A5018927619- Quantum Dots Synthesis And Properties
- Carbon and Quantum Dots Applications
- Perovskite Materials and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Electrochemical sensors and biosensors
- Covalent Organic Framework Applications
- Conducting polymers and applications
- Advanced NMR Techniques and Applications
- Nanomaterials for catalytic reactions
- 2D Materials and Applications
- Asymmetric Hydrogenation and Catalysis
- Luminescence and Fluorescent Materials
- Solid-state spectroscopy and crystallography
- Carbon dioxide utilization in catalysis
- Machine Learning in Materials Science
- Electrocatalysts for Energy Conversion
- Boron and Carbon Nanomaterials Research
- Hydrogen Storage and Materials
- CO2 Reduction Techniques and Catalysts
- Nanocluster Synthesis and Applications
- Electric and Hybrid Vehicle Technologies
- Advanced Battery Technologies Research
- Catalytic Processes in Materials Science
- Chalcogenide Semiconductor Thin Films
- Boron Compounds in Chemistry
National Institute of Advanced Industrial Science and Technology
2024-2025
Indian Institute of Technology Patna
2019-2024
Iowa State University
2019-2024
Ames National Laboratory
2019-2023
Delineated here is the first mechanochemical synthesis of covalent organic frameworks (COF) adsorbents that exhibited exceptional iodine adsorption capacities 6.4–7.1 g −1 , surpassing those most existing COFs.
Supported platinum nanoparticle catalysts are known to convert polyolefins high-quality liquid hydrocarbons using hydrogen under relatively mild conditions. To date, few studies grafted onto various metal oxide (MxOy) supports have been undertaken understand the role of acidity support in carbon–carbon bond cleavage polyethylene consistent catalytic Specifically, two Pt/MxOy (MxOy = SrTiO3 and SiO2–Al2O3; Al 3.0 wt %, target Pt loading 2 % ∼1.5 nm), identical hydrogenolysis conditions (T 300...
Time-resolved spectroscopies unveil the additional effects of widely used methylammonium chloride (MACl) additive on FAPbI 3 photoabsorber in perovskite solar cells, spontaneously modulating heterointerfaces for accelerating carrier injections.
Regulated excited state energy and charge transfer play a pivotal role in nanoscale semiconductor device performance for efficient harvesting optoelectronic applications. Herein, we report the influence of Förster resonance (FRET) on excited-state dynamics transport properties metal halide perovskite nanocrystals (PNCs), CsPbBr3, its anion-exchanged counterpart CsPbCl3 with CdSe/ZnS quantum dots (QDs). We drop FRET efficiency from ∼85% (CsPbBr3) to ∼5% (CsPbCl3) QDs, inviting significant...
Due to their uniqueness in tunable photophysics, transition metal dichalcogenide (TMD) based quantum dots (QDs) have emerged as the next-generation materials for technology-based semiconductor applications. This demands frontline research on rational synthesis of TMD QDs with controlled shape, size, nature charge migration at interface, and easy integration optoelectronic devices. In this article, a solution-processed MoS2 WS2 QDs, we demonstrate disparity structural, optical, electrical...
The electrochemical carbon dioxide reduction reaction (CO2 RR) is a transformative technology to reduce the footprint of modern society. Single-site catalysts have been demonstrated as promising for CO2 RR, but general synthetic methods with high surface area and tunable single-site metal composition still need be developed unambiguously investigate structure-activity relationship crossing various sites. Here, generalized coordination-condensation strategy reported prepare single-atom sites...
Perovskite solar cells (PSCs) have developed rapidly in the last decade, primarily because of improvements their photovoltaic (PV) performance. However, methods characterization and analyses for PSCs remain immature, mostly complex multilayered PSC structure. The sandwiched structure i-type perovskite photoabsorbers having both p-type hole transport materials (HTMs) n-type electron (ETMs) facilitates charge separation photoabsorber thus plays a crucial role developing efficient PSCs. this...
Perovskite solar cells (PSCs) have developed rapidly in the last decade, primarily because of improvements their photovoltaic (PV) performance. However, methods characterization and analysis for PSCs remain immature,...
Abstract Catalytic cleavage of strong bonds including hydrogen-hydrogen, carbon-oxygen, and carbon-hydrogen is a highly desired yet challenging fundamental transformation for the production chemicals fuels. Transition metal-containing catalysts are employed, although accompanied with poor selectivity in hydrotreatment. Here we report metal-free nitrogen-assembly carbons (NACs) closely-placed graphitic nitrogen as active sites, achieving dihydrogen dissociation subsequent oxygenates. NACs...
We studied the mechanism underlying solid-phase adsorption of a heavy rare-earth element (HREE, Yb) from acidic solutions employing MCM-22 zeolite, serving as both layered synthetic clay mimic and new platform for mechanistic study HREE on aluminosilicate materials. Mechanistic studies revealed that Yb(III) at surface site occurs primarily through electrostatic interaction between species. The dependence Yb pH solution indicated role charge, content framework Al suggested Brønsted acid sites...
Perovskite solar cells (PSCs) based on narrow-bandgap formamidinium lead halide (FAPbI3) photoabsorber have garnered substantial attention owing to their high photovoltaic (PV) performances. Extensive studies established that the introduction of methylammonium chloride (MACl) significantly improves bulk quality FAPbI3 so commonly used; while heating photoabsorber’s precursor film, incorporated MACl facilitates crystalline growth FAPbI3, simultaneously volatilizing and dissipating from...
Charge transfer (CT) kinetics at the interfaces of lead-halide-based perovskite nanocrystals (PNCs) are pivotal in dictating efficacies energy conversion. Our investigation delves into intricacies CT between cesium lead bromide (CsPbBr3)-based PNCs and fullerene (C60) employing a suite spectroscopic theoretical investigations. Notably, we discern facile interfacial photoinduced electron (ET) from CsPbBr3 to C60, good agreement with their respective aligned levels. Complementary current...
Photoinduced electron transfer (PET) is a widely studied phenomenon in nanoscale carbon dots (CDs) due to the availability of free electrons on their surfaces. It often treated as molecular ruler understand interaction between nearby donor and acceptor pairs. The current report highlights modulation (ET) process redox-treated CDs with an molecule, menadione (MD), when subjected microemulsion method. In presence cationic CTAB micellar heterogeneity, ET kinetics get markedly altered controlled...
Boron monoxide (BO), prepared by the thermal condensation of tetrahydroxydiboron, was first reported in 1955; however, its structure could not be determined. With recent attention on boron-based two-dimensional materials, such as borophene and hexagonal boron nitride, there is renewed interest BO. A large number stable BO structures have been computationally identified, but none are supported experiments. The consensus that material likely forms a boroxine-based material. Herein, we apply...
Carbon dots (CDs) are 1–10 nm scaled complex nanostructures with a wide range of applications and show unconventional photophysical behavior upon excitation. In this article, we have unveiled some the underlying mechanisms excited state dynamics CDs by perturbing their interface oxidizing reducing agents. With no substantial alteration in size surface-treated oxidized (OCDs), reduced (RCDs), untreated (UCDs), observe marked changes charge transport properties diverse spectral signatures...
The electron transfer (ET) processes in carbon-based quantum dots (CDs) have laid to extensive research endeavors due their tunable optoelectronic properties with alteration surface functionalization, doping, charge, etc. Here, we proffer shreds of evidence on pH-dependent and transport undoped CDs (UCDs) amine-doped (ACDs) a redox-active neurotransmitter, dopamine (DA). A pronounced photoluminescence (PL) quenching is depicted for both the DA, where efficiency substantially increases...
Perovskites (PVKs) have emerged as an exciting class of semiconducting materials owing to their magnificent photophysical properties and been used in solar cells, light-emitting diodes, photodetectors, etc. The growth multidimensional nanostructures has revealed many alterations optoelectronic compared those bulk counterparts. In this work, we spotlighted the influence quantum confinement CsPbBr3 PVKs like dot (PQD), nanoplatelet (PNPL), nanorod (PNR) on charge transfer (CT) dynamics with...
The excellent optoelectronic properties of transition-metal dichalcogenide quantum dots (TMD-QDs) render them useful for perspective applications in disciplines like photonics, sensors, electronics, and photovoltaics. This urges meticulous studies the underlying mechanism charge transfer (CT) carrier transport TMD-QD-based devices. Herein, we investigate variation CT kinetics among TMD-QDs redox-active quinones with intervening surrounding, encapsulation, nature surfactant, structure...
Hyperpolarized propane produced by heterogeneous hydrogenation of cyclopropane with parahydrogen has been proposed as a safe inhalant for sensitivity-enhanced in vivo magnetic resonance imaging. The present studies were initially motivated the possibility to improve pairwise selectivity using Pt–Sn intermetallic nanoparticle catalysts which achieved record high propene. performance Pt3Sn is found be comparable that Rh/TiO2 catalyst employed recent publication. However, significant amounts...
Abstract Tandem catalysis, which allows multiple steps of a reaction to take place without the need for separation and purification, is highly desired design efficient environmentally‐friendly chemical processes. Herein, pyrolysis UiO‐66‐NH 2 , an amino‐functionalized metal‐organic framework, produces nitrogen‐rich carbon‐ZrO composite (CN‐ZrO ). This rich in basic sites effectively catalyzes Knoevenagel condensation reaction. After loading Pt nanoparticles onto this support, tandem catalyst...
In this paper an Internet of Things(IoT)-based automated pipeline management and leakage monitoring system is presented. Despite the present global water crisis issues, reducing use only way to prevent catastrophe shortage from growing worse. Smart sensors are utilized track usage notify consumers when leaks discovered. IoT makes automation enhancement safety standards in a easier. paper, IoT-based detection method with associated sensor control scheme proposed hardware prototype developed...