Fabrication of floating CdS/EP photocatalyst by facile liquid phase deposition for highly efficient degradation of Rhodamine B (RhB) under visible light irradiation

Khan, Usman Ali; Liu, Jianjun; Pan, Jinbo; Ma, Hecheng; Zuo, Shengli; Yu, Yingchun; Ahmad, Aftab; Li, Baoshan

doi:10.1016/j.mssp.2018.04.028

Cited by 30 publications

(8 citation statements)

References 44 publications

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“…Bare CdS QDs gave broad and intense PL band signals ascribed to the radiatively excited self-trapped recombination. Whereas the PL emission spectrum of 1%CdS QDs/CQDs/H-TiO 2 nanocomposite exhibited the quenched-inferior intensity signal band, which expresses additional efficient charge migration and hence sustained prolong the lifetime of electron–hole pair separation. , …”

Section: Resultsmentioning

confidence: 96%

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Fabrication of Highly Efficient and Hierarchical CdS QDs/CQDs/H-TiO₂ Ternary Heterojunction: Surpassable Photocatalysis under Sun-like Illumination

Khan

Liu

Pan

et al. 2018

Ind. Eng. Chem. Res.

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Highly efficient and durable visible-light-utilized nanocomposites have a vital role in environmental pollutants remediation. Hence, in this study, we have fabricated CdS QDs cosensitized CQDs/H-TiO2 (hollow titania) ternary heterostructures (CdS QDs/CQDs/H-TiO2) in a facile region-selective deposition route. The as-fabricated nanocomposites were evidently characterized by physicochemical techniques. CdS QDs were uniformly distributed on the smooth surface of hierarchical CQDs/H-TiO2 heterojunction. The as-prepared CdS QDs/CQDs/H-TiO2 nanocomposite has high-performances for efficient degradation efficacy of phenol, MB, and RhB, which exhibited enhanced degradation activities with rate constants (k) of 0.03, 0.051, and 0.045 min–1, respectively. All these superior photocatalytic activities obviously attributed to the effect of calcination temperature, enhanced photocurrent, minimized recombination of photoinduced charges in the photocatalysis and optimum content of CdS QDs have the distinct basis for the close interfacial connection developing. In addition, evidenced on the arguable results of electron spin resonance (ESR) and radical-trapping experiments, the primary reactive-oxygen species and a plausible reaction-mechanism for organic pollutants degradation over CdS QDs/CQDs/H-TiO2 were proposed. This creative work is strategically considered an important step to potentially enhance the utilization of TiO2 in various fields as visible-light-induced heterojunction.

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Section: Resultsmentioning

confidence: 96%

“…Whereas the PL emission spectrum of 1%CdS QDs/CQDs/H-TiO 2 nanocomposite exhibited the quenched-inferior intensity signal band, which expresses additional efficient charge migration and hence sustained prolong the lifetime of electron−hole pair separation. 55,56 3.2. Photocatalytic Performances.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Highly Efficient and Hierarchical CdS QDs/CQDs/H-TiO₂ Ternary Heterojunction: Surpassable Photocatalysis under Sun-like Illumination

Khan

Liu

Pan

et al. 2018

Ind. Eng. Chem. Res.

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“…In recent years, water pollution caused by organic pollutants from different industries, such as paper, textile, pigment, cosmetic, food and drug manufacturing has become a global issue due to its diverse effects on environment and living organisms [1][2][3][4]. Several conventional treatment methods of organic pollutants from wastewater including biodegradation, absorption, membrane filtration, flocculation-coagulation and ozonation have a common drawback because they are unable to completely remove dyes from wastewater, including the cause of secondary pollution and expensive treatment process [1,2,4,5]. Thus, a visible light driven photocatalyst as green technology has been focused in the degradation of environmental pollutants under visible light by active radicals because visible light is available in the solar spectrum and is abundant (∼43%) much more than UV light (∼4%) [2,[5][6][7].…”

Section: Introductionmentioning

confidence: 99%

PREPARATION AND CHARACTERIZATION OF VISIBLE-LIGHT-DRIVEN Ce-DOPED CdS NANOWIRES FOR PHOTODEGRADATION OF RHODAMINE B

PHURUANGRAT¹,

SAKHON²,

THONGTEM³

et al. 2021

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Visible-light-driven Ce-doped CdS nanowires were synthesized by a solvothermal method. Phase and morphology of Ce-doped CdS nanowires were investigated by XRD and SEM analyses. The analytical results certified that both CdS and Ce-doped CdS samples were uniform pure phase of hexagonal CdS nanowires. The photocatalytic activities of CdS and Ce-doped CdS nanowires were investigated through the photodegradation of rhodamine B (RhB) under visible light irradiation. The 3% Ce-doped CdS nanowires have the highest photocatalytic efficiency of 95.75% within 120 min and are the promising material used for wastewater treatment.

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“…Expanded perlite (EP) can be obtained from naturally occurring perlite by the evaporation of water content, and then heating at 850 °C causes volume expansion up to 20-fold of the original one. EP has very low density due to which it floats on the surface of water. , The main constituents of perlite are silica (SiO 2 ≈ 80%), alumina (Al 2 O 3 ≈ 18%), and other metal oxides. Herein, expanded perlite (EP) immobilized bismuth tungstate semiconductor cosensitized bismuth-doped bismuth sulfide (Bi–Bi 2 S 3 –Bi 2 WO 6 @EP) was for the first time fabricated by a one-pot hydrothermal process.…”

Section: Introductionmentioning

confidence: 96%

“…EP has very low density due to which it floats on the surface of water. 42,43 The main constituents of perlite are silica (SiO 2 ≈ 80%), alumina (Al 2 O 3 ≈ 18%), and other metal oxides. Herein, expanded perlite (EP) immobilized bismuth tungstate semiconductor cosensitized bismuth-doped bismuth sulfide (Bi−Bi 2 S 3 −Bi 2 WO 6 @EP) was for the first time fabricated by a one-pot hydrothermal process.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Fabrication of Hierarchical Floating Bi–Bi₂S₃–Bi₂WO₆/Expanded Perlite Photocatalysts for Efficient Photocatalysis of Organic Contaminants Utilized Sunlike Illumination

Khan

Liu

Pan

et al. 2019

Ind. Eng. Chem. Res.

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Photocatalysis currently faces a number of challenging issues, such as low efficiency, expensive precursors of noble metals, and difficult recycling of powder, which are grievous impeders for powder photocatalysts in practical applications of environmental remediation. Hence, we have fabricated desirable cabbagelike floating Bi–Bi2S3–Bi2WO6@EP (expanded perlite) photocatalysts via a one-pot modified hydrothermal process. The structural morphology and reaction mechanism of as-fabricated designed photocatalysts were comprehensively investigated by physicochemical techniques. The photocatalytic efficacies of 1% Bi–Bi2S3–Bi2WO6@EP were obviously evaluated by the degradation of 4-chlorophenol (4-CP), rhodamine B (RhB), and methyl orange (MO) with enhanced rate constants (k) of 0.051, 0.073, and 0.075 min–1, respectively, utilizing sunlike irradiation. All these enhanced photocatalytic efficacies are assigned to the successful deposition of optimal contents of ternary heterojunction (3C), surface plasmon resonance effect (SPR) of Bi, enhanced photocurrent, maximum mobility of photoinduced charge carriers, efficient direct illumination, and aerated oxygenation and photogeneration of most reactive species.

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Fabrication of floating CdS/EP photocatalyst by facile liquid phase deposition for highly efficient degradation of Rhodamine B (RhB) under visible light irradiation

Cited by 30 publications

References 44 publications

Fabrication of Highly Efficient and Hierarchical CdS QDs/CQDs/H-TiO₂ Ternary Heterojunction: Surpassable Photocatalysis under Sun-like Illumination

Fabrication of Highly Efficient and Hierarchical CdS QDs/CQDs/H-TiO₂ Ternary Heterojunction: Surpassable Photocatalysis under Sun-like Illumination

PREPARATION AND CHARACTERIZATION OF VISIBLE-LIGHT-DRIVEN Ce-DOPED CdS NANOWIRES FOR PHOTODEGRADATION OF RHODAMINE B

One-Pot Fabrication of Hierarchical Floating Bi–Bi₂S₃–Bi₂WO₆/Expanded Perlite Photocatalysts for Efficient Photocatalysis of Organic Contaminants Utilized Sunlike Illumination

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Fabrication of floating CdS/EP photocatalyst by facile liquid phase deposition for highly efficient degradation of Rhodamine B (RhB) under visible light irradiation

Cited by 30 publications

References 44 publications

Fabrication of Highly Efficient and Hierarchical CdS QDs/CQDs/H-TiO2 Ternary Heterojunction: Surpassable Photocatalysis under Sun-like Illumination

Fabrication of Highly Efficient and Hierarchical CdS QDs/CQDs/H-TiO2 Ternary Heterojunction: Surpassable Photocatalysis under Sun-like Illumination

PREPARATION AND CHARACTERIZATION OF VISIBLE-LIGHT-DRIVEN Ce-DOPED CdS NANOWIRES FOR PHOTODEGRADATION OF RHODAMINE B

One-Pot Fabrication of Hierarchical Floating Bi–Bi2S3–Bi2WO6/Expanded Perlite Photocatalysts for Efficient Photocatalysis of Organic Contaminants Utilized Sunlike Illumination

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Fabrication of Highly Efficient and Hierarchical CdS QDs/CQDs/H-TiO₂ Ternary Heterojunction: Surpassable Photocatalysis under Sun-like Illumination

Fabrication of Highly Efficient and Hierarchical CdS QDs/CQDs/H-TiO₂ Ternary Heterojunction: Surpassable Photocatalysis under Sun-like Illumination

One-Pot Fabrication of Hierarchical Floating Bi–Bi₂S₃–Bi₂WO₆/Expanded Perlite Photocatalysts for Efficient Photocatalysis of Organic Contaminants Utilized Sunlike Illumination