Gaurav Sharma

Indian Institute of Technology Delhi | IIT Delhi · Nanoscale Research Facility

This review presents a brief scenario about the development of cathodes, anodes, and electrolytes for the next generation of Li-ion batteries (LIBs) and supercapacitors for future energy technologies. Specific capacity and power density are two prime requirements for energy storage devices, mainly decided by the microstructure and compositions of e...

We synthesized Au nanoparticles (Au-NPs) encapsulated zinc oxide (ZnO:Au) nanosponges by the fraternization of ZnO nanoflowers with HCl (0–30 mM) concentrated colloidal Au-NPs at room temperature. The crystallite size (D) of mesoporous ZnO:Au decreased from 44 nm to 22 nm and the strain (τ) increased from 2.5 × 10⁻³ to 4.7 × 10⁻³ as the HCl concent...

We synthesized yttrium-doped CNT-ZnO (CNT-YZO) nanoparticles (NPs) and nanoflowers (NFs) from the hydrothermal method at 130 °C. The effect of Y³⁺-concentrations in nanostructured CNT-YZO was determined in terms of the photocatalytic degradation of methylene blue (MB). Microstructural analysis showed the hexagonal cubic structure of ZnO regardless...

Over the past century, the world's population has increased greatly. The growth in the population has increased the global food demand, so the food sector has increased its production. As a result of the increased production and consumption, a huge amount of agro‐food waste is being generated yearly. Rice husk, wheat straw, sugarcane bagasse, corn...

Agricultural waste ashes are used as resource materials to synthesize new glass and glass-ceramics. The as-prepared materials are characterized using various techniques for their structural and dielectric properties to check their suitability in microelectronic applications. Sugarcane leaves ash exhibits higher content of alkali metal oxides than r...

In the present study, the glass slurry coating to a high-strength low-alloy steel (HSLA) substrate was investigated for corrosion resistance material. The crystallographic phases, degree of crystallinity, lattice parameters, and potential changes due to the coating process, and microstructural changes such as visual inspection of the surface, revea...

In the present study, Sr2+ and Ca2+ ions doped lanthanum niobate (LaNbO4) samples are synthesized using the solid-state reaction method. The effect of sintering temperature on physical, optical and electrical properties are investigated of the pristine and Sr2+ /Ca2+ doped LaNbO4 samples using by characterization facilities such as X-ray diffractio...

Composition 55SiO2-30B2O3-(x)Li2O-(15-x)Y2O3 (x = 00, 05, 10, 15) are synthesized using melt-quench technique at higher temperature (1550 °C). As-synthesized samples are sintered to form the crystalline phases at different temperature range, i.e., 800 °C and 850 °C. The density (2.40–1.57 g/cc) and molecular weight (87.79–58.40 g/mol) of samples ar...

In this study, ZnO nanorods were successfully synthesized by using the one-step mechanical-assisted thermal decomposition method. The crystalline nature and morphology of the as-synthesized sample were confirmed using X-ray diffraction (XRD) and Field emission-scanning electron microscopy (FESEM). The optical bandgap (E g) of obtained ZnO nanorods...

In this review, a brief perspective of MXene (since 2011) with recent research for new and advanced applications for wastewater treatments through various approaches have been discussed. Current information’s about MXenes are summarized to fully understand their nature, promising properties and reduce the challenges that have opened the new era of...

In this study, magnetic bimetallic spinel ferrites, MFe2O4 (M = Cu, Ni, Zn, and Cd) were synthesized by a feasible sol–gel self-combustion method. The single-phase cubic spinel structure and microstructural changes were confirmed by X-ray diffraction (XRD) analysis and field emission scanning electron microscopy (FESEM). The spinel structure’s func...

Existing wastewater treatment systems face a number of significant challenges, including aging infrastructure, climate change, emerging pollutants, and higher consumption of energy due to population growth. In order to solve these issues, comprehensive and long-term water management strategies are required. This study describes a pathogen-free wate...

In this study, a novel 2D/2D heterostructure of MXene and V2O5 was synthesized using facile hydrothermal approach for the efficient removal of crystal violet (CV), a textile dye from contaminated water. Here, the catalytic performance of pristine MXene was prominently boosted with the introduction of ball milled V2O5 as an electron generating ag...

Due to their controlled and manipulative optical, electronic, mechanical, molecular, and thermal properties, 2D MXenes-based sensors are emerging as high-performance analytical tools for detecting various types of organic or pharmaceutical contaminants, including dyes such as Methylene blue (MB), methyl orange (MO) and metallic ions such as lead (P...

In this study novel mesoporous nanocomposite of 2D WS2 nanosheets modified with ZIF-9 (WZF) has been synthesized by hydrothermal method followed by two step process. To the best of our knowledge, this is the first study for the adsorption of MG and CV dyes using highly mesoporous WZF nanocomposite

Due to their controlled and manipulative optical, electronic, mechanical, molecular, and thermal properties, 2D MXenes-based sensors are emerging as high-performance analytical tools for detecting various types of organic or pharmaceutical contaminants, including dyes such as Methylene blue (MB), methyl orange (MO) and metallic ions such as lead (P...

The 3D (3-dimensional) printing is an emerging technology for several medical applications such as bone scaffolds, surgery, organ printing, drug delivery, in vitro tissues modelling and pharmaceutical in the healthcare sectors. In this review, extensively contribution for growth of emerging latest technologies as well as design and development of d...

Biogenic calcium silicate glasses were synthesized from the biomass wastes by melt-quench technique at a high temperature of 1550 •C. XRD pattern showed the preferred orientation along the c-axis (002) regardless of the concentration of eggshell powder. The optical bandgap (Eg) decreased from 3.96 to 3.74 eV, and the refractive index (n) increased...

Elaeocarpus ganitrus (L.) commonly known as Rudraksha has been stated for its potential medicinal benefits in traditional system of medicine due to its electromagnetic activity, although scientific evidences about its electrical properties are missing. The present study aims to investigate the electrical properties of three types (Three Mukhi,...

This paper reports the alkali field strength effect on structural, optical, dielectric, and conducting properties of calcium borosilicate glasses. Glass compositions 60SiO2–5B2O3–15CaO-20R2O (where R = Li, Na, K) are synthesized by melt-quench technique. The density shows an increasing trend with the increasing atomic weight of substituted alkali m...

Biogenic silicate glass-ceramics were synthesized from the rice husk and eggshell powder (ESP) using the melt-quench method. The crystallite size (0.351–0.370 nm) increased and the bandgap (3.43–3.15 eV) decreased as the ESP concentration increased from 10 to 20 wt%. The higher dielectric constant at lower frequency range is attributed to the accum...

We deposited Al-doped zinc oxide (AZO) thin films on PTFE flexible substrate by RF sputtering with respect to the power in the range 125-155 W. XRD-pattern showed the preferred c-axis (002) orientation regardless the rf-power, which confirmed the hexagonal wurtzite crystal structure. The dislocation density (δ), and strain (ε) of AZO thin films wer...

Silica nanoparticles (n-SiO2), graphene nanosheets (n-Gr) and graphene oxide nanosheets (n-GO) were synthe�sized from the cost-effective biomass rice husk ash (RHA) by the simple chemical process. The crystallite size and micro-strain of all samples were calculated from XRD-peak profile analysis to be 1.5 - 5.4 nm and 8.11 - 28.64 MPa, respective...

Glasses and glass-ceramics were prepared from agro-food waste ashes via melt-quench technique and converted into glass ceramics by heat treatment at 900 °C for 10 h. Dielectric properties of the glass-ceramics were studied in the frequency range 100 Hz-1 MHz at discrete temperature (100–600 °C). Density was found to increase in glass ceramics in co...

Various glasses are synthesized by melt quench technique. The addition of transition metal (TM) oxides into glasses paves the light on their crystallization and sinterability. The formation of different crystalline phases and their microstructures significantly influenced the conduction mechanism in these glass-ceramics. ZnO seemed to act as glass...

In this study, glasses and glass-ceramics are prepared using agro-food wastes instead of conventional mineral oxides like SiO2, CaO, and Na2O, etc. X-ray diffraction (XRD) technique is used to check the amorphous and crystalline nature of the as-quenched and heat-treated samples, respectively. X-ray photoelectron spectroscopy (XPS) and energy dispe...

Calcium silicate glasses are synthesized using agro-food waste like rice husk ash and eggshell powder as the resource materials via melt-quench technique. As-quenched samples are heat-treated at 900 °C for 10 h to form the crystalline phases, which confirmed using XRD technique. The presence of the higher amount of eggshell powder is influenced the...

In this study, silicate glass-ceramic is synthesized from wheat straw ash (WSA) using melt-quench technique. Xray diffraction is done to confirm the nature of the as-quenched samples. Inductive coupled plasma-mass spectroscopy (ICP-MS) and energy dispersive spectroscopy (EDS) are performed to evaluate the exact chemical composition of the as-prepar...

I got Best oral presentation Award in Kufri, Himachal Pradesh

Present glasses are synthesized by the melt-quench method. The ashes of rice husk and sugarcane leaves are taken to synthesize the present samples. The eggshell powder is used to modify the glass-network and reduced the melting temperature of rice husk ash (RHA) and sugarcane leaves ash (SCLA). The as-quenched samples are characterized using differ...

Waste materials are used as the resource materials to make bio-active glasses. Further study also discussed in this article.

Glasses with composition 55SiO2-10K2O-(35-x)CaO-xMgO (x = 5, 10, 15 up to 35) were prepared via conventional melt-quench technique. The glasses were converted to glass–ceramics by controlled heat-treatment at 850 °C. Higher content of MgO instead of CaO prevents the devitrification of the glasses. The in-vitro bioactivity of the glasses/glass–ceram...

Composition SiO2-CaO-Na2O-MgO-K2O-Al2O3 are prepared by melt and quench technique. To study the effect of modifiers on various structural and optical properties The density of the prepared samples is calculated by Archimedes' principle. X-ray diffraction technique is used to check the amorphous nature of the samples. The optical band gap is also me...

Agricultural waste ashes are used to synthesize glasses and glass-ceramics by melt-quench technique. The as-prepared as well as heat-treated samples are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), dilatometer, UV/Visible and photoluminescence spectroscopy. It is observed that, the higher content (> 50 wt%) of rice...

The Glasses are prepared by agro-food waste, and check their optical and structural properties using the XRD and UV-Visible spectroscopy.

The agricultural waste utilized as a source of natural silica. We got prize from AcErs and JEST for this innovative work.

It is explored the optical properties as well as structural properties of borosilicate glasses.