Synthesis of nitrogen-doped zinc oxide particles by thermal decomposition of mixture between zinc peroxide aqueous sol and ammonium salts(<Feature>Aqueous Solution Science for Ceramic Processing II)

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The nitrogen-doped ZnO particles were prepared by heating a mixture of an ammonium salt and the aqueous sol of zinc peroxide nanoparticles. In the case that the sol of zinc peroxide nanoparticles were mixed with ammonium nitrate in the sol, nitrogen-doped ZnO particles were obtained by heating the mixture at 573K for 1h in the air. The obtained particles showed characteristic Raman peaks that can be assigned to the nitrogen-related local vibrational mode. The strength of the UV-VIS absorption peak, which corresponds to the nitrogen-related impurity state, also increased with increases in the mixed amount of ammonium nitrate (NH_4NO_3). The results of iodometric titration also showed the formation of acceptor states in the obtained nitrogen-doped ZnO particles. The nitrogen-doping successively occurred when the peroxo ions (O_2^<2->) in the zinc peroxide did not react with the anions in the ammonium salts as an oxidizing agent.
社団法人日本セラミックス協会の論文
2009-03-01