide (TiO2) nanotubes embedded in a sodium alginate (SA)/polyvinylpyrrolidone (PVP) matrix using calcium chloride solution as a crosslinker. The prepared nanocomposite beads’ performance was examined as an adsorbent-photocatalyst for the breakdown of methylene blue in aqueous solutions. Several operation factors influencing the dye decomposition process, including photocatalyst dosage, illumination time, light intensity, and stability were investigated. The findings demonstrated that the removal activity of the beads changed with the TiO2 weight ratio in the composite. It was found that SA/PVP/TiO2-3 nanocomposite beads presented the greatest deterioration efficiency for methylene blue dye (98.9%). The cycling ability and reusability of the prepared SA/PVP/TiO2 nanocomposite beads recommend their use as efficient, eco-friendly materials for the treatment of wastewaters contaminated with cationic dyes.

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Solvothermal synthesis of activated carbon loaded CdS nanoflowers: Boosted photodegradation of dye by adsorption and photocatalysis synergy

Cited by 66 publications

References 51 publications

An Efficient, Multi‐element AC/TiO₂/WO₃ Photocatalyst for the Degradation of Tetracycline Hydrochloride

An Efficient, Multi‐element AC/TiO₂/WO₃ Photocatalyst for the Degradation of Tetracycline Hydrochloride

Effect of the Morphology of Tungsten Oxide Embedded in Sodium Alginate/Polyvinylpyrrolidone Composite Beads on the Photocatalytic Degradation of Methylene Blue Dye Solution

Novel Sodium Alginate/Polyvinylpyrrolidone/TiO2 Nanocomposite for Efficient Removal of Cationic Dye from Aqueous Solution

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Solvothermal synthesis of activated carbon loaded CdS nanoflowers: Boosted photodegradation of dye by adsorption and photocatalysis synergy

Cited by 66 publications

References 51 publications

An Efficient, Multi‐element AC/TiO2/WO3 Photocatalyst for the Degradation of Tetracycline Hydrochloride

An Efficient, Multi‐element AC/TiO2/WO3 Photocatalyst for the Degradation of Tetracycline Hydrochloride

Effect of the Morphology of Tungsten Oxide Embedded in Sodium Alginate/Polyvinylpyrrolidone Composite Beads on the Photocatalytic Degradation of Methylene Blue Dye Solution

Novel Sodium Alginate/Polyvinylpyrrolidone/TiO2 Nanocomposite for Efficient Removal of Cationic Dye from Aqueous Solution

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An Efficient, Multi‐element AC/TiO₂/WO₃ Photocatalyst for the Degradation of Tetracycline Hydrochloride

An Efficient, Multi‐element AC/TiO₂/WO₃ Photocatalyst for the Degradation of Tetracycline Hydrochloride