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首页> 外文期刊>Catalysis science & technology >V2O5/TiO2 and V2O5/TiO2-SO42- catalysts for the total oxidation of chlorobenzene: one-step sol-gel preparation vs. two-step impregnation
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V2O5/TiO2 and V2O5/TiO2-SO42- catalysts for the total oxidation of chlorobenzene: one-step sol-gel preparation vs. two-step impregnation

机译：V2O5 /二氧化钛和V2O5 / TiO2-SO42 -催化剂的总氯苯氧化:一步法溶胶-凝胶制备与两步浸渍

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摘要

This paper examines the effect of the preparation method of sulfated and unsulfated V2O5/TiO2 catalysts on chlorobenzene total oxidation. In particular, the method of incorporation of vanadium, either by impregnation or by direct introduction of V during the preparation of TiO2 or TiO2-SO42- aerogel supports, is discussed. The obtained catalysts have been characterized by means of ICP-AES, N-2 adsorption-desorption at 77 K, XRD, Raman spectroscopy, DRIFTS, XPS, H-2-TPR and NH3-TPD. Without sulfate, the impregnated catalyst exhibits a higher V dispersion and performs better than the sol-gel catalyst. The beneficial effect of sulfate groups is clearly demonstrated as both the impregnated and one-pot sol-gel samples with sulfate markedly outperform the corresponding samples without sulfate. The sulfated one-pot sol-gel catalyst exhibits the best performance at high temperature, probably thanks to its sulfate-rich surface.
机译：本文制备的影响硫酸法和unsulfated V2O5 /二氧化钛总氧化催化剂在氯苯。整合的方法钒,通过浸渍或直接介绍V在二氧化钛的制备或TiO2-SO42 -气凝胶支持,进行了探讨。得到的催化剂的特征icp - aes、n - adsorption-desorption享年77岁K, x射线衍射、拉曼光谱漂移,XPS, H-2-TPR和NH3-TPD。展品更高的V色散和催化剂执行比溶胶-凝胶催化剂。硫酸组显然是有益的影响证明了浸渍和锅溶胶-凝胶法硫酸和样品明显跑赢大盘相应的样品没有硫酸。展现了硫酸锅溶胶-凝胶催化剂可能最佳的性能在高温下由于其硫酸盐表面。

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