Technogenic Zinc Usage Possibilities Investigation for Gold Cementation

Energy-saving method for technogenic waste processing

Dumps of a mining-metallurgical complex of post-Soviet Republics have accumulated a huge amount of technogenic waste products. Out of them, Kazakhstan alone has preserved about 20 billion tons. In the field of technogenic waste treatment, there is still no technical solution that leads it to be a profitable process. Recent global trends prompted scientists to focus on developing energy-saving a...

Possibilities of Usage LBIC Method for Characterisation of Solar Cells

Therapeutic possibilities of plasmonically heated gold nanoparticles.

Nanoparticles of gold, which are in the size range 10-100 nm, undergo a plasmon resonance with light. This is a process whereby the electrons of the gold resonate in response to incoming radiation causing them to both absorb and scatter light. This effect can be harnessed to either destroy tissue by local heating or release payload molecules of therapeutic importance. Gold nanoparticles can als...

Zinc–gold cooperative catalysis for the direct alkynylation of benzofurans

The direct alkynylation of benzofurans was achieved for the first time using the hypervalent iodine reagent 1-[(triisopropylsilyl)ethynyl]-1,2-benziodoxol-3(1H)-one (TIPS-EBX) based on the cooperative effect between a gold catalyst and a zinc Lewis acid. High selectivity was observed for C2-alkynylation of benzofurans substituted with alkyl, aryl, halogen and ether groups. The reaction was also...

Electrochemical Studies on the Cementation of Copper and Cobalt with Zinc

The work described i n t h i s thes i s deals mainly w i t h a fundamental study of two cementation react ions , i . e . , Cu(II)/Zn and Co(II)/Zn, using the electrochemical techniques of l inear potential sweep voltammetry, cycl i c vol tammetry, chronopotentiometry ( s t r ipp ing) , capacitance measurements, r ing current measurements and impedance spectroscopy. In addi t ion, solution analy...