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Dive into the research topics where Jagpreet Singh is active.

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Featured researches published by Jagpreet Singh.


Journal of Materials Science: Materials in Electronics | 2017

Hydrothermal synthesis of zinc stannate nanoparticles spectroscopic investigation

Suresh Sagadevan; Jagpreet Singh; Kaushik Pal; Zaira Zaman Chowdhury; Md. Enamul Hoque

This paper presents the study conducted on the synthesis and the investigations of Zinc stannate nanoparticles. Hydrothermal method was used for the synthesis. Characterizations for the products obtained were done with the help of powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV–Vis absorption spectroscopy. The X-ray powder diffraction result was used to characterize the morphology and also it confirmed the well crystalline wurtzite structure. Typical electron microscopic investigations of SEM and TEM were used to study the morphology and the particle size. The formation of Zn2SnO4 nanoparticles and their particle size were confirmed by the TEM analysis. The optical properties were analyzed using UV–Vis absorption and PL spectrum. The FT-IR spectrum confirmed the presence of Zn2SnO4 nanoparticles. The dielectric properties, e.g. dielectric constant, dielectric loss, and AC conductivity of the Zn2SnO4 nanoparticles, were measured and studied as a function of frequency and temperature. Those nanoparticles exhibit quantum size effects of the optical absorption spectrum. The influence of reaction conditions on the growth of Zn2SnO4 nanoparticles demonstrates that high precursor concentration and high reaction temperature (≥200 °C) is a favorable growth in the formation of zinc stannate.


Particulate Science and Technology | 2017

Enhanced catalytic reduction of 4-nitrophenol and congo red dye By silver nanoparticles prepared from Azadirachta indica leaf extract under direct sunlight exposure

Jagpreet Singh; Preeti Kukkar; Heena Sammi; Mohit Rawat; Gurjinder Singh; Deepak Kukkar

ABSTRACT The manuscript reports an efficient approach for the synthesis of biogenic silver (Ag) nanoparticles from Azadirachta indica leaf extract-mediated reduction of silver nitrate under solar radiation at mild temperature conditions for nanoparticles (NPs) preparation. Spectroscopic and electron microscopic characterization studies revealed the formation of stable and monodisperse Ag NPs with sharp absorption band at 438 nm and average diameter of 10–15 nm. Catalytic potential of the NPs was descriptively investigated for the reduction of 4-nitrophenol to 4-aminophenol in alkaline medium. Apparent rate constant () values were determined to be 0.014, 0.0238, 0.0338, 0.063, and 0.0794 at 5, 10, 15, 20, 40, and 50 µL Ag NPs volume, respectively, thereby depicting linear relationship between the variables under study. Catalytic reduction of Congo red dye was achieved within 2 h, thus validating the efficacy of Ag NPs as a photocatalyst. The NPs also exhibited linear increment in antibacterial activity on cultured Escherichia coli plates with increasing volumes. These catalytic capabilities firmly advocate the applications of Ag NPs in purification of polluted water by the removal of toxic and contaminant materials and harmful/pathogenic bacteria.


Archive | 2018

Plant leaves mediated synthesis of semiconductor ZnO nanoparticles and its application for seed germination

Manpreet Singh; Jagpreet Singh; Deepanjali Sharma; Bhupinder Kaur; Mohit Rawat

Green synthesis of nanoparticles is a simple, eco-friendly and cost-effective approach which might cover the way for researchers across the globe to explore the potential of different herbs to synthesize nanoparticles. In this regard, the present work focus on the green synthesis of zinc oxide nanoparticles usingan aqueous extract of Azadirachtaindicaleaves. The extract was used as the biological reduction agent for synthesizing zinc oxide nanoparticles from zinc acetate. Synthesis conditions were optimized for maximal and narrow size range synthesis of zinc oxide nanoparticles. The resultant nanopowder was characterized using various analytical techniques, such as UV-Visible spectroscopy, Fourier Transform Infrared spectroscopy (FTIR), X-ray Diffraction Spectroscopy (XRD), Field Emission Scanning Electron Microscopy(FESEM) withEnergy Dispersive X-ray Spectroscopy (EDX). The characterization resultsconfirm thecrystalline nature of green synthesized Zinc Oxide nanoparticles (ZnO-NPs) with spherical morphology and the averagesize of ∼50 nm. UV-Visible absorbance peak was centered near 363 nm for the reduction of zinc acetate to the ZnO nanoparticles. It was observed that the linear increment of the root and shoot length of mung bean (Vigna radiata) seeds with the concentration of ZnO NPs.Green synthesis of nanoparticles is a simple, eco-friendly and cost-effective approach which might cover the way for researchers across the globe to explore the potential of different herbs to synthesize nanoparticles. In this regard, the present work focus on the green synthesis of zinc oxide nanoparticles usingan aqueous extract of Azadirachtaindicaleaves. The extract was used as the biological reduction agent for synthesizing zinc oxide nanoparticles from zinc acetate. Synthesis conditions were optimized for maximal and narrow size range synthesis of zinc oxide nanoparticles. The resultant nanopowder was characterized using various analytical techniques, such as UV-Visible spectroscopy, Fourier Transform Infrared spectroscopy (FTIR), X-ray Diffraction Spectroscopy (XRD), Field Emission Scanning Electron Microscopy(FESEM) withEnergy Dispersive X-ray Spectroscopy (EDX). The characterization resultsconfirm thecrystalline nature of green synthesized Zinc Oxide nanoparticles (ZnO-NPs) with spherical morphol...


Journal of Nanomedicine Research | 2018

A uncanny potential of plants for metal nanoparticles synthesis

Mohit Rawat; Jagpreet Singh; Harman Kaur

In this era, metal nanoparticles have captivated researchers because of their impending applications in numerous fields such as biomedical, catalysis, electronics etc.1–4 The properties of nanoparticles can be tuned by their size, synthesis process, reaction parameters, which make them the special candidate for every field. Generally, these nanoparticles are synthesized by two methods top down and bottom up. The top-down suggests the nanoparticles preparation by lithographic techniques, ball milling, etching, sputtering, etc. The most effective approach for the synthesis of nanoparticles is the bottom-up methods, in which nanoparticles are grown from simpler molecules and size or shape of nanoparticles can be controlled or modulated by changing the concentration of chemicals and reaction condition (temperature, pH etc.).5


Green Processing and Synthesis | 2018

Biogenic ZnO nanoparticles: a study of blueshift of optical band gap and photocatalytic degradation of reactive yellow 186 dye under direct sunlight

Jagpreet Singh; Sukhmeen Kaur; Gaganpreet Kaur; Soumen Basu; Mohit Rawat

Abstract Synthesis of nanoparticles (NPs) using plant extracts has been suggested as an environmentally friendly alternative to chemical synthesis of semiconductor NPs. In the present study, ZnO NPs were synthesized by a simple and cost-effective method using Coriandrum sativum leaf extract and zinc acetate as precursors. The as-synthesized ZnO NPs were characterized by UV-visible spectroscopy, transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDX) analysis. The results confirmed the formation of ZnO NPs with a wurtzite structure, spherical shape and average particle size of 24 nm. The photocatalytic degradation of reactive yellow 186 (RY 186) dye was carried out under direct sunlight irradiation and its degradation efficiency and apparent rate constant (K’app) of reaction were calculated to be 93.38%, and 0.0019 min−1, respectively. The optical band gap value of the as-synthesized ZnO NPs was found to be 3.4 eV, which indicates the presence of blueshift. Owing to the presence of blueshift and a wide band gap of synthesized biogenic ZnO NPs, the overall absorption of sunlight irradiation will be enhanced, which leads to higher degradation efficiency of the dye. The current study thus highlights the optical band gap properties of biogenic ZnO NPs and their significance as a heterogeneous catalyst for the purification of polluted water.


Frontiers of Materials Science | 2018

Graphene: from synthesis to engineering to biosensor applications

Jagpreet Singh; Aditi Rathi; Mohit Rawat; M. Gupta

Graphene is a fascinating material of recent origin whose first isolation was being made possible through micromechanical cleavage of a graphite crystal. Owing to its fascinating properties, graphene has garnered significant attention in the research community for multiple applications. A number of methods have been employed for the synthesis of single-layer and multi-layer graphene. The extraordinary properties of graphene such as its Hall effect at room temperature, high surface area, tunable bandgap, high charge mobility and excellent electrical, conducting and thermal properties allow for the development of sensors of various types and also opened the doors for its use in nanoelectronics, supercapacitors and batteries. Biological aspects of graphene have also been investigated with particular emphasis on its toxicity and drug delivery. In this review, many of the salient aspects of graphene, such as from synthesis to its applications, primarily focusing on sensor applications which are of current interest, are covered.


Materials Science-poland | 2017

Synthesis of Cu and Ce co-doped ZnO nanoparticles: crystallographic, optical, molecular, morphological and magnetic studies

Mohit Rawat; Jasmeet Singh; Jagpreet Singh; Chamkaur Singh; Amritpal Singh; Deepak Kukkar; Sanjeev Kumar

Abstract In the present research work, crystallographic, optical, molecular, morphological and magnetic properties of Zn1-xCuxO (ZnCu) and Zn1-x-yCeyCuxO (ZnCeCu) nanoparticles have been investigated. Polyvinyl alcohol (PVA) coated ZnCu and ZnCeCu nanoparticles have been synthesized by chemical sol-gel method and thoroughly studied using various characterization techniques. X-ray diffraction pattern indicates the wurtzite structure of the synthesized ZnCu and ZnCeCu particles. Transmission electron microscopy analysis shows that the synthesized ZnCu and ZnCeCu particles are of spherical shape, having average sizes of 27 nm and 23 nm, respectively. The incorporation of Cu and Ce in the ZnO lattice has been confirmed through Fourier transform infrared spectroscopy. Room temperature photoluminescence spectra of the ZnO doped with Cu and co-doped Ce display two emission bands, predominant ultra-violet near-band edge emission at 409.9 nm (3 eV) and a weak green-yellow emission at 432.65 nm (2.27 eV). Room temperature magnetic study confirms the diamagnetic behavior of ZnCu and ferromagnetic behavior of ZnCeCu.


Journal of Natural Product and Plant Resources | 2011

Anticancer plants: A Review

Raj; eep Kaur; Jagpreet Singh; Gag; eep Singh; Harpreet Kaur


Journal of environmental chemical engineering | 2018

Green synthesis of silver nanoparticles using sun dried tulsi leaves and its catalytic application for 4-Nitrophenol reduction

Jagpreet Singh; Akansha Mehta; Mohit Rawat; Soumen Basu


Journal of Materials Science: Materials in Electronics | 2018

Fructose modified synthesis of ZnO nanoparticles and its application for removal of industrial pollutants from water

Gurjinder Singh; Jagpreet Singh; Sukhwinder Singh Jolly; Rohit Rawat; Deepak Kukkar; Sanjeev Kumar; Soumen Basu; Mohit Rawat

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Mohit Rawat

Sri Guru Granth Sahib World University

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Deepak Kukkar

Sri Guru Granth Sahib World University

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Sanjeev Kumar

Sri Guru Granth Sahib World University

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Sukhmeen Kaur

Sri Guru Granth Sahib World University

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Gurjinder Singh

Sri Guru Granth Sahib World University

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Harjot Kaur

Sri Guru Granth Sahib World University

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Preeti Kukkar

Sri Guru Granth Sahib World University

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