1) depose
[英][dɪ'pəʊz] [美][dɪ'poz]
沉淀，沉积;置放
2) deposition-precipitation
沉积-沉淀
1.
It had been found that gold that highly dispersed over a series of Ti-containing supports by the deposition-precipitation method could catalyze vapor phase propylene epoxidation in H_2-O_2 mixture.
近来发现采用沉积-沉淀法将金高度分散在一些含钛物质表面上时,能够催化 H_2-O_2-丙烯气相体系直接合成 PO。
2.
The pure mesoporous TiO_2 and doped mesoporous TiO_2 by La~(3+) or Ce~(3+) were synthesized by using poly(alkylene oxide)triblock copolymer (designated EO20PO70EO20; P123) as the organic template, which were used as supports to prepare the corresponding supported catalysts by the deposition-precipitation method.
采用三嵌段共聚物聚乙醚-聚丙醚-聚乙醚(EO20PO70EO20,P123)为有机模板剂合成了介孔TiO_2及原位掺杂La~(3+)和Ce~(3+)的介孔TiO_2载体,用沉积-沉淀法制备出一系列负载型Au/TiO_2及掺杂La~(3+)和Ce~(3+)的Au/TiO_2催化剂。
3.
1、The support TiO_2 was synthesized by sol-gel method, and a series of Au/TiO_2 catalysts were prepared by the deposition-precipitation method.
1、以溶胶-凝胶法制备的TiO_2为载体,用沉积-沉淀法制备出一系列Au/TiO_2,考察了焙烧温度、金的负载量、反应液pH值及沉淀剂等制备因素对催化剂活性的影响。
3) laydown
['lei,daun]
沉积，沉淀;搁置，叠置
4) deposition-precipitation
沉积-沉淀法
1.
5% Au/Fe2O3 was prepared by co-precipitation,deposition-precipitation and impregnation separately.
采用共沉淀法、沉积-沉淀法和浸渍法制备了1。
2.
ZrO2 support and Au/ZrO2 catalyst were prepared by aqueous solution precipitation and deposition-precipitation method, respectively.
采用水溶液沉淀和沉积-沉淀法分别制备了ZrO2载体及相应的Au/ZrO2催化剂,通过CO氧化反应考察了载体的制备条件、催化剂的焙烧温度和预处理温度对催化剂活性的影响;通过X射线衍射、氢程序升温还原(H2-TPR)、X射线光电子能谱(XPS)表征,分析了影响催化剂活性的原因。
3.
Some oxides(Al2O3,SiO2,TiO2,MgO)and H-ZSM-5 zeolite were used as supports to prepare Au catalysts by deposition-precipitation(DP)with urea as a precipitator.
选择不同氧化物(Al2O3,SiO2,TiO2,MgO)和H-ZSM-5分子筛作为载体,以尿素为沉淀剂,采用沉积-沉淀法制备了一系列负载型金催化剂。
5) deposition-precipitation
沉积沉淀法
1.
Pd catalysts derived from MgAl hydrotalcite precursors were prepared by three different methods: deposition-precipitation(DP),impregnation(IM),and co-precipitation(CP),which were characterized by ICP,XRD,SEM,TEM,EDS,TPR and surface area measurement.
以沉积沉淀法(DP)、浸渍法(IM)和共沉淀法(CP)制备MgAl水滑石衍生氧化物负载钯催化剂,用ICP、XRD、SEM、TEM、EDS、TPR以及比表面测定等手段对催化剂进行了表征。
2.
5O 2 (CZ) catalysts were prepared by deposition-precipitation (DP), mixing (MIX) and conventional impregnation (IMP) methods, and the effects of the preparation methods on the three-way catalytic behaviors were investigated.
结果表明沉积沉淀法制备的Pd/Ce0 5Zr0 5O2 催化剂 (Pd DP)表现出最强的Pd 载体作用及最优活性 ,原位红外实验发现Pd DP上存在与传统的浸渍法制备的Pd IMP催化剂不同的NO催化还原途径 ,推测Pd 载体间相互作用引起NO还原机理差异 ,进而导致活性差
6) deposition-precipitation method
沉积沉淀法
1.
The Au/TiO_2 photocatalyst was prepared by the deposition-precipitation method and characterized by transmission electron microscopy, diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy.
采用沉积沉淀法制备了Au/TiO2催化剂,用透射电子显微镜、紫外可见漫反射光谱和X射线光电子能谱进行了表征,结果表明,样品在空气中于200℃处理后,金以金属态Au0的形式沉积在TiO2表面。
2.
Using ZnCl2,Al2O3 and Na2CO3 as raw materials,ZnO/Al2O3 composite oxide was prepared by deposition-precipitation method.
以ZnCl2、Al2O3和Na2CO3为主要原料,采用沉积沉淀法制得纳米ZnO/Al2O3光催化剂。
3.
CuO/ZnO catalysts with different CuO content were prepared by deposition-precipitation method for water-gas shift reaction,using Cu(OH)2 as the precursor of CuO.
首次采用沉积沉淀法,以Cu(OH)2为前驱体制备不同CuO负载质量分数的CuO/ZnO水煤气变换(WGS)催化剂,并运用XRD、N2物理吸附和TPR等方法对催化剂进行结构表征。
补充资料：沉淀
| 沉淀 precipitation 从液相中产生一个可分离的固相的过程，或是从过饱和溶液中析出的难溶物质。沉淀作用表示一个新的凝结相的形成过程，或由于加入沉淀剂使某些离子成为难溶化合物而沉积的过程。产生沉淀的化学反应称为沉淀反应。物质的沉淀和溶解是一个平衡过程，通常用溶度积常数Ksp来判断难溶盐是沉淀还是溶解。溶度积常数是指在一定温度下，在难溶电解质的饱和溶液中，组成沉淀的各离子浓度的乘积为一常数。分析化学中经常利用这一关系，借加入同离子而使沉淀溶解度降低，使残留在溶液中的被测组分小到可以忽略的程度。 沉淀可分为晶形沉淀和非晶形沉淀两大类型。硫酸钡是典型的晶形沉淀，Fe2O3·nH2O是典型的非晶形沉淀。晶形沉淀内部排列较规则，结构紧密，颗粒较大，易于沉降和过滤；非晶形沉淀颗粒很小，没有明显的晶格，排列杂乱，结构疏松，体积庞大，易吸附杂质，难以过滤，也难以洗干净。实验证明，沉淀类型和颗粒大小，既取决于物质的本性，又取决于沉淀的条件。在实际工作中，须根据不同的沉淀类型选择不同的沉淀条件，以获得合乎要求的沉淀。对晶形沉淀，要在热的稀溶液中，在搅拌下慢慢加入稀沉淀剂进行沉淀。沉淀以后，将沉淀与母液一起放置，使其“陈化”，以使不完整的晶粒转化变得较完整，小晶粒转化为大晶粒。而对非晶形沉淀，则在热的浓溶液中进行沉淀，同时加入大量电解质以加速沉淀微粒凝聚，防止形成胶体溶液。沉淀完毕，立即过滤，不必陈化。 在经典的定性分析中，几乎一半以上的检出反应是沉淀反应。在定量分析中，它是重量法和沉淀滴定法的基础。沉淀反应也是常用的分离方法，既可将欲测组分分离出来，也可将其它共存的干扰组分沉淀除去。 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条