Photocatalytic hydrogen production by ternary heterojunction composites of silver nanoparticles doped FCNT-TiO2

Reddy, N. Ramesh; Bharagav, U.; Shankar, M.V.; Reddy, P. Mohan; Reddy, Kakarla Raghava; Shetti, Nagaraj P.; Alonso‐Marroquín, Fernando; Kumari, M. Mamatha; Aminabhavi, Tejraj M.; Joo, Sang Woo

doi:10.1016/j.jenvman.2021.112130

Cited by 31 publications

(8 citation statements)

References 55 publications

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“…These results could be attributed to the combined absorption of both components upon hybridization, which accounts for improving the overall light utilization and hence the photocatalytic activity. [56][57][58][59][60][61][62] With an excess amount of CN i.e., CNZ-20 and CNZ-50, the corresponding absorbance get reduced due to that CN could shield the light from penetrating the entire structure of CNZ HPs. From the Mott-Schottky plots of CN and Z (Figure 6c,d), the extrapolated CB positions are −1.2 and −0.78 V (vs Ag/AgCl, pH = 7) that correspond to −0.56 and −0.14 V (vs NHE, pH = 0), respectively.…”

Section: Uv-vis Light Absorption Spectra and Mott-schottky Curvesmentioning

confidence: 99%

EPR Investigation on Electron Transfer of 2D/3D g‐C₃N₄/ZnO S‐Scheme Heterojunction for Enhanced CO₂ Photoreduction

Sayed

Zhu

Kuang

et al. 2021

Advanced Sustainable Systems

138

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Photocatalytic conversion of CO2 into useful products is a promising technology from environmental and economic viewpoints. However, the efficiency of current photocatalytic materials is still unsatisfactory. In this work, a robust S‐scheme heterojunction composed of 3D ZnO hollow spheres wrapped by 2D g‐C3N4 layers is fabricated. The electrostatic attraction between both components not only facilitates the exfoliation of g‐C3N4 layers but also strengthens the photocatalyst framework. The prepared g‐C3N4/ZnO photocatalyst afforded an enhanced CH4 production rate, which is ≈40 and 7 times higher than those of pure ZnO and g‐C3N4, respectively. The improved activity is attributed to the extended light absorption and suppressed charge carrier recombination. Moreover, apart from traditional techniques, electron paramagnetic resonance (EPR) is used to probe charge movement in the fabricated S‐scheme heterojunction. An observable shift of the relevant EPR peak is noticed after the construction of g‐C3N4/ZnO heterostructure, indicating the electron transfer process. This study sheds light on S‐scheme heterojunctions as efficient candidates for CO2 photocatalytic conversion.

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Section: Uv-vis Light Absorption Spectra and Mott-schottky Curvesmentioning

confidence: 99%

EPR Investigation on Electron Transfer of 2D/3D g‐C₃N₄/ZnO S‐Scheme Heterojunction for Enhanced CO₂ Photoreduction

Sayed

Zhu

Kuang

et al. 2021

Advanced Sustainable Systems

138

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“…To overcome this constraint, TiO 2 has been subjected to decorating with metal nanoparticles, anionic or cationic doping, or coupled with semiconductors of narrow bandgap (Pearson et al 2012;Kisch 2013;Milosevic et al 2017). The synthesis of TiO 2 nanoparticles and coupling with cations, composites, and metal oxides to increase sensitization in the visible range is an emerging topic of study in photocatalysis (Yu et al 2019c;Reddy et al 2021). Titanium anodization is a simple process that creates controlled nanotubes, chemical resistance, a large surface area, and a high loading capacity.…”

Section: Complex Metal Oxidesmentioning

confidence: 99%

Recent advances in photocatalytic remediation of emerging organic pollutants using semiconducting metal oxides: an overview

Prakruthi

Ujwal

Yashas

et al. 2021

Environ Sci Pollut Res

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Many untreated and partly treated wastewater from the home and commercial resources is being discharged into the aquatic environment these days, which contains numerous unknown and complex natural and inorganic compounds. These compounds tend to persist, initiating severe environmental problems, which affect human health. Conventionally, physicochemical treatment methods were adopted to remove such complex organic chemicals, but they suffer from critical limitations. Over time, photocatalysis, an advanced oxidation process, has gained its position for its efficient and fair performance against emerging organic pollutant decontamination. Typically, photocatalysis is a green technology to decompose organics under UV/visible light at ambient conditions. Semiconducting nanometal oxides have emerged as pioneering photocatalysts because of large active surface sites, flexible oxidation states, various morphologies, and easy preparation. The current review presents an overview of emerging organic pollutants and their effects, advanced oxidation processes, photocatalytic mechanism, types of photocatalysts, photocatalyst support materials, and methods for improving photodegradation efficiency on the degradation of complex emerging organic pollutants. In addition, the recent reports of metal-oxide-driven photocatalytic remediation of emerging organic pollutants are presented in brief. This review is anticipated to reach a broader scientific community to understand the first principles of photocatalysis and review the recent advancements in this field.

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“…Of all the energy sources, hydrogen production is the most convenient alternative to acquire clean energy with zero carbon emissions − since it can deliver an energy yield nearly 2.75 times higher than hydrocarbon fuels that have a high energy content (122 kJ/g). , Water splitting for H 2 production using carbon-based materials has been widely explored over the years owing to economical and practical suitabilities of this approach. ,, The recently developed lithium-ion batteries, lithium–sulfur batteries, redox flow batteries, and supercapacitors have been promising electrochemical energy storage devices (EESDs) owing to their eco-friendliness, dependability, and high power densities. − These devices are responsible for storing and releasing electricity via the electrochemical reaction in a reversible manner, which is quite effective in the domain of electric vehicles, portable electronics, and aerospace applications . EESDs are made up of several components such as an electrode, separator, electrolyte, and packaging, which involve different electrochemical reactions. , The potentials of EESDs are primarily dependent on the attributes of the electrode materials as these can determine the energy density, power density, and rate capacity …”

Section: Introductionmentioning

confidence: 99%

Versatile Graphitized Carbon Nanofibers in Energy Applications

Sharma

Basu

Shetti

et al. 2022

ACS Sustainable Chem. Eng.

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Graphitized carbon nanofibers (CNFs) are the allotropic forms of carbon that offer exceptional electrical conductivity, high aspect ratio, large surface-to-volume ratio, flexibility, mechanical robustness, and structural stability. These properties render CNFs as useful materials in energy applications, including water electrocatalysis and electrochemical energy storage devices (EESDs). Graphitized CNFs manifest huge versatility in EESDs and have been employed as electrode materials, as supports for other electrode materials, and conductive additives. This perspective summarizes the production methods, structural aspects, and energy applications of graphitized CNFs. Different design strategies have been employed to produce CNFs with diverse and distinct morphologies and structures. Their fabrication methods, along with precursors and dopants or cocatalysts, impact the overall structural, functional, and topographical properties. Recent developments on the state-of-the-art interests of graphitic CNFs in lithium-ion batteries (LIBs), lithium−sulfur (Li−S) batteries, vanadium redox flow batteries (VRFBs), supercapacitors, and water splitting have explored the many possibilities in energy sectors. The assembly and functioning of CNFs in water splitting and EESDs as well as primary challenges are discussed in this perspective.

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Photocatalytic hydrogen production by ternary heterojunction composites of silver nanoparticles doped FCNT-TiO2

Cited by 31 publications

References 55 publications

EPR Investigation on Electron Transfer of 2D/3D g‐C₃N₄/ZnO S‐Scheme Heterojunction for Enhanced CO₂ Photoreduction

EPR Investigation on Electron Transfer of 2D/3D g‐C₃N₄/ZnO S‐Scheme Heterojunction for Enhanced CO₂ Photoreduction

Recent advances in photocatalytic remediation of emerging organic pollutants using semiconducting metal oxides: an overview

Versatile Graphitized Carbon Nanofibers in Energy Applications

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Photocatalytic hydrogen production by ternary heterojunction composites of silver nanoparticles doped FCNT-TiO2

Cited by 31 publications

References 55 publications

EPR Investigation on Electron Transfer of 2D/3D g‐C3N4/ZnO S‐Scheme Heterojunction for Enhanced CO2 Photoreduction

EPR Investigation on Electron Transfer of 2D/3D g‐C3N4/ZnO S‐Scheme Heterojunction for Enhanced CO2 Photoreduction

Recent advances in photocatalytic remediation of emerging organic pollutants using semiconducting metal oxides: an overview

Versatile Graphitized Carbon Nanofibers in Energy Applications

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Product

Resources

About

EPR Investigation on Electron Transfer of 2D/3D g‐C₃N₄/ZnO S‐Scheme Heterojunction for Enhanced CO₂ Photoreduction

EPR Investigation on Electron Transfer of 2D/3D g‐C₃N₄/ZnO S‐Scheme Heterojunction for Enhanced CO₂ Photoreduction