银/二氧化钛可见光催化自清洁织物的制备及其性能

为制备基于可见光光催化降解机制的自清洁织物,吡咯(Py)为单体,以硝酸银为银源,通过化学氧化聚合在商业化的纳米二氧化钛(TiO2 )表面形成聚吡咯掺杂银包覆层(PPy-Ag/ TiO2 ),然后高温焙烧去除PPy,获得可见光响应催化剂银/ 二氧化钛(Ag/ TiO2 )。通过共分散溶液用浸渍涂覆法将其涂覆到聚丙烯腈(PAN)纤维上,经加捻、合股织制成织物。借助扫描电子显微镜、红外光谱分析仪、热重分析仪、紫外可见分光光度计等测试织物的结构和性能。结果表明：Ag/ TiO2 粒子较均匀地负载到PAN 纤维表面,其负载率约为3. 17%;涂覆Ag/ TiO2 的织物对亚甲基蓝、罗丹明B 和红酒在可见光下具有良好的降解作用,表现出良好的自清洁效果;经多次洗涤后,该织物仍保持良好的光催化效果,具有良好的耐洗牢度。     

掺杂纳米TiO2棉织物的自清洁性能

采用氧化沉淀法,锌与TiO2的质量比为0.3%,制备了锌离子掺杂纳米TiO2光催化剂。掺杂纳米TiO2可使5 mg/L亚甲基蓝溶液在紫外光下达到56.75%的降解率,可见光下达到42.93%的降解率。将Zn2+/TiO2质量比为0.4%的掺杂纳米TiO2整理到棉织物上,表现出较强的自清洁性能。在紫外光或是可见光照射16 h后,棉织物上的辣椒油污渍基本完全分解。     

棉织物纳米TiO2溶胶自清洁功能整理工艺

采用溶胶-凝胶法,以Ti(OC4H9) 4为原料,在常压低温下合成纳米TiO2水溶胶,并应用于棉织物的自清洁整理。探索不同整理工艺对棉织物表面的纳米TiO2晶型、分散性和结晶度的影响,并利用XRD和SEM进行表征。结果表明,棉织物经浸轧烘-汽蒸整理工艺处理后,表面纳米TiO2粒子分散均匀,结晶强度高,对亚甲基蓝溶液的降解率可达88%以上,对红酒和咖啡等污渍自洁效果明显,且整理后织物的断裂强力无明显变化。     

二氧化钛水热改性涤/棉混纺织物的自清洁性能

为赋予涤/棉混纺织物光催化自清洁性能,基于水热合成技术,分别使用钛酸四丁酯、硫酸钛以及硫酸氧钛在涤/棉混纺织物表面负载纳米TiO₂颗粒,借助扫描电子显微镜、X射线衍射仪、傅里叶变换红外光谱仪、热重分析仪和紫外-可见光漫反射光谱仪等对TiO₂改性涤/棉混纺织物的结构和性能进行分析,比较了不同种类TiO₂前驱体改性涤/棉混纺织物可见光下降解污物的自清洁能力。结果表明:较钛酸四丁酯和硫酸钛改性的涤/棉混纺织物,硫酸氧钛改性涤/棉混纺织物接枝的锐钛矿型TiO₂颗粒多且尺寸小,光吸收能力增强,禁带宽度减小,其光催化自清洁性能优异,5次洗涤后自清洁性能没有明显减弱。     

改性纳米TiO2薄膜光催化降解染色废水

采用溶胶-凝胶法在玻璃表面制备均匀透明的纳米TiO2薄膜,并使用常压低温等离子体进行了表面改性,采用FE-SEM、XRD、UV-VIS、XPS分析了改性薄膜的表面特征.将其用于光催化降解Cibacron黄C-2R染色废水.试验表明,经过等离子体处理的纳米TiO2薄膜比未处理的纳米TiO2薄膜在光催化性能上有一定的提高,脱色率和COD去除率分别提高了11.71%和6.97%.     

Investigating the effect of corona treatment on self-cleaning property of finished cotton fabric with nano titanium dioxide

This research aims to create the durable self-cleaning property on cotton fabric using nano titanium dioxide and corona treatment as a dry and environmentally friendly process. In this regard, cotton fabrics were investigated under corona treatment with intensities of 2 and 3 A for 1, 3, and 5?min of irradiation. The treated samples with 0.1, 0.5, 1, and 1.5 on weight of bath percent were cured by nano titanium dioxide to obtain the highest self-cleaning property. The treated cotton fabrics, which were stained with direct green 6, were exposed to 20 and 400?W of UV radiation and their self-cleaning property was examined, and the results were reported. In addition, using corona treatment helped to stabilize the nano titanium dioxide on the cotton fabric surface even after 50 washing cycles. Through SEM images, Thermo Gravimetric Analysis plots, and XRD patterns, the presence of nano titanium dioxide on the surface of the treated cotton samples after washing was verified. Also, the tensile strengths of TiO₂-coated cotton fabrics were measured.     

纳米TiO2在水分散体系中的稳定性

研究pH值、不同离子性的表面活性剂和高分子分散剂聚乙烯吡咯烷酮对纳米二氧化钛水分散体系稳定性的影响。研究表明，体系pH值9时，溶胶最稳定；在等电点（pH值3．5）时，纳米微粒很快发生聚沉。阴离子表面活性剂达到一定浓度时，可提高溶胶的稳定性；阳离子表面活性剂在中性和碱性条件下，会破坏溶胶的稳定性，而当其偏酸性（pH值为5，但大于3．5）时，能提高胶体的稳定性；加入聚乙烯吡咯烷酮，可提高溶胶的稳定性。     

针织物纳米TiO2防紫外转移涂层

利用纳米TiO2的防紫外线性能,采用转移涂层技术将其涂覆于白色纯棉针织物上.试验表明,织物表面涂层含质量分数为0.8％的TiO2,就具有良好的防紫外线性能,且效果持久.经过测试,15次水洗,紫外线防护系数UPF仍大于50,UVA则小于5％,服用性能不受影响.     

改性TiO_2纳米线对棉织物的抗紫外及自清洁整理

利用自制的改性TiO_2纳米线对棉织物进行功能性整理,赋予棉织物抗紫外及自清洁性能。整理后的棉织物获得了较好的抗紫外性能和自清洁性能,UPF值可达77.21,紫外平均透过率TUVA为11.04%,TUVB为0.41%。在24 W紫外灯的照射下,滴有辣椒油的功能性棉织物在7 h内可实现自动清洁表面油污的功能,且由于改性TiO_2纳米线表面具有大量活性官能团,能以化学键的形式连接到纤维表面,使织物具有持久的耐洗性。     

磁控溅射法研制稀土激活TiO2抗菌材料

采用低温射频磁控溅射技术，以TiO2／Nd、Nd／TiO2、TiO2／Nd／TiO2三种方式，在PET非织造布表面沉积TiO2与稀土Nd相对含量不同的纳米结构复合薄膜，以宽化纳米TiO2的吸收光谱，使其在可见光下也能具有较好的抗菌效果。采用振荡烧瓶法对样品进行抗菌性能测试，并选用大肠杆菌为试验菌种，结果表明，以TiO2／Nd／TiO2的沉积方式，在TiO2薄膜中掺杂一定量的稀土元素Nd，可以有效提高纳米结构复合薄膜的抗菌性能。     

纳米SnO2/TiO2/MMT制备及其光催化性能

比较不同制备方法制得的复合催化剂,由超临界干燥法制备的光催化剂具有粒径小,分散性好,光催化活性高等特点.以TiCl4为原料,采用溶胶凝胶法结合超临界流体干燥法(SCFD)制备了纳米级SnO2TiO2/MMT(蒙脱土)复合光催化剂.采用XRD和TEM对样品进行了表征.结果表明:TiO2以锐钛矿型形式存在,催化剂粒径在13～20 nm.以活性红X-3B溶液、活性橙K-NG和活性紫X-2R为反应模型,对所得催化剂的催化活性进行了评价,降解率分别达到99.9％、99.6％和99.5％,化剂循环利用时仍具有较高的催化活性.     

TiO2纳米材料防紫外线涂层整理

采用TiO2纳米溶胶与增稠剂混配制成防紫外线涂层剂，并对棉织物进行涂层，通过对织物性能分析测试，比较了不同增稠剂制备的涂层剂外观颜色、粘度以及涂层效果，发现A邦浆的效果较好；TiO2纳米涂层胶的浓度视织物厚薄而定，一般为0．04～0．15mol／L，涂层织物的耐洗涤性、手感、白度和强力均较好。     

负载银纳米TiO2光催化活性染色废水的脱色

采用负载银纳米TiO2光催化对活性艳红K-2BP染料废水脱色，分析了不同光照时间、不同染料浓度、不同pH值下的光催化脱色效果。试验结果表明，负载银纳米TiO2对活性艳红K-2BP染料废水的光催化是可行的；低浓度染色废水的脱色率较高；pH值对光催化脱色影响很大。     

棉织物的纳米TiO2溶胶在抗紫外整理

采用钛醇盐为前驱体，利用溶胶-凝胶技术制得0．016、0．033、0．33mol/L纳米TiO2水溶胶，其粒径为20～50nm。以该溶胶对白色纯棉布进行整理，可取得良好的抗紫外效果，且效果持久，水洗20次后UPF值等级仍为50＋。     

超临界二氧化碳用于防污自洁膜材表层的制备

本文阐述了建筑膜材的结构和具有防污自洁功能膜材表面的结构特点;介绍了超临界二氧化碳流体的性能;详述了超临界二氧化碳制备防污自洁膜材表层的两种方法,并就膜材表层防污自洁效果的测试方法进行了介绍。超临界二氧化碳用于制备具有防污自洁功能的膜材表层符合低碳经济的要求,其研究和推广具有重要的环保意义。     

金属共掺杂纳米TiO2对甲基橙的催化降解

以硫酸钛、CoCl2·6H2O和FeCl3为原料,采用共沉淀法制备了掺杂不同量Co2+和e3+的TiO2纳米粒,通过X-射线衍射(XRD)、差热-热重(TG-DTA)和紫外-可见吸收光谱(UV-Vis)等分析手段对样品的晶体类型、光谱吸收特征进行了表征.结果表明,金属共掺杂TiO2纳米粒仍以锐钛矿相存在,粒子的粒径约为12 nm;Co2+和Fe3+掺入TiO2后,主要以替代的方式占据TiO2晶格中Ti4+的位置,并在TiO2禁带中产生掺杂能级,使原来位于380 nm的吸收带边红移至460 nm.以太阳光为光源,当Co2+掺杂量为0.025%,Fe3+掺杂量小于0.05%时,光催化剂TiO2的活性较高,对甲基橙的降解率接近100%.     

纳米二氧化钛整理织物的自清洁和抗菌性能探讨

将TiO2以不同用量涂覆在白色涤纶针刺无纺布和灰色高支贡丝锦毛织物表面,以光合细菌为目标,采用观察和稀释培养计数法（MPN）探讨了TiO2处理织物的自清洁性和抗菌性,结果表明,经过TiO2涂层的白色涤纶针刺无纺布随着TiO2用量的增加和时间的延长,其表面滴上的紫红色光合细菌菌液斑迹逐渐变小变浅,呈现出良好的自清洁性和抗菌性;经TiO2涂层的高支贡丝锦毛织物随着TiO2用量的增加,其灭菌率增大,具有明显的抗菌性。     

Proteases pretreatment on wool to enhance durable antimicrobial and UV protection with nano TiO2 and polycarboxylic acids using RSM

In this research, protease pretreated wool fabric (PWF) was treated with butane tetra carboxylic acid (BTCA), citric acid (CA), and nano TiO₂ (NTO) to produce fabric with enhanced durable antimicrobial and ultraviolet (UV) protection properties. However, treatment of proteases enzymatic wool with NTO/CA/BTCA has not been informed. The NTO particles were stabilized on the enzymatic wool surface using CA/BTCA cross-linking agents. In order to create optimum UV protection (UP) based on (ΔE^?) and bacteria reduction against gram-positive and gram-negative bacteria, the appropriate models were obtained based on Design-Expert software. The roles of CA, BTCA, and NTO concentrations in UP and antimicrobial properties of the PWF were investigated using response surface methodology. Overall, the protease pretreatment of the wool fabrics made the improvement of the antimicrobial activity against Staphylococcus aureus and Escherichia coli bacteria, and also caused the remarkable enhancement of UP properties as compared with control samples. Also, reflectance spectra analyses (200–400?nm) and scanning electron microscopy were employed to confirm the NTO particles on the pretreated wool surface.     

纳米TiO2光催化氧化处理直接耐晒翠蓝染色废液

采用纳米级TiO2悬浮法光催化氧化处理直接耐晒翠蓝染液，讨论pH值、催化剂用量、染料浓度和脱色时间等因素对脱色与降解的影响。试验发现，纳米TiO2对染料的脱色效率高，降解彻底，是一种很有前途的印染废水处理方法。     

In situ synthesis and exhaustion of nano TiO2 on fabric samples using laser ablation method

Abstract

In this research work, TiO₂ nanoparticles were in situ synthesized on cotton fabrics using laser ablation method. For producing the TiO₂ nanoparticles, the Ti plate were irradiated with Nd:YAG pulsed laser operating at 1064?nm in deionized water medium. Simultaneously, the cotton samples were placed near Ti plate in ablation container. Laser fluence was 1, 2 and 3?J/cm² for samples 1–3 to make nanoparticles with different sizes. The morphology and size of prepared nano particles were investigated using scanning electron microscope (SEM) and transmition electron microscope (TEM). The concentration, structure and crystalinity of synthesized nano TiO₂ was studied using absorption spectrophotometry and X-Ray diffraction method. The morphology changes of cotton samples after laser ablation and in situ synthesizing the TiO₂ nanoparticles was compared using SEM. The hydrophilicity changes of cotton were determined by water absorption time method. Finally the cotton samples were stained by one ml of diluted methylene blue and the color changes of samples after daylight irradiation were studied with reflective spectrophotometry. Results show that, by increasing the laser fluence, the concentration and size of synthesized TiO₂ nano particles increases. The self-cleaning and photocatalytic activity increases by increasing the concentration of TiO₂ nanoparticles.