Om Prakash Pandey's research while affiliated with Thapar University and other places

Publications (23)

Article
Full-text available
The present work describes the effect of tempering (T4 and T6) processes on the dry sliding wear properties of ilmenite reinforced aluminum alloy (LM30) composites, prepared through stir casting route. In this process the composites were heated to 540 °C for 0.5–2 h followed by water quenching. Then the samples were first given (a) T4 treatment (na...
Article
Full-text available
In the present work, CdS heterostructures are successfully synthesized with Zn-doped and (Y, Zn)-co-doped CeO2 via co-precipitation route using different molar concentrations of sodium sulfide. The synthesized samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy to s...
Article
Wear properties of LM13 alloy based composites were studied by using boron carbide (B4C) and ilmenite particles (FeTiO3) separately as reinforcement. Different weight percentage of reinforcement (5 wt.%, 10 wt.%, and 15 wt.%) was added to base alloy through stir-casting. Comparison of B4C reinforced composites (LB composites) and FeTiO3 reinforced...
Article
Several optical applications demand for enhanced optical response of rare earth containing glasses. In the present investigation, modification in spectral features with the dispersion of gold nanoparticles in Dy³⁺ doped bismuth borosilicate glasses is reported. All the glass samples were prepared using conventional melt-quench technique. Prepared g...
Article
Full-text available
In this review, we summarize the latest research progress on Mo2C based materials for various electrochemical applications. It starts with discussing the different synthesis methods and the tactics for modifying the physicochemical characteristics of Mo2C. In addition, the variables that influence the morphology and electrochemical performance of M...
Article
In this investigation, ilmenite mineral reinforced Al–Si alloy matrix composite (AMC) has been developed. The wear behavior of the developed composites has been studied for their end application as break drum material to replace cast iron used in automobile industries. Ilmenite is one of the major sea beach mineral. AMC has been prepared through a...
Chapter
“We forget that the water cycle and the life cycle are one.” - J.Y. Cousteau Though the industrial revolution has made our life easy, it affected the natural water resources with tremendous discharge of waste products. To tackle these problems, several research groups have discovered advanced oxidation processes with a variety of materials (Pt, Au,...
Article
Seed germination is the primary stage of growth in a seed. A wealth of experiments exist in literature to support the existence of correlation between seed germination to the electric and magnetic fields. This becomes more important as researchers have suggested to develop technologies to build ecologically clean and environment-friendly solutions...
Preprint
Full-text available
Two different categories of bioactive glasses prepared from biomass using SiO 2 and P 2 O 5 as glass formers are reported in this study. These glasses are prepared by melt-quench technique. The glasses are evaluated in-vitro for their bioactivity assessment with the help of simulated body fluid (SBF). The formation of hydroxyapatite (HAp) above the...
Article
The present study investigates effect of heat treatment on wear and friction behaviour of sillimanite/LM30 aluminium matrix composites at elevated temperatures (50–300 °C). The composites were prepared using a stir-casting process. Composites were reinforced with 3–15 wt.% sillimanite particle sizes of fine (1–20 μm):coarse (75–106 μm) in the ratio...
Article
The present work describes the synthesis of alkali-free glasses utilizing the agricultural waste rice husk and eggshells. A series of glasses with basic composition SiO2–P2O5–MgO–CaO has been synthesized using the melt-quench technique, where P2O5 is partially replaced by MnO. These glasses are characterized to assess their in-vitro reactivity with...
Preprint
Full-text available
The current work has been undertaken to see the effect of Gr/Sn as a solid lubricant for the development of hybrid aluminum metal matrix composite (HAMCs). HAMCs were fabricated by reinforcing 10 wt. % (sillimanite + ilmenite) minerals with or without 1 wt. % Sn/Gr/both solid via stir casting technique. Optical microscopy revealed a homogenous dist...
Preprint
Full-text available
In 1955, it was first suggested that Hall effect can be employed for amplification purposes by using semiconductor material with very high mobility. While this idea was limited at that time, yet it was not entirely discarded expecting eventual progress. We revisit this idea and discuss it in the light of current literature. This manuscript kindles...
Conference Paper
Full-text available
In the present research, bio-synthesisation of silica nanoparticles has been carried out successfully. For this purpose, agriculture waste rice husk has been utilized. Among several types of agriculture waste, rice husk is considered to be cost-effective and easily accessible. In the present investigation, a simple chemical approach has been employ...
Article
The present work reports on the synthesis and biocompatibility of SiO 2-P 2 O 5-MgO-CaO-SrO glass system. The MgO was partially replaced by the SrO to check its influence on the bioactivity of the glass samples. The silica used for the development of glass samples was obtained from rice husk ash using acid-base precipitation technique. The structur...
Article
Full-text available
In the present work, silica extracted from the agricultural waste material; rice husk (RH) was utilized for the synthesis of biocompatible glass of general composition SiO2-P2O5-CaO-MgO-MoO3. In the synthesized glasses P2O5 (5%) and CaO (25%) was kept constant whereas MgO and MoO3 was varied from 10% to 20% and 0% to 5% respectively. The structural...
Article
Glasses containing noble metal nanoparticles (MNPs) are in demand for optical switching devices because of their large third-order nonlinear optical coefficients associated with the localized surface plasmon resonance (LSPR) of metal nanoparticles. While the MNPs can be chosen based on the operation wavelength as the geometry of the MNP governs the...
Article
Full-text available
The sugarcane baggage ash and chicken shells are the abundant by-products of agro-food waste materials. These waste materials have hazardous impact on environment and thus require proper utilization to get valuable products. The present report is a detailed study to use these materials to fabricate intense red light-emitting Eu-doped Ca2SiO4 (C2S)...
Article
Here, we report the role of different stabilizers (Eu 2 O 3 , EuF 3 and KSCN) in stabilizing gold nanoparticles (AuNPs) embedded in Bismuth-Borosilicate glasses. The prepared nanocomposites are characterized by X-ray diffraction (XRD), differential thermal analysis (DTA), UV-Visible transmission spectroscopy, field emission scanning electron micros...
Article
Full-text available
Present study report the influence of distribution of gold nanoparticles on optical properties of bismuth-borate glass. The glass with the composition 30Bi2O3:70B2O3 was first melted and in this glass matrix, 3 × 10¹¹ number of gold nanoparticles of 10 nm size were incorporated within the glass matrix using three different methods: drop casting met...
Article
Nonlinearity is one of the most important optical properties widely used in opto-electronic devices. In this work, the optical nonlinearity of a series of Bismuth Borosilicate glasses is compared. The glasses prepared through conventional melt-quench technique comprises of Dy2O3, gold nanoparticles (GNPs) and both Dy2O3 and GNPs. XRD is used to con...
Article
A series of europium and alkali metal ions (Li ⁺ , Na ⁺ and K ⁺ )co-doped Gd 2 O 3 phosphors were synthesized by the co-precipitation method. The Gd 2 O 3 phosphors were synthesized by calcination of the precursors at 800 ℃ for 4 h. The structural, morphological and optical properties of as-synthesized samples were characterized by X-ray diffractio...
Article
A series of Gd2-xO3:x% Eu (x = 0 to 10 mol%) were synthesized by hydrothermal method. The structural, morphological and optical properties of as-synthesized samples were studied by X-ray diffraction, field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray analysis (EDX), FT-IR spectroscopy, thermogravimetric analysis (TGA), di...

Citations

... Hardness was higher for thixocasted samples compared to die-casted ones, and T5 and T6 heat treatments further improved hardness. The influence of heat treatment on hypereutectic alloys produced by conventional casting was investigated in [8][9][10][11], while other researchers compared different production processes for hypereutectic Al-Si alloys [12][13][14][15]. Investigating the tribological characteristics of samples with and without T6 heat treatment, it was concluded that the wear of T6 samples increases by approximately 14% compared to the hypereutectic Al-Si alloy without heat treatment. ...
... The coefficient of friction (COF) of C3-15 was reduced by ~ 38% compared to the base alloy LM30. As a result of the reported work by Dong et al. [49], Sharama et al. [80] and Gupta et al. [81] the COF of fabricated AMC was 0.40 (40 N, 200 Fig. 15 (a, b, and c), it is apparent that the sample reinforced with fine-sized particles exhibits lower wear loss compared to the coarse-sized particles. Both types of AMCs display abrasive grooves on the sliding surface (the plowing region), indicating the entrapment of fractured asperities between the counter-surfaces. ...
... The photocatalytic degradation and adsorption process has attracted outstanding attention owing to material stability, cost-effectiveness, non-toxicity, enhanced band structure, and high photostability [8,9]. Likewise, photodecomposition of crystal violet by titania and clay in an aqueous solution by an advanced oxidation process has been reported [10], but there has been no literature on periwinkle shell ash (PSA) doping into kaolin for enhanced performance. ...
... Lithium and Strontium were employed as modifiers to improve hygroscopicity and bolster chemical and mechanical properties through the creation of optically valuable non-bridging oxygen, whereas Zn boosted the electron-releasing ability (Colak et al. 2016;Obayes et al. 2016;Saidu et al. 2018;Azlan et al. 2017). Plasmonic metallic nanoparticles (PMNP) such as gold (Au) and silver (Ag) have demonstrated potential in enhancing the emission and quantum efficiency of REIs such as Dy 3+ Singla et al. 2022;Mawlud 2019). Therefore, coupling Dy 3+ with gold nanoparticles (AuNPs) is a promising strategy to enhance emission cross-section by improving absorption cross-sections of Dy 3+ Dehingia et al. 2020). ...
... Interestingly, molybdenum carbide has been the subject of intense studies on electrochemical catalyst and known to accelerate hydrogen evolution reaction due to its Pt-like electrical behavior. 72 Therefore, thanks to the catalytic properties of molybdenum carbide, Reaction 2 will predominantly take place at grain boundaries, and iron nearby will be depleted following Reaction 3. Similarly, a set of reactions can be proposed for corrosion in AlCl 3 -FeCl 3 : where Reaction 4 takes place at molybdenum carbide and Reaction 5 allows for the dissolution of nearby metal matrix. Analogy can be drawn to galvanic corrosion on the microscopic scale, where iron corrodes preferentially when it is in electrical contact with molybdenum carbide. ...
... The striking properties of Al and its alloys are light weight, cost effective, easy to process by various methods, high strength to weight ratio and excellent corrosion resistance [6]. AlMMCs also have excellent tribological properties [18]. Few disadvantages are associated with fabrication of AlMMCs, like costly reinforcement materials, heterogenous reinforcement distribution in the metal matrix. ...
... Engineering fields, such as transportation, aerospace, and sports, can benefit from using these custom-made materials. As a result of their low cost and abundance on the beach, minerals such as silicon carbide [4], garnet [5], and sillimanite [6] are attracting a growing number of researchers. ...
... Hence, cocktails of different anticancer drugs with higher doses are applied to improve the efficiency of treatment, which can ultimately lead to severe liver and/or kidney failure and reduce the overall survival rate [1,2]. To moderate the toxicity of given drugs on different body organs, engineered nanoparticles were developed and used for localized drug delivery at tumor site [3][4][5][6][7][8][9]. This approach minimizes the side effects of drugs while it maximizes their therapeutic efficiency. ...
... There is increasing demand to utilized of costeffective, ecofriendly, and renewable resources for the synthesis of biomaterials. Rice husks, a natural source of silica, have been employed in the synthesis of BG ceramics using the melt-quench method, solgel method, and thermally induced phase separation method [33][34][35][36]. This shift towards using more eco-friendly and sustainable materials is driven by the increasing awareness of the negative impacts of toxic volatile orthosilicate compounds on the environment. ...
... The transformation of sodium silicate solution to silica gel was observed at this pH. This obtained gel was dried in an oven at 100 ℃ to get SiO 2 as the final product [35]. ...