A procedure for the preparation of Ti-Beta zeolites for catalytic epoxidation with hydrogen peroxide

文献信息

发布日期 2014-01-20
DOI 10.1039/C3GC42534G
影响因子 10.182
作者

Bo Tang, Weili Dai, Naijia Guan, Landong Li, Michael Hunger


查看原文

摘要

Ti-Beta zeolite has been successfully prepared via a reproducible and scalable two-step post-synthesis strategy, which consists of creating vacant T sites with associated silanol groups by dealumination of H-Beta and subsequent dry impregnation of the resulting Si-Beta with titanocene dichloride. The mechanism of Ti incorporation into the framework of Beta is investigated by diffuse reflectance infrared Fourier transform (DRIFT) and multinuclear solid-state nuclear magnetic resonance (SSNMR) spectroscopy. Characterization results obtained from diffuse reflectance ultraviolet-visible (UV-vis) and X-ray photoelectron spectroscopy (XPS) reveal that the majority of incorporated Ti species exist in the form of isolated tetrahedrally coordinated Ti(IV) in the zeolite framework while a minority exists in the form of isolated octahedrally coordinated Ti(VI) at framework or extra-framework positions. The obtained Ti-Beta zeolites are highly active and selective catalysts for the epoxidation of unsaturated ketones, e.g. 2-cyclohexen-1-one, with hydrogen peroxide as an oxidant. A quasilinear correlation between the epoxidation rate and the number of framework Ti(IV) species could be drawn evidencing that these Ti(IV) species are responsible for the epoxidation activity of the Ti-Beta zeolites under study. The impact of preparation parameters and reaction conditions on the catalytic performances of the Ti-Beta zeolites in the epoxidation of unsaturated organic compounds with hydrogen peroxide is discussed in detail.

相关文献

Effects of substituents on fluorometric detection of cyanide anions by indolium–coumarin dyads

Masaya Nakamura, Takayuki Hirai

2015-08-27 Paper

DOI: 10.1039/C5CP03877D

Methanol electro-oxidation on platinum modified tungsten carbides in direct methanol fuel cells: a DFT study

Xiao Lin, Zhao-Yang Chen, P. Hu, Shi-Gang Sun, You-Qun Chu

2015-08-25 Paper

DOI: 10.1039/C5CP02072G

Nonadiabatic dynamics of floppy hydrogen bonded complexes: the case of the ionized ammonia dimer

Jan Chalabala, Petr Slavíček

2016-06-29 Paper

DOI: 10.1039/C6CP02714H

Assessing backbone solvation effects in the conformational propensities of amino acid residues in unfolded peptides

Niranjan V. Ilawe, Alexandra E. Raeber, Reinhard Schweitzer-Stenner, Siobhan E. Toal, Bryan M. Wong

2015-08-27 Paper

DOI: 10.1039/C5CP03646A

Photophysical properties of pyrrolocytosine, a cytosine fluorescent base analogue

Quynh L. Nguyen, Vincent A. Spata, Spiridoula Matsika

2016-05-20 Paper

DOI: 10.1039/C6CP01559J

A chemical chaperone induces inhomogeneous conformational changes in flexible proteins

Djemel Hamdane, Christophe Velours, David Cornu, Magali Nicaise, Murielle Lombard, Marc Fontecave

2016-07-01 Paper

DOI: 10.1039/C6CP03635J

您可能还喜欢

化合物问答

如何储存8-溴-4-羟基-6-(三氟甲氧基)喹啉-3-羧酸乙酯(CAS号:1072944-81-0)?

8-溴-4-羟基-6-(三氟甲氧基)喹啉-3-羧酸乙酯应储存在阴凉、干燥的地方,避免光照和高温。建议使用密封容器进行储存,以防止水分和空气的影响。

1072944-81-0Ethyl 8-bromo-4-hydr...
化合物问答

2,2-二(2-呋喃基)丙烷(CAS号:17920-88-6)的市场或研究趋势如何?

2,2-二(2-呋喃基)丙烷的研究趋势主要集中在新型材料的开发和应用,如高分子材料、有机光电材料等。市场趋势方面,随着环保要求的提高和新材料的应用,该化合物的需...

17920-88-62,2'-(2,2-Propanediy...
化合物问答

如何处理含有螺[呋喃并[3,4-b]吡啶-5(7H),4'-哌啶]-7-酮盐酸盐(CAS号:475152-31-9)的废料?

对于含有螺[呋喃并[3,4-b]吡啶-5(7H),4'-哌啶]-7-酮盐酸盐的废料,应首先进行分类和分离,以减少危险物质的数量。随后,可以考虑通过化学氧化、生物...

475152-31-97H-Spiro[furo[3,4-b]...
化合物问答

Cinnamyl 3-aminobut-2-enoate(CAS号:113898-97-8)安全吗?

Cinnamyl 3-氨基丁-2-烯酸在接触皮肤和眼睛时可能会引起刺激。应避免吸入其粉尘和烟雾。操作时应穿戴适当的个人防护装备,如手套、护目镜和实验室外套。

113898-97-8Cinnamyl 3-aminobut-...
化合物问答

反式-2-十二碳烯二酸(CAS号:6402-36-4)的市场或研究趋势如何?

反式-2-十二碳烯二酸在医药、材料科学等领域有一定的应用,但其市场相对较小。近年来,由于环保意识的提升,对环境友好型化学品的需求增加,研究倾向于开发更绿色的合成...

6402-36-4Traumatic Acid
化合物问答

什么是(9ci)-1H-苯并咪唑-5-乙酸(CAS号:473895-86-2)?

(9ci)-1H-苯并咪唑-5-乙酸是一种含氮杂环化合物,其化学结构为1H-苯并咪唑-5-乙酸。该化合物具有特定的分子式C8H7NO2,属于有机酸类化合物。

473895-86-21H-Benzimidazol-5-yl...
化合物问答

酞菁蓝(CAS号:147-14-8)的主要用途是什么?

酞菁蓝主要用作颜料和染料,广泛应用于塑料、油墨、涂料、纺织品及橡胶工业中。它也用于光敏材料,如太阳能电池和光刻胶。在医疗领域,酞菁蓝因其光敏特性被用于某些光动力...

147-14-8Copper(2+) phthalocy...
化合物问答

5-甲基-1,2,3,4-四氢异喹啉(CAS号:123593-99-7)安全吗?

5-甲基-1,2,3,4-四氢异喹啉在使用和储存时需要谨慎处理。它具有一定的毒性,应避免吸入其蒸气或直接接触皮肤和眼睛。操作此化合物时,建议佩戴防护眼镜、实验服...

123593-99-75-Methyl-1,2,3,4-tet...
化合物问答

如何处理含有3',4',5'-三甲氧基苯乙酮(CAS号:1136-86-3)的废料?

含有3',4',5'-三甲氧基苯乙酮的废液应首先确保其是否为危险废物,根据当地法规确定处理方法。通常,这类有机废液可以采用中和反应降低其pH值,然后通过蒸馏或萃...

1136-86-31-(3,4,5-Trimethoxyp...
化合物问答

如何储存KI-7(CAS号:1489263-00-4)?

KI-7应储存在通风良好的干燥环境中,避免光照和高温。建议使用密封容器储存,并保持在阴凉处。储存温度应控制在室温范围内,一般建议不超过25°C。避免与氧化剂接触...

1489263-00-42-(1-Benzyl-1H-indol...

来源期刊

Green Chemistry

Green Chemistry
CiteScore: 16.1
自引率: 7.5%
年发文量: 944

Green Chemistry provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on, but not limited to, the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998). Green chemistry is the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry is at the frontiers of this continuously-evolving interdisciplinary science and publishes research that attempts to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. Submissions on all aspects of research relating to the endeavour are welcome. The journal publishes original and significant cutting-edge research that is likely to be of wide general appeal. To be published, work must present a significant advance in green chemistry. Papers must contain a comparison with existing methods and demonstrate advantages over those methods before publication can be considered. For more information please see this Editorial. Coverage includes the following, but is not limited to: Design (e.g. biomimicry, design for degradation/recycling/reduced toxicity…) Reagents & Feedstocks (e.g. renewables, CO2, solvents, auxiliary agents, waste utilization…) Synthesis (e.g. organic, inorganic, synthetic biology…) Catalysis (e.g. homogeneous, heterogeneous, enzyme, whole cell…) Process (e.g. process design, intensification, separations, recycling, efficiency…) Energy (e.g. renewable energy, fuels, photovoltaics, fuel cells, energy storage, energy carriers…) Applications (e.g. electronics, dyes, consumer products, coatings, pharmaceuticals, preservatives, building materials, chemicals for industry/agriculture/mining…) Impact (e.g. safety, metrics, LCA, sustainability, (eco)toxicology…) Green chemistry is, by definition, a continuously-evolving frontier. Therefore, the inclusion of a particular material or technology does not, of itself, guarantee that a paper is suitable for the journal. To be suitable, the novel advance should have the potential for reduced environmental impact relative to the state of the art. Green Chemistry does not normally deal with research associated with 'end-of-pipe' or remediation issues.

推荐化合物

推荐供应商

免责声明
本页面提供的学术期刊信息仅供参考和研究使用。我们与任何期刊出版商均无关联,也不处理投稿事宜。如有投稿相关咨询,请直接联系相关期刊出版商。
如发现页面信息有误,请发送邮件至 support@chemtradehub.com 联系我们。我们将及时核实并处理您的问题。