海量图书期刊资源,随时随地畅享阅读乐趣
Synthesis and characterization of mesoporous silica-supported nano-crystalline sulfated zirconia catalysts prepared by a sol–gel process: Effect of the S/Zr molar ratioR. Akkari; A. Ghorbel; N. Essayem; F. Figueras · 2007