全部

• 2018-11-27 04:39發(fā)布了問(wèn)答

  三苯基膦的用途

  　

  461人看過(guò)

• 2018-07-10 07:29發(fā)布了問(wèn)答

  有什么辦法可以找到收含有銠金的礦石的人

  399人看過(guò)

• 2017-05-25 14:33發(fā)布了問(wèn)答

  骨架型鎳催化劑因其具有多孔結(jié)構(gòu)對(duì)氫氣有極強(qiáng)吸附性

  　

  439人看過(guò)

• 2017-03-31 18:39發(fā)布了問(wèn)答

  畢業(yè)論文題目

  　

  429人看過(guò)

• 2017-03-23 16:15發(fā)布了問(wèn)答

  樂(lè)東縣新家具怎么除甲醛去異味

  　

  405人看過(guò)

• 2017-03-21 11:16發(fā)布了問(wèn)答

  生物酶和光觸媒除甲醛哪個(gè)更好？

  　

  672人看過(guò)

• 2016-06-21 02:18發(fā)布了問(wèn)答

  無(wú)機(jī)材料化學(xué)季惠明納米部分

  　

  360人看過(guò)

• 2012-11-24 02:01發(fā)布了問(wèn)答

  氯酸鉀制氧氣的催化劑能否用其他金屬氧化物代替

  　

  489人看過(guò)

• 2012-11-13 20:08發(fā)布了問(wèn)答

  請(qǐng)幫忙翻譯一下，拜托

  A new kind of TiO2 nanotube array/Ni(OH)2 (TiO2/Ni(OH)2) composite electrode with the storage ability of light energy was prepared by the deposition of Ni(OH)2 on the TiO2 nanotube array， which was synthesized by anodizing Ti foils in an HF... A new kind of TiO2 nanotube array/Ni(OH)2 (TiO2/Ni(OH)2) composite electrode with the storage ability of light energy was prepared by the deposition of Ni(OH)2 on the TiO2 nanotube array， which was synthesized by anodizing Ti foils in an HF aqueous solution. SEM and XRD results showed that Ni(OH)2 particles were well distributed on high density， well-ordered and uniform TiO2 nanotube arrays. The photoelectrochemical properties of the TiO2/Ni(OH)2 electrode were investigated in NaHCO3/NaOH buffer solution (pH 10) by means of UV–vis absorption spectra， cyclic voltammogram (CV) and photocurrent measurements. It was found that the TiO2/Ni(OH)2 electrode was highly sensitive to light and exhibited excellent photoelectrochromic properties. Upon UV irradiation， the photogenerated holes by TiO2 nanotube arrays can oxidize Ni(OH)2 to NiOOH， and thus the TiO2/Ni(OH)2 electrode can be photo-charged by light。1. Introduction Among many visible light photocatalysts， TiO2nanostructures have attracted much attention due to high photocatalytic activ-ity， nontoxicity， chemical stability and huge potential applications [1–6]. The TiO2 nanotube array is one of most attention-getting TiO2nanostructures because of large surface area and outstanding charge transport properties. TiO2nanotube arrays can be utilized in dye-sensitized solar cells[7–9]， photocatalysis and hydrogen gas sensing [10]. So far， a variety of methods have been attempted to prepare TiO2 nanotube arrays， such as hydrothermal synthe-sis[11]， Langmuir–Blodgett technique [12]， solution casting [13] and anodization technique[10，14]， etc. Among these methods， the anodization technique has many advantages of low cost， low tem-perature and easy to be scaled up to large-area preparation. Recently， anewkindof photo-functional systemwith theenergy storage ability has been developed by coupling TiO2 photosen-sitive electrode with energy storage materials. In Takahashi and Tatsuma’swork[15]，aTiO2/Ni(OH)2bilayer thinfilmwas suggested for the oxidative energy storage. In this case， a redox-activep-type semiconductor Ni(OH)2is coupled withn-type TiO2photocatalyst to formap–njunction，WhenTiO2is illuminatedby light， holesgen-erated at the junction are separated from excited electrons， trans-ported into the bulk of Ni(OH)2and oxidized Ni(OH)2to NiOOH. Therefore， the oxidative energy storage system was constructed 展開

  530人看過(guò)

• 2010-12-07 19:31發(fā)布了問(wèn)答

  活性炭負(fù)載Pd-Cu催化劑

  采用活性炭負(fù)載Pd-Cu催化劑去除硝酸鹽，diyi次采用硼氫化納還原的時(shí)候沒(méi)有金屬掉下，但是回收后經(jīng)過(guò)干燥、焙燒再還原就有金屬掉下來(lái)，是什么原因

  519人看過(guò)