Article
Materials Science, Multidisciplinary
Tej Singh, Gustavo da Silva Gehlen, Ney Francisco Ferreira, Liu Yesukai de Barros, Germano Lasch, Jean Carlos Poletto, Sharafat Ali, Patric Daniel Neis
Summary: This study developed a sustainable material for automotive braking applications using a natural fiber, Grewia Optiva, from the Himalayan region. The addition of 7.5 wt% Grewia Optiva fiber significantly improved friction performance, reduced specific wear rate, and enhanced fade-recovery performance in brake friction composite materials.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Composites
Naresh Kumar, Vikas Mehta, Sushil Kumar, Jaswinder Singh Grewal, Safarat Ali, Kamal Kashyap, Nitin Kumar, Seema Devi
Summary: This research article introduces a novel composite material made of natural fiber and PAN fiber, aiming to address the issue of harmful materials in current composite materials. The study emphasizes the lack of research on PAN and natural fiber based hybrid composites. Therefore, Grewia optiva with good mechanical properties and PAN fiber with good tribological properties were used to develop the composites. The developed composites demonstrated promising physical, mechanical, and tribological properties.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Pramod Prabhakar Bijlwan, Lalta Prasad, Anshul Sharma, Sanjeev Kumar
Summary: This research paper investigates the hardness and tribological performance of novel Grewia optiva/Basalt fiber reinforced hybrid polymer composites. Different configurations of hybrid composites, including woven and chopped fiber reinforced composites, are studied. The results show that B6/GO6 composite has the lowest specific wear rate and highest hardness. Taguchi optimization technique is used to analyze the wear experimental results and recommend L-25 partial orthogonal array for the woven fiber reinforced composites. For hardness testing, L-9 orthogonal array is suggested based on four control factors and three levels.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Agricultural Engineering
Deepak Gupta, Arun Kumar Chaudhary, Vinay Kumar Singh, Deepak Verma, Kheng Lim Goh, Mohit Sharma
Summary: This study explores the novel idea of utilizing bhimal fiber and agro-industrial wastes to improve the economy of farmers and the state. The incorporation of different industrial waste improves the mechanical properties of the biocomposites, with nano-TiO2 being the most effective filler.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Polymer Science
Kishor Kalauni, S. J. Pawar
Summary: In this study, Grewia Optiva fiber (GOF) was reinforced with epoxy and hybrid resins. The effect of fiber surface treatment on the mechanical properties of GOF was examined, and the results showed that GOF treated with 5% NaOH exhibited superior tensile strength. Moreover, the addition of fiber content increased water absorption, with the maximum observed in 15 wt% GOF reinforced hybrid resin composites. The results also indicated that 15 wt% continuous GOF reinforcement with epoxy resin showed the highest tensile strength and flexural strength.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Materials Science, Textiles
Kiran K. Murasing, Munesh Kumar, Amit Kumar
Summary: This study evaluated the effect of altitude on the physical properties of Grewia optiva fiber, showing that mechanical strength of the fiber is greatest at higher altitudes. Fiber denier, breaking strength, and elongation at break are highest at higher altitudes, lowest at lower altitudes, while tenacity is highest at middle altitudes.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Polymer Science
Sonika Chauhan, Prakash Chandra Gope
Summary: This study optimized the fiber length, fiber weight percentage, and fiber orientation for epoxy-based Grewia Optiva fiber reinforced composite using the Taguchi method. The results showed that the optimum conditions were 30 wt% fiber, 45mm fiber length, and fiber oriented normal to the loading axis. The mode-I fracture toughness at the optimum condition was 2.122 +/- 0.094 MPa root m.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Textiles
Abhilash Karakoti, J. Ronald Aseer, Priya K. Dasan, M. Rajesh
Summary: Bio-based composites are gaining popularity in the green materials industry due to their contribution to environmental protection. In this study, cellulose microfibers were extracted from natural fibers using the steam explosion technique, and their thermal properties were improved through chemical treatment. The resulting cellulose microfiber reinforced composites showed enhanced mechanical properties when fabricated using the compression molding method.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Chemistry, Physical
N. M. Basfer, S. F. Mansour, M. K. Ahmed
Summary: The research focuses on the degradation of pollutants, including organic dyes, using the photocatalysis technique. Modified hydroxyapatite with vanadate ions has been fabricated and studied for its structure and optical properties, showing potential applications in water treatment and biomedical fields.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Materials Science, Textiles
Sandeep Kumar, V. K. Patel, K. K. S. Mer, Brijesh Gangil, Tej Singh, Gusztav Fekete
Summary: The study found that composites with 6% hybrid Grewia optiva/Bauhinia vahlii fibers had the highest physical and mechanical properties. The optimal combination of control factors for achieving the lowest wear rate was determined using the Taguchi method.
JOURNAL OF NATURAL FIBERS
(2021)
Article
Materials Science, Textiles
Lalit Ranakoti, Pawan Kumar Rakesh, Brijesh Gangil
Summary: The use of agricultural waste in composite materials can reduce material costs and carbon footprints. Results showed that the addition of Tasar silk waste improved the mechanical properties and wear resistance of the composites.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Engineering, Environmental
Irshad Ibran Shahib, Jerosha Ifthikar, Daniel T. Oyekunle, Zouhair Elkhlifi, Ali Jawad, Jia Wang, Wenli Lei, Zhuqi Chen
Summary: This study investigated the influence of different activating reagents on the physicochemical properties of sludge-derived biochar. The surface-active sites and their nature of the biochar were significantly tuned based on chemical modification. Among the modified biochars, NaOH-modified biochar exhibited the highest adsorption capacity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Gianluca Viscusi, Elena Lamberti, Giuliana Gorrasi
Summary: This study investigated the use of hemp fibers modified with graphite oxide for removing methylene blue from aqueous solutions, finding that the adsorption process reached equilibrium within 30 minutes and the adsorption capacity increased with contact time. Temperature was found to have an impact on the adsorption capacity, with thermodynamic parameters suggesting the process is spontaneous. Additionally, a mathematical algorithm was applied to predict the response surface model, optimizing the process parameters for maximum removal capacity.
Article
Engineering, Environmental
Jyoti Rana, Gyanendra Goindi, Navneet Kaur, Shwetank Krishna, Abhijit Kakati
Summary: The aim of this research is to treat wastewater containing methylene blue dye using a modified cellulose acetate-based composite material. The CA-AA-AM composite showed a maximum adsorption capacity of 68.9 mg/g or 89% removal rate under optimal conditions. Analysis of the composite's properties revealed that the interactions between cellulose acetate and monomers resulted in the addition of functional groups that were responsible for active adsorption sites. The results demonstrate that the CA-AA-AM composite is an effective and recyclable adsorbent for removing methylene blue from aqueous solutions.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Materials Science, Ceramics
Hao Huy Nguyena, Gobinda Gyawali, Bhupendra Joshi
Summary: Mn-doped TiO2 nanomaterials were synthesized using the sol-microwave process, and the photocatalytic performance was significantly improved due to increased light absorption ability and efficient separation of photoelectron-hole pairs.
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2022)
Article
Energy & Fuels
Shamshad Khan, M. Naushad, Jibran Iqbal, Chinna Bathula, Gaurav Sharma
Summary: Biofuel derived from microalgae has become an environmentally friendly alternative to conventional fossil fuels, but there are still technical and economic challenges in mass production and harvesting. This review discusses the difficulties in establishing an integrated system for large-scale microalgal production and harvesting, as well as the advancements in harvesting methods and opportunities for genetic engineering.
Article
Physics, Applied
Arvind Kumar, Swati, Manish Kumar, Vikrant Chaudhary, Gaurav Sharma, V. P. Singh, Rishi P. Singh
Summary: In this study, the structural, optoelectronic, and magnetic properties of the Y2FeSi Heusler alloy were investigated using first principle calculations. The results show that the compound exhibits interesting electronic, magnetic, and optical properties, suggesting its potential application in optical and spintronic devices.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2022)
Article
Chemistry, Physical
Gaurav Sharma, Amit Kumar, Mu Naushad, Pooja Dhiman, Bharti Thakur, Alberto Garcia-Penas, Florian J. Stadler
Summary: In this study, a novel nanocomposite hydrogel with a C3N4/BiOI heterostructure supported on a gum acacia-crosslinked-poly(acrylamide) hydrogel was designed. The potential application of this nanocomposite hydrogel in mitigating crystal violet dye (CVD) in aqueous solutions was explored. Structural and functional analysis of the nanocomposite hydrogel was conducted, and various reaction parameters were optimized. The C3N4/BiOI heterostructure in the nanocomposite hydrogel exhibited a Z-scheme as the potential photocatalytic mechanism for CVD photodegradation, which was validated through COD and HR-MS analysis of the degradation pathways.
Review
Polymer Science
Soundouss Maliki, Gaurav Sharma, Amit Kumar, Maria Moral-Zamorano, Omid Moradi, Juan Baselga, Florian J. Stadler, Alberto Garcia-Penas
Summary: New developments require innovative ecofriendly materials with biocompatibility, biodegradability, and versatility. Chitosan, the second most abundant material in the world, has unique properties that can be used for various purposes, promoting the design and development of sustainable materials. For example, it can be used as an alternative for food packaging or in sustainable agriculture. Chitosan can also reduce pollution in other industrial processes. This review highlights important advances in the sustainable use of chitosan for promoting circular economy.
Article
Chemistry, Physical
Sunil Kumar Sharma, Amit Kumar, Gaurav Sharma, Mu Naushad, Mohd Ubaidullah, Alberto Garcia-Penas
Summary: S-scheme heterojunctions with superior redox capability have emerged as promising materials for cleaning up contaminated environments. In this study, g-C3N4/NiFe2O4 heterojunction photocatalyst was synthesized and achieved excellent degradation performance of Cephalexin under visible light. The catalyst exhibited strong photocatalytic stability and easy recovery process due to its magnetic characteristic. This research provides new insights for the construction of magnetic photocatalysts based on g-C3N4 and paves a path for designing S-scheme heterojunctions with great performance in environmental remediation applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Environmental
Gaurav Sharma, Amit Kumar, P. Senthil Kumar, Abdullah Alodhayb, Zeid A. ALOthman, Pooja Dhiman, Florian J. Stadler
Summary: A highly visible-light active nanocomposite was designed and tested for the degradation of toxic pharmaceutical effluents in water. The addition of carbon quantum dots enhanced the light-harvesting ability and successfully degraded ofloxacin antibiotic. The study also established a degradation mechanism and identified the major reactive radical species involved.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Pooja Dhiman, Garima Rana, Elmuez A. Dawi, Amit Kumar, Gaurav Sharma, Arun Kumar, Jayati Sharma
Summary: In this paper, a moderate band gap Nd-substituted Ni-Zn ferrite is synthesized as a nano photo catalyst. The Nd substitution significantly affects the crystallite size, shape, band gap, and magnetic characteristics of the ferrite. The Nd-doped catalyst shows enhanced degradation efficiency of methylene blue dye under solar light irradiation. The photocatalytic activity is attributed to the presence of oxygen vacancies and the mixed valence state of Ni, Fe, and Nd.
Article
Biochemistry & Molecular Biology
Pooja Dhiman, Garima Rana, Amit Kumar, Elmuez A. Dawi, Gaurav Sharma
Summary: Antibiotic water contamination is a growing environmental problem, requiring water treatment for reduction and elimination. Photocatalysts have received significant attention for their role in resolving this issue by degrading non-biodegradable organic matter in polluted water. In this study, rare earth doped ZnO nanoparticles were successfully synthesized and characterized for their structural, optical, and magnetic properties. The dye degradation efficiency of these nanoparticles was also evaluated, with Dy doped ZnO nanoparticles showing the highest degradation efficiency for tetracycline, Malachite green, and Crystal violet dyes.
Article
Polymer Science
Gaurav Sharma, Alberto Garcia-Penas, Yaksha Verma, Amit Kumar, Pooja Dhiman, Florian J. Stadler
Summary: This study successfully designed shape-oriented hydrogel nanospheres using a facile ultrasonication-supported crosslinked copolymerization technique. The chitosan-cl-poly(MMA) hydrogel nanospheres were characterized and found to have optimal rhodamine B dye adsorption capacity at pH 5. Nanohydrogel concentration also affected the adsorption capacity and percentage.
Article
Materials Science, Composites
Ge-Ge Zheng, Xin Lin, Zhen-Xing Wen, Yu-Hao Ding, Rui-Hui Yun, Gaurav Sharma, Amit Kumar, Florian J. Stadler
Summary: Photocatalytic degradation is crucial for wastewater treatment, and efficient degradation relies on photocatalytic systems with excellent light absorption, carrier separation efficiency, and surface-active sites. S-type heterojunctions, especially the BiFeO3/ZnIn2S4 heterojunction, show remarkable potential for efficient degradation. This study focuses on enhancing the photocatalytic degradation performance by introducing sulfur vacancy defects and morphology modifications to ternary indium metal sulfide and bismuth ferrite nanofibers. The optimized 30% BiFeO3/ZnIn2S4 heterojunction exhibits superior photocatalytic performance, with high sulfur vacancy concentration and enhanced electron transport efficiency. It achieved a remarkable 99% degradation of Evans blue within 45 minutes and a significant 68% degradation of ciprofloxacin within 90 minutes. These results provide a feasible approach for developing photocatalysts to address water pollution issues under practical conditions.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Engineering, Chemical
Ayad A. H. Faisal, Hayder M. Rashid, Gaurav Sharma, Nadhir Al-Ansari, B. Saleh
Summary: This study establishes a mathematical model and solves it using the method of separation of variables to describe the migration of contaminant metal ions through a PRB column. The results indicate that an increase in metal ions velocity decreases their capture, while an increase in barrier depth prolongs the longevity of PRB.
DESALINATION AND WATER TREATMENT
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Robin Garg, Paul Dania, Gaurav Sharma, Armagan Dascurcu, Soumya Gupta, Harish Krishnaswamy, Arun Natarajan
Summary: This paper presents a dual-band 28 GHz and 39 GHz MIMO RX front-end with beam-space frequency-domain multiplexing (FDM) technology, enabling concurrent amplitude/phase weighted signal combining across four elements and 28 GHz/39 GHz bands. The integrated circuit features low power consumption and compact size in 65nm CMOS.
2022 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS SYMPOSIUM (RFIC)
(2022)
Article
Multidisciplinary Sciences
Subhash Malik, Shubham Verma, Arun Gupta, Gaurav Sharma, Shakuntla Singla
Summary: The present paper discusses the performability evaluation of a coal fired thermal power plant's steam generation system using the Markov method. The economizer subsystem is identified as the most critical and should be given the highest maintenance priority, while the boiler drum subsystem is the least crucial and should be given the lowest priority.
Review
Chemistry, Multidisciplinary
Pooja Dhiman, Dipanshi Goyal, Garima Rana, Amit Kumar, Gaurav Sharma, Linxin, Gagan Kumar
Summary: New single-atom catalysts, particularly single-atom carbon-based nano-photocatalysts, show promise for environmental remediation due to their ultra-high efficiency, environmental compatibility, structural/chemical stability, and effective usage of active metal centres. These catalysts have sparked interest among researchers for their outstanding structure and features, such as enormous activity, selectivity, maximal atom usage, and improved intrinsic catalytic activity. Carbon and carbon-based nanomaterials provide an excellent substrate for stabilizing single-atom catalysts, thanks to their low-cost production, excellent conductivity, high surface area, functionality, and tunable properties. However, there is limited work on utilizing carbon supported single-atom catalysts for the high-performance removal/degradation of a broad range of noxious organic and inorganic contaminants from water.
JOURNAL OF NANOSTRUCTURE IN CHEMISTRY
(2022)
Article
Engineering, Environmental
Ackmez Mudhoo, Gaurav Sharma, Dinesh Mohan, Charles U. Pittman, Mika Sillanpaa
Summary: This article discusses the contradictions associated with the use of biodegradable adsorbents for water purification, and proposes research directions for the development of intelligent biodegradable adsorbents. It emphasizes the need for precise tuning of biodegradability, the development of intelligent functionality and structure modulations, and the incorporation of protection-deprotection strategies in biodegradable adsorbents.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)