Investigation Of Mixed Phase Molybdenum Disulfide 1t 2h Mos 2 Based Photocatalytic Materials Towards Energy And Environmental Application

Abstract

The surging energy demands driven by rapid industrialization have led to the newlineoverexploitation and depletion of fossil fuel reserves. Compounding this issue, the newlinecombustion of fossil fuels significantly escalates atmospheric CO2 levels, triggering newlineglobal warming and climate change challenges. In pursuit of sustainable and eco-friendly newlineenergy alternatives, the conversion of solar energy into chemical energy has emerged as newlinea compelling research focus. Visible light-driven photocatalysis, a burgeoning field, newlineoffers a promising solution by efficiently generating hydrogen (H2) through water newlinesplitting and producing hydrogen peroxide (H2O2) under oxygen-saturated conditions. newlineAmidst the extensive array of reported 2D semiconducting nanomaterials, a mixed phase newlinetransition metal dichalcogenide i.e. 1T/2H-MoS2 has garnered significant attention due newlineto presence of both basal as well as edge active sites, ability to facilitate rapid charge newlinetransfer, and improved electron mobility. Additional advantages, such as its simple and newlinecost-effective synthesis, low toxicity, unique absorption properties in the UV-Vis-IR newlineregion and optimal band-edge alignment, further highlight its potential as an efficient newlinephotocatalyst. Here, in this thesis work, first we have modified neat 1T/2H-MoS2 by newlinevarying its several synthesis parameters to form nanosheets with high content of 1T newlinephase for improved charge carrier migration. Further this prepared 1T/2H-MoS2 is newlinemodified with other suitable 2D semiconductors to form heterostructures exhibiting newlinestupendous photocatalytic performances towards photocatalytic TCH degradation, newlinehydrogen evolution as well as H2O2 production. newlineAs a research hotspot, 2D-MoS2 has been regarded as a low-cost substitute for platinum, newlineand has fascinated researchers worldwide. Two crystalline phases of MoS2, i.e. the newlinemetallic octahedral 1T phase and semiconducting trigonal prismatic 2H phase, have been newlineextensively analysed. In comparison to 2H-MoS2, the 1T phase exhibits enhanced and newlineunique physicochemical properties. Designing a