Improving photocatalytic activity by construction of immobilized Z-scheme CdS/Au/TiO2 nanobelt photocatalyst for eliminating norfloxacin from water

Li, Jingying; Xia, Zhi; Ma, Dong; Liu, Guocheng; Song, Ningning; Xiang, Dan; Zhang, Guodong; Chen, Qinghua

doi:10.1016/j.jcis.2020.10.088

Cited by 81 publications

(22 citation statements)

References 64 publications

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“…This enhances the absorption and utilization of visible light by Ag/CdS/MIL-101 (Cr)-0.6 and enhances its photocatalytic performance. [32,33] In accordance with the Kubelka-Munk way, [34,35] the band gap of MIL-101(Cr) and CdS were 2.34 eV and 2.32 eV, respectively (Figure 3b), and the maximum potential at the edge of the valence band of MIL-101(Cr) and CdS was 1.82 eV and 1.08 eV, respectively (Figure 3c). Combined with the band gap of MIL-101(Cr) and CdS, the conduction band potentials were À 0.52 eV and À 1.24 eV, respectively.…”

Section: Resultssupporting

confidence: 74%

“…MIL-101(Cr III ) is excited to form MIL-101(Cr III* ) under visible light, and then the electrons transfer from MIL-101(Cr III* ) to the valence band of CdS, and the holes in the valence band are combined. [19,32] In the Ag/CdS/MIL-101(Cr) composite system, nano-Ag act as electron acceptors to promote the transport and separation of light-generated electrons between the composite materials interface. [52] Meanwhile, the highenergy electrons obtained by the localized surface plasmon resonance effect of Ag nanoparticles can be transferred back to CdS/MIL-101(Cr) through the barrier from Ag nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

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Preparation of Ag/CdS/MIL‐101(Cr) Composite by Dual Solvent Method and Its Photocatalytic Hydrogen Production

et al. 2021

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MIL-101(Cr) with regular octahedron structure was synthesized by hydrothermal method, and CdS/MIL-101(Cr) was prepared by solution titration. CdS was introduced into the surface of MIL-101(Cr) matrix with large surface area and its pores to make it well dispersed and grow. On this basis, nano-Ag was compounded, and the charge transfer rate was increased and the optical response spectrum of CdS was prolonged by using the localized surface plasmon resonance effect of noble metals. The results showed that under visible light irradiation, Ag/CdS/ MIL-101(Cr)-0.6 ternary composite exhibited excellent photocatalytic H 2 generation rate (521.05 μmol/(g h), which was 1.9 times that of CdS/MIL-101(Cr)-0.4. This provides an idea for the synthesis of other high-performance photocatalytic materials.

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Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Preparation of Ag/CdS/MIL‐101(Cr) Composite by Dual Solvent Method and Its Photocatalytic Hydrogen Production

et al. 2021

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“…As shown in Figure 17, the 4-t-BP degradation decreased from 89.8% to 87.3% and 70.3% in the presence of nitrate and carbonate, respectively. The inhibition effect of CO and NO was due to: (1) the quenching of oxidizing species, such as hydroxyl radicals (OH • ), and positive holes (h ) by anions (Equations ( 1)-( 3)); (2) anions could compete with 4-t-BP molecules for the available active sites of the catalyst surface, which further affects the degradation process [68][69][70][71]. Several studies have highlighted that NO ions are usually weakly adsorbed on the surface of the catalyst and, thus, they slightly inhibit photodegradation reactions [69,72].…”

Section: Effect Of Ha and Coexisting Ions ( ) On The Degradation Of 4-t-bpmentioning

confidence: 99%

“…), and positive holes (h + ) by anions (Equations ( 1)-( 3)); (2) anions could compete with 4-t-BP molecules for the available active sites of the catalyst surface, which further affects the degradation process [68][69][70][71]. Several studies have highlighted that NO − 3 ions are usually weakly adsorbed on the surface of the catalyst and, thus, they slightly inhibit photodegradation reactions [69,72].…”

Section: Effect Of Ha and Coexisting Ions ( ) On The Degradation Of 4-t-bpmentioning

confidence: 99%

“…generated active chlorine species can selectively attack electron-rich organic compoun [74]. The complete 4-t-BP degradation in the presence of HCO could be most likely a tributed to the generated alkaline condition or the formation of more selective radica (CO • ) by the reaction of HCO with OH • (Equation ( 6)), which can promote the degrad tion of 4-t-BP [69,75].…”

Section: Effect Of Ha and Coexisting Ions ( ) On The Degradation Of 4-t-bpmentioning

confidence: 99%

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Ti2O3/TiO2-Assisted Solar Photocatalytic Degradation of 4-tert-Butylphenol in Water

2021

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Colored Ti2O3 and Ti2O3/TiO2 (mTiO) catalysts were prepared by the thermal treatment method. The effects of treatment temperature on the structure, surface area, morphology and optical properties of the as-prepared samples were investigated by XRD, BET, SEM, TEM, Raman and UV–VIS spectroscopies. Phase transformation from Ti2O3 to TiO2 rutile and TiO2 anatase to TiO2 rutile increased with increasing treatment temperatures. The photocatalytic activities of thermally treated Ti2O3 and mTiO were evaluated in the photodegradation of 4-tert-butylphenol (4-t-BP) under solar light irradiation. mTiO heated at 650 °C exhibited the highest photocatalytic activity for the degradation and mineralization of 4-t-BP, being approximately 89.8% and 52.4%, respectively, after 150 min of irradiation. The effects of various water constituents, including anions (CO32−, NO3, Cl and HCO3−) and humic acid (HA), on the photocatalytic activity of mTiO-650 were evaluated. The results showed that the presence of carbonate and nitrate ions inhibited 4-t-BP photodegradation, while chloride and bicarbonate ions enhanced the photodegradation of 4-t-BP. As for HA, its effect on the degradation of 4-t-BP was dependent on the concentration. A low concentration of HA (1 mg/L) promoted the degradation of 4-t-BP from 89.8% to 92.4% by mTiO-650, but higher concentrations of HA (5 mg/L and 10 mg/L) had a negative effect.

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Calcined ZnTi‐Layered Double Hydroxide Intercalated with H₃PW₁₂O₄₀ with Efficiently Photocatalytic and Adsorption Performances

Zou

Shi

Zhang

et al. 2021

Chemistry A European J

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Wastewater treatment is of great significance to environmental remediation. The exploration of efficient and stable methods for wastewater treatment is still a challenging issue. Herein, a heterojunction material with photocatalysis and adsorption properties has been designed to remove the complex pollutants from wastewater. The heterojunction material (ZnO/TiO 2 À PW 12 , PW 12 = [PW 12 O 40 ] 3À ) was synthesized by calcining the ZnTiÀ layered double hydroxide (ZnTi-LDH) intercalated with the Keggin-type polyoxometalate H 3 PW 12 O 40 . In the construction of ZnO/TiO 2 À PW 12 it was found that the polyanionic PW 12 remained unchanged in the process of forming the proposed heterojunction. The photochemical properties verify that heterojunction synergistic with PW 12 facilitated the separation of photoproduced electron-hole pairs and thus suppressed the recombination. Therefore, ZnO/TiO 2 À PW 12 exhibits excellent photocatalytic property, and the efficiency of Cr(VI) photoreduction reached more than 90 % in the first 3 min. Furthermore, the electrostatic force between the PW 12 and cationic dyes makes ZnO/ TiO 2 À PW 12 having an outstanding adsorption performance for cationic dyes, such as rhodamine B, crystal violet and methyl blue. Such heterojunction material combined with polyoxometalate puts forward new insights for the design of functional materials for water treatment with low cost and high efficiency.

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Improving photocatalytic activity by construction of immobilized Z-scheme CdS/Au/TiO2 nanobelt photocatalyst for eliminating norfloxacin from water

Cited by 81 publications

References 64 publications

Preparation of Ag/CdS/MIL‐101(Cr) Composite by Dual Solvent Method and Its Photocatalytic Hydrogen Production

Preparation of Ag/CdS/MIL‐101(Cr) Composite by Dual Solvent Method and Its Photocatalytic Hydrogen Production

Ti2O3/TiO2-Assisted Solar Photocatalytic Degradation of 4-tert-Butylphenol in Water

Calcined ZnTi‐Layered Double Hydroxide Intercalated with H₃PW₁₂O₄₀ with Efficiently Photocatalytic and Adsorption Performances

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Improving photocatalytic activity by construction of immobilized Z-scheme CdS/Au/TiO2 nanobelt photocatalyst for eliminating norfloxacin from water

Cited by 81 publications

References 64 publications

Preparation of Ag/CdS/MIL‐101(Cr) Composite by Dual Solvent Method and Its Photocatalytic Hydrogen Production

Preparation of Ag/CdS/MIL‐101(Cr) Composite by Dual Solvent Method and Its Photocatalytic Hydrogen Production

Ti2O3/TiO2-Assisted Solar Photocatalytic Degradation of 4-tert-Butylphenol in Water

Calcined ZnTi‐Layered Double Hydroxide Intercalated with H3PW12O40 with Efficiently Photocatalytic and Adsorption Performances

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Product

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Calcined ZnTi‐Layered Double Hydroxide Intercalated with H₃PW₁₂O₄₀ with Efficiently Photocatalytic and Adsorption Performances