Prasanta Kumar Sahoo

• M.Tech, PhD
• Scientist D at National Institute of Hydrology

Groundwater is a vital natural resource for a healthy society and economy. The study of groundwater involves both geological and chemical aspects and its importance in characterizing the natural systems, understanding the contaminant sources involved, and their remedies.

Nitrogen-doped carbon dots (N-CDs) and vertically-grown tin disulfide (SnS2) nanosheets are synthesized via hydrothermal method and chemical vapor deposition technique, respectively. The SnS2 nanosheets are directly fabricated on flexible carbon cloth (CC), and then their basal planes are decorated with N-CDs. The as-prepared composite electrodes a...

The goal of the current study is to form a Z-scheme heterojunction between narrow band gap In2S3 (indium sulphide) and wide band gap BiOBr (bismuth oxobromide) to minimize the photoinduced charge carrier recombination and increase the visible light harvesting capacity of the nanocomposite for Cr(vi) elimination from polluted water. The exfoliated a...

This study aimed to synthesize a Zn-AgIn5S8/CdS/SrGO nanocomposite for Cr (VI) removal from contaminated water under solar irradiation. To prevent photo corrosion of CdS, a Z-scheme heterojunction was formed between...

Many industrial effluents release cyanide, a well-known hazardous and bio-recalcitrant pollutant, and thus, the treatment of cyanide wastewater is a major challenge. In the current study, a CuFe2O4–SnO2-rGO nanocomposite was synthesized to remove cyanide from an aqueous system. The structural and morphological characterizations of the nanomaterials...

Recently, there has been a significant interest in the application of SnS2/MoS2 2D nanostructure composites inlithium-ion batteries (LIBs) due to their advantageous conversion, intercalation, and alloying reactions, leadingto high capacity during charge and discharge cycles. In this study, we successfully synthesized SnS2/MoS2composites with a 2D-n...

Multifunctional nanocomposites have shown great interest in clean energy systems and environmental applications in recent years. Herein, we first reported the synthesis of Dy2NiMnO6 (DNMO)/reduced graphene oxide (rGO) nanocomposites utilizing a hybrid approach involving sol−gel and solvothermal processes. Subsequently, we investigated these nanocom...

Graphene, the most fascinating 2D form of carbon with closely packed carbon atoms arranged in a layer, needs more attention in various fields. For its unique electrical, mechanical, and chemical properties with a large surface area, graphene has been in the limelight since its first report. Graphene has extraordinary properties, making it the most...

Europium is the “rarest” rare-earth element in the earth’s crust. Nanocomposite-mediated adsorptive extraction of europium is very promising due to cost-effectiveness and environmental acceptability. A new-fangled ethylene glycol nano zerovalent...

Supercapacitors have gained significant attention owing to their exceptional performance in terms of energy density and power density, making them suitable for various applications, such as mobile devices, electric vehicles, and renewable energy storage systems. This review focuses on recent advancements in the utilization of 0-dimensional to 3-dim...

The novel multiferroic flexible films of Dy2NiMnO6 (DNMO) were prepared by incorporating DNMO particles in Polyvinylidene fluoride-based co-polymeric P(VDF-HFP) system. The structural studies validated the crystalline structure of DNMO remains unaffected by the presence of polymer. The scanning electron microscopic image of the composite sample con...

The present work includes the synthesis and characterization of zinc ferrite (ZnFe2O4)/graphene nanosheets composite as electrodes for supercapacitor application. The structural properties were studied using x-ray diffraction and Raman spectroscopy. The synthesized electrode was further analyzed with scanning electron microscopy (SEM) and transmiss...

The present work includes in situ synthesis of cobalt oxide and carbon nanocomposite by a solution-based approach. First, a slurry of sucrose and cobalt oxide nanoparticles in water was prepared, and then, it was dried in oven to obtain a dry powder. The powder sample was kept in tube furnace at high temperature in order to form carbon from sucrose...

SnS2 is a promising candidate for an electrode material in lithium-ion batteries and photocatalysts due to its high accessible surface area and significant interlayer nanostructure. Here, we have synthesized hierarchically SnS2 layered nanostructure developed on nickel foam through a facile one-step template-free solvothermal process. FESEM images...

Increasing demand for pure, safe, and affordable water is one of the biggest challenges worldwide. Various pollutants such as dyes, heavy metals, bacteria, pesticides, and pharmaceuticals are present in water and their removal is the major challenge for us. In this respect, various materials have been developed to remove the various types of pollut...

Increasingly, iron oxide nanoparticles are being synthesized due to their unique properties and applications. They are some of the most abundant minerals on Earth and they exist in varying phases and possess different crystal structures, sizes, and shapes in nature. This book provides a comprehensive and updated review of iron oxide nanoparticles,...

Ag-NiS material was synthesized by a facile and low cost effective process through hydrothermal method. The sulphide based nanomaterials revealed excellent pseudo-capacitance and great electrochemical stability because of their good mechanical stability and electrical conductivity. The reversibility of the charge discharge cycle has been optimized...

The increasing demand for uncontaminated and affordable water is now the biggest challenge worldwide. Therefore, there is an urgent need to remove the soluble organic effluents from wastewater and make water reusable. In this aspect, two different morphologies of ZnO nanostructures (NPs and NRs) were developed by a soft-chemical approach and their...

Pollution from microplastics (MPs) is a serious problem for the environment that becomes worse every year. There have been warnings about the extensive dissemination and the harm it could do to the environment and human health. MPs in drinking water raise public health concerns when people consume them through drinking water systems, even though th...

Herein, sucrose derive carbon coated iron oxide (SDCC-Fe2O3) composite was fabricated by sucrose and iron oxide. The sample was annealed at 1200 °C, during annealing sucrose has transformed into carbon and this carbon has coated uniformly on the surface of iron oxide particles. SDCC-Fe2O3 composite is examined by powder X-ray diffraction (XRD), Ram...

Quest for clean and cheap source of energy has resulted in the development of organic photovoltaics as a new avenue for conversion of solar energy to electrical energy. The use of cheap organic materials in the solar cells could significantly reduce the cost and enhance the ease of fabrication of conventional inorganic material-based solar cells. T...

Green chemistry has been shown to be an effective method for producing nanoparticles (NPs). Since the previous decade, plant extract-based green synthesis of different NPs has been intensively explored. Despite the fact that the green synthesis approach for nanomaterials is non-toxic and sustainable, a lack of specific information on green synthesi...

Cost effectiveness and environmental toxicity are the two most important factors in environmental remediation technologies and sustainable development. In this regard, technology based on nano zerovalent iron (nZVI) or iron nanoparticles has proven to be particularly promising. Because of its large surface area and prominent reductive character, it...

Ultrathin 2D nano materials are gaining enormous attention after Geim and co-worker reported graphene from mechano-chemical exfoliation of ordered graphite. The extraordinary optoelectronic and physico-chemical properties of ultrathin 2D nanomaterials owing to its unistructural features offer diversified applications. Artificial photosynthesis is a...

Iron oxide nanostructures have been considered very promising material as electrode in electrochemical energy storage devices because of their lower cost of synthesis and high theoretical charge storage capacity. Iron oxide nanoparticles and their nanocomposites have performed excellent in supercapacitor. Iron oxide as negative electrode has extend...

This article discusses response surface methodology (RSM) modeling, followed by optimization of various castor biodiesel and fossil diesel blends, engine loading, and fuel injection pressure of a diesel engine powered by castor oil biodiesel blends. Based on the response surface methodology, the Box-Behnken technique was utilized for experimental d...

Plastic is one of the most serious environmental threats. Plastic is a non-biodegradable substance that releases various hazardous compounds that cause cancer and other serious illnesses, as well as endangering aquatic life and polluting the environment. The use of waste plastic in the production of a variety of nanomaterials can protect people and...

In this study, nickel ferrite (NiFe2O4) nanoparticles synthesized by a solution based approach have been investigated for supercapacitor application. To prepare the electrode of supercapacitor, NiFe2O4 nanoparticles were deposited on a stainless steel substrate by drop casting method. The structural and morphological properties of the synthesized N...

A facile and rapid microwave synthesis method was used to make Co/Ni-carbon black (CB) nanocomposites. Several sophisticated techniques confirm the formation and the effects of carbon nanoparticles incorporated into Co/Ni-CB composites. Carbon engrafted Co/Ni composite demonstrates excellent morphology, more significant area, and higher conductive...

A simple one-step solvothermal approach has been adopted for the synthesis of SnS2. SEM shows hierarchically SnS2 with petal-like 3-dimensional layer structures because of this process. In this investigation, the as-prepared electrode material have an excellent specific capacitance of 721F g⁻¹ at 1 mVs⁻¹, indicating extraordinary performance. The i...

In the present study, an attempt has been made to design a solar light driven N-rGO-ZnO-CoPc(COOH) 8 nanocomposite for the degradation of cyanide. The morphological and structural characterization of the synthesized nanocomposite was performed by XRD, FT-IR, XPS, UV-vis DRS, FESEM, TEM, EDS, PL spectra and BET surface area. The results revealed tha...

Integration of semiconductor quantum dot and noble metal nanoparticles can efficiently couple numerous effects corresponds to the individual domains of the hybrid system for varieties of applications. Herein, we establish a direct correlation between electronic band structure and optical band gap of monometallic and bimetallic alloy nanoparticles d...

The present work includes the fabrication and electrochemical characterization of cobalt oxide (CO3O4)/graphene nanosheets nanocomposite as efficient electrode for supercapacitor application. The characterization techniques involved in this work are scanning electron microscopy and transmission electron microscopy for surface morphology, Raman spec...

Construction of porous three-dimensional (3D) heterostructured materials is promising for establishing high-performance energy-storage devices, enabling large surface area, facilitated ion and electron transport, and synergistic effects between multi-components. Here, we report a simple and cost-efficient freeze-casting method to improve the electr...

This review covers the developments towards graphene based composite electrodes for supercapacitor application. In particular, graphene is being considered as the potential electrode material for high power supercapacitor application because of its extraordinary physical and chemical properties such as large specific surface area, good electrical c...

Since Prof. Grätzel and co-workers achieved breakthrough progress on dye-sensitized solar cells (DSSCs) in 1991, DSSCs have been extensively investigated and wildly developed as a potential renewable power source in the last two decades due to their low cost, low energy-intensive processing, and high roll-to-roll compatibility. During this period,...

An attempt has been made for the treatment of cyanide contaminated wastewater using a S-TiO 2 @rGO heterogeneous photocatalyst system immobilized on polyurethane foam (PUF) supporting materials. Further, to make the photocatalytic system more efficient and active under visible light, a highly efficient iron porphyrin derivative sensitizer viz. Fe-T...

The production of hydrogen via the water splitting process is one of the most promising technologies for future clean energy requirements, and one of the best related challenges is the choice of the most highly efficient and cost effective electrocatalyst. Conventional electrocatalysts based on precious metals are rare and very-expensive for large-...

Lightweight, flexible, wearable, and portable electronic gadgets have drawn significant attention in modern electronics industry. To power these gadgets, great efforts have been made to develop highly efficient energy-storage equipment. Among various power sources, a supercapacitor, acting as a bridge between the conventional battery and electrolyt...

Among numerous heavy metals, hexavalent Chromium [Cr (VI)] place a potential threat and mostly seen in several industrial effluents such as leather tanning, printing, ceramics. For removal of Cr from waste water, reduction of Cr (VI) to Cr (III) is preferred due to less toxicity of Cr (III) than Cr (VI). Among various reduction processes, Cr (VI) r...

The ternary polymer blend nanocomposites were prepared by solution casting method using ethylene vinyl acetate (EVA), ethylene propylene diene terpolymer (EPDM) and 0–10 phr loaded halloysite nanotubes (HNTs). The dielectric permittivity, dielectric loss tangent (tanδ), impedance spectra and electrical conductivity of the nanocomposites were invest...

Zinc Oxide has important role in solar cell as it may enhance the absorption of light into the device and improve the electrical transportation. In the present work, we have used drop casting approach to fabricate the nanocrystalline ZnO film on a glass substrate. Zinc acetate dehydrate and ethanol were used as a starting material and solvent, resp...

Due to environmental crisis and developed numerous portable electronic device and electric vehicles, it is necessary to find commercial alternative energy source to fulfil the future charge storage demand. In the present work, we have addressed the facile sol–gel root for the synthesis of Bismuth ferrite (BFO) along with modified carbon solution. T...

Direct methanol fuel cells (DMFCs) have been shown potential interest in several portable electronics for “green” power generation, however their large-scale commercial production are mostly hampered due to the low activity and high cost of the anode catalysts. In the present study, we report a facile, environmentally friendly, and cost-effective P...

In the present study, cobalt oxide (Co3O4) nanoparticles have been synthesized using cobalt nitrate as its source by precipitation approach. The structural properties of the synthesized Co3O4 nanoparticles were studied using × ray diffraction (XRD). The XRD results confirm the crystalline nature of the nanoparticles. Further, scanning electron micr...

Multifunctional lightweight and mechanically robust aerogels have been shown potential interest in flexible electronics and electromagnetic interference (EMI) shielding applications. In this work, we demonstrate an environmental friendly template assist cost-efficient silver/3D graphene aerogels (Ag/GAs) by one step freeze-casting route and explore...

A novel and low cost electrochemical method has been developed for the non-enzymatic detection of the hydrogen peroxide using cobalt ferrite (CoFe2O4), carbon nano tubes (CNTs) modified glassy carbon electro (GCE), and the sensor has been named as CoFe2O4/CNTs/GCE. The CoFe2O4/CNTs nanocomposite has been successfully synthesized through a facile on...

Developing non‐noble‐metal electrocatalyst for non‐enzymatic H2O2 sensing is highly attractive. A facile, two‐step approach has been utilized for the synthesis of PBNCs/SnO2 QDs/RGO ternary nanocomposite. TEM, SEM, XPS, and XRD techniques were used to characterized the structural and morphological properties of synthesized ternary nanocomposite.The...

This study presents a fabrication and electrochemical properties of nickel ferrite/graphene nanocomposite as electrodes material for supercapacitor application. The as‐prepared electrode was characterized using X‐ray diffraction, scanning electron microscopy, transmission electron microscopy and X‐ray photoelectron spectroscopy. The electrochemical...

A facile hydrothermal method is adopted for the synthesis of hierarchical flowerlike nickel sulfide nanostructure materials and their composite with carbon quantum dot (NiS/C-dot) composite. The composite material exhibited good performance for electrochemical energystorage devices as supercapacitor with a specific capacity of 880 F g−1 at a curren...

Developments of new and highly effective multifunctional materials are shown great interest in recent years. Herein, we report a simple, cost efficient, one-step, surfactant free cellular 3D-graphene/Ag nanocomposites using freeze-casting method and explore further for supercapacitor, catalytic and antibacterial applications. FE-SEM and HRTEM analy...

Polyaniline-modified carbon nanotube composite nanofibers are deposited on carbon paper substrate using two steps template-free chemical oxidative deposition process. Regular nanofibers mat was observed through microscopy, and suggested better dispersion and interfacial adhesion ability of modified CNT with PANI matrix, which provided distinct arch...

Development of advanced materials for electrocatalytic and photocatalytic water splitting is the key in utilization of renewable energy. In the present work, we have synthesized MoS2 nanoparticles embedded over the graphene oxide (GO) and reduced graphene oxide (rGO) layer for superior catalytic activity in the hydrogen evolution process (HER). The...

Porous architectures of 3D-graphene that is assembled with noble metals (Au, Pd and Pt) nanoparticles have been successfully fabricated through a one-step greener route by using a low-cost freeze-casting method. The as-synthesized noble metals/3D-graphene nanocomposites exhibit ultralow density and interconnected 3-D porous networks with uniform di...

Electrochemically deposited manganese dioxide films have shown excellent supercapacitor properties when deposited over stainless steel substrates. Deposited films are characterized using X-ray diffraction and microscopic techniques. Effect of annealing on the supercapacitor properties of the films has been evaluated. Manganese dioxide films of diff...

Gold nanoparticles (AuNPs) and reduced graphene oxide (RGO) composite modified carbon paste electrode (CPE) was prepared by electrodepositing AuNPs over the reduced graphene oxide (RGO) modified carbon paste electrode. The composite material was characterised using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and at...

Carbon black (CB) decorated Ni/Co oxide composite electrodes are fabricated in-situ with variable CB percentage by using successive ionic layer adsorption and reaction (SILAR) method. This green process tuned the metal ions concentration on carbon and offered binder-free, facile and scalable features. The structure, morphology and electrochemical p...

Development of a low cost, high efficient and easy retrievable catalyst with improved reusability is a major challenge in the area of advanced catalysts. In this study, we report a simple one-step approach for the fabrication of reduced graphene oxide (RGO)/ Co dendritic nanocomposite. The structure and morphology of the as synthesized material are...

Nonwoven fibrous mats of polyaniline/carbon black on conducting substrates are synthesized through a two-step oxidative process. Adsorbed and catalyzed aniline monomers in the synthesis process improved the doping degree (0.381) in the hybrid fibers. The formation of a porous mat on substrates was confirmed by using electron microscopy and small-an...

In-situ homogeneous dispersion of noble metals in three-dimensional graphene sheets is a key tactic for producing macroscopic architecture, which is desirable for practical applications, such as electromagnetic interference shielding and catalyst. We report a one-step greener approach for developing porous architecture of 3D-graphene/noble metal (P...

The catalytic performance of metals can be enhanced by intimately alloying different metals with Reduced Graphene Oxide (RGO). In this work, we have demonstrated a simplistic in situ one-step reduction approach for the synthesis of RGO/Pt-Ni nanocatalysts with different atomic ratios of Pt and Ni, without using any capping agents. The physical prop...

We report the intercalation of dexamethasone sodium phosphate drug in Mg/Al layered double hydroxides (LDHs) through co-precipitation technique. The as-synthesized nanohybrid was characterized by XRD, FTIR and thermal analysis techniques, which reveal that the dexamethasone phosphate anions are accommodated within the brucite layers. The shifting i...

New approach is used to cast piezoelectric films by anchoring zinc oxide in polyvinylidene fluoride and dielectric behavior was compared with conventional composites. Structural characterization was carried out by using powder X-ray diffraction and suggested the enhancement of �-phase in PVDF-ZnOdisperse and PVDF-ZnOanchor composites compared to pu...

The dispersion of metal nanoparticles on reduced graphene oxide (RGO) sheets potentially provides a new way to develop novel catalytic, magnetic, adsorbing, and electrode materials. In this work, we report the structural and magnetic properties of RGO/metal (Bi, Pt, Ni, and Pt-Ni) nanocomposites. Such nanocomposites are successfully synthesized by...

An in situ modified Hummers method (without the use of any surfactants) has been used for the deposition of bismuth (Bi) nanoparticles onto the surface of reduced graphene oxide (RGO) sheets. The as-synthesized nanocomposites were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, transmiss...

A novel two-stage approach is invoked for the laser enrichment of sulphur isotopes. It consists of sequentially photolysing SF6 at −78°C in the same cell with different lines of the CO2 laser in different stages. The requisite chemical link between the stages is facilitated by carefully controlling the presence or absence of a scavenger during irra...