Nb2O5·nH2O as a Heterogeneous Catalyst with Water-Tolerant …
2011年3月3日 · Niobic acid, Nb2O5·nH2O, has been studied as a heterogeneous Lewis acid catalyst. NbO4 tetrahedra, Lewis acid sites, on Nb2O5·nH2O surface immediately form …
铌酸 - 百度百科
铌酸为氧化铌的水合物, 分子式为Nb₂O₅·nH₂O 。 铌酸或Nb₂O₅可通过铌的氯化物或醇盐水解制得。 铌酸在工业上是由碱法或酸法从铌铁矿和钽铁矿Fe [ (Nb , Ta)O3] 2 中制得的。例如, 酸法是 …
Nb2O5·nH2O as a heterogeneous catalyst with water-tolerant
2011年3月30日 · Niobic acid, Nb (2)O (5)·nH (2)O, has been studied as a heterogeneous Lewis acid catalyst. NbO (4) tetrahedra, Lewis acid sites, on Nb (2)O (5)·nH (2)O surface …
[求助] 关于水合五氧化二铌(Nb2O5•nH2O)的物化性质 - 催化 - 小 …
原料为：水合五氧化二铌(Nb2O5•nH2O，通常称铌酸)。不知道它能溶于什么溶液？溶液pH对它的影响如何？是不是碱性条件下就形成了沉淀？ 谢谢了解的解答。 [Last edited by linweiguo0 …
Nb2O5·nH2O 作为具有耐水性路易斯酸位点的多相催化剂
2011年3月30日 · 铌酸，Nb (2)O (5)·nH (2)O，已被研究作为非均相路易斯酸催化剂。 NbO (4) 四面体、Lewis 酸位点，在 Nb (2)O (5)·nH (2)O 表面上立即形成 NbO (4)-H (2)O 加合物在水的 …
Facile preparation of SBA-15-supported niobic acid (Nb2O5·nH2O …
2009年8月31日 · Hydrated niobium oxide (niobic acid) was effectively supported on mesoporous silica SBA-15 by HCl treatment of colloidal niobium oxide solution. The obtained Nb/SBA-15 …
五氧化二铌的酸性和催化性质,Bulletin of the Chemical Society of …
Nb2O5·nH2O 表面即使在空气中加热 100 °C 后仍表现出强酸性（H0≤-5.6），但在更高温度下热处理时强酸位点消失。 根据吸附吡啶的 IR 研究，在中等温度下热处理的催化剂上的活性位点 …
Synthesis of Nb2O5·nH2O nanoparticles by water-in-oil …
2010年2月1日 · Hydrous niobium oxide (Nb 2 O 5 · n H 2 O) nanoparticles had been successfully prepared by water-in-oil microemulsion.
Structure and Acid Catalysis of Mesoporous Nb2O5·nH2O
2010年5月7日 · Mesoporous Nb2O5·nH2O was prepared using amphiphilic block copolymers (L64, P103, and P123) that acted as structure-directing agents. Mesoporous Nb2O5·nH2O …
Nb 2 O 5 ·nH 2 O as a Heterogeneous Catalyst with Water-Tolerant …
2011年3月1日 · Nb2O5 showed outstanding potential as a catalyst support for FPO-LP HDO, taking into account the improved properties of the upgraded oil, such as higher carbon content …
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