Highly efficient visible light driven photocatalytic activities of the LaCuS2-graphene composite-decorated ordered mesoporous silica

Nguyen, Dinh Cung Tien; Woo, Jung-Hun; Cho, Kwang Youn; Jung, Chong‐Hun; Oh, Won‐Chun

doi:10.1016/j.seppur.2018.05.019

Cited by 13 publications

(1 citation statement)

References 32 publications

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“…The VB level was obtained by subtracting the Eg energy from the eCB level. The VB positions of pure AgZnS, AgZnS-G, and AgZnS-G-T were calculated as 1.866, 1.746, and 1.236 eV vs. SHE, respectively [ 31 , 37 ]. The band alignment of the as-fabricated photocatalysts was schematically shown in Figure 6 b.…”

Section: Resultsmentioning

confidence: 99%

Novel Approach to Synthesis of AgZnS and TiO2 Decorated on Reduced Graphene Oxide Ternary Nanocomposite for Hydrogen Evolution Effect of Enhanced Synergetic Factors

et al. 2022

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In this work, a novel ternary nanocomposites AgZnS-TiO2-reduced graphene oxide (RGO) was successfully synthesized by a facile soft ultrasonic-reduction condition as low as 70 °C. During the ultrasound reaction, the reduction of GO and the growth of AgZnS and TiO2 crystals occurred simultaneously in conjunction with the deposition of AgZnS and TiO2 crystals onto the surface of the graphene. The synthesized nanocatalysts were characterized by XRD, SEM, TEM, EDX, Raman spectroscopy, XPS, UV–Vis DRS, photoluminescence spectrometer, and photocurrent and CV. The AgZnS-G-T was shown as catalytic HER with some synnegetic factors such as pH-universal, temperature, and ultrasonic condition. After 4 h, it was observed that AgZnS-TiO2-RGO has the highest efficiency of photocatalytic activity through hydrogen production by water splitting, which achieved the highest hydrogen evolution rate of 930.45 μmol/g at buffer solution (pH = 5), which was superior to AgZnS-G (790.1 µmole/g) and AgZnS (701.2 µmole/g). Such a significant hydrogen evolution amount far exceeded that of undoped TiO2 and RGO. The H2 evolution amounts increased significantly at ultrasonic irradiation power of 80 MHz. AgZnS-G-T demonstrates the higher H2 evolution amounts of 985 µmole/g at 80 MHz. Its photocatalytic hydrogen-evolution activity remained at a high level over four cycles (16 h) nanoparticle.

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Section: Resultsmentioning

confidence: 99%

Novel Approach to Synthesis of AgZnS and TiO2 Decorated on Reduced Graphene Oxide Ternary Nanocomposite for Hydrogen Evolution Effect of Enhanced Synergetic Factors

et al. 2022

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Effects of reaction parameters on the preparation of P4VP/SiO₂ composite aerogel via supercritical CO₂ drying

et al. 2019

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Herein, crosslinked poly (4-vinylpyridine)/SiO 2 (P4VP/SiO 2 ) composite aerogel, an organic-inorganic interpenetrating network, was successfully prepared by means of the sol-gel process, acid-base interaction method, and supercritical CO 2 drying process. In this novel composite aerogel, SiO 2 was used as an inorganic material, and nitrogen-containing heterocyclic polymer was used as the active component. The effects of aging time, monomer ratios, solvent usage, and cross-linker ratios were analyzed to obtain the optimal conditions for the P4VP/SiO 2 aerogel formation. The as-prepared aerogel was characterized by using FT-IR, XRD, Brunauer-Emmett-Teller (BET) analysis, and SEM analysis. Results showed that the aging time of 48 h, tetraethoxysilane (TEOS)/4-vinylpyridine (4-VP) mass ratio of 2:1, and diethylene glycol dimethacrylate (DEGDMA) content lower than 20 wt% were required to ensure the best porous amorphous structure of the product. These optimal conditions endowed the product with a relative high BET specific area (314 m 2 /g) and a low density (0.12 g/cm 3 ). The adsorption performance of P4VP/SiO 2 was investigated via its capacity to remove Cu(II) from wastewater. Results showed that the adsorption capacity of up to 85 mg/g was attained under neutral conditions and the adsorption process highly follows the pseudo-second-order kinetics model.

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Immobilization of semiconductor photocatalysts

Pârvulescu

Ciobanu

Petcu

2020

Handbook of Smart Photocatalytic Materials

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Highly efficient visible light driven photocatalytic activities of the LaCuS2-graphene composite-decorated ordered mesoporous silica

Cited by 13 publications

References 32 publications

Novel Approach to Synthesis of AgZnS and TiO2 Decorated on Reduced Graphene Oxide Ternary Nanocomposite for Hydrogen Evolution Effect of Enhanced Synergetic Factors

Novel Approach to Synthesis of AgZnS and TiO2 Decorated on Reduced Graphene Oxide Ternary Nanocomposite for Hydrogen Evolution Effect of Enhanced Synergetic Factors

Effects of reaction parameters on the preparation of P4VP/SiO₂ composite aerogel via supercritical CO₂ drying

Immobilization of semiconductor photocatalysts

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Highly efficient visible light driven photocatalytic activities of the LaCuS2-graphene composite-decorated ordered mesoporous silica

Cited by 13 publications

References 32 publications

Novel Approach to Synthesis of AgZnS and TiO2 Decorated on Reduced Graphene Oxide Ternary Nanocomposite for Hydrogen Evolution Effect of Enhanced Synergetic Factors

Novel Approach to Synthesis of AgZnS and TiO2 Decorated on Reduced Graphene Oxide Ternary Nanocomposite for Hydrogen Evolution Effect of Enhanced Synergetic Factors

Effects of reaction parameters on the preparation of P4VP/SiO2 composite aerogel via supercritical CO2 drying

Immobilization of semiconductor photocatalysts

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Product

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About

Effects of reaction parameters on the preparation of P4VP/SiO₂ composite aerogel via supercritical CO₂ drying