Browsing by Author "Byrappa K."
Now showing items 1-8 of 8
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CeO2 Nanostructures Enriched with Oxygen Vacancies for Photocatalytic CO2 Reduction
Hezam A.; Namratha K.; Drmosh Q.A.; Ponnamma D.; Wang J.; Prasad S.; Ahamed M.; Cheng C.; Byrappa K.... more authors ... less authors ( American Chemical Society , 2020 , Article)Synthesizing nanomaterials at the expense of solar energy and the associated energy generation have utmost significance as far as environmental sustainability is concerned. Here, sunlight-assisted combustion synthesis of ... -
Direct Z-Scheme Cs2O-Bi2O3-ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts
Hezam A.; Namratha K.; Ponnamma D.; Drmosh Q.A.; Saeed A.M.N.; Cheng C.; Byrappa K.... more authors ... less authors ( American Chemical Society , 2018 , Article)Limited light absorption, inefficient electron-hole separation, and unsuitable positions of conduction band bottom and/or valence band top are three major critical issues associated with high-efficiency photocatalytic water ... -
Direct Z-scheme Cs2O-Bi2O3-ZnO heterostructures for photocatalytic overall water splitting
Hezam A.; Namratha K.; Drmosh Q.A.; Ponnamma D.; Nagi Saeed A.M.; Ganesh V.; Neppolian B.; Byrappa K.... more authors ... less authors ( Royal Society of Chemistry , 2018 , Article)In this work, a direct Z-scheme Cs2O-Bi2O3-ZnO heterostructure without any electron mediator is fabricated by a simple solution combustion route. Cs2O is chosen as a sensitizer to expand the light absorption range, and in ... -
Heterogeneous growth mechanism of ZnO nanostructures and the effects of their morphology on optical and photocatalytic properties
Hezam, A.; Namratha, K.; Drmosh, Q.A.; Chandrashekar, B.N.; Sadasivuni, Kishor Kumar; Yamani, Z.H.; Cheng, C.; Byrappa, K.... more authors ... less authors ( Royal Society of Chemistry , 2017 , Article)Zinc oxide (ZnO) nanoflowers have huge potential for various applications. However, the growth mechanism of ZnO nanoflowers is still under debate despite various growth mechanisms having been proposed. The aim of this study ... -
Strategies to Enhance ZnO Photocatalyst's Performance for Water Treatment: A Comprehensive Review
Hezam A.; Drmosh Q.A.; Ponnamma D.; Bajiri M.A.; Qamar M.; Namratha K.; Zare M.; Nayan M.B.; Onaizi S.A.; Byrappa K.... more authors ... less authors ( John Wiley and Sons Inc , 2022 , Article Review)Despite the photocatalytic organic pollutant degradation using ZnO started in 1910?1911, many challenges are still ahead, and several critical issues have to be addressed. Large band gap, and short life-time of photogenerated ... -
Sunlight-Driven Combustion Synthesis of Defective Metal Oxide Nanostructures with Enhanced Photocatalytic Activity
Hezam A.; Namratha K.; Ponnamma D.; Drmosh Q.A.; Saeed A.M.N.; Sadasivuni K.K.; Byrappa K.... more authors ... less authors ( American Chemical Society , 2019 , Article)Synthesis of metal oxide nanostructures through combustion routes is a promising technique owing to its simplicity, rapidity, scalability, and cost-effectiveness. Herein, a sunlight-driven combustion approach is developed ... -
Surface modification and grafting of carbon fibers: A route to better interface
Raphael N.; Namratha K.; Chandrashekar B.N.; Sadasivuni K.K.; Ponnamma D.; Smitha A.S.; Krishnaveni S.; Cheng C.; Byrappa K.... more authors ... less authors ( Elsevier Ltd , 2018 , Article)This review is an audit of various Carbon fibers (CF) surface modification techniques that have been attempted and which produced results with an enhancement in the interfacial characteristics of CFRP systems. An introduction ... -
Surface Plasmonic Resonance and Z-Scheme Charge Transport Synergy in Three-Dimensional Flower-like Ag-CeO2-ZnO Heterostructures for Highly Improved Photocatalytic CO2Reduction
Mahyoub S.A.; Hezam A.; Qaraah F.A.; Namratha K.; Nayan M.B.; Drmosh Q.A.; Ponnamma D.; Byrappa K.... more authors ... less authors ( American Chemical Society , 2021 , Article)The design and engineering of plasmonic metal nanocomposite photocatalysts offer an operative approach for highly efficient CO2 photoreduction. Herein, the authors report a plasmonic 3D flower-like (3DF) Ag-CeO2-ZnO ...