CN108442100B - 一种负载纳米TiO2并具有光催化能力织物的制备方法 - Google Patents
一种负载纳米TiO2并具有光催化能力织物的制备方法 Download PDFInfo
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Abstract
本发明公开了一种负载纳米TiO2并具有光催化能力织物的制备方法,该方法利用导电聚合物和纳米TiO2形成混合溶液,再过浸渍、浸轧、喷涂或其他混合方式将导电聚合物‑纳米TiO2混合溶液附于干净织物上,干燥后再用水洗除去多余的导电聚合物和纳米TiO2,再干燥得到负载纳米TiO2并具有光催化能力织物。本发明制备织物具有良好的光催化降解水、空气污染物的能力,同时可以提高织物的自清洁性能、防紫外性能、抗菌性能、抗静电性能和吸湿性能。
Description
技术领域
本发明涉及一种负载纳米TiO2并具有光催化能力织物的制备方法,属于光催化材料技术领域。
背景技术
环境问题如水污染、空气污染已成为人们关注焦点之一,如何有效的控制和治理各种污染物对环境的污染是环境治理中的重点。针对这些环境问题,研究者们开发出了多种方法用于污染物的处理,其中光催化技术受到了重点关注。光催化技术是借助光催化剂可以在太阳辐射下在水中产生高氧化活性物种,使有机污染物降解的技术。因此,光催化技术是一种简单、环保的解决水污染、空气污染问题的方法。在众多光催化剂中,纳米二氧化钛(TiO2)因其具有高效、无毒、化学性质稳定等优点,使其成为一种具有大规模应用潜力的光催化剂。然而,纳米TiO2的使用中常常存在两个问题:一是由于纳米TiO2粒子难于从水介质分离,从而限制了纳米TiO2催化剂难以循环利用,限制了其在实际污染物处理工艺中的应用;另一是纳米TiO2在光的激发下产生的电子与空穴容易复合,量子效率低,导致其实际降解能力下降。
正对上述问题,研究者采用了多种催化剂的负载物负载纳米TiO2,如活性炭,使其容易回收重复利用;也采用了多种材料如碳纳米管转移光生电子,减少电子与空穴的复合,以提高降解能力,但发现,目前的负载物负载纳米TiO2工艺较复杂,使用的电子转移材料较为昂贵。
发明内容
为解决现有技术的不足,本发明的目的在于为了获得负载纳米TiO2并具有光催化能力织物材料,本发明提出一种负载纳米TiO2并具有光催化能力织物的制备方法。
为了实现上述目标,本发明采用如下的技术方案:
一种负载纳米TiO2并具有光催化能力织物的制备方法,包括以下制备步骤:
S1、将导电聚合物溶于少量有机溶剂中,得到导电聚合物溶液,导电聚合物在溶液中的质量分数为5~90%;
S2、在导电聚合物溶液中逐滴加入水并通入CO2,使溶液中的导电聚合物溶于水中,得到导电聚合物水溶液;
S3、在导电聚合物水溶液中加入纳米TiO2,进行超声分散处理,得到导电聚合物-纳米TiO2混合溶液;
S4、将导电聚合物-纳米TiO2混合溶液附于织物上,干燥后除去多余的导电聚合物和纳米TiO2,然后再次干燥处理,得到负载纳米TiO2并具有光催化能力织物。
优选地,前述步骤S1中,导电聚合物为含叔胺基聚噻吩衍生物,其结构通式为:
再优选地,前述步骤S1中,有机溶剂为二氯甲烷、三氯甲烷、N,N-二甲基甲酰胺、四氢呋喃、二氧六环和二甲基亚砜中的一种或多种。
更优选地,前述步骤S2中,导电聚合物溶液中的导电聚合物溶于水中,是通过通入CO2使聚噻吩衍生物中的叔胺基质子化,将聚噻吩衍生物由疏水性转变为亲水性,导电聚合物水溶液中导电聚合物的质量分数为0.1~90%。
进一步优选地,前述步骤S3中,纳米TiO2的直径为5~200nm,在导电聚合物-纳米TiO2混合溶液中,导电聚合物和纳米TiO2的质量比为(100:1)~(1:100),导电聚合物和纳米TiO2在水溶液中的质量分数为0.1~90%。
具体地,前述步骤S4中,织物的材质为涤纶、锦纶、腈纶、丙纶、氨纶、尼龙或其混纺织物,在织物使用之前,首先用洗衣粉水溶液洗涤其表面的灰尘和油污,并用清水冲洗干净,干燥待用。
优选地,前述步骤S4中,将导电聚合物-纳米TiO2混合溶液附于织物上是通过浸渍、浸轧、喷涂或其他混合方式实现的。
再优选地,前述步骤S4中,两次干燥处理方式均是自然挥发干燥、真空干燥、冷冻干燥、烘箱干燥、红外加热、微波加热的一种或多种,对附有导电聚合物和纳米TiO2织物进行干燥处理的温度为-60~200℃。
更优选地,前述步骤S4中,除去多余的导电聚合物和纳米TiO2是通过水洗方法实现的。
进一步优选地,前述步骤S4中,通过在织物上重复附着导电聚合物-纳米 TiO2混合溶液,再分别进行干燥-清水洗涤-干燥处理过程1-10次,以得到不同纳米TiO2负载量织物。
本发明的有益之处在于:
(1)本发明的工艺过程操作简单、成本低廉,能够适应大规模实际生产;
(2)本发明所使用的导电聚合物能在CO2的作用下,由疏水变为亲水,再通过干燥除去CO2,导电聚合物能稳定吸附于织物上,并能转移光生电子,提高催化效果;
(3)本发明制备的负载纳米TiO2并具有光催化能力织物,可快速实现对污染物的降解,适用于污水处理,尤其可作为窗帘的制品实现室内空气净化,除去家装、油漆等残留有害气体物质;
(4)本发明所制备的负载纳米TiO2并具有光催化能力织物,表现出了良好的重复使用性,同时可以提高织物的自清洁性能、防紫外性能、抗菌性能、抗静电性能和吸湿性能。
附图说明
图1是本发明的制备工艺流程图;
图2是本发明中负载纳米TiO2在腈纶上的扫描电镜图;
图3是本发明中负载纳米TiO2的涤纶织物对不同浓度R6G光催化降解的曲线图。
具体实施方式
以下结合附图和具体实施例对本发明作具体的介绍。
实施例1:
一种负载纳米TiO2并具有光催化能力织物的制备方法,包括以下制备步骤:
S1、将0.5g导电聚合物溶于定量的二氯甲烷中,得到导电聚合物溶液,导电聚合物在溶液中的质量分数为20%;
S2、在导电聚合物溶液中逐滴加入5mL水并通入CO2,使溶液中的导电聚合物溶于水中,得到导电聚合物水溶液;
S3、在导电聚合物水溶液中加入0.5g纳米TiO2,纳米TiO2的直径为5nm,进行超声分散10min,得到导电聚合物-纳米TiO2混合溶液;
S4、将3cm2的尼龙布浸入导电聚合物-纳米TiO2混合溶液中,浸渍10min,将导电聚合物-纳米TiO2混合溶液附于尼龙布上,40℃烘箱干燥后再用清水洗除去多余的导电聚合物和纳米TiO2,再40℃烘箱干燥得到负载纳米TiO2的尼龙布。
实施例2:
一种负载纳米TiO2并具有光催化能力织物的制备方法,包括以下制备步骤:
S1、将1g导电聚合物溶于定量的三氯甲烷中,得到导电聚合物溶液,导电聚合物在溶液中的质量分数为5%;
S2、在导电聚合物溶液中逐滴加入20mL水并通入CO2,使溶液中的导电聚合物溶于水中,得到导电聚合物水溶液;
S3、在导电聚合物水溶液中加入0.1g纳米TiO2,纳米TiO2的直径为20nm,进行超声分散5min,得到导电聚合物-纳米TiO2混合溶液;
S4、将导电聚合物-纳米TiO2混合溶液通过浸轧的方法附于涤纶布上,60℃烘箱干燥,再用清水洗除去多余的导电聚合物和纳米TiO2,再60℃烘箱干燥得到负载纳米TiO2的涤纶布。
实施例3:
一种负载纳米TiO2并具有光催化能力织物的制备方法,包括以下制备步骤:
S1、将2g导电聚合物溶于定量的二甲基亚砜中,得到导电聚合物溶液,导电聚合物在溶液中的质量分数为90%;
S2、在导电聚合物溶液中逐滴加入30mL水并通入CO2,使溶液中的导电聚合物溶于水中,得到导电聚合物水溶液;
S3、在导电聚合物水溶液中加入3g纳米TiO2,纳米TiO2的直径为100nm,进行超声分散1min,得到导电聚合物-纳米TiO2混合溶液;
S4、通过喷涂的方法,将导电聚合物-纳米TiO2混合溶液喷涂于锦纶上,50℃红外加热干燥,再用清水洗除去多余的导电聚合物和纳米TiO2,再50℃红外加热干燥得到负载纳米TiO2的锦纶布。
实施例4:
一种负载纳米TiO2并具有光催化能力织物的制备方法,包括以下制备步骤:
S1、将0.5g导电聚合物溶于定量的二氧六环中,得到导电聚合物溶液,导电聚合物在溶液中的质量分数为40%;
S2、在导电聚合物溶液中逐滴加入15mL水并通入CO2,使溶液中的导电聚合物溶于水中,得到导电聚合物水溶液;
S3、在导电聚合物水溶液中加入0.3g纳米TiO2,纳米TiO2的直径为200nm,进行超声分散5min,得到导电聚合物-纳米TiO2混合溶液;
S4、将3cm2的腈纶布浸入导电聚合物和纳米TiO2混合溶液中,浸渍10min,将导电聚合物-纳米TiO2混合溶液附于腈纶布上,自然挥发干燥后再用清水洗除去多余的导电聚合物和纳米TiO2,再自然挥发干燥;重复浸渍-干燥-洗涤-干燥过程3次,得到负载纳米TiO2的腈纶布。
实施例5:
一种负载纳米TiO2并具有光催化能力织物的制备方法,包括以下制备步骤:
S1、将0.2g导电聚合物溶于定量的N,N-二甲基甲酰胺中,得到导电聚合物溶液,导电聚合物在溶液中的质量分数为80%;
S2、在导电聚合物溶液中逐滴加入30mL水并通入CO2,使溶液中的导电聚合物溶于水中,得到导电聚合物水溶液;
S3、在导电聚合物水溶液中加入1.0g纳米TiO2,纳米TiO2的直径为50nm,进行超声分散10min,得到导电聚合物-纳米TiO2混合溶液;
S4、将5cm2的氨纶布浸入导电聚合物和纳米TiO2混合溶液中,浸渍10min,将导电聚合物-纳米TiO2混合溶液附于氨纶布上,冷冻干燥后再用清水洗除去多余的导电聚合物和纳米TiO2,再冷冻干燥;重复浸渍-干燥-洗涤-干燥过程5次,得到负载纳米TiO2的氨纶布。
实施例6:
一种负载纳米TiO2并具有光催化能力织物的制备方法,包括以下制备步骤:
S1、将0.5g导电聚合物溶于定量的四氢呋喃中,得到导电聚合物溶液,导电聚合物在溶液中的质量分数为30%;
S2、在导电聚合物溶液中逐滴加入1mL水并通入CO2,使溶液中的导电聚合物溶于水中,得到导电聚合物水溶液;
S3、在导电聚合物水溶液中加入0.5g纳米TiO2,纳米TiO2的直径为80nm,进行超声分散10min,得到导电聚合物-纳米TiO2混合溶液;
S4、将3cm2的丙纶布浸入导电聚合物-纳米TiO2混合溶液中,浸渍10min,将导电聚合物-纳米TiO2混合溶液附于尼龙布上,40℃烘箱干燥后再用清水洗除去多余的导电聚合物和纳米TiO2,再40℃烘箱干燥;重复浸渍-干燥-洗涤-干燥过程6次,得到负载纳米TiO2的丙纶布。
根据图2中关于负载纳米TiO2在腈纶上的扫描电镜图可以看出,纳米TiO2以纳米颗粒形式附着于腈纶布上。
使用实施例1中的负载纳米TiO2的涤纶织物对不同浓度R6G进行光催化降解,其光催化降解结果见图3。由图3可知,在光照之前,R6G只有少量被降解;光照之后,R6G随着光照时间的延长而逐渐被降解,特别是在低浓度范围(小于7mg/L),R6G在60min内接近100%被降解。
以上显示和描述了本发明的基本原理、主要特征和优点。本行业的技术人员应该了解,上述实施例不以任何形式限制本发明,凡采用等同替换或等效变换的方式所获得的技术方案,均落在本发明的保护范围内。
Claims (8)
1.一种负载纳米TiO2并具有光催化能力织物的制备方法,其特征在于,包括以下制备步骤:
S1、将导电聚合物溶于少量有机溶剂中,得到导电聚合物溶液,导电聚合物在溶液中的质量分数为5~90%;
S2、在导电聚合物溶液中逐滴加入水并通入CO2,使溶液中的导电聚合物溶于水中,CO2使聚噻吩衍生物中的叔胺基质子化,将聚噻吩衍生物由疏水性转变为亲水性,导电聚合物水溶液中导电聚合物的质量分数为0.1~90%,得到导电聚合物水溶液;
S3、在导电聚合物水溶液中加入纳米TiO2,进行超声分散1~10min,得到导电聚合物-纳米TiO2混合溶液;
S4、将导电聚合物-纳米TiO2混合溶液通过浸渍、浸轧或喷涂方式附于织物上,干燥后除去多余的导电聚合物和纳米TiO2,然后再次干燥处理,得到负载纳米TiO2并具有光催化能力织物。
3.根据权利要求1所述的一种负载纳米TiO2并具有光催化能力织物的制备方法,其特征在于,所述步骤S1中,有机溶剂为二氯甲烷、三氯甲烷、N,N-二甲基甲酰胺、四氢呋喃、二氧六环和二甲基亚砜中的一种或多种。
4.根据权利要求1所述的一种负载纳米TiO2并具有光催化能力织物的制备方法,其特征在于,所述步骤S3中,纳米TiO2的直径为5~200nm,在导电聚合物-纳米TiO2混合溶液中,导电聚合物和纳米TiO2的质量比为(100:1)~(1:100),导电聚合物和纳米TiO2在水溶液中的总质量分数为0.1~50%。
5.根据权利要求1所述的一种负载纳米TiO2并具有光催化能力织物的制备方法,其特征在于,所述步骤S4中,织物的材质为涤纶、锦纶、腈纶、丙纶、氨纶、尼龙或其混纺织物,在织物使用之前,首先用洗衣粉水溶液洗涤其表面的灰尘和油污,并用清水冲洗干净,干燥待用。
6.根据权利要求1所述的一种负载纳米TiO2并具有光催化能力织物的制备方法,其特征在于,所述步骤S4中,两次干燥处理方式均是自然挥发干燥、真空干燥、冷冻干燥、烘箱干燥、红外加热、微波加热的一种或多种,对附有导电聚合物和纳米TiO2织物进行干燥处理的温度为-60~200℃。
7.根据权利要求1所述的一种负载纳米TiO2并具有光催化能力织物的制备方法,其特征在于,所述步骤S4中,除去多余的导电聚合物和纳米TiO2是通过水洗方法实现的。
8.根据权利要求1所述的一种负载纳米TiO2并具有光催化能力织物的制备方法,其特征在于,所述步骤S4中,通过在织物上重复附着导电聚合物-纳米TiO2混合溶液,再分别进行干燥-清水洗涤-干燥处理过程1-10次,以得到不同纳米TiO2负载量织物。
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