Photocatalytic degradation of malachite green dye by ZnO and ZnO–β-cyclodextrin nanocomposite

Yadav, Reena; Chundawat, Tejpal Singh; Rawat, Pooja; Rao, Gyaneshwar K; Vaya, Dipti

doi:10.1007/s12034-021-02533-z

Cited by 49 publications

(25 citation statements)

References 22 publications

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“…βCD has been studied for its use in modifying semiconductor photocatalysts for the removal of pollutants from waste streams. [7][8][9] Sakthivel and Velusamy [10] found that βCDmodified CeO 2 , TiO 2 , and ZnO exhibited superior photocatalytic activity than bare catalyst systems. Unlike adsorption by porous materials, the organic pollutants were combined with the hydroxyl groups of βCD.…”

Section: Instructionmentioning

confidence: 99%

Preparation of βCD‐AC functionalized ZnO/ZnSe for photocatalytic degradation of organic dye wastewater

Tian

Yang

Zhang

et al. 2023

Applied Organom Chemis

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Conventional photocatalysts for degrading pollutants are limited because of the rapid recombination of electron-hole pair, difficulty in separation and recovery, and low efficiency in utilizing the visible light. To improve the adsorption capacity of the photocatalyst and reduce electron-hole recombination rate, βCD was anchored onto the porous activated carbon (AC) and then combined with ZnO/ZnSe to prepare βCD-AC-ZnO/ZnSe. The ZnO was a quasi-hexahedron shape in the ZnO/ZnSe heterojunction and was tightly integrated with the βCD-AC, which could improve the transfer ability of the photogenerated carrier. Considering the synergistic effect of βCD-AC and ZnO/ZnSe, the UV absorption edge was red shifted, and the lifetime of the electrons-hole pairs was prolonged. Thus, the photocatalytic degradation ration of βCD-AC-ZnO/ZnSe reached 82% under visible light, which was about 1.8 and 4.2 times higher than those of the virgin heterojunction and AC-ZnO/ ZnSe, respectively. βCD-AC-ZnO/ZnSe exhibited excellent disinfection potential that 3.5 log Escherichia coli cells were killed for 120 min. The highefficiency visible-light photocatalytic performance was demonstrated, and the •O 2À played a main active role in the photocatalytic removal of pollutants. The present research provided a valuable route for the fabrication of photocatalyst for real-world applications.

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Section: Instructionmentioning

confidence: 99%

Preparation of βCD‐AC functionalized ZnO/ZnSe for photocatalytic degradation of organic dye wastewater

Tian

Yang

Zhang

et al. 2023

Applied Organom Chemis

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“…[7] Several transition metal oxides are used for photocatalytic process like TiO 2 and ZnO. [8][9][10] Photocatalytic process of TiO 2 for Cr VI reduction under solar irradiation included following steps (i) production of electron-hole pairs; (ii) adsorption of Cr VI ; (iii) redox reaction and (iv) desorption of the products. Due to the nanostructure of TiO 2 , it provides more surface area which is more favourable for adsorption.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Reduction of Cr ^VI by TiO₂/GO Nanocomposite

et al. 2022

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Graphene Oxide (GO) was successfully deposited on TiO2 NPs through sol‐gel process. The fabricated TiO2/GO (T/G) nanocomposite was used for reduction of CrVI under simulated solar light illumination. 10 wt. % GO was used for the preparation of T/ G nanocomposite. Several analytical methods such as powder X‐ray diffraction (PXRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and UV‐visible diffuse reflectance spectra (DRS) spectrophotometer was used to characterize the samples. The PXRD revealed the formation of the anatase phase of TiO2 NPs and T/G nanocomposites, as per literature more favourable form of TiO2 for photocatalytic activity. The average crystallite size was found 5.1 nm and 23 nm for TiO2 NPs and T/G nanocomposite respectively. Under the simulated sunlight illumination, the TiO2 NPs was excited to generate the electron‐hole pairs and then the photo‐generated electron transferred by the GO to the CrVI which further converted into CrIII. The band gap for T/G nanocomposite was calculated 2.92 eV. Under visible light,27.3 % photoreduction of (10 mg/L) CrVI solution at λmax=347 nm was achieved within 90 min on the T/G sample at the pH 5–6 while overall reduction was 48 % including adsorption. The rate of reaction was found 0.00305 min−1 and the order of reaction was pseudo first order.

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“…SBA‐15‐PS phthalhydrazide nanohybrid used in the degradation of Methyl Orange with 92 % efficiency [18] . A series semiconductors like TiO 2 , CuO, ZnO and Fe 2 O 3 reported in literature to remove phenolic compounds from waste water [19,20] . Nanomaterials were generally used to fasten the degradation of hazardous organic chemical compounds [21] .…”

Section: Introductionmentioning

confidence: 99%

“…[18] A series semiconductors like TiO 2 , CuO, ZnO and Fe 2 O 3 reported in literature to remove phenolic compounds from waste water. [19,20] Nanomaterials were generally used to fasten the degradation of hazardous organic chemical compounds. [21] ZnO NPs can be prepared by using a number of methods like homogeneous precipitation, sol-gel processing and mechanical milling etc.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Ortho‐Nitrophenol using ZnO‐β‐CD Nanocomposite

et al. 2022

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Phenolic compounds are present as pollutant in the industrial waste water. The present work deals with the photocatalytic degradation of Ortho-Nitrophenol by using Zinc oxide Nanoparticles (ZnO NPs) and its composite with β-Cyclodextrin (β-CD) represented as ZnO-β-CD. ZnO NPs were prepared by using Sol Gel Method. The morphological and structural properties were studied using SEM EDAX, PXRD, FT-IR and UV-DRS. Effect of pH was also studied. ZnO NPs degraded the Ortho-Nitrophenol up to 25.8 % and it was enhanced by the addition of β-CD up to 88.9 % in 100 minutes. Catalysts used were 1 g/L during the degradation.

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Photocatalytic degradation of malachite green dye by ZnO and ZnO–β-cyclodextrin nanocomposite

Cited by 49 publications

References 22 publications

Preparation of βCD‐AC functionalized ZnO/ZnSe for photocatalytic degradation of organic dye wastewater

Preparation of βCD‐AC functionalized ZnO/ZnSe for photocatalytic degradation of organic dye wastewater

Photocatalytic Reduction of Cr ^VI by TiO₂/GO Nanocomposite

Photocatalytic Degradation of Ortho‐Nitrophenol using ZnO‐β‐CD Nanocomposite

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Photocatalytic degradation of malachite green dye by ZnO and ZnO–β-cyclodextrin nanocomposite

Cited by 49 publications

References 22 publications

Preparation of βCD‐AC functionalized ZnO/ZnSe for photocatalytic degradation of organic dye wastewater

Preparation of βCD‐AC functionalized ZnO/ZnSe for photocatalytic degradation of organic dye wastewater

Photocatalytic Reduction of Cr VI by TiO2/GO Nanocomposite

Photocatalytic Degradation of Ortho‐Nitrophenol using ZnO‐β‐CD Nanocomposite

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Photocatalytic Reduction of Cr ^VI by TiO₂/GO Nanocomposite