Adsorption and visible light-driven photocatalytic degradation of Rhodamine B in aqueous solutions by Ag@AgBr/SBA-15

Hu, Longxing; Yuan, Hang; Zou, Lianpei; Chen, Feiyan; Hu, Xing

doi:10.1016/j.apsusc.2015.04.166

Cited by 61 publications

(28 citation statements)

References 60 publications

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“…This result can be attributed to the large number of imidacloprid molecules adsorbed on the catalyst surface, thereby impeding the surface‐active sites from being involved in the degradation reaction (Figure S5, Supporting Information) . Furthermore, the degradation of by‐products can compete with organic molecules on the catalyst surface and result in active sites blocking . The degradation of imidacloprid conformed to the first‐order kinetics (Figure S6, Supporting Information) with the kinetic constant of imidacloprid degradation of 0.00497–0.00142 cm −1 at a concentration of 0.05–0.30 mmol L −1 .…”

Section: Resultsmentioning

confidence: 97%

Ionic‐Liquid‐Assisted Hydrothermal Synthesis of Ag/AgBr for Photodegradation of Imidacloprid under Visible Light

Guo

Zhu

Chen

et al. 2019

CLEAN Soil Air Water

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Ag/AgBr photocatalysts are prepared by a ionic-liquid-assisted hydrothermal method. The as-prepared photocatalysts are characterized by scanning electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller measurement, and diffuse reflectance spectroscopy. Ag/AgBr exhibits significant photocatalytic activity toward degradation of imidacloprid under visible light. After 9 h, the conversion percentage of imidacloprid reaches 90%. Besides, the cycle performances suggest a good stability of the catalyst. The photocatalytic kinetics indicate that the degradation processes follow pseudo-first-order kinetics. According to the fact that electron holes • OH and • O 2 À greatly promote the photodegradation process, the degradation mechanism is proposed.

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Section: Resultsmentioning

confidence: 97%

Ionic‐Liquid‐Assisted Hydrothermal Synthesis of Ag/AgBr for Photodegradation of Imidacloprid under Visible Light

Guo

Zhu

Chen

et al. 2019

CLEAN Soil Air Water

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“…As is well known, RhB as an organic dye existed in water can cause serious water pollution problems [24]. In this work, the RhB was chosen as model molecules to investigate the adsorption/photocatalytic activity of TiO 2− x N x @SiO 2 composite aerogels.…”

Section: Photocatalytic Activity Of Tio 2− X N X @Sio 2 Aerogelsmentioning

confidence: 99%

Preparation of Highly Stable and Effective N-Doped TiO₂@SiO₂ Aerogel Catalyst for Degradation of Organic Pollutants by Visible Light Catalysis

Tang

Ran

Jie

et al. 2019

Journal of Chemistry

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To obtain high stable and effective TiO2 photocatalyst, nano-N-doped TiO2@SiO2 (TiO2−xNx@SiO2, 0 ≤ x ≤ 2) composite aerogels were synthesized by the sol-gel method combined with supercritical drying and direct oxidation process. The adsorption/photocatalytic degradation efficiency of TiO2−xNx@SiO2 aerogels was evaluated by the degradation of RhB in aqueous solution under visible light irradiation. The physiochemical properties of the aerogels were examined by XRD, FT-IR, TEM, SEM, TG/DTA, and BET methods. It was found that the specific surface areas of all TiO2−xNx@SiO2 samples exceeded 700 m2/g and exhibited a honeycomb porous structure with fine particulate morphology. Photocatalytic activity tests show that the 500-TiO2@SiO2 composite aerogel exhibits the best adsorption/photocatalytic degradation rate for RhB, which obtained about 80% of the degradation rate in 30 min under visible light and over 95% after 120 min. On the one hand, the SiO2 aerogels can significantly inhibit the phase transition of TiO2, and the nano TiO2 can be highly dispersed in the SiO2 aerogels; On the other hand, if the oxidation temperature is selected properly, the N-doped TiO2−xNx@SiO2 aerogel can be obtained by simple TiN@SiO2 aerogel oxidation.

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“…This leads to decrease in the percentage removal of the dye. In contrast, at low concentrations, number of catalytic sites are not being the limiting factor and the rate of degradation will be proportional to the concentration of the dye (Thennarasu and Sivasamy 2013;Gupta et al2011;Hu et al 2015;Taleb 2014;Ahmed et al 2011). The optimum concentration is fixed as 2.0 9 10 -5 M for ZnO, 0.8 9 10 -5 M for CeO 2 , 3.1 9 10 -5 M for (ZnO/CeO 2 ) and 6.2 9 10 -5 M for (ZnO/CeO 2 )-b-CD system.…”

Section: Oh Andmentioning

confidence: 99%

Enhanced photocatalytic performance of (ZnO/CeO2)-β-CD system for the effective decolorization of Rhodamine B under UV light irradiation

Velusamy¹,

Lakshmi²

2017

Appl Water Sci

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In this work, we attempt a new approach for the study on photocatalytic ability of (ZnO/CeO 2 ) improved by b-CD under UV light irradiation for the photodecolorization of RhB. The (ZnO/CeO 2 ) composite was prepared by mixing ZnO with CeO 2 in a weight ratio of 4:1. The surface interaction of (ZnO/CeO 2 ) with b-CD was determined by characterizing their structural, morphological and optical properties. The formation of an inclusion complex between RhB dye and b-CD was confirmed by UV-visible spectral analyses. The photocatalytic activity of (ZnO/CeO 2 )-b-CD system was evaluated by the decolorization of RhB dye in aqueous solution under UV light irradiation. The effects of operational parameters like the ratio of (ZnO/CeO 2 ), initial concentration of dye, catalyst dose, irradiation time and pH have been analyzed. The photocatalytic decolorization of RhB follows pseudo-first order kinetics. The mineralization of RhB has been confirmed by COD measurements. A possible mechanism for the photocatalytic decolorization of RhB by (ZnO/CeO 2 )-b-CD system under UV light irradiation was also discussed.

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Adsorption and visible light-driven photocatalytic degradation of Rhodamine B in aqueous solutions by Ag@AgBr/SBA-15

Cited by 61 publications

References 60 publications

Ionic‐Liquid‐Assisted Hydrothermal Synthesis of Ag/AgBr for Photodegradation of Imidacloprid under Visible Light

Ionic‐Liquid‐Assisted Hydrothermal Synthesis of Ag/AgBr for Photodegradation of Imidacloprid under Visible Light

Preparation of Highly Stable and Effective N-Doped TiO₂@SiO₂ Aerogel Catalyst for Degradation of Organic Pollutants by Visible Light Catalysis

Enhanced photocatalytic performance of (ZnO/CeO2)-β-CD system for the effective decolorization of Rhodamine B under UV light irradiation

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Adsorption and visible light-driven photocatalytic degradation of Rhodamine B in aqueous solutions by Ag@AgBr/SBA-15

Cited by 61 publications

References 60 publications

Ionic‐Liquid‐Assisted Hydrothermal Synthesis of Ag/AgBr for Photodegradation of Imidacloprid under Visible Light

Ionic‐Liquid‐Assisted Hydrothermal Synthesis of Ag/AgBr for Photodegradation of Imidacloprid under Visible Light

Preparation of Highly Stable and Effective N-Doped TiO2@SiO2 Aerogel Catalyst for Degradation of Organic Pollutants by Visible Light Catalysis

Enhanced photocatalytic performance of (ZnO/CeO2)-β-CD system for the effective decolorization of Rhodamine B under UV light irradiation

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Preparation of Highly Stable and Effective N-Doped TiO₂@SiO₂ Aerogel Catalyst for Degradation of Organic Pollutants by Visible Light Catalysis