Journal ArticleDOI
Hydrothermal synthesis of octahedra-based layered niobium oxide and its catalytic activity as a solid acid
TLDR
In this paper, a layered-structure-type niobium oxide was synthesized by the hydrothermal method by using ammonium nbO6 octahedra and {Nb6O21} pentagonal units.About:
This article is published in Catalysis Science & Technology.The article was published on 2014-11-04. It has received 118 citations till now. The article focuses on the topics: Niobium oxide & Niobium.read more
Citations
More filters
Journal ArticleDOI
Structural Studies of Bulk to Nanosize Niobium Oxides with Correlation to Their Acidity
Hannah Theresa Kreissl,Molly Meng Jung Li,Yung-Kang Peng,Keizo Nakagawa,Thomas J. N. Hooper,John V. Hanna,Ashley M. Shepherd,Tai-Sing Wu,Yun-Liang Soo,S. C. Edman Tsang +9 more
TL;DR: Hydrated niobium oxides are used as strong solid acids with a wide variety of catalytic applications, yet the correlations between structure and acidity remain unclear.
Journal ArticleDOI
3D N-doped hybrid architectures assembled from 0D T-Nb2O5 embedded in carbon microtubes toward high-rate Li-ion capacitors
TL;DR: In this paper, a unique nitrogen-doped T-Nb2O5/tubular carbon hybrid structure was synthesized, in which TnO5 nanoparticles were homogeneously embedded in an in-situ formed nitrogen-Doped microtubular Carbon, utilizing a facile and innovative synthesis strategy.
Journal ArticleDOI
Niobium oxides: Correlation of acidity with structure and catalytic performance in sucrose conversion to 5-hydroxymethylfurfural
Hannah Theresa Kreissl,Keizo Nakagawa,Keizo Nakagawa,Yung-Kang Peng,Yusuke Koito,Junlin Zheng,Shik Chi Edman Tsang +6 more
TL;DR: In this paper, it was shown that mesoporous niobium oxides possess Bronsted acid (BA) and Lewis acid (LA) sites of tunable quantity and strength, dependent on their structure and morphology.
Journal ArticleDOI
Dibenzothiophene hydrodesulfurization with NiMo and CoMo catalysts supported on niobium-modified MCM-41
Franklin J. Méndez,Oscar E. Franco-López,Xim Bokhimi,Dora Alicia Solís-Casados,Luis Escobar-Alarcón,Tatiana Klimova +5 more
TL;DR: In this paper, the authors studied the effect of the addition of niobium to CoMo/MCM-41 and NiMo/NiMo-41 catalysts on their characteristics and performance in the hydrodesulfurization of dibenzothiophene.
Journal ArticleDOI
Ultrathin HNb3O8 nanosheets with oxygen vacancies for enhanced photocatalytic oxidation of amines under visible light irradiation
Junli Chen,Hai Wang,Zhiqiang Zhang,Lifeng Han,Yong-Hui Zhang,Feilong Gong,Ke-Feng Xie,Liancai Xu,Wei Song,Shide Wu +9 more
TL;DR: In this article, ultrathin HNb3O8 nanosheets with oxygen vacancies were successfully synthesized by a simple bottom-up hydrothermal process, which showed higher photocatalytic oxidative coupling reaction of benzylamine under visible light irradiation.
References
More filters
Journal ArticleDOI
Tunable near-infrared and visible-light transmittance in nanocrystal-in-glass composites
TL;DR: This work introduces tin-doped indium oxide nanocrystals into niobium oxide glass (NbOx), and realizes a new amorphous structure as a consequence of linking it to the nanocry crystals, which demonstrates a previously unrealized optical switching behaviour that will enable the dynamic control of solar radiation transmittance through windows.
Journal ArticleDOI
Structural chemistry and Raman spectra of niobium oxides
Jih-Mirn Jehng,Israel E. Wachs +1 more
TL;DR: In this article, the pyrolysis of TVSb was investigated in a flow tube reactor using Dz and He carrier gases, and it was shown that the activation energy for pyrolynsis is less than the expected Sb-vinyl bond strength.
Journal ArticleDOI
Nb2O5·nH2O as a heterogeneous catalyst with water-tolerant Lewis acid sites.
Kiyotaka Nakajima,Yusuke Baba,Ryouhei Noma,Masaaki Kitano,Junko N. Kondo,Shigenobu Hayashi,Michikazu Hara +6 more
TL;DR: A part of the adducts can still function as effective Lewis acid sites, catalyzing the allylation of benzaldehyde with tetraallyl tin and the conversion of glucose into 5-(hydroxymethyl)furfural in water.
Journal ArticleDOI
Polyol-Mediated Preparation of Nanoscale Oxide Particles.
Claus Feldmann,Hans-Otto Jungk +1 more
TL;DR: Largely monodisperse, crystalline nanoscale oxide particles (for example, Cu2 O, TiO2, Nb2 O5 ) are preparatively accessible with the polyol method and can be employed readily for the homogeneous coating of various substrates.
Journal ArticleDOI
Exfoliated nanosheets as a new strong solid acid catalyst
Atsushi Takagaki,Mariko Sugisawa,Darling Lu,Junko N. Kondo,Michikazu Hara,Kazunari Domen,Shigenobu Hayashi +6 more
TL;DR: NH(3) temperature-programmed desorption and (1)H magic-angle spinning nuclear magnetic resonance spectroscopy revealed that HTiNbO(5) nanosheets have strong Brønsted acid sites, whereas HSr(2)Nb( 3)O(10) nanOSheets do not.
Related Papers (5)
Niobium Compounds: Preparation, Characterization, and Application in Heterogeneous Catalysis.
Izabela Nowak,Maria Ziolek +1 more