查询词典 photocatalytic

The results of photocatalytic degradation to methyl orange show that the mixed crystallite of anatase and brookite has the best photocatalytic activity.

光催化降解甲基橙活性结果表明锐钛矿和板钛矿混晶具有最好的光催化活性。

In a static photocatalytic reactor,the gas-phase adsorption and photocatalytic degradation of benzene and butyraldehyde over the two photocatalysts were studied,and the intermediates and products were detected by gas chromatography.

利用溶胶-凝胶并水热处理法制备了TiO2光催化剂和TiO2/AC复合光催化剂，在静态光催化反应器中研究了苯和丁醛的气相吸附和光催化降解，利气相色谱分析确定了生成的中间体。

In this paper, under the condition of systematic discussing the endangerment of waste water including phenol ,the present treatment method, the mechanism of photocatalytic of TiO2 semiconductor and the reaction of magnetic chymistry, a new method of taking off phenol is proposed:photocatalytic degradation of phenol by TiO2 coupling with magnetic field.

本文在系统的论述了含酚废水的危害及其处理技术、半导体TiO2光催化和磁化学反应的机理的基础之上，提出了磁场-TiO2光催化耦合降解水中苯酚的新方法。

In this thesis the preparation of doped composite semiconductor photocatalyst as well as its photocatalytic performance for hydrogen production was searched. The reseach works is composed of two parts: The first part was the study on the preparation of CdS-SiO_2 and its photocatalytic performance.

本文研究了复合掺杂半导体可见光催化剂的制备及其光催化制氢性能，主要分为两个部分：一、复合半导体催化剂CdS-SiO_2的制备及其光催化性能研究。

The results: the phase transferring range of TiO2 is between 600-750℃; with the doping of tourmaline, the UV-VIS adsorption spectrum of Nd/TiO2 was basically not affected, and showed a gradual Einstein shift with the increase of calcined temperature between 300-750℃; OH intensity of Nd/TiO2 could be enhanced both in irradiation and in no irradiation when tourmaline was added in it; the doping of 0.6% tourmaline led to the best photocatalytic activity of Nd/TiO2 and the best photocatalytic effect appeared when calcined at 600℃.

结果发现TiO2的相变转化区间在600~750℃范围内；电气石掺入对Nd/TiO2材料的光吸收范围基本没有影响，在300~750℃范围煅烧后，随温度升高UV-VIS图谱有逐渐红移现象；电气石的加入使得Nd/TiO2材料在光照及未光照条件下都起到增强OH强度的作用；在Nd/TiO2材料中掺入0.6%的电气石获得最好的光催化活性，600℃下煅烧光催化效果较优。

The photocatalytic oxidation performance and kinetics of the simulated organic wastewater in a circulating slurry photocatalytic reactor was investigated.The effects of operation conditions, such as dosage of photocatalyst, illumination time, initial benzamide concentration, pH value, anions and cations in wastewater, on the photocatalytic oxidation performance were discussed.

采用循环式浆态光催化反应器对苯甲酰胺模拟废水光催化氧化特性和动力学进行了研究，系统地考察了操作条件对模拟污染物光催化降解的影响，并与搅拌式和鼓泡床式浆态光催化反应器中苯甲酰胺的降解效果进行对比。

The apparent quantum efficiency of SO〓〓/TiO〓 was 10 times of that of TiO〓 catalyst for the photocatalytic degradation of bromomethane. Therefore, the SO〓〓/TiO〓 superacid catalyst is promising for practical application in environmental remediation.It was found that both L and B acid sites exist on SO〓〓/TiO〓 photocatalyst while only L acid sites on TiO〓 photocatalyst. On the basis of experimental results, the synergistic model of superacidic centers was proposed for SO〓〓/TiO〓 photocatalyst to explain the photocatalytic behavior and the mechanism of superacidifing effects, assuming that the adjacent L and B acid sites induced by SO〓〓 comprise cooperatively the superacidic center on superacid photocatalyst. The group cooperation of the superacidic center could strengthen the surface acidity, increase surface acid sites and the adsorbtion of O〓, promote separation of photogenerated electron-hole pair, enhance the interfacial transfer of charges and reversibility of water adsorption. Consequently the excellent photocatalytic activity, reaction stability and resistibility to humidity of SO〓〓/TiO〓 superacid photocatalyst may attributed to the group cooperated effect of the superacidic center on the photocatalyst.

研究结果表明：SO〓〓与TiO〓表面的结合为螯合式双配位结构；TiO〓光催化剂表面经H〓SO〓浸渍处理后，提高了表面酸性，改善了催化剂结构和光催化性能，当H〓SO〓浸渍浓度为1.0mol.L〓、烧结温度为450℃时，可制得SO〓〓/TiO〓超强酸催化剂(H〓＜-12.14)，其结构和光催化活性得到明显改善，与TiO〓相比，SO〓〓/TiO〓光催化剂的锐钛矿含量高、晶粒小、BET比表面积大、孔径分布集中、光谱吸收边蓝移，具有优异的光催化氧化活性、稳定性及抗湿性能，光催化降解溴代甲烷的表观量子效率比TiO〓催化剂提高了一个数量级，是一种有实际应用前景的高效光催化剂；由此提出了SO〓〓/TiO〓超强酸催化剂表面集团协同作用的超强酸中心模型，认为在SO〓〓/TiO〓超强酸催化剂表面，由SO〓〓诱导的相邻L酸中心和B酸中心组成了集团协同作用的超强酸中心，其集团协同作用显著地增强了催化剂表面酸性、增大了表面酸量及O〓吸附量、促进了光生电子和空穴的分离及界面电荷转移，具有可逆吸附水的性能，是SO〓〓/TiO〓超强酸催化剂具有优异的光催化氧化活性、很好的活性稳定性及抗湿性能的重要原因。

The experimental results showed that, monochloroacetic acid and dichloroacetic acid enhanced photocatalytic hydrogen generation activity, but trichloroacetic acid did not improve it. The amount of produced H_2 increases almost proportionally to the irradiation time within 5 h irradiation. The photocatalytic oxidation of monochloroacetic acid and dichloroacetic acid mainly produced CO_2, HC1 and CH_2O, the photocatalytic oxidation of trichloroacetic acid mainly produced CO_2 and HCl.

实验表明，一氯乙酸、二氯乙酸的存在明显地提高了制氢反应效率，而三氯乙酸的存在却不能起到促进作用；反应5h内，反应生成氢的量与反应时间成线性关系；一氯乙酸、二氯乙酸光降解产物主要是CO_2、HCl和CH_2O，三氯乙酸光降解产物主要是CO_2和HCl；研究了溶液pH值对放氢反应的影响；在实验浓度范围内，一氯乙酸、二氯乙酸浓度对放氢反应的影响，表观上符合Langmuir-Hinshelwood关系式；考察了一氯乙酸、二氯乙酸在光催化剂表面的吸附。

Experiments showed that the photocatalytic reduction of inorganic oxidizing species and the photocatalytic oxidation of the organic compounds are synergically. This indicates that the COD value is proportional to the amount of the photocatalytic reduction of inorganic oxide.

实践表明，无机氧化物光催化还原和有机物的光催化氧化是协同进行的，因此我们可以由光催化还原无机氧化物量的变化来定量计算水样中的COD值。

The results show that perfect anatase nanocrystalline TiO2 can be obtained by SGRTSE method and the photocatalytic activity of TiO2 can be improved by doping and surface treatment. In the experimental system, the addings of proper salts are beneficial to the photocatalytic degradation of DBSNa. The pH value of solution, adding amount of TiO2, flow rate of air, and initial concentration are the main influence factors for the photocatalytic degradation of methyl orange, and the apparent reaction order is pseudo-first-order, which could be described by Langmuir- Hinshelwood equation.

结果表明：sol-gel法结合室温溶剂蒸发诱导可制备出晶型良好的锐钛型纳米TiO_2；过渡元素和稀土元素杂原子掺杂，贵金属掺杂和表面酸化处理是有效提高TiO_2光催化活性的途径；试验体系中，在DBSNa的降解过程中加入适量的盐，可以大大加速降解效果；光催化降解水中有机物，溶液pH值，TiO_2投加量，曝气速率，被降解物起始浓度等是影响降解效果的重要因素；对起始浓度较低的有机物光催化降解过程可利用简化的Langmuir-Hinshelwood动力学方程进行描述，反应级数为拟一级。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！