CAJ | 학술논문

探索Au纳米粒子对新型材料的催化性能可以显著拓宽金催化剂的应用范围。使用TiO2-B作为载体，担载Au纳米粒子并应用于低温CO氧化反应体系。TiO2-B为长度5～20μm的微米级纤维，Au纳米粒子粒径在3 nm以下，均匀地分散在TiO2-B表面。CO 氧化测试表明，Au纳米粒子的性能受TiO2-B焙烧温度的影响，不同焙烧温度会引起Au分散性以及Au纳米粒子与载体相互作用的改变。分散于纯TiO2-B载体上的金的催化活性可与其分散在锐钛矿纳米粉体上的相媲美。此外，300℃下活化的Au纳米粒子表现出了最佳的CO氧化性能，在氧化性气氛中活化的催化剂的催化性能优于在惰性和还原性气氛中活化的催化剂。
탐색Au납미입자대신형재료적최화성능가이현저탁관금최화제적응용범위。사용TiO2-B작위재체，담재Au납미입자병응용우저온CO양화반응체계。TiO2-B위장도5～20μm적미미급섬유，Au납미입자립경재3 nm이하，균균지분산재TiO2-B표면。CO 양화측시표명，Au납미입자적성능수TiO2-B배소온도적영향，불동배소온도회인기Au분산성이급Au납미입자여재체상호작용적개변。분산우순TiO2-B재체상적금적최화활성가여기분산재예태광납미분체상적상비미。차외，300℃하활화적Au납미입자표현출료최가적CO양화성능，재양화성기분중활화적최화제적최화성능우우재타성화환원성기분중활화적최화제。
Exploring the catalytic performance of gold nanoparticles on the novel materials can effectively extend the application of gold catalyst. In this case, TiO2-B is used as a support to load gold nanoparticles for low-temperature CO oxidation. The TiO2-B was shaped in micron-scale fibers with length of 5-20μm, and the gold nanoparticles with size of~ 3 nm could be uniformly dispersed on the surface of TiO2-B. CO oxidation tests showed that the catalytic performance of gold nanoparticles was influenced by calcination temperature of TiO2-B which gave rise to the difference in gold dispersion and interaction between gold nanoparticles and support. The activity of gold deposited on the support with pure TiO2-B phase could exceed/match that on anatase nanopowders. Moreover, the gold nanoparticles activated at 300℃ showed the best CO oxidation performance, and the catalyst activated in oxidative atmosphere had a better catalytic performance than that in inert or reductive atmosphere.