45. Viswanathan, R.; Lilly, G. D.; Gale, W. F.; Gupta, R. B Formation of Zinc Oxide-Titanium Dioxide Composite Nanoparticles in Supercritical Water, Industrial & Engineering Chemistry Research (2003), 42(22), 5535-5540.


Zinc oxide-titanium dioxide composite nanoparticles are prepd. using a supercrit. water reactor-in-series app. Zinc oxide particles are produced from zinc acetate in the first reactor, and the particle suspension is fed to the second reactor where titanium oxide is formed from a titanium tetrachloride soln. yielding ZnO-TiO2 composite nanoparticles. Reverse reactor order is also studied. Rapid and continuous prodn. of nanosized composite particles is achieved in this reactor-in-series app. at 400 C and 245 atm. Dynamic light scattering is used to det. the particle size, transmission electron microscopy is used to det. the particle morphol., and energy-dispersive X-ray spectroscopy is used to det. the compn.


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