Metal Oxide Sulfides Nanostructures for Gas Sensor Supercapacitor and Catalysis Applications

Abstract

the first chapter the overalldetails about gas sensor, supercapacitor and catalysis are discussed in the field of nanotechnology. Development in gas sensor, supercapacitor, and catalysis for the society with the help of nanotechnology explains in details. The development of the gas sensor, supercapacitor, and catalyst as well as historical context, numerous forms of gas sensors, supercapacitors, and catalysts based on various types of materials as sensors, energy storage, and catalytic elements are also covered.In addition, the goals and objectives of the current investigation are clearly stated. newlineSecond chapter in this thesis includes the introduction of synthesis method selected (chemical bath deposition) for synthesis of metal oxide and metal sulphide. Also, it provides the detail information about the characterization techniques used for to know the structure, morphology, elemental composition sensor, supercapacitor and catalyst properties of the as synthesized metal oxides and metal sulphide composites. By using XRD and Ramanstudies, the structural recognition of the fabricated sample was acknowledged. Brunauer-Emmett-Teller method (BET) spectrum was taken into consideration for the surface area.FESEM and HRTEM were used for surface analysis study. In the third chapter investigation details of chemically synthesized hydrangea type bismuth molybdenum oxide (Bi2MoO6)is presented which later has employed for the detection of smoke and humidity at room-temperature. For preparation, 0.1 M Bi-(NO3)35and#1468;H2O was dissolved in 4 mL HNO3 containing 4 mL TEA and 50 mL deionized water. About 2 M NaOH solution was added drop-wise into initially prepared solution with constant stirring by maintaining 200 rpm speed on REMI 1MLH stirrer to make solution clear and transparent. Lastly, 0.2 M Na2MoO4.2and#1468;H2O was dissolved in 20 mL deionized water and solution was stirred well for 30 min before starting the reaction. After that a clear transparent precursor solution was added into the falcon tube of 40 mL capacity along with 7.5 × 2.