Visible light-driven photocatalytic degradation of rhodamine B and industrial dyes (texbrite BAC-L and texbrite NFW-L) by ZnO-graphene-TiO2 composite

Nuengmatcha, Prawit; Chanthai, Saksit; Mahachai, Ratana; Oh, Won‐Chun

doi:10.1016/j.jece.2016.03.045

Cited by 86 publications

(28 citation statements)

References 55 publications

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“…2A, the characteristic peaks at 2q ¼ 25. 35,38.00, 47.56, 54.15, 54.95, 63.05, 69.02 and 70.40 correspond to (1 0 1), (0 0 4), (2 0 0), (1 0 5), (2 1 1), (2 0 4), (1 1 6), and (2 2 0) planes respectively. These peaks represent pure anatase phase of titania according to JCPDS .…”

Section: Resultsmentioning

confidence: 99%

“…The obtained results can be attributed to the characteristic light adsorption potential of GO contained in the nanocomposite and to high rate of charge migrations between the semiconductors (titania and ZnO) and rGO layers. 43 3.1.6 FESEM. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Finally, the obtained ne powder was annealed at 600 C for 2 h to achieve the wurtzite phase of ZnO. 38 2.5 Preparation of rGO/ZnO/TiO 2 rGO/ZnO/TiO 2 (GZnTi) was synthesized through facile hydrothermal method. A suitable amount of GO (0.05, 0.075 and 0.1 gr GO for 5, 7.5 and 10 wt%, respectively) was dissolved in a mixture containing 20 mL DI water and 40 mL AE and sonicated for 1 h. Then, 0.1 g of ZnO and 0.9 g TiO 2 (10% ZnO/90% TiO 2 ) were added to the prepared mixture and sonicated for another 2 h to attain a homogeneous suspension.…”

Section: Preparation Of Znomentioning

confidence: 99%

“…In this way, the effective roles of rGO nanosheets result in reduction of e/h recombination rate, thus enhancing photocatalytic performance of the nanocomposite. 38 The created electrons and holes are trapped by O 2 and H 2 O molecules, generating highly active peroxide and hydroxyl radicals, respectively. Therefore, the generated radicals attack the organic pollutants such as phenol molecules and oxidize them to intermediate by-products, which are nally mineralized to CO 2 and H 2 O.…”

Section: Mineralizationmentioning

confidence: 99%

“…Therefore, the generated radicals attack the organic pollutants such as phenol molecules and oxidize them to intermediate by-products, which are nally mineralized to CO 2 and H 2 O. 38 3.2.12 Real wastewater treatment. In order to evaluate the effectiveness of GZnTi nanocomposite in practical industrial uses, real petrochemical wastewater was utilized for treatment via GZnTi at pH ¼ 4 and catalyst dosage of 0.6 g L À1 under visible light irradiation.…”

Section: Mineralizationmentioning

confidence: 99%

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Photocatalytic decontamination of phenol and petrochemical wastewater through ZnO/TiO₂ decorated on reduced graphene oxide nanocomposite: influential operating factors, mechanism, and electrical energy consumption

et al. 2018

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anchored on a reduced graphene oxide (rGO) ternary nanocomposite heterojunction was synthesized via the multi-step method including hydrothermal, solvothermal and sol-gel methods. XRD, Raman, FESEM, EDX, Dot Mapping EDS, BET, FTIR, UV-VIS, TGA, and EIS techniques were utilized for characterizing as-synthesized catalysts. The XRD and Raman data proved the formation of anatase phase TiO 2 and wurtzite phase ZnO in the prepared samples. Further, the UV-Vis spectrum confirmed that the band gap value of ZnO/TiO 2 diminished on introduction of graphene oxide. Photocatalytic performance of the fabricated catalysts was investigated by decontamination of phenol in aqueous solutions. The effect of different operational factors such as pH, catalyst dosage, phenol concentration, and light illumination was investigated to find the optimum decontamination conditions. According to the results, complete degradation of phenol was achieved at pH ¼ 4, catalyst dosage of 0.6 g L À1 , light intensity of 150 W, and phenol initial concentration of 60 ppm at 160 min under visible light illumination. With the addition of graphene oxide to the composite, a significant increase was detected in the photocatalytic performance due to the higher available surface area and lower electron/hole recombination rate. In addition, the scavenging experiments revealed that the $OH is responsible for the degradation of phenol during the reaction. The degradation mechanism, economic performance, mineralization, and recyclability were also investigated. Kinetic studies confirmed that photocatalytic degradation process followed the pseudo-first-order kinetic model. A case of real wastewater treatment was used to examine the performance of the catalyst for real case studies.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Preparation Of Znomentioning

confidence: 99%

Section: Mineralizationmentioning

confidence: 99%

Section: Mineralizationmentioning

confidence: 99%

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Photocatalytic decontamination of phenol and petrochemical wastewater through ZnO/TiO₂ decorated on reduced graphene oxide nanocomposite: influential operating factors, mechanism, and electrical energy consumption

et al. 2018

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Photocatalytic degradation of Rhodamine B dye using low‐cost pyrofabricated titanium dioxide quantum dots‐kaolinite nanocomposite

Awad

Farrag

El-Bindary

et al. 2023

Applied Organom Chemis

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In this study, we report a simple technique for the pyrofabrication of a novel photocatalyst of titanium dioxide quantum dots-kaolinite nanocomposite (TiO 2 -QDs-Kao) used for rhodamine B (RhB) dye degradation. The photocatalyst was characterized by using different analytical techniques, including XRD, XRF, XPS, FTIR, DTA/TGA, SEM-EDX, TEM, BET, BJH, ZP and UV-Vis DRS. The photocatalytic degradation of RhB was performed in aqueous solutions using the sustainable sunlight energy under atmospheric conditions and fixed neutral medium (pH = 7). The produced photocatalyst exhibited optical band gap energy of 2.85 eV, an improved large specific surface area of 107.724 m 2 /g with pore radius of 1.45 nm and total pore volume of 0.123 cm 3 /g.The study indicated a maximum 91% degradation efficiency of RhB after 120 min using the optimum dose 1,400 mg/l of the TiO 2 -QDs-Kao photocatalyst. The degradation of RhB dye fitted the Langmuir first-order kinetics with rate constant 0.0151 min À1 . The radical trapping experiments based on scavengers confirmed that the mechanism of photocatalytic degradation activity was potentially based on electron (e À ) and hole (h + ) conduction band. The potential energy of the valence and conduction bands E VB and E CB were calculated 2.73 and À0.12 eV, respectively. A triple reusability study confirmed a high stability of TiO 2 -QDs-Kao photocatalyst with detected degradation efficiencies of 91.0, 89.9, 88.8 and 87.5%, respectively.

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In‐situ construction of Bi₂O₂CO₃/MIL‐101(Cr) nanosheet catalyst for enhanced photocatalytic degradation of organic dye molecules from water

Zhang,

Xie,

Wang

et al. 2024

Applied Organom Chemis

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For nearly a century, the excessive discharge of organic contaminants has gradually polluted water and endangered people's health, and photocatalysis has been prominently employed to remove persistent recalcitrant organic. Here, MIL‐101(Cr) was firstly employed to introduce thin‐layered Bi2O2CO3 for the formation of Bi2O2CO3/MIL‐101(Cr) nanosheet composite, by a simple and low‐temperature in‐situ growth approach. The phase, morphology, optical, and surface characteristics of the fabricated composite were characterized through XRD, FTIR, SEM‐EDS, N2 adsorption–desorption, UV–Vis DRS, PL, TG, and XPS techniques, and the ability in the photocatalytic breakdown of rhodamine B (RhB) molecule under visible light was also studied. The results of characterization analysis and optical analysis exhibited that Bi2O2CO3/MIL‐101(Cr) has large pore size, good visible light response‐ability, and the heterojunction created by intercalating Bi2O2CO3 on MIL‐101(Cr). Photocatalytic studies revealed that Bi2O2CO3/MIL‐101(Cr) had superior RhB degradation activity than pure MIL‐101(Cr) and Bi2O2CO3, which achieved 97.1% with visible light irradiation for 20 mg/l RhB. Meanwhile, the Bi2O2CO3/MIL‐101(Cr) composite displayed good recyclability after three cycles as revealed by XRD and FTIR analysis proving their excellent stability. This study provides feasible insight into developing novel and efficient MIL‐101‐based heterojunction catalysts for environmental remediation in the future.

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Visible light-driven photocatalytic degradation of rhodamine B and industrial dyes (texbrite BAC-L and texbrite NFW-L) by ZnO-graphene-TiO2 composite

Cited by 86 publications

References 55 publications

Photocatalytic decontamination of phenol and petrochemical wastewater through ZnO/TiO₂ decorated on reduced graphene oxide nanocomposite: influential operating factors, mechanism, and electrical energy consumption

Photocatalytic decontamination of phenol and petrochemical wastewater through ZnO/TiO₂ decorated on reduced graphene oxide nanocomposite: influential operating factors, mechanism, and electrical energy consumption

Photocatalytic degradation of Rhodamine B dye using low‐cost pyrofabricated titanium dioxide quantum dots‐kaolinite nanocomposite

In‐situ construction of Bi₂O₂CO₃/MIL‐101(Cr) nanosheet catalyst for enhanced photocatalytic degradation of organic dye molecules from water

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Visible light-driven photocatalytic degradation of rhodamine B and industrial dyes (texbrite BAC-L and texbrite NFW-L) by ZnO-graphene-TiO2 composite

Cited by 86 publications

References 55 publications

Photocatalytic decontamination of phenol and petrochemical wastewater through ZnO/TiO2 decorated on reduced graphene oxide nanocomposite: influential operating factors, mechanism, and electrical energy consumption

Photocatalytic decontamination of phenol and petrochemical wastewater through ZnO/TiO2 decorated on reduced graphene oxide nanocomposite: influential operating factors, mechanism, and electrical energy consumption

Photocatalytic degradation of Rhodamine B dye using low‐cost pyrofabricated titanium dioxide quantum dots‐kaolinite nanocomposite

In‐situ construction of Bi2O2CO3/MIL‐101(Cr) nanosheet catalyst for enhanced photocatalytic degradation of organic dye molecules from water

Contact Info

Product

Resources

About

Photocatalytic decontamination of phenol and petrochemical wastewater through ZnO/TiO₂ decorated on reduced graphene oxide nanocomposite: influential operating factors, mechanism, and electrical energy consumption

Photocatalytic decontamination of phenol and petrochemical wastewater through ZnO/TiO₂ decorated on reduced graphene oxide nanocomposite: influential operating factors, mechanism, and electrical energy consumption

In‐situ construction of Bi₂O₂CO₃/MIL‐101(Cr) nanosheet catalyst for enhanced photocatalytic degradation of organic dye molecules from water