Article
Engineering, Electrical & Electronic
Anu Katiyar, Nishant Kumar, R. K. Shukla, Anchal Srivastava
Summary: ZnO nanorods are grown along the c-axis using a sonicated sol-gel immersion method at a lower temperature, where the seed-layer precursor molarity and immersion time significantly impact the structural and morphological properties of the nanorods. These hexagonal nanorods exhibit green emission and persistent photoconductivity, which can be partially quenched through annealing. Annealing also helps improve transmittance and tunes the band gap value of bulk ZnO.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Environmental
Chandra Bhan, Animes Kumar Golder
Summary: In this study, hierarchical 2D vertically aligned nanostructures (VANs) of ZnO were synthesized using a bioinspired method for electrocatalytic sensing. The ZnO-VANs showed excellent performance in electrochemical sensing.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
J. Ridwan, J. Yunas, A. A. Umar, A. A. Mohd Raub, A. A. Hamzah, J. Kazmi, A. B. D. Nandiyanto, R. E. Pawinanto, I. Hamidah
Summary: This paper reports the synthesis and characterization of Cu-doped ZnO nanorods with enhanced photocatalytic activity in degrading industrial wastewater contaminations. The Cu doping affects the physical dimension of the rod structure and the optical properties of the ZnO nanorods. Photocatalytic degradation test results show that the highest methylene blue reduction of 97% is obtained using ZnO nanorods doped with 4 mol% Cu under 30 W UV exposure. The developed photocatalyst system could improve human health and environmental quality.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2022)
Article
Materials Science, Ceramics
Juan Agustin Badan, Guillermo Jauregui, Elena Navarrete-Astorga, Rodrigo Henriquez, Francisco Martin Jimenez, Daniel Ariosa, Enrique A. Dalchiele
Summary: The effect of solid-state thermal dewetting (SSD) parameters on the Ag NPs decorated ZnO NRs arrays was investigated, showing that bandgap tuning and light manipulation at the nanoscale can be achieved by controlling the size of Ag nanoparticles. Additionally, the surface plasmonic effect caused by silver nanoparticles attached to ZnO NRs arrays enhances room temperature photoluminescence (PL) emission and suppresses the visible light emission.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Sabrina Roguai, Abdelkader Djelloul
Summary: In this study, gold (Au) films were deposited onto vertically aligned carbon nanotubes (CNTs) using the DC magnetron sputtering method to create supercapacitor electrodes. The resulting Au@CNTs had a porous nanostructure morphology with a high apparent surface area. The porous Au/CNTs electrodes showed a good areal capacitance compared to traditional Au-based electrodes (25.6 mF cm-2 at 5 mV/s) and excellent cycling stability (90% retention after 10,000 cycles) in a 0.5 M H2SO4 aqueous solution. This research demonstrates the advantageous use of CNTs in fabricating porous Au deposits for improved electrochemical energy storage. Furthermore, these porous structures can serve as templates for other materials in electrochemical energy storage.
Article
Materials Science, Multidisciplinary
Yongjun Kim, P. R. Deshmukh, Weon Gyu Shin
Summary: Vertically aligned ZnO nanowires developed on Pt coated Si-wafer exhibit high photocurrent density and water splitting efficiency under light illumination, making them promising photoelectrodes for solar energy applications.
Article
Environmental Sciences
P. Senthil Kumar, B. S. Sreeja, K. Krishna Kumar, G. Padmalaya
Summary: A primary study was conducted to develop an electrochemical sensor for detecting sulfamethoxazole (SMX) in surface water, aiming to address the contamination issue in the ecosystem. The developed method utilizing a GO/ZnO nanocomposite modified electrode showed excellent sensing performance, with optimized parameters for effective detection of SMX in phosphate buffer solution.
Article
Chemistry, Physical
Abhisek Chakraborty, Andrea Orsini, Jyoti Prakash Kar, Francesco Gatta, Usman Khan, Christian Falconi
Summary: This study demonstrates a method of naturally promoting ultra-efficient, convection-assisted, seed-less synthesis of ZnO nanowires by heating the substrate with an adjacent temperature-controlled surface.
Article
Materials Science, Multidisciplinary
S. Kaya, O. Ozturk, L. Arda
Summary: Zn1-xNdxO (x = 0.00, 0.01, 0.03, 0.05, 0.07) nanorods (NRs) are grown vertically using a hydrothermal method with Nd3+ ions successfully substituted into the crystal lattice of ZnO. Significant changes are observed in the morphological and optical properties of the Nd substituted ZnO NRs. The magnetic parameters are found to be independent of Nd concentration, while a correlation is found between the morphological properties and the H-c value of Nd substituted ZnO NRs.
CURRENT APPLIED PHYSICS
(2022)
Article
Biochemistry & Molecular Biology
Chrysanthi Gkili, Konstantinos Deligiannakis, Eirini Lappa, Chrysanthi Papoulia, Dimitra Sazou
Summary: This research investigates the simultaneous electrochemical growth of PANI and Ta2O5 on a Ta substrate, and characterizes the morphology, redox behavior, and pseudocapacitive properties of the resulting composite thin films. The study reveals unique properties of the Ta2O5-PANI composite film and its potential application as an energy storage device.
Article
Physics, Multidisciplinary
Asmaa Al-Rasheedi, M. Khammar, A. M. Abdel-Daiem, M. S. Aida, Mohamed Sh Abdel-wahab
Summary: This paper discusses the growth mechanisms of ZnO nanorods thin-films using the hydrothermal process. The seed layer preparation method alters the alignment of the nanorods, while the nature of the salt source affects the size of the nanorods.
Article
Chemistry, Multidisciplinary
Maheen Rahim, Sobia Yaseen, Rizwan Ullah
Summary: This study focuses on the fabrication of polyaniline (PANI) and PANI/bismuth-doped zinc oxide (PANI/Bi-ZnO) as electrode materials for high-efficiency supercapacitors. The synthesized materials exhibit improved structural, thermal, and morphological properties, making them suitable for supercapacitor electrodes. The PANI/Bi-ZnO composite shows higher charge storage capacity, energy density, and power density values compared to pure PANI.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Engineering, Electrical & Electronic
Yusuf Selim Ocak, Meryem Lamri Zeggar, Mustafa Fatih Genisel, Nilufer Uslu Uzun, Mohammed Salah Aida
Summary: Metal oxide nanostructures with high surface-to-volume ratios are ideal for gas sensor fabrication. By depositing ZnO thin films on vertically aligned silicon nanowires with varying etching times, sensitivity and specific reactive surface of CO2 sensors can be improved. The sensors show low response and recovery times compared to those reported in literature.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Gillsang Han, Minje Kang, Yoojae Jeong, Sangwook Lee, Insun Cho
Summary: A ternary-Zn2SnO4/binary-ZnO radially heterostructured nanowires array has been synthesized using a convenient thermal evaporation and post-annealing method, demonstrating superior charge-separation and -transport properties.
Article
Chemistry, Multidisciplinary
Yu-Hsuan Lin, Chandrasekar Sivakumar, Babu Balraj, Gowtham Murugesan, Senthil Kumar Nagarajan, Mon-Shu Ho
Summary: The non-enzymatic glucose sensing response of pure and Ag-decorated vertically aligned ZnO nanorods grown on Si substrates was investigated. Ag@ZnO NR glucose sensor device exhibited a better sensing ability with excellent stability over time than pure ZnO NRs. The Ag@ZnO NR glucose sensor device recorded 2792 mu A/(mM center dot cm(2)) sensitivity with a lowest detection limit of 1.29 mu M.
Article
Engineering, Environmental
Preeti Tewatia, Vijay Kumar, Sharmistha Samota, Sonal Singhal, Anupama Kaushik
Summary: This study developed a sensing and annihilation system for arsenite ions in water using wheat-straw cellulose, which exhibited strong affinity and high adsorption capacity for As(III) ions, with low detection limit and excellent reusability and stability. BF@CFs showed promising potential as a dual functional sensor and adsorbent for arsenic removal in water bodies in northern India.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Kavita Sharma, Manpreet Kaur, Gaurav Rattan, Anupama Kaushik
Summary: This study utilized cellulose nanofibers derived from rice straw to immobilize acetylcholinesterase (AChE) and demonstrated their effective use as a fluorescent sensor and biocatalyst for sensing and degradation of chlorpyrifos (CPF). The immobilized AChE nanofibers showed excellent selectivity, stability, and activity, making them an efficient catalyst for CPF degradation.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Multidisciplinary
Sachin Kumar, Preeti Tewatia, Sharmistha Samota, Gaurav Rattan, Anupama Kaushik
Summary: Castor oil based polyurethanes were reinforced with cellulose nanofibers derived from hemp and graphene nanosheets to yield hybrid nanocomposites. The addition of equal amounts of CNFs and GNS significantly improved the properties of the nanocomposites. The interconnecting network of GNS and CNFs enhanced the mechanical properties and hydrophobicity of the nanocomposites.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Review
Engineering, Electrical & Electronic
Sharmistha Samota, Reetu Rani, Suvankar Chakraverty, Anupama Kaushik
Summary: This review provides an overview of conventional methods and recent advances in biosensing techniques for bacterial detection, with a focus on FET based biosensors. The application of different nanomaterials in fabricating Bio-FETs for bacterial detection is discussed, along with the potential use of new materials such as oxide perovskites.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Materials Science, Ceramics
Paramdeep Kaur, Jyoti, Sneha Singh, Diksha Aggarwal, Nitansh, Vinod Kumar, Kulbhushan Tikoo, Anupama Kaushik, Sonal Singhal
Summary: A novel hexagonal ferrite-based core-shell-shell nanostructures (SrFe@Dop@M, M = Cr, Mn, Fe, Co, Ni, Cu and Zn) were designed for dual application of simultaneous electrochemical detection and photocatalytic degradation. The synthesized nanostructures were characterized by PXRD, FE-SEM, HR-TEM, and XPS techniques. The best photocatalytic performance was observed in SrFe@Dop@Mn, which had the lowest energy band gap value and highest electron transfer rate. The modified SrFe@Dop@Mn glassy carbon electrode was successfully used as an electrochemical sensor for the detection of levofloxacin in waste water samples.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Sharmistha Samota, Preeti Tewatia, Reetu Rani, Suvankar Chakraverty, Anupama Kaushik
Summary: In this study, nitrogen and sulfur doped carbon dots (N, S-CDs) were synthesized using a hydrothermal method with a wild plant, Typha angustata Bory (Patera), as the precursor. The N, S-CDs exhibited an unprecedented quantum yield of 83% and were used to develop a highly sensitive sensor for fluorescence assay of mercury ions and cysteine in aqueous medium. The sensor showed ultra-low limits of detection and exceptional reusability, indicating its extraordinary efficacy. The synthesized sensor has the potential to be a facile, fast, and reliable platform for the detection of Hg2+ ions and cysteine for environmental remediation.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Environmental Sciences
Salma S. Syed, Liyamol Jacob, G. Bharath, Mohammed Abu Haija, Anupama Kaushik, Fawzi Banat
Summary: Ultra-small gold nanoparticles were successfully synthesized for the efficient degradation of 4-nitrophenol in wastewater by absorbing visible and near-infrared light. The gold photocathode exhibited high electrochemical activity and successfully reduced 4-nitrophenol under VIS-NIR light irradiation. The photocathode completely reduced 4-nitrophenol in wastewater within 35 minutes. This study demonstrates the effectiveness of the photoelectrochemical process in degrading organic compounds in wastewater.
ENVIRONMENTAL RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Preeti Tewatia, Vishwas Kaushik, Manjot Singh Jyoti, Deepak Pathania, Sonal Singhal, Anupama Kaushik
Summary: To address heavy-metal ions in wastewater, researchers synthesized boron nitride quantum dots (BNQDs) in-situ on rice straw derived cellulose nanofibers (CNFs) as a substrate. The composite system, BNQD@CNFs, had strong hydrophilic-hydrophobic interactions and a large surface area of luminescent fibers. BNQD@CNFs showed affinity for Hg(II) and successfully adsorbed it due to strong electrostatic interactions and the presence of polar B-N bonds. This composite also exhibited high potential in wastewater remediation, with a high adsorption capacity and recyclability.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Green & Sustainable Science & Technology
Vijay Kumar, Gaurav Rattan, Preeti Tewatia, Manpreet Kaur, Deepak Pathania, Sonal Singhal, Anupama Kaushik
Summary: Cellulose nanofibers (CNFs) derived from rice straw were used to develop effective fluorescent sensors for simultaneous detection of chromium Cr(VI) and mercury Hg(II) ions, addressing the problems of rice straw burning and heavy metal pollution. Modified CNFs with L-histidine (CHIS) exhibited significant fluorescence quenching in response to Cr(VI) and Hg(II) ions, with detection limits of 2.236 nM and 3.97 nM, respectively. XPS studies revealed strong interactions of CHIS with the metal ions, leading to fluorescence quenching. The sensor showed high selectivity, stability, and usability up to 4 cycles.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Kavita Sharma, Preeti Tewatia, Manpreet Kaur, Deepak Pathania, Fawzi Banat, Gaurav Rattan, Sonal Singhal, Anupama Kaushik
Summary: An easily recyclable biocatalyst called Lac@CDI-MCNFs was synthesized by immobilizing laccase on rice straw-derived carbonyldiimidazole mediated magnetized cellulose nanofibers (MCNFs). Lac@CDI-MCNFs were used for bioremediation of cefixime antibiotic (CT), carbofuran pesticide (CF) and safranin O dye (SO) in wastewater through oxidation-reduction reactions. The Lac@CDI-MCNFs showed high stability and could be reused for up to 25 cycles with only a 20% decline in effectiveness. They effectively degraded 98.2% CT and 96.8% CF within 20 hours, as well as completely degrading SO in just 7 hours.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Green & Sustainable Science & Technology
Jaspreet Kaur, Paramdeep Kaur, Twinkle Garg, Vinod Kumar, Kulbhushan Tikoo, Bhupender Singh, Christian Paulik, Anupama Kaushik, Sonal Singhal, Sonal Singhal
Summary: Highly fluorescent carbon dots (TCDs) were synthesized using Tulsi Leaves and anchored on NiFe2O4 (NF) nanoparticles via a hydrothermal method, producing smart magnetically retrievable fluorescent nanohybrids (NFTCDs) for the first time. NFTCDs were capable of accurately detecting and efficiently degrading hazardous contaminants in aqueous samples through a photo-Fenton degradation mechanism. The NFTCDs-based platform demonstrated reliable quantification of toxic substances in real samples, with recyclability up to four cycles. This work presents a novel NFTCDs nanohybrid as an intelligent platform for synchronized monitoring and removal of deleterious contaminants, ensuring human safety.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Engineering, Environmental
Twinkle Garg, Jaspreet Kaur, Vinod Kumar, Kulbhushan Tikoo, Anupama Kaushik, Sonal Singhal
Summary: Industrial development is a global issue due to the disposal of pollutants in water bodies. Many researchers use photocatalysis for effective removal of pollutants from wastewater. However, the design of materials that can remove and detect pollutants is still challenging.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Manpreet Kaur, Vijay Kumar, Kavita Sharma, Sumant Saini, Mukta Sharma, Christian Paulik, Hideaki Yoshitake, Gaurav Rattan, Anupama Kaushik
Summary: Hemp stalks in northern India can be used as a good source of cellulose nanofibers (CNFs) for various applications. A study has successfully attached disulfide linkages on hemp-derived CNFs, resulting in CNF-S-S-CNF with high selectivity for mercury ions and affinity for safranin O. Response surface methodology was applied to optimize the process parameters, and various kinetic and isotherm models were used to understand the adsorption mechanism. The results demonstrated the strong interaction between CNF-S-S-CNF and Hg(II) ions, indicating its potential in wastewater remediation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Jaspreet Kaur, Kavita Sharma, Anupama Kaushik
Summary: A novel eco-friendly aerogel was prepared from waste hemp stalk derived cellulose, which showed excellent potential in sustained release of fertilizers. The aerogel exhibited super-absorbent behavior and sustained release of encapsulated nutrients, making it an effective approach for agriculture waste management and sustained agriculture applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Materials Science, Multidisciplinary
Twinkle Garg, Anupama Nitansh, Ankita Goyal, Anupama Kaushik, Sonal Singhal
Summary: Semiconductor photocatalysis, particularly g-C3N4 based Z-scheme heterojunctions, has gained attention for its potential in addressing pollution and energy demands. The unique electronic structure and stability of g-C3N4 make it suitable for visible-light driven redox reactions, despite its high recombination rate of charge carriers. This review summarizes the charge transfer mechanism and synthesis strategies of g-C3N4 heterostructures, while highlighting the accomplishments in various applications such as pollutant degradation, water splitting, and reduction of carbon dioxide and heavy metal ions.
MATERIALS RESEARCH BULLETIN
(2023)
