IR@AMPRI - Advanced Materials and Processes Research Institute (CSIR)
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763 research outputs found
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Photo degradation of synthetic dyes using cadmium sulfide nanoparticles synthesized in the presence of different capping agents.
No full textPhoto-degradation of synthetic dyes by cadmium sulfide nano-particles synthesized by micro-emulsion/arrested precipitation routes using thioglycolic acid; potassium pyrosulfate and disodium salt of ethylene diamine tetra acetic acid (EDTA) as capping agents have been investigated. Synthesized nanoparticles have been characterized by X-ray diffraction, thermo-gravimetric analysis, high-resolution transmission electron microscopy, BET surface area analysis and UV–Vis spectro-photometry. The synthesized cadmium sulfide nano particles are observed to be a mixture of cubic and hexagonal phases and have crystallite size and surface area of 3.7, 6.8 and 13.9 nm and 32.11, 29.54 and 8.63 m2/g for thioglycolic acid, potassium pyrosulfate and EDTA capping agents, respectively. As expected, the photo-catalytic efficiency of nano-particles for degradation of dyes is observed to increase with increase in surface area (decrease in particulate size)
Mechanical and Abrasive and Erosive-Corrosive Wear Properties of Eutectic Al-Si Alloy: Effects of T6 Heat Treatment Parameter
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Sliding Wear Response of a Bronze Bushing: Influence of Applied Load and Test Environment
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Sliding Wear Response of a Gray Cast Iron: Effects of Some Experimental Parameters
No full textThis investigation pertains to the influence of some test parameters like applied load, sliding speed and test environment on the sliding wear behaviour of a grey cast iron. Properties studied were wear rate, frictional heating and friction coefficient in dry and oil lubricated conditions. The wear response of the samples has been discussed in terms of specific characteristics like load bearing, lubricating and cracking tendency of different micro constituents of the cast iron. Examination of wear surfaces, subsurface regions and debris particles has also been carried out to understand the operating wear mechanisms and further substantiate the observed response of the samples
Synthesis of nano-structured 3C-SiC by carbothermal reduction of silicon bearing gel and carbon soot.
No full textNano-sized 3C-SiC was synthesized using sol–gel method. The silica bearing sol was prepared using fumed silica and alkaline ethylene glycol which on hydrolysis resulted in a gel. The gel was mixed with nano-sized carbon particles (obtained from soot) and heat treated in 1300–1580 °C temperature range. The formation of 3C-SiC began at ~ 1400 °C and at 1580 °C it was observed to be the major phase while small amount of 2H-SiC was also present. The silicon carbide synthesized between 1400 and 1580 °C had particles in 30–50 nm range and crystallite size between 15 and 17 nm
Manganese recovery from secondary resources: a green for carbothermal reduction and leaching of manganese bearing hazardous waste.
No full textDuring the hydrometallurgical extraction of zinc by electrowinning process, a hazardous solid waste called anode mud is generated. It contains large quantity of manganese oxides (55-8%) and lead dioxide (6-16%). Due to the presence of a large quantity of lead, the anode mud waste is considered hazardous and has to be disposed of in secure landfills, which is costly, wastes available manganese and valuable land resources. For recovery of manganese content of anode mud, a process comprising of carbothermal treatment using low density oil (LDO) followed by sulphuric acid leaching is developed