查询词典 X-ray diffraction

Ray the average degree of polymerization of bamboo cellulose was determined by viscosimetry method and the crystalline structure were studied by infrared spectra and X ray diffraction respectively .

采用60Coγ射线对高聚合度的造纸用竹纤维素浆粕进行辐照处理，用铜氨溶液法测定辐照前后竹纤维素浆粕的平均聚合度，并采用红外光谱法及X射线衍射法研究其结晶结构的变化。

After irradiation by~(60)Co γ-ray,the average degree of polymerization of bamboo cellulose was determined by viscosimetry method,and the crystalline structure were studied by infrared spectra and X-ray diffraction,respectively.

采用60Coγ射线对高聚合度的造纸用竹纤维素浆粕进行辐照处理，用铜氨溶液法测定辐照前后竹纤维素浆粕的平均聚合度，并采用红外光谱法及X射线衍射法研究其结晶结构的变化。

The catalyst was characterized by transmission electron microscopy, X-ray diffraction and energy dispersion X-ray spectrum.

利用透射电镜、X-射线衍射和能量散射X-射线能谱对催化剂进行了表征，并用循环伏安实验评价了催化剂对甲醇电化学氧化的电催化活性。

Nanostructured zirconia doped with yttria was prepared by co-precipitate method. The structures were characterized by X-ray diffraction and Extend X-ray absorption fine structure . The influences of calcined temperature and Y〓O〓 concentration on structure in crystallization process were studied systematically.

1利用XRD和EXAFS方法对共沉淀方法制备的非晶和纳米ZrO〓：Y〓O〓的结构进行了表征，比较系统地研究了不同处理温度和不同Y〓O〓掺杂浓度在其晶化过程中对结构的影响，并讨论了氧空位所处的位置。

The structural evolution of ultrafine NiB and NiP amorphous alloys prepared by c hemical reduction during the annealing process is investigated by X-ray absorpt ion fine structure, X-ray diffraction and differential thermal ana lysis techniques.

摘 要：采用X射线吸收精细结构，X射线衍射和差热分析等方法研究了以化学还原法制备的NiB和NiP超细非晶态合金催化剂在退火过程中的结构变化。

The morphology and microstructure characteristics of the apertured silver doped TiO2 microtubes were characterized by means of the X-ray powder diffraction, thermal analysis, transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy and N2 absorption.

氮吸附的结果显示该样品具有很高的比表面积，银的修饰没有显著影响二氧化钛微管的孔结构； XRD的表征结果显示，银修饰的二氧化钛多孔微管具有良好的锐钛矿晶型； XPS的分析结果表明银以游离的金属态存在； TEM的观测结果显示，银团簇沉积于二氧化钛纳米晶粒的表面。

SO〓〓/M〓O〓 solid superacid was applied to the photocatalytic oxidation of organic pollutants for the first time. Porous SO〓〓/TiO〓 solid superacid catalysts with high specific surface area were prepared by sol-gel method. The photocatalytic degradation of bromomethane was used as model reaction. The influence of impregnation with H〓SO〓 solution on the structure of catalysts and their photocatalytic performance was systematically studied by using X-ray diffraction, X-ray photoelectron spectroscopy, N〓 sorption analysis applying BET method, UV-Vis diffuse reflectance spectroscopy, FTIR spectroscopy, O〓-TPD and photocatalytic activity measurement. The acidity of TiO〓-based catalysts was investigated by Hammett indicator method, NH〓-TPD and IR spectra of pyridine adsorbtion. The mechanism of superacidifing effects on photocatalytic performances such as the photocatalytic degradation rate of bromomethane, apparent kinetic constant and apparent quantum efficiency was discussed.The results indicated that SO〓〓 is combined with metal ions of TiO〓 in a chelating bidentate mode.

本文首次将SO〓〓/MxOy型固体超强酸催化剂用于光催化氧化有机污染物研究，采用溶胶-凝胶法制备了具有多孔性和大比表面结构的二氧化钛基固体超强酸光催化剂SO〓〓/TiO〓，以光催化降解溴代甲烷为模型反应，系统地研究了H〓SO〓浸渍处理对催化剂表面酸性及其气相光催化性能的影响，结合XRD、BET、XPS、FTIR、Hammett指示剂法、吡啶吸附红外光谱、NH〓-TPD、O〓-TPD、紫外可见漫反射光谱等多种表征手段，深入地讨论了超强酸化对TiO〓的改性机理，阐明了引起SO〓〓/TiO〓超强酸催化剂光催化降解溴代甲烷的转化率、表观反应速率常数和表观量子效率变化的本质原因。

These catalysts were evaluated by a liquid phase hydrogenation of crotonaldehyde to crotyl alcohol and characterized by X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy.

采用沉积－沉淀法制备了纳米Au/TiO2催化剂，以X射线衍射、透射电子显微镜、X射线光电子能谱等手段对催化剂进行了系统的表征，并考察了该催化剂在巴豆醛液相加氢制巴豆醇反应中的催化性能。

The HPW/M-SiO2 catalyst is characterized by means of infrared-ray spectrum, X-ray diffraction and n-C4H9NH2 Potentiometric titration. The effects of amount of the catalyst, molar ratio of acid and alcohol, reaction temperature and reaction time on synthesis of methyl mandelate have been investigated.

运用IR， XRD和n-C4H9NH2电位滴定法测试技术表征HPW/M-SiO2催化剂，考察了催化剂用量、物料配比、反应温度和反应时间等对扁桃酸甲酯合成的影响。

Methods Deproteinized bones were made through a series of physicochemical treatment from pig ribs and were analyzed with histology,scanning electron microscopy,infrared spectrum,X-ray diffraction analysis,X-ray energy scattering analysis,microdose Kjeldahl determination and mechanical analysis.

方法对猪肋骨进行一系列理化处理，制成脱蛋白骨，并对其进行组织学、扫描电镜、红外光谱、X射线衍射分析，X射线能量散射分析、微量凯氏定氮及力学性能测定。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。