Executive Summary : | Transition metal-based chalcogenide quantum dots (TMCQDs), semiconductor quantum dots (TMSCQDs), and nanoparticles (TMNPs) are promising materials in various fields, including photo- and electro-catalysis, ions and molecular sensing, white light generation, and fuel cells. ZnO, MoS2, and AgNPs/AuNPs are the most used nanomaterials in toxin degradation reactions (TDRs), hydrogen evolution reactions (HERs), and direct alcohol fuel cells (DAFCs) due to their excellent catalytic efficiency and enhanced stability. However, heterojunction-based nanocomposites of ZnO/MoS2 QDs and highly anisotropic Ag/Au NPs (branched, layered, and polarized nanoparticles) are not well studied. To make these nanocomposites environment-friendly, bio-mediated synthetic protocols will be used, with L-cysteine, extract of Catharanthus roseus, and extract of Murraya Koenigii Spreng as stabilizers. The synthesized QDs and NPs will be coupled via heterojunctions to form new nanocomposites, and their structural, chemical, and electronic properties will be characterized. The research aims to find simple, effective bio-friendly synthetic strategies to fabricate new QD-NP-based heterojunction-based nanocomposites with better catalytic efficiency, stability, and durability in energy and environmental science to support India's energy security and environmental sustainability. |