Praveen Kumar Yadav

Bio: Praveen Kumar Yadav is an academic researcher from Council of Scientific and Industrial Research. The author has contributed to research in topics: Ion & Refinery. The author has an hindex of 2, co-authored 9 publications receiving 12 citations. Previous affiliations of Praveen Kumar Yadav include The National Academy of Sciences, India & Academy of Scientific and Innovative Research.

Nanotechnology for a sustainable future

Abstract: Nanotechnology is an emerging area of science and technology, which will leave no area untouched by its groundbreaking scientific achievements and innovations. It is the science of tiny particles. There is no field in our daily life, where the contribution of nanotechnology is left behind, from food safety, water purification, energy saving, agriculture science, medicines, diseases treatments, drug-delivery systems, catalysis, and cosmetics. The advantages of nanotechnology in our day-to-day life are unexpectedly very high, as every field of science, including engineering, chemistry, physics, and biology, is interlinked with nanotechnology. The innovations of this technology are revolutionary. In comparison to old traditional techniques of water purification, diagnosis, food packing, electrical appliances, for instance, these areas have been greatly advanced by utilizing nanotechnology. It enables the world with new unique products which are designed at the nano or atomic level, providing cost-effective methods for renewable energy sources in the form of solar cells, and keeping the environment clean. It saves time, money, and human resources. This chapter discusses the approaches, properties, and applications of nanotechnology in various fields such as water treatment, agriculture science, medicines, drug delivery, and energy saving, and explains how traditional methods have been advanced by nanotechnology.

Effective remediation of fluoride from drinking water using cerium-silver oxide composite incorporated with reduced graphene oxide

Abstract: The adsorption capacity of adsorbents towards fluoride removal depends on the component of the adsorption system, such as optimizing parameters, matrix of the adsorbent, and entrapped metal oxides. In the present study, we have developed reduced graphene oxide (rGO)-incorporated cerium‑silver mixed oxide composite (rGO-Ce/Ag) and Ce/Ag bimetallic oxide, for removal of fluoride effectively from the sample solution as well as real water samples. Our aim of this study is to study the effect of rGO matrix on the adsorption capacity of the bimetallic oxide. Both these adsorbents were characterized by FTIR, XRD, TGA/DTA, FESEM, EDX, TEM and BET to understand the physiochemical which had been engaged for defluoridation from aqueous solutions. The results of surface analysis give the surface area of rGO-Ce/Ag and Ce/Ag are 375 and 174 m2/g, respectively which clearly shows that the surface area of rGO-Ce/Ag composite is much higher as compared to the Ce/Ag oxide and hence its adsorption capacity. The adsorption capacity of rGO-Ce/Ag and Ce/Ag are 434.78 and 294.11 mg/g with 99.5 and 95.7% removal, respectively which is consistent with the surface analysis results. Both the adsorbents shows similar adsorption kinetics follows pseudo-second order model and followed Freundlich adsorption isotherm i.e. multilayer type of adsorption mechanism on heterogeneous surface of adsorbent, might be due to same entrapping metals, the matrix only plays the role of enhancing adsorption sites and surface area.

Nanotechnology in sustainable agriculture: Present concerns and future aspects

Abstract: Nanotechnology is a promising field of interdisciplinary research. It opens up a wide array of opportunities in various fields like medicine, pharmaceuticals, electronics and agriculture. The potential uses and benefits of nanotechnology are enormous. The current global population is nearly 7 */billion with 50% living in Asia. A large proportion of those living in developing countries face daily food shortages as a result of environmental impacts or political instability, while in the developed world there is surplus of food. For developing countries, the drive is to develop drought and pest resistant crops, which also maximize yield. The potential of nanotechnology to revolutionise the health care, textile, materials, information and communication technology, and energy sectors has been well publicized. The application of nanotechnology to agriculture and food industries is also getting attention nowadays. Investments in agriculture and food nanotechnologies carry increasing weight because their potential benefits range from improved food quality and safety to reduced agricultural inputs and improved processing and nutrition. While most investment is made primarily in developed countries, research advancements provide glimpses of potential applications in agricultural, food, and water safety that could have significant impacts on rural populations in developing countries. This review is concentrated on modern strategies used for the management of water, pesticides, limitations in the use of chemical pesticides and potential of nano-materials in sustainable agriculture management as modern approaches of nanotechnology. Key words: Agriculture, nanotechnology, nanofertilizer, nanoencapsulation, nanoherbicides.

A Novel K-Ion Battery; Hexacyanoferrate(II)/Graphite Cell

Abstract: Recently, research on novel and low cost batteries has been widely conducted to realize large-scale energy storage systems. However, few of the battery systems have delivered performance equal to that of Li-ion batteries. Herein, we propose non-aqueous K-ion batteries by developing hexacyanoferrate(II) compounds (so-called Prussian blue analogues), K1.75Mn[FeII(CN)6]0.93·0.16H2O and K1.64Fe[FeII(CN)6]0.89·0.15H2O, as affordable positive electrode materials. In particular, K1.75Mn[FeII(CN)6]0.93·0.16H2O prepared by a simple precipitation process delivers a high capacity of 141 mA h g−1 at 3.8 V as the average operating potential, resulting in a comparable energy density to that of LiCoO2, with excellent cyclability and rate performance in K half-cells. Operando X-ray diffraction measurements reveal that the excellent electrochemical performance of this material is attributed to its open and flexible framework, which can realize fully reversible K+ extraction/insertion and a structural change from monoclinic to tetragonal via cubic phases. For the first time, we demonstrate an inexpensive high-voltage K-ion full cell with a K1.75Mn[Fe(CN)6]0.93·0.16H2O/graphite configuration to prove its feasibility as a new promising battery system for an environmentally friendly future.

Recent advances in layered LiNixCoyMn1xyO2 cathode materials for lithium ion batteries

Abstract: Lithium cobalt oxide, LiCoO2, has been the most widely used cathode material in commercial lithium ion batteries. Nevertheless, cobalt has economic and environmen- tal problems that leave the door open to exploit alternative cathode materials, among which LiNixCoyMn1−x−yO2 may have improved performances, such as thermal stability, due to the synergistic effect of the three ions. Recently, intensive effort has been directed towards the development of LiNixCoyMn1−x−yO2 as a possible replacement for LiCoO2. Recent advances in layered LiNixCoyMn1−x−yO2 cathode materials are summarized in this paper. The preparation and the performance are reviewed, and the future promising cathode materials are also prospected.

GeSe/BP van der Waals Heterostructures as Promising Anode Materials for Potassium-Ion Batteries

Abstract: Potassium-ion batteries have attracted attention because of their abundant resources and similar electrochemistry to Li-ion batteries (LIBs). In the present work, GeSe/black phosphorus (BP) heterostructures as promising anode materials for K-ion batteries (KIBs) have been systematically investigated by first-principles calculations. The results reveal that GeSe/BP exhibits a semiconductor-to-metal transition after incorporating K atoms, indicating enhanced conductivity compared to monolayer GeSe. The energy barrier for K atom diffusion on GeSe/BP surface is relatively lower than that on monolayer GeSe. In addition, the GeSe/BP heterostructure can accommodate up to five layers of K atoms with negative adsorption energy, which greatly improves the storage capacity. Hence, the GeSe/BP heterostructure has great potential for application in advanced electrode materials in KIBs.