TiO2

摘要： TiO_(2)纳米材料是TiO_(2)经过纳米技术处理过的高级金属氧化物光催化剂,同时也是一种被广泛研究在水处理中的半导材料,在工业中的物理研究价值极高。TiO_(2)纳米材料是近现代新兴起来的一种光催化剂,因为它在化合反应中氧化性强,并且又耐化学腐蚀性,催化活性也相对较高,所以在生活和工业中常利用光来活化TiO_(2),使其产生氧化还原作用,将光能转化成电能和化学能,对房屋装修进行杀菌及处理工业废水,较少产生对环境的污染。还可利用氧化性强的特点来氧化还原它附近附着的物质,进行杀菌和清除污染物。近年来,国家也出台相应的政策和措施对环境进行保护,TiO_(2)以其无毒无害性、化学催化稳定性高、催化剂的物质形态可控、光源被催化活性强等优点得到了各应用技术行业的持续关注。文章主要分析目前关于纳米TiO_(2)光催化性能运用原理和特点,以及对提高TiO_(2)纳米材料光催化性能的创新研究。

摘要： 基于修饰的高分子网络凝胶法,通过简单的工艺流程制备出高效的ZnO/TiO_(2)纳米复合光催化剂,并调节复合物中成分的比例优化了光催化剂的性能。研究结果发现,微量的TiO_(2)添加和高浓度TiO_(2)复合均改善了颗粒状ZnO纳米光催化剂的催化活性,它们在模拟太阳光照下对甲基橙的降解效率更高,增强的性能分别归因于表面氧空位缺陷增多和多元异质结结构增强的界面电荷转移引起的高光生电子-空穴分离率。此外,ZnO和TiO_(2)对亚甲基蓝和甲基橙的光催化降解存在一定的选择性,这与催化剂表面带电性和污染物分子的离子性有关。抑制剂实验表明催化剂表面形成的活性物种羟基自由基、超氧自由基和光生空穴均参与亚甲基蓝和甲基橙的降解反应,在甲基橙的降解反应中超氧自由基起主导作用。循环实验证实所制备的光催化剂具有较高的稳定性。为探索可能的实际应用,进一步研究了催化剂用量和污染物溶液的pH值对催化剂的光催化性能的影响。结果表明,催化剂用量的增加为污染物分子和入射光提供了更多的活性位点,提高了污染物降解效率;因碱性溶液含高浓度强氧化性的羟基自由基,催化剂在碱性环境中光降解污染物的效率明显提高。

摘要： 介绍了常用的TiO_(2)光催化剂载体以及将TiO_(2)与载体耦合的负载技术,综述了负载型TiO_(2)光催化剂的常见掺杂改性方法和与其他技术诸如电化学、微波、膜分离技术的联用,最后对负载型TiO_(2)的现存问题进行了总结。

摘要： 采用TiO_(2)/ITO光电极研究了不同光照方式对有机污染物光电催化降解的影响,通过光强测试解析了有机污染物物降解过程及有机污染物的空穴清除能力。结果表明:与正光照射相比,背光照射光电催化降解苯酚、腐植酸和酸性橙的速率分别提升了16.19%、26.09%和38.87%;正光照射时,光经过溶液导致的光强损失减弱了光阳极表面光照强度,从而降低了催化效率;背光照射对有机污染物降解效率提升的程度与有机污染物吸收光的能力呈正相关关系;由于背光照射避免了光经过溶液造成的光强损失,提高了空穴捕获能力,相较于没有污染物的条件产生了更大的光电流。

摘要： 本文利用脉冲激光沉积技术在LaAlO;(001)衬底上生长了单晶锐钛矿和双相TiO_(2)薄膜,并利用X射线衍射和透射电子显微术对薄膜的显微结构进行了系统表征。单晶锐钛矿薄膜在LaAlO;(001)衬底上实现了外延生长,双相TiO_(2)薄膜以单晶锐钛矿TiO_(2)为基体,在其中夹杂着金红石TiO_(2)颗粒。TiO_(2)薄膜的相结构可通过调整靶材与衬底的间距来调控,远靶基距(150 mm)利于单晶锐钛矿薄膜生长,近靶基距(50 mm)易获得双相TiO_(2)薄膜。锐钛矿TiO_(2)电镜样品在离子减薄过程中易发生表面还原,导致电镜观察中出现莫尔条纹。研究表明30%H_(2)O_(2)浸泡可有效去除离子减薄样品表面的损伤层,防止莫尔条纹的出现。

摘要： In this work,a covalent organic framework(COF),which is constructed by the building blocks of[5,10,15,20-tetrakis(4-aminophenyl)porphinato]copper(Ⅱ)(CuTAPP)and p-benzaldehyde,is employed to integrate with TiO_(2) for the purpose of establishing a Z-scheme hybrid.Within the system,isonicotinic acid performs the role of a bridge that connects the two components through a coordination bond.Further photocatalytic application reveals the hybrid framework is able to catalyze CO_(2) conversion under simulated solar light,resulting in CO production rate of 50.5 μmol g^(-1)·h^(-1),about 9.9 and 24.5 times that of COF and pristine TiO_(2),respectively.The ameliorated catalytic performance owes much to the por-phyrin block acting as photosensitizer that augments the light absorbance,and the establishment of Z-scheme system between the inorganic and orga nic comp on ents that enhances the separati on of the carriers.In addition,the chemical bridge also ensures a steady usage and stable charge delivery in the catalysis.Our study sheds light on the development of versatile approaches to covalently in corporate COFs with inorga nic semic on ductors.

摘要： 研究了钛矿渣作水泥混合材时某水泥厂电耗偏高的原因以及钛矿渣对水泥强度和强度增长率的影响。研究表明,水泥厂钛矿渣中TiO_(2)含量高达12.76%,导致钛矿渣活性较低;钛矿渣易磨性差是水泥厂电耗偏高的主要原因。普通矿渣和钛矿渣在相同比表面积情况下,钛矿渣对水泥的早期强度影响不大,对后期强度影响明显;在不同比表面积情况下,随着比表面积的增加,普通矿渣和钛矿渣的活性都会增加,而普通矿渣28d活性增加更加明显,钛矿渣28d活性虽然有一定增加,但不明显。

摘要： 以模拟含苯酚污水为研究对象,开展石墨烯-二氧化钛复合材料光催化处理水中苯酚的实验。采用改良Hummers氧化法、溶胶凝胶法、水热法制备了r GO/TiO_(2)复合材料,并对材料进行SEM、XRD表征。探究了苯酚质量浓度、r GO/TiO_(2)复合比,r GO/TiO_(2)投入量,光照时间对r GO/TiO_(2)去除苯酚的影响,结果表明,r GO/TiO_(2)复合材料在苯酚质量浓度为5 mg·L^(-1)、复合比r为0.05、光照10 h、投入质量为0.2 g时,对水中苯酚的去除率最高,达到94.16%,处理效果较好。

摘要： 采用化学氧化法,以过硫酸铵为氧化剂制备聚苯胺与二氧化钛(TiO_(2))的复合催化材料,并对复合材料进行表征,发现复合效果较好。同时实验研究发现,采用该复合材料对30 mg/L的甲基橙模拟废水进行自然光催化降解,当TiO_(2)和苯胺摩尔比为10:1,甲基橙废水的降解效果最优,同时讨论了pH值和投加量对降解效果的影响,发现pH=3,投加量为0.5 g/L时,2 h降解率可达80.67%,反应速率比纯TiO_(2)提高了一倍。

摘要： 为避免粉状光催化剂的团聚和流失,提高其回收率,通过溶胶-凝胶法+焙烧法制备小沙粒/TiO_(2)光催化剂。通过SEM和XRD等对材料的形貌和晶型进行分析和测试,并用亚甲基蓝降解实验考察其光催化活性。结果表明,TiO_(2)质量分数12%时,光催化效果最好。紫外光作用20 min时,亚甲基蓝降解率达98.77%。制备的光催化剂具有良好的光学稳定性。

摘要： PCBs 具有强疏水性、稳定性、抗生物降解性和“三致”效应，能长期稳定存在于环境中，并可通过食物链富集，进而影响人类身体健康。PCBs 土壤污染在我国已有相当大的面积。TiO2光催化技术是一种很有发展前途的绿色环保处理污染物的技术，能够很好的降解环境中的大多数有机物。本文选择了PCB3 为目标物，研究了不同助溶剂、不同浓度的HPCD 表面活性剂（Tween80，Brij35）对PCB3的光催化降解过程影响，并分析了其降解途径。

摘要： PCBs 具有强疏水性、稳定性、抗生物降解性和“三致”效应，能长期稳定存在于环境中，并可通过食物链富集，进而影响人类身体健康。PCBs 土壤污染在我国已有相当大的面积。TiO2光催化技术是一种很有发展前途的绿色环保处理污染物的技术，能够很好的降解环境中的大多数有机物。本文选择了PCB3 为目标物，研究了不同助溶剂、不同浓度的HPCD 表面活性剂（Tween80，Brij35）对PCB3的光催化降解过程影响，并分析了其降解途径。

摘要： PCBs 具有强疏水性、稳定性、抗生物降解性和“三致”效应，能长期稳定存在于环境中，并可通过食物链富集，进而影响人类身体健康。PCBs 土壤污染在我国已有相当大的面积。TiO2光催化技术是一种很有发展前途的绿色环保处理污染物的技术，能够很好的降解环境中的大多数有机物。本文选择了PCB3 为目标物，研究了不同助溶剂、不同浓度的HPCD 表面活性剂（Tween80，Brij35）对PCB3的光催化降解过程影响，并分析了其降解途径。

摘要： PCBs 具有强疏水性、稳定性、抗生物降解性和“三致”效应，能长期稳定存在于环境中，并可通过食物链富集，进而影响人类身体健康。PCBs 土壤污染在我国已有相当大的面积。TiO2光催化技术是一种很有发展前途的绿色环保处理污染物的技术，能够很好的降解环境中的大多数有机物。本文选择了PCB3 为目标物，研究了不同助溶剂、不同浓度的HPCD 表面活性剂（Tween80，Brij35）对PCB3的光催化降解过程影响，并分析了其降解途径。

摘要： In this work, monolithic functional ceramic membrane was fabricated, and evaluated usingintegrated ozonation and ultrafitration. The initial TiO2/Al2O3composite membrane was prepared byassembling TiO2nanorods, which grew through calcination from rutile TiO2powders, on Al2O3supportlayer. Then the mesoporous Ti-Mn mixed oxide was loaded on the composite membrane by a simplevacuum dip-coating process. According to the images of scanning electron microscope (SEM) andtransmission electron microscopy (TEM), the thickness of Ti-Mn layer was about 100nm, which coateduniformly on the surface of micro particles in the composite membrane. The result of integrated ozonationand ultrafiltration test indicated that catalytic ozonation played a important role in the process and broughtout an enhancement of recovery of the permeate flux and CODCr, color and aniline removal, meanwhile,the influent with CODCrbelow 200 mg/L could be effectively handled to meet the requirement of waterreclamation (CODCr＜60 mg/L). Consequently, this kind of monolithic functional membrane with themultifunctions including catalytic ozonation, separation and anti-fouling has potential application in waterproduction and wastewater treatment processes.

摘要： In this work, monolithic functional ceramic membrane was fabricated, and evaluated usingintegrated ozonation and ultrafitration. The initial TiO2/Al2O3composite membrane was prepared byassembling TiO2nanorods, which grew through calcination from rutile TiO2powders, on Al2O3supportlayer. Then the mesoporous Ti-Mn mixed oxide was loaded on the composite membrane by a simplevacuum dip-coating process. According to the images of scanning electron microscope (SEM) andtransmission electron microscopy (TEM), the thickness of Ti-Mn layer was about 100nm, which coateduniformly on the surface of micro particles in the composite membrane. The result of integrated ozonationand ultrafiltration test indicated that catalytic ozonation played a important role in the process and broughtout an enhancement of recovery of the permeate flux and CODCr, color and aniline removal, meanwhile,the influent with CODCrbelow 200 mg/L could be effectively handled to meet the requirement of waterreclamation (CODCr＜60 mg/L). Consequently, this kind of monolithic functional membrane with themultifunctions including catalytic ozonation, separation and anti-fouling has potential application in waterproduction and wastewater treatment processes.

摘要： In this work, monolithic functional ceramic membrane was fabricated, and evaluated usingintegrated ozonation and ultrafitration. The initial TiO2/Al2O3composite membrane was prepared byassembling TiO2nanorods, which grew through calcination from rutile TiO2powders, on Al2O3supportlayer. Then the mesoporous Ti-Mn mixed oxide was loaded on the composite membrane by a simplevacuum dip-coating process. According to the images of scanning electron microscope (SEM) andtransmission electron microscopy (TEM), the thickness of Ti-Mn layer was about 100nm, which coateduniformly on the surface of micro particles in the composite membrane. The result of integrated ozonationand ultrafiltration test indicated that catalytic ozonation played a important role in the process and broughtout an enhancement of recovery of the permeate flux and CODCr, color and aniline removal, meanwhile,the influent with CODCrbelow 200 mg/L could be effectively handled to meet the requirement of waterreclamation (CODCr＜60 mg/L). Consequently, this kind of monolithic functional membrane with themultifunctions including catalytic ozonation, separation and anti-fouling has potential application in waterproduction and wastewater treatment processes.

摘要： In this work, monolithic functional ceramic membrane was fabricated, and evaluated usingintegrated ozonation and ultrafitration. The initial TiO2/Al2O3composite membrane was prepared byassembling TiO2nanorods, which grew through calcination from rutile TiO2powders, on Al2O3supportlayer. Then the mesoporous Ti-Mn mixed oxide was loaded on the composite membrane by a simplevacuum dip-coating process. According to the images of scanning electron microscope (SEM) andtransmission electron microscopy (TEM), the thickness of Ti-Mn layer was about 100nm, which coateduniformly on the surface of micro particles in the composite membrane. The result of integrated ozonationand ultrafiltration test indicated that catalytic ozonation played a important role in the process and broughtout an enhancement of recovery of the permeate flux and CODCr, color and aniline removal, meanwhile,the influent with CODCrbelow 200 mg/L could be effectively handled to meet the requirement of waterreclamation (CODCr＜60 mg/L). Consequently, this kind of monolithic functional membrane with themultifunctions including catalytic ozonation, separation and anti-fouling has potential application in waterproduction and wastewater treatment processes.

摘要： In this work, monolithic functional ceramic membrane was fabricated, and evaluated usingintegrated ozonation and ultrafitration. The initial TiO2/Al2O3composite membrane was prepared byassembling TiO2nanorods, which grew through calcination from rutile TiO2powders, on Al2O3supportlayer. Then the mesoporous Ti-Mn mixed oxide was loaded on the composite membrane by a simplevacuum dip-coating process. According to the images of scanning electron microscope (SEM) andtransmission electron microscopy (TEM), the thickness of Ti-Mn layer was about 100nm, which coateduniformly on the surface of micro particles in the composite membrane. The result of integrated ozonationand ultrafiltration test indicated that catalytic ozonation played a important role in the process and broughtout an enhancement of recovery of the permeate flux and CODCr, color and aniline removal, meanwhile,the influent with CODCrbelow 200 mg/L could be effectively handled to meet the requirement of waterreclamation (CODCr＜60 mg/L). Consequently, this kind of monolithic functional membrane with themultifunctions including catalytic ozonation, separation and anti-fouling has potential application in waterproduction and wastewater treatment processes.

摘要： 本文首先利用Ce (NO3 ) 3 为前躯体，通过氧化、碱化过程制备了CeO2 纳米 粒子。然后通过溶胶-凝胶法，合成了具有核壳结构的CeO2/TiO2纳米复合物。测 试结果表明，纳米复合物由锐钛矿相的TiO2和立方晶相的CeO2 构成。利用Nafion 作粘结剂，将CeO2/TiO2纳米复合物修饰在玻碳电极表面，采用循环伏安扫描方 式，测定了该纳米复合物的电化学发光（ECL）行为，探讨了电化学参数及电解 质溶液对ECL 响应的影响，以及ECL 产生机理。实验结果表明，在K2S2O8 介 质中，CeO2/TiO2纳米复合物可以产生强度很大的ECL 双峰，该双峰一个是与电 极过程有关的ECL 峰，一个是与电极过程无关的化学发光峰。

摘要： 本发明涉及介孔二氧化钛及其SO42-/TiO2固体超强酸制备方法及SO42-/TiO2固体超强酸。该方法以工业硫酸钛液为原料，经分步水解得介孔偏钛酸，偏钛酸经水洗后分离，干燥、焙烧得介孔二氧化钛；或水洗时控制偏钛酸中Fe2+及SO42-含量，分离、干燥、焙烧得介孔SO42-/TiO2固体超强酸。本发明所得介孔二氧化钛小角X射线衍射谱图如图2所示，其比表面积150～200m2/g，并具有良好的热稳定性；所得介孔SO42-/TiO2固体超强酸属掺铁的SO42-/TiO2型，硫含量1～8%，铁含量0.02～3%，孔径2～8nm，比表面积约200m2/g，以酯化反应为目标反应，显示出良好的催化活性。

摘要： 本发明涉及二氯二茂钛裂解一步制备TiO

摘要： 本发明公开了一种乙二胺四乙酸二钠辅助水热合成纳米多孔TiO

摘要： SiO

摘要： 本发明涉及介孔二氧化钛及其SO42－/TiO2固体超强酸制备方法及SO42－/TiO2固体超强酸。该方法以工业硫酸钛液为原料，经分步水解得介孔偏钛酸，偏钛酸经水洗后分离，干燥、焙烧得介孔二氧化钛；或水洗时控制偏钛酸中Fe2+及SO42－含量，分离、干燥、焙烧得介孔SO42－/TiO2固体超强酸。本发明所得介孔二氧化钛小角X射线衍射谱图如图2所示，其比表面积150～200m2/g，并具有良好的热稳定性；所得介孔SO42－/TiO2固体超强酸属掺铁的SO42－/TiO2型，硫含量1～8％，铁含量0.02～3％，孔径2～8nm，比表面积约200m2/g，以酯化反应为目标反应，显示出良好的催化活性。

摘要： 本发明涉及二氯二茂钛裂解一步制备TiO

摘要： 一种用于碳酸二甲酯与苯酚酯交换合成碳酸二苯酯的TiO

摘要： 本发明公开了一种乙二胺四乙酸二钠辅助水热合成纳米多孔TiO

摘要： 本发明属于肿瘤治疗应用技术领域，公开了一种二维Ti3C2/TiO2纳米材料及其在肿瘤治疗方面的应用，本发明通过简单的方法合成二维Ti3C2/TiO2异质结构纳米材料，获得的二维Ti3C2/TiO2异质结构纳米材料尺寸在200～300nm，其中，TiO2的尺寸为50～100nm，本发明探究了Ti3C2/TiO2不同条件下光热治疗及声动力的对肿瘤细胞的杀伤效果。用CCK8实验检测处理后细胞的存活率，表明药物孵育后经激光和超声处理均能杀伤细胞，而激光加超声共同处理的杀伤效果最明显，有效抑制90％以上的肿瘤细胞。

摘要： 本发明公开了一种具有连续二维纳米片结构的TiO2材料的制备方法，包括：将钛源和有机溶剂混合均匀，在180‑220°C下溶剂热反应12‑24h，得到具有特殊空心结构的TiO2微米球；所述有机溶剂由乙酸和乙腈按体积比1：(1‑4)组成。本发明还公开了具有连续二维纳米片结构的TiO2材料。本发明通过简便的溶剂热方法制备具有连续二维纳米片结构的TiO2材料，具有反应条件温和、工艺简单，可控性强、且重现性好的优点，制得的TiO2材料在太阳电池、离子电池、光催化等领域具有广泛的应用。