Boosted hydrogen evolution activity from Sr doped ZnO/CNTs nanocomposite as visible light driven photocatalyst

Ahmad, Irshad; Shukrullah, Shazia; Naz, Muhammad Yasin; Rasheed, Muhammad Athar; Ahmad, Mahmood; Ahmed, Ejaz; Akhtar, Muhammad Shoaib; Khalid, N.R.; Hussain, Abid; Khalid, Sadia

doi:10.1016/j.ijhydene.2021.05.164

Cited by 18 publications

(7 citation statements)

References 46 publications

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“…Moreover, the present photocatalytic H 2 generating ZnO-based candidates do not satisfy the targeted expectations owing to the technical barrier in simultaneously enhancing the photocatalytic performance and stability and reducing the high price affiliated with costly noble metal co-catalysts [16]. A fruitful strategy for addressing the issue is to integrate ZnO with a conductive noble metal co-catalyst such as Pt, Au, etc., to design strong and integrated hybrid photocatalytic frameworks with an inhibited recombination of excitons, rapid transmission of charge carriers and the availability of numerous catalytic sites to induce swift redox reactions to trigger the H 2 evolution process [17]. Despite obtaining much higher photocatalytic H 2 evolution performance due to the utilization of these noble metal co-catalysts, the overpriced cost and extensive scarcity greatly restrict their large-scale application.…”

Section: Introductionmentioning

confidence: 99%

Construction of 0D/2D Schottky Heterojunctions of ZnO and Ti3C2 Nanosheets with the Enriched Transfer of Interfacial Charges for Photocatalytic Hydrogen Evolution

et al. 2022

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The development of cost-effective co-catalysts of high photocatalytic activity and recyclability is still a challenge in the energy transformation domain. In this study, 0D/2D Schottky heterojunctions, consisting of 0D ZnO and 2D Ti3C2, were successfully synthesized by the electrostatic self-assembling of ZnO nanoparticles on Ti3C2 nanosheets. In constructing these heterojunctions, Ti3C2 nanosheets acted as a co-catalyst for enhancing the transfer of excitons and their separation to support the photocatalytic response of ZnO. The as-prepared ZnO/Ti3C2 composites demonstrate an abbreviated charge transit channel, a huge interfacial contact area and the interfacial electrons’ transport potential. The extended optical response and large reactive area of the ZnO/Ti3C2 composite promoted the formation of excitons and reactive sites on the photocatalyst’s surface. The ZnO/Ti3C2 Schottky heterojunction showed significantly high photocatalytic activity for hydrogen production from a water–ethanol solution under the light illumination in the visible region. The hydrogen evolution overoptimized the ZnO/Ti3C2 composition with 30 wt.% of Ti3C2, which was eight times higher than the pristine ZnO. These findings can be helpful in developing 0D/2D heterojunction systems for photocatalytic applications by utilizing Ti3C2 as a low-cost co-catalyst.

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Section: Introductionmentioning

confidence: 99%

Construction of 0D/2D Schottky Heterojunctions of ZnO and Ti3C2 Nanosheets with the Enriched Transfer of Interfacial Charges for Photocatalytic Hydrogen Evolution

et al. 2022

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“…The Sr-doped ZnO/CNTs with different doping concentrations of Sr were prepared through the sol−gel route and coated onto plasma-processed fabrics using the pad-dry method. 21 The self-cleaning tests with the nanocoated fabrics were performed in a methylene blue solution under sunlight. A DBD discharge of air was used to activate the fabric surface for an exposure time of 5 min.…”

Section: Discussionmentioning

confidence: 99%

“…This study aimed at plasma processing of cotton fabrics for the production of efficient Sr/ZnO/CNTs composite-coated textiles for self-cleaning application. The Sr-doped ZnO/CNTs with different doping concentrations of Sr were prepared through the sol–gel route and coated onto plasma-processed fabrics using the pad-dry method . The self-cleaning tests with the nanocoated fabrics were performed in a methylene blue solution under sunlight.…”

Section: Introductionmentioning

confidence: 99%

Dielectric Barrier Discharge Plasma Processing and Sr-Doped ZnO/CNT Photocatalyst Decoration of Cotton Fabrics for Self-Cleaning Application

Alsaiari,

Afzal,

Sultan

et al. 2023

ACS Omega

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Nonthermal plasma processing is a chemical-free and environmentally friendly technique to enhance the self-cleaning activity of nanoparticle-coated cotton fabrics. In this research, Sr-doped ZnO/ carbon nanotube (CNT) photocatalysts, namely, S 10 ZC 2 , S 15 ZC 2 , and S 20 ZC 2 with different Sr doping concentrations, were synthesized using the sol−gel method and coated on plasma-functionalized fabric to perform the self-cleaning tests. The fabrics were treated with dielectric barrier discharge plasma in an open environment for 3 min to achieve a stable coating of nanoparticles. The energy band gap of the photocatalyst decreased with an increase in the level of Sr doping. The band gap of S 10 ZC 2 , S 15 ZC 2 , and S 20 ZC 2 photocatalysts was estimated to be 2.85, 2.78, and 2.5 eV, respectively. The hexagonal wurtzite structure of ZnO was observed on the fabric surface composited with CNTs and Sr. The S 20 ZC 2 photocatalyst showed better homogeneity and photocatalytic response on the fabric when compared with S 10 ZC 2 -and S 15 ZC 2 -coated fabrics. The S 20 ZC 2 photocatalyst showed 89% dye degradation efficiency after 4 h of light exposure in methylene blue solution, followed by S 15 ZC 2 (84%) and S 10 ZC 2 (80%) photocatalysts.

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“…Therefore, a low-cost and eco-friendly strategy is important for current issues to fulfill the demand for energy utilization. H 2 can be utilized as a byproduct to generate power with the water reaction and has a much higher energy content of 122 kJ g –1 than hydrocarbons and is considered a promising energy source for the next generation . Many techniques have been used for hydrogen generation to meet the energy demand.…”

Section: Introductionmentioning

confidence: 99%

Testing of Sr-Doped ZnO/CNT Photocatalysts for Hydrogen Evolution from Water Splitting under Atmospheric Dielectric Barrier Plasma Exposure

et al. 2023

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Nonthermal plasma is a well-recognized environmentally advantageous method for producing green fuels. This work used different photocatalysts, including PZO, S x ZO, and S x ZC x for hydrogen production using an atmospheric argon coaxial dielectric barrier discharge (DBD)-based light source. The photocatalysts were produced using a sol–gel route. The DBD discharge column was filled with water, methanol, and the catalyst to run the reaction under argon plasma. The DBD reactor was operated with a 10 kV AC source to sustain plasma for water splitting. The light absorption study of the tested catalysts revealed a decrease in the band gap with an increase in the concentration of Sr and carbon nanotubes (CNTs) in the Sr/ZnO/CNTs series. The photocatalyst S25ZC2 demonstrated the lowest photoluminescence (PL) intensity, implying the most quenched recombination of charge carriers. The highest H2 evolution rate of 2760 μmol h–1 g–1 was possible with the S25ZC2 catalyst, and the lowest evolution rate of 56 μmol h–1 g–1 was observed with the PZO catalyst. The photocatalytic activity of S25ZC2 was initially high, which decreased slightly over time due to the deactivation of the photocatalyst. The photocatalytic activity decreased from 2760 to 1670 μmol h–1 g–1 at the end of the process.

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Boosted hydrogen evolution activity from Sr doped ZnO/CNTs nanocomposite as visible light driven photocatalyst

Cited by 18 publications

References 46 publications

Construction of 0D/2D Schottky Heterojunctions of ZnO and Ti3C2 Nanosheets with the Enriched Transfer of Interfacial Charges for Photocatalytic Hydrogen Evolution

Construction of 0D/2D Schottky Heterojunctions of ZnO and Ti3C2 Nanosheets with the Enriched Transfer of Interfacial Charges for Photocatalytic Hydrogen Evolution

Dielectric Barrier Discharge Plasma Processing and Sr-Doped ZnO/CNT Photocatalyst Decoration of Cotton Fabrics for Self-Cleaning Application

Testing of Sr-Doped ZnO/CNT Photocatalysts for Hydrogen Evolution from Water Splitting under Atmospheric Dielectric Barrier Plasma Exposure

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