染料敏化太阳电池TiO2光阳极研究进展

纳米TiO2是目前性能最为优良的染料敏化太阳电池(DSSC)光阳极材料。文章系统综述了优化纳米TiO2光阳极的染料吸附、电子传输、再生染料等性能的技术和方法,主要包括纳米TiO2光阳极薄膜微结构的调控、TiO2光阳极的离子/元素掺杂、TiO2光阳极的表面包覆、TiO2光阳极的表面处理等方面的国内外研究进展,并分析了目前TiO2光阳极存在的主要问题及未来的发展方向。     

壳聚糖-纳米二氧化钛微球处理染料废水的研究

以壳聚糖-纳米二氧化钛微球为絮凝剂处理染料废水,研究了其对染料废水的脱色性能和COD的去除率。初步考察了pH值、壳聚糖-纳米二氧化钛微球对脱色效果的影响,比较了壳聚糖与壳聚糖-二氧化钛微球处理艳蓝染料废水的数据,壳聚糖-纳米TiO2的脱色效果和COD的去除率明显优于壳聚糖,实验结果表明用壳聚糖-纳米TiO2是处理难降解染料废水的有效方法。     

TiO2降解有机染料废水的研究进展

印染工业的发展加剧了环境污染,传统的处理染料废水的方法存在许多难以克服的缺点.从保护环境和节省能源的角度出发,人们对TiO2应用在染料污水降解领域的研究给予了较大的关注.本文从TiO2的催化机理,降解方式,负载方式以及可降解的染料种类等方面进行了归纳,指出了目前TiO2在降解有机染料方面的一些不足,并对其发展方向进行了预测.     

紫外辐射法低温制备柔性TiO_2薄膜电极及其性能研究

采用先研磨后超声波分散的方法制备了TiO2涂膜胶体,由其涂敷的TiO2薄膜经过紫外辐射处理后,获得了组装染料敏化太阳能电池的柔性TiO2薄膜电极。用扫描电子显微镜、红外吸收光谱仪和紫外可见光谱仪对TiO2薄膜电极进行了表征,同时,用数字源表测试了电池的光电性能。结果表明:TiO2薄膜电极具有多孔结构,其经过紫外辐射处理后,有机物完全去除;N3染料敏化后,使其吸光度增大,组装成的电池,其光电转换效率达到0.93%。     

纳米二氧化钛在水处理中的研究进展

介绍了纳米TiO2制备方法及光催化氧化还原机理,概述了纳米TiO2光催化技术在降解农药废水、含油废水、染料废水、造纸废水及自来水处理中的应用,提出了纳米TiO2在水处理应用中存在的问题及解决措施,并对TiO2光催化材料在水处理中的发展趋势进行了展望。     

TiO_2光催化处理高浓度SF blue染料废水研究

对TiO2光催化处理高浓度SF blue制衣染料废水的效果及其影响因素进行了研究.结果表明,TiO2光催化对SF blue染料废水具有很好的处理效果,用量少、处理浓度高,且在发生光催化降解的同时还伴随着光分解反应,表观反应级数为二级.此外,适当鼓入空气对提高TiO2的光催化效率有一定促进作用.     

纳米TiO2光催化法和UV—Fenton法联合作用的应用研究

文章通过对不同浓度和不回种类羽印染废水进行、处理可知,UV-feton／纳米TiO2催化氧化法为处理染料废水提供了一种可广泛运用的方法。不同浓度的染料废水其降解效率会有不同,但是基本都可适甩。多数染料废水都可以适用于此实验方法。     

纳米二氧化钛的光催化性能及其在有机污染物降解中的应用

纳米TiO2 具有光催化性能 ,利用太阳光能将有机污染物矿化为CO2 和H2 O。从TiO2 的光催化降解机理入手 ,讨论了影响纳米TiO2 光催化性能的因素及提高光催化性能的方法 ,列举了纳米TiO2 光催化降解处理染料废水、农药废水、含有表面活性剂的废水以及含油废水的应用。最后提出目前存在的一些问题及其解决途径     

TiO2光催化剂降解有机染料的研究进展

印染和照相工业的发展加剧了环境污染,传统的处理染料等废水的方法存在许多难以克服的缺点。TiO2具有稳定性好、光效率高和不产生二次污染等特点,因此被认为是最有应用前景的光催化剂。通过掺杂改性的方法可以将只能UV光激发的TiO2光催化反应红移到可见光区域进行,也可以利用染料敏化的途径实现可见光光催化反应。本论文将介绍国内外在可见光TiO2光催化降解有机染料研究方面的最新进展。有39篇参考文献。     

TiO2光催化氧化法处理染料废水的研究

采用TiO2光催化氧化法处理染料废水,讨论TiO2投加量、废水初始pH和光照时间对废水的CODCr去除率和脱色率的影响。结果表明:各因素对CODCr去除率影响程度的顺序为TiO2投加量>pH>光照时间;最佳反应条件为TiO2投加量3 g/L,pH=6.00,光照时间60 min;在最佳条件下,废水的CODCr去除率达到63.75%,色度去除率达到89.9%。TiO2光催化氧化法对染料废水的有效处理具有可行性。     

纳米TiO2多孔微球对模拟染料废水的光催化脱色

采用纳米TiO2多孔微球光催化氧化处理模拟染料废水,研究了溶液pH值、纳米TiO2用量、光照时间、离心时间等因素对脱色率的影响,并探讨了脱色机理。结果表明。在染料浓度为65mg·L^-1、溶液pH值为2、纳米TiO2用量为7OOmg·L^-1、光照时间为2h、离心时间为15min时的脱色率最高,脱色效果最好。为纳米TiO2多孔微球在废水处理中的应用提供了理论基础。     

Preparation, characterization, and application of titanium nano-tube array in dye-sensitized solar cells

ABSTRACT: The vertically orientated TiO2 nanotube array (TNA) decorated with TiO2 nano-particles was successfully fabricated by electrochemically anodizing titanium (Ti) foils followed by Ti-precursor post-treatment and annealing process. The TNA morphology characterized by SEM and TEM was found to be filled with TiO2 nano-particles interior and exterior of the TiO2 nano-tubes after titanium (IV) n-butoxide (TnB) treatment, whereas TiO2 nano-particles were only found inside of TiO2 nano-tubes upon titanium tetrachloride (TiCl4) treatment. The efficiency in TNA-based DSSCs was improved by both TnB and TiCl4 treatment presumably due to the increase of dye adsorption.     

染料敏化纳米晶TiO2太阳能电池研究进展

介绍了染料敏化太阳能电池的结构和工作原理,并对其各项组成要素如多孔纳米TiO2膜、光敏化染料、电解质等的研究进展进行了综述和探讨。并对染料敏化太阳能电池的应用进展、前景和今后的研究工作的重点进行了科学的论述。     

染料敏化纳米太阳能电池

本文介绍了染料敏化纳米太阳以电池的结构和原理,对纳米ＴｉＯ２膜、敏化染料、空穴传输材料的研究进展进行了综述。     

丝网印刷胶体组成中不同造孔剂对TiO2薄膜性能的影响

介绍了染料敏化太阳能电池中丝网印刷制备TiO2多孔薄膜的过程,论述胶体组成中具有造孔作用的PEG,H30,PS等化学物质对纳晶染料敏化太阳能电池中TiO2薄膜性能的影响,并详细阐述了三者造成影响的原因。     

Dye-sensitized solar cells based on a nanoparticle/nanotube bilayer structure and their equivalent circuit analysis

Dye-sensitized solar cells (DSSCs) were prepared by capitalizing on a TiO(2) bilayer structure composed of P-25 nanoparticles and freestanding crystalline nanotube arrays as photoanodes. After being subjected to sequential TiCl(4) treatment and O(2) plasma exposure, the bilayer photoanode was sensitized with N719 dye. DSSCs based on a 20 μm TiO(2) nanoparticle film solely and a bilayer of 13 μm TiO(2) nanoparticles and 7 μm TiO(2) nanotubes exhibited the highest power conversion efficiency, PCE, of 8.02% and 7.00%, respectively, compared to the devices made of different TiO(2) thicknesses. On the basis of J-V parameter analysis acquired by equivalent circuit model simulation, in comparison to P-25 nanoparticles, charge transport in nanotubes was found to be facilitated due to the presence of advantageous nanotubular structures, while photocurrent was reduced owing to their small surface area, which in turn resulted in low dye loading, as well as the lack of cooperative effect of anatase and rutile phases.     

Evaluations of physico-chemical properties of TiO2/clinoptilolite synthesized via three methods on photocatalytic degradation of crystal violet

Different preparation routes for Ti O_2-supported natural and synthetic clinoptilolite(Ti O_2/CP) composites were thoroughly investigated on the basis of sol–gel, hydrothermal, and in-situ hydrothermal methods.The micro-structural features and physicochemical properties of resultant Ti O_2/CPs were characterized via X-ray diffraction patterns, scanning(transmission) electron microscope images, Fourier transform infrared spectra, inductively coupled plasma-optical emission spectrometry methods, BET-isotherms,UV–visible spectra, and surface charge potential distributions. The results showed that in-situ hydrothermal method led to well dispersions of loaded-Ti O_2 particles on the surface of leaf-like CP, while obviously aggregated Ti O_2 on a relatively distorted structure of CP was obtained using sol–gel and hydrothermal methods. Their adsorptive and photocatalytic efficiencies for removal of crystal violet(CV) dye in aqueous solution were also explored under UV-irradiations. The results demonstrated that Ti O_2/CPs synthesized via sol–gel and in-situ hydrothermal methods presented the excellent performances with 98%removal efficiencies as compare to the bare commercial Ti O_2 which achieved 53% removal of CV dye.While, the in-situ hydrothermally synthesized Ti O_2/CPs were the best due to their moderate energy cost,highest adsorption capacities and removal efficiencies. Particularly, the synthetic CPs as supports exhibited synergetic photocatalytic activities for the degradation of CV dye, which is attributed to their high surface areas, better adsorption capability, and fine dispersion of Ti O_2 particles. Adsorption and degradation kinetics of CV dye were found to follow the pseudo-second and pseudo-first order models,respectively.