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骨架红外
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  framework ir
     On the framework IR spec- trum,except of the absorption bands6 90 cm-1 ,characteristic of the chromium silicate,an absorption band at96 0 cm-1 which isassigned to the streching vibration of O3 Si- O- T linkages is observed.
     骨架红外光谱中除发现铬分子筛的特征峰 690 cm-1 外 ,还发现被归属于 O3 Si- O- T振动的吸收峰 960 cm-1 ;
短句来源
     It has been proved that Ti is located in the molecular sieve framework by the framework IR spectra, the diffuse reflectance spectra in the UV-VIS region and XPS technique.
     骨架红外(IR)、紫外没反射(DRS)、电子能谱(XPS)等,测试结果证实钛进入分子筛骨架;
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  “骨架红外”译为未确定词的双语例句
     Meanwhile the oxyge n related defect sites disappear in infrared (IR) spectrum after high temperat ure calcination.
     与此同时 ,骨架红外 (IR)谱中氧空位缺陷带消失 .
短句来源
     Compared with the pure MCM-22, a new peak at - 1400 cm-1 changed with the nitrogen content was found in the FT-IR spectrum of nitrogen-incorporated sample, which were attributed to the -NHx.
     通过对比氮化前后分子筛的骨架红外谱图,在~1400 cm1处发现1个随着N含量变化而变化的新峰,将其归属为-NHx特征峰。
  相似匹配句对
     Infrared Therapy
     红外医疗
短句来源
     The Application of Skeleton Extraction Algorithm to Infrared Imaging GIF
     用于红外成像GIF的目标骨架提取算法
短句来源
     The Infrared Measuring Technology for Temperature
     红外测温技术
短句来源
     Analysis of framework Si/Al in mesoporous material L series zeolite by infrared spectrum
     中孔L型沸石骨架Si/Al的红外光谱测定
短句来源
     A Dynamic Approach to Skeletonization
     动态骨架算法
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  framework ir
Evidence for the presence of framework gallium in the mordenite lattice is obtained from chemical analysis, XRD, framework IR, solid state MASNMR, thermoanalytical studies, sorption and catalytic activity studies.
      
The framework IR spectra also showed analogous changes.
      
Titanium incorporation in the framework was evidenced from unit cell volume expansion, framework IR spectra and diffuse reflectance UV-Vis spectra.
      


The Fe-and V-Ti-silicalites molecular sieves with ultralarge pore MCM-41 structure have been synthesized.Characterizations by framework IR spectra together with XRD, ESR, ̄(29)Si MAS NMR, DRS and chemical analysis data have demonstrated that iron atom are incorporated into the Fe-silicate framework,and vanadium and titanium atoms are simultaneously incorporated into the V-Ti-silicalite framework.

水热法合成了具有超大孔MCM-41分子筛结构的含Pe和V-Ti分子筛,通过XRD、骨架IR、ESR、 ̄(29)SiMASNMR、紫外漫反射等测试表征证实,Fe原子在FeMCM-41分子筛骨架上,V和Ti同时进入V-TiMCM-41分子筛骨架。FeMCM-41的骨架红外谱除Fe分子筛的特征吸收峰660cm ̄(-1)外,还显示960cm ̄(-1)峰,ESR谱出现高对称八面体环境Fe(Ⅲ)信号(g=2.0)和扭曲四面体环境Fe(Ⅲ)信号(g=4.2),而V-TiMCM-41的骨架红外960cm ̄(-1)峰强度分别随分子筛中钛或钒的含量线性增强。约在g=1.98处出现的超精细结构ESR信号表明V以分散的不流动的V ̄(4+)形式存在,化学分析结果表明骨架上Ti和V原子相互间不排斥。

eY zeolites were prepared from NH4NaY which was pretreated with(NH4)2SiF6 aqueous solution, then treated with NH4F and Fe(NO3)3 solution at 363 K in buffer solution (pH=4. 0) for 2-4 hours, filtered, washed anddried at 383 K, the above process was repeated once more, the product wasfinally calcined in air at 773 K for 4 hours. The secondary synthetic sampleswere characterized with XRD, IR, ESR, MBS and XPS techniques. The results showed that more iron ions were inserted into the frameWork of zeolitewhen the...

eY zeolites were prepared from NH4NaY which was pretreated with(NH4)2SiF6 aqueous solution, then treated with NH4F and Fe(NO3)3 solution at 363 K in buffer solution (pH=4. 0) for 2-4 hours, filtered, washed anddried at 383 K, the above process was repeated once more, the product wasfinally calcined in air at 773 K for 4 hours. The secondary synthetic sampleswere characterized with XRD, IR, ESR, MBS and XPS techniques. The results showed that more iron ions were inserted into the frameWork of zeolitewhen the sample was pretreated with (NH4)2SiF6 aqueous solution, and samples maintained complete pore volume and adsorption ability. The amount ofiron ions inserted into the framework of samples as tetrahedral coordinatedform increases with the increase of treatment time with Fe salt solution. Theiron ions in framework of zeolite are stable and not easily reduced to Fe(Ⅱ)in certain condition. The insertion of Fe into the zeolite leads to an increasein unit cell parameter, and a red shift of the asymmetric and symmetricstretch frequency, while for the samples untreated with (NH4)2SiF6 which framework structure was unchanged.

采用预处理法二次合成FeY沸石。并用XRD.IR,ESR,MBS等手段对样品进行表征.结果表明,经(NH4)2SiF6预处理的样品,有更多的Fe进入沸石骨架脱铝位.进入排石骨架位的Fe,以四面体或畸变四面体配位形式存在,且不易还原成低价Fe.由于Fe进入怫石骨架,样品的晶胞参数增大,骨架红外反对称和对称伸缩振动频率向低波数位移,而未经(NH4)2SiF6预处理的样品,Fe只能有限地取代骨架位的铝,且骨架结构不发生变化.

V and V-Ti containing molecular sieves with MCM - 41type molecular sievestructure have been synthesized. The intensity of the 960cm ̄(-1) bands in the framework IR spectra of the samples increased with the vanadium contents. The ESRspectra show that vanadium occurs in the 4+ oxidation state, is monoatomicallydispersed, and is not mobile. Raman spectra show the absence of the extra framework vanadium (and titanium). UV DRS, solid - state MAS NMR, andXPS techniques provide additional evidences for the incorporation...

V and V-Ti containing molecular sieves with MCM - 41type molecular sievestructure have been synthesized. The intensity of the 960cm ̄(-1) bands in the framework IR spectra of the samples increased with the vanadium contents. The ESRspectra show that vanadium occurs in the 4+ oxidation state, is monoatomicallydispersed, and is not mobile. Raman spectra show the absence of the extra framework vanadium (and titanium). UV DRS, solid - state MAS NMR, andXPS techniques provide additional evidences for the incorporation of vanadium inthe MCM - 41 type molecular sieve framework. Ti and V do not interfere witheach other when substituting into the molecular sieve framework. The adsorptioncapacity and thermal stability of the samples have also been elucidated.

本文合成出具有MCM—41型结构的含V和V—Ti分子筛,骨架红外、顺磁共振、紫外漫反射、固体魔角核磷、拉曼光谱、电子能借等测试结果表明V在分子筛中主要以分散的不流动的V ̄(4+)离子形式四配位存在于骨架上,Ti的存在不排斥V的同时进入骨架;同时考察了合成条件,吸附性能和热稳定性能。

 
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