CuO/ZnO/g-C3N4 heterostructures as efficient visible light-driven photocatalysts

Bajiri, Mohammed Abdullah; Hezam, Abdo; Namratha, K.; Viswanath, R. N.; Drmosh, Q.A.; Naik, H.S. Bhojya; Byrappa, K.

doi:10.1016/j.jece.2019.103412

Cited by 73 publications

(43 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CuO is a direct band gap p-type semiconductor photocatalyst with a band gap of 1.3–1.7 eV, which is mostly coupled with other semiconductors to form a heterojunction that can potentially inhibit the recombination of photogenerated electron–hole pairs. 27 , 28 In this work, the synergistic properties arising from the hybrid nanostructure composed of CuO–WO 3 composite coated on SGFs and the solid-state dewetting-driven surface dispersion of Ag nanoparticles are thoroughly investigated for an efficient visible-light-active photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Dewetted Silver Nanoparticle-Dispersed WO₃ Heterojunction Nanostructures on Glass Fibers for Efficient Visible-Light-Active Photocatalysis by Magnetron Sputtering

Loka

Lee

2021

ACS Omega

View full text Add to dashboard Cite

Fabrication of hybrid-heterojunction nanostructures comprising the Z-scheme and localized surface plasmon resonance is essential for enhancing the photocatalytic degradation of organic compounds to enable environmental remediation. This study focuses on the dispersion of dewetted Ag nanoparticles over the 3D network-like silica glass fibers (SGFs) coated with a Cu-doped WO 3 heterojunction system by a high-throughput and cost-effective method using magnetron sputtering, followed by solid-state dewetting. The influence of Cu doping on the crystal structure, growth direction, and morphology of WO 3 and the effect of localized surface diffusion-driven dewetted Ag nanoparticles on the photocatalytic performance were investigated. The Cu doping changed the optical band gap, and the 2Cu–WO 3 /SGF exhibited excellent photocatalytic activity. The surface dispersion of dewetted Ag nanoparticles over Cu–WO 3 /SGFs exhibited lowest photoluminescence intensity, indicating the effective separation of photogenerated electrons–holes, which led to highest efficiency (∼98%) in photocatalytic degradation of methylene blue among all the fibers with a degradation rate constant ( k = 0.0205 min –1 ) that was ∼18.6 times higher than that of pure WO 3 ( k = 0.0011 min –1 ). The findings of this study can provide insights for designing low-cost and efficient visible-light-active photocatalysts for organic dye degradation, enabling environmental remediation.

show abstract

Section: Introductionmentioning

confidence: 99%

Dewetted Silver Nanoparticle-Dispersed WO₃ Heterojunction Nanostructures on Glass Fibers for Efficient Visible-Light-Active Photocatalysis by Magnetron Sputtering

Loka

Lee

2021

ACS Omega

View full text Add to dashboard Cite

show abstract

“…If these e − and h + are somehow trapped on the surface of semiconductor and the electron‐hole recombination is prevented, both hydroxyl radicals and superoxide radicals are responsive. Therefore, the oxidation procedure can be accomplished, causing the disintegration of chemical contaminants 76,77 . With the existence of organic compounds, the process of photocatalysis for metal alumina (MAl 2 O 4 ) under sunlight can be specified as below:…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the oxidation procedure can be accomplished, causing the disintegration of chemical contaminants. 76,77 With the existence of organic compounds, the process of photocatalysis for metal alumina (MAl 2 O 4 ) under sunlight can be specified as below:…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Photocatalytic performance of Fe‐substituted ZnAl₂O₄ powders under sunlight irradiation on degradation of industrial dyes

Tangcharoen

T‐Thienprasert

Kongmark

2021

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Using the sol-gel auto combustion method with diethanolamine (DEA) as fuel, a sequence of iron-substituted zinc aluminates, ZnFe x Al 2-x O 4 powders, including variable Fe 3+ ion concentrations (0 ≤ x ≤ 2) were effectively prepared. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), the Brunauer-Emmett-Teller (BET) method, UV-visible diffuse reflectance spectroscopy (UV-DRS), and vibrating sample magnetometer (VSM) were

show abstract

“…With the existence of organic compounds, both hydroxyl radicals and superoxide radicals are responsive. Therefore, the oxidation procedure can be accomplished, causing the disintegration of chemical contaminants [13,59]. The process of photocatalysis for metal alumina under sunlight can be specified as below: When evaluating the pure samples of ZnAl2O4 against the modified samples, a substantial disparity was noted for the Eg values, which was identified as impacting the potential for sunlight absorption.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Synthesis and characterization of magnetic recyclable Fe-substituted zinc aluminate photocatalysts with enhanced sunlight-driven degradation of industrial dyes

Tangcharoen¹,

T‐Thienprasert²,

Kongmark³

2020

Preprint

View full text Add to dashboard Cite

Using the sol-gel auto combustion approach with diethanolamine (DEA) as fuel, a sequence of iron-substituted zinc aluminates, ZnFexAl2−xO4 powders, including variable Fe3+ ion concentrations (0 ≤ x ≤ 2) were effectively created. XRD, FT-IR, SEM, EDS, BET, UV-DRS, and VSM were employed to examine the structures, chemical bonds, morphologies, composition, surface area, and optical properties as well as the magnetic behavior of the collected samples. A single-phase spinel structure was gained for the calcined aluminate powders with different interplanar spacing and crystallite sizes, as revealed by the classification results. The bandgap energy (Eg) of adapted aluminates was in the range of 2.08–3.14 eV, identified as being much lower compared to the pure sample (5.60 eV). Thus, Fe3+-substituted ZnAl2O4 samples could be successfully photoexcited using both ultraviolet and visible light, as suggested by the results. Examination of how the four main pollutant types decay when irradiated by sunlight was carried out to assess the samples and establish photocatalytic activity. These contaminants included phenol rhodamine B (RhB), heteropolyaromatic methylene blue (MB), azoic methyl orange (MO) and methyl red (MR). The performance of photocatalytic degradation reached 98% after 150 minutes for all optimal samples of organic dyes. Besides, each of the altered photocatalysts could be recycled and displayed high stability. The S-shaped curve of ferrimagnetism can result from in those samples as found by the magnetic measurements, though pure ZnAl2O4 displays diamagnetic characteristics. The adapted samples show intense improvement in the remanent magnetization (Mr) when compared to pure ZnAl2O4, signifying that magnetic photocatalyst recovery by applying an external magnetic field is easy. Thus, these results offer a convincing sign that ZnAl2O4 powders replaced by Fe3+ could provide the ability to aid in the ecologically-friendly collection of solar energy.

show abstract

CuO/ZnO/g-C3N4 heterostructures as efficient visible light-driven photocatalysts

Cited by 73 publications

References 31 publications

Dewetted Silver Nanoparticle-Dispersed WO₃ Heterojunction Nanostructures on Glass Fibers for Efficient Visible-Light-Active Photocatalysis by Magnetron Sputtering

Dewetted Silver Nanoparticle-Dispersed WO₃ Heterojunction Nanostructures on Glass Fibers for Efficient Visible-Light-Active Photocatalysis by Magnetron Sputtering

Photocatalytic performance of Fe‐substituted ZnAl₂O₄ powders under sunlight irradiation on degradation of industrial dyes

Synthesis and characterization of magnetic recyclable Fe-substituted zinc aluminate photocatalysts with enhanced sunlight-driven degradation of industrial dyes

Contact Info

Product

Resources

About

CuO/ZnO/g-C3N4 heterostructures as efficient visible light-driven photocatalysts

Cited by 73 publications

References 31 publications

Dewetted Silver Nanoparticle-Dispersed WO3 Heterojunction Nanostructures on Glass Fibers for Efficient Visible-Light-Active Photocatalysis by Magnetron Sputtering

Dewetted Silver Nanoparticle-Dispersed WO3 Heterojunction Nanostructures on Glass Fibers for Efficient Visible-Light-Active Photocatalysis by Magnetron Sputtering

Photocatalytic performance of Fe‐substituted ZnAl2O4 powders under sunlight irradiation on degradation of industrial dyes

Synthesis and characterization of magnetic recyclable Fe-substituted zinc aluminate photocatalysts with enhanced sunlight-driven degradation of industrial dyes

Contact Info

Product

Resources

About

Dewetted Silver Nanoparticle-Dispersed WO₃ Heterojunction Nanostructures on Glass Fibers for Efficient Visible-Light-Active Photocatalysis by Magnetron Sputtering

Dewetted Silver Nanoparticle-Dispersed WO₃ Heterojunction Nanostructures on Glass Fibers for Efficient Visible-Light-Active Photocatalysis by Magnetron Sputtering

Photocatalytic performance of Fe‐substituted ZnAl₂O₄ powders under sunlight irradiation on degradation of industrial dyes