CN113070027A - 具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜及其制备方法和应用 - Google Patents
具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜及其制备方法和应用 Download PDFInfo
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Abstract
本发明公开了一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜及其制备方法和应用,该光热膜由三钛酸盐和碳纳米管复合物抽滤在薄膜基底上形成。本发明制备工艺简单、操作方便,产生的污染少,合成的吸附剂稳定性好,吸附性能极好,循环效率好,易于回收利用。
Description
技术领域
本发明属于光热以及重金属离子吸附技术领域,更具体的说是涉及一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜及其制备方法和应用。
背景技术
由于全球人口增长、饮食结构变化和气候变化等因素,水资源缺乏问题日益明显。太阳能是地球上生物的最终能源,也是可再生能源。利用光热材料的太阳能驱动蒸发是利用丰富的太阳能来源实现海水淡化的有效技术。在各种光热转换材料中,碳基材料便宜丰富,并且在光谱范围内具有优异的光吸收性。
另一方面,重金属作为有毒非生物可降解污染物,在环境中表现出持久性,给人体健康带来严重威胁,治理水体重金属污染迫在眉睫。而吸附法具有低成本、去除效率高、操作稳定等优势,是从水体中取出重金属污染物经济有效的方法。近年来,由于具有吸附性能极好,易回收,环境友好等特点,钛酸盐作为吸附剂吸附去除铜和其它重金属离子已获得广泛关注。
因此,如何提供一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜及其制备方法和应用成为了本领域技术人员亟需解决的问题。
发明内容
有鉴于此,本发明提供了一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜及其制备方法和应用,制备工艺简单、操作方便,产生的污染少,合成的吸附剂稳定性好,吸附性能极好,循环效率好,易于回收利用。
为了实现上述目的,本发明采用如下技术方案:
一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜,该光热膜由三钛酸盐和碳纳米管复合物抽滤在薄膜基底上形成。
进一步地,碳纳米管还可采用其他碳基材料替代,比如石墨烯、石墨等。
进一步地,所述薄膜基底选自聚四氟乙烯薄膜、聚偏氟乙烯薄膜中的一种,优选为聚四氟乙烯薄膜。
一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜的制备方法,包括如下步骤:
(1)、将TiO2和CNTs加入40mL 10M NaOH溶液中,搅拌超声均匀之后进行微波反应,混合物在10min中内微波升温至200℃,并且在800rpm搅拌速率下保持该温度90min;
(2)、冷却至室温后,离心洗涤至PH=7,在80℃下进行干燥,得到复合材料;
(3)、称取一定量的复合材料搅拌超声均匀分散在去离子水中,然后抽滤在薄膜基底上,得具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜。
进一步地,步骤(1)中,TiO2采用P25,加入量为0.15g。
进一步地,步骤(1)中,CNTs的加入量为0.005g、0.01g、0.03g、0.05g或0.07g。
进一步地,步骤(3)中,称取0.05g的复合材料搅拌超声均匀分散在50mL去离子水中。
进一步地,步骤(3)中,所得三钛酸盐和碳纳米管复合光热膜为直径为4cm的薄膜。
一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜在海水淡化中的应用,包括如下步骤:
将三钛酸盐和碳纳米管复合光热膜悬浮于采集的海水水面上,按每160mL海水在300W氙灯光强为2kW/m2照射下蒸发2h的条件处理。
一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜在铜离子吸附中的应用,包括如下步骤:
将三钛酸盐和碳纳米管复合光热膜悬浮于采集的海水水面上,按每160mL海水在300W氙灯光强为2kW/m2照射下蒸发2h的条件处理,在海水蒸发过程中,每隔一段时间取2mL水样。
一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜在铜离子吸附中的应用,应用于海水淡化协同铜离子吸附。
本发明的有益效果在于:
本发明通过一步水热法,制备出三钛酸盐和碳纳米管复合材料,并且将其分散均匀分散于去离子水中抽滤在薄膜基底上形成具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜。
本发明所使用的化学试剂均为常用试剂、廉价易得。与目前需要用各种金属材料、半导体及复合材料作为光热转换材料的海水淡化实验相比,制备工艺简单、操作方便,产生的污染少,合成的吸附剂稳定性好,吸附性能极好,循环效率好,易于回收利用。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据提供的附图获得其他的附图。
图1为实施例1所制得的具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜的XRD图谱。
图2为实施例1所制得的具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜的SEM图像。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1
本发明提供了一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜,该光热膜由三钛酸盐和碳纳米管复合物抽滤在聚四氟乙烯薄膜上形成。
本实施例中,碳纳米管还可采用其他碳基材料替代,比如石墨烯、石墨等。
本实施例中,所述薄膜基底还可采用聚偏氟乙烯薄膜。
本发明一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜的制备方法,包括如下步骤:
(1)、将0.15gTiO2和0.05gCNTs加入40mL 10M NaOH溶液中,搅拌超声均匀之后进行微波反应,混合物在10min中内微波升温至200℃,并且在800rpm搅拌速率下保持该温度90min;
(2)、冷却至室温后,离心洗涤至PH=7,在80℃下进行干燥,得到复合材料;
(3)、称取0.05g的复合材料搅拌超声均匀分散在50mL去离子水中,然后抽滤在聚四氟乙烯薄膜上,得具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜,所得三钛酸盐和碳纳米管复合光热膜为直径为4cm的薄膜。
本发明制备的产品通过以下手段进行结构表征:采用在日本理学Rigaku D/Max-RB型X射线衍射仪上测量的X射线衍射进行样品的结构分析;采用日本Hitachi S-4800型扫描电子电镜获得的扫描电镜照片。
图1为实施例1所制得的具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜的XRD图谱,图中表明三钛酸盐和碳纳米管复合材料具有良好的结晶度;
图2为实施例1所制得的具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜的SEM图像,图中显示三钛酸盐纳米管和碳纳米管复合材料的成功合成。
取实施例1制得的样品,使三钛酸盐和碳纳米管复合光热膜悬浮于160mL模拟海水的水面上,在300W氙灯光强为2kW/m2照射下蒸发2h。利用分析天平监测模拟海水的质量变化。
取实施例1制得的三钛酸盐和碳纳米管复合光热膜,使其悬浮于160mL模拟海水的水面上,用于吸附海水中的铜离子,在300W氙灯光强为2kW/m2照射下吸附2h,每隔一段时间取2mL水样。用电感耦合等离子体发射光谱仪检测模拟海水中铜离子浓度的变化。
结果表明实施例1所制备的三钛酸盐和碳纳米管复合光热膜在氙灯照射下对于反应器中模拟海水的蒸发速率高达1.80kg/m2h,光热转换效率高达56%;本实施例所制备的具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜,对铜离子的吸附能力达到5.70mg/g,吸附性能极好。
实施例2
与实施例1不同之处仅在于碳纳米管含量不同,实施例2中CNTs为0.005g。结果表明实施例2所制备的三钛酸盐和碳纳米管复合光热膜在氙灯照射下对于反应器中模拟海水的蒸发速率高达1.53kg/m2h,光热转换效率高达48%;本实施例所制备的具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜,对铜离子的吸附能力达到4.57mg/g,吸附性能极好。
实施例3
与实施例1不同之处仅在于碳纳米管含量不同,实施例3中CNTs为0.01g。结果表明实施例3所制备的三钛酸盐和碳纳米管复合光热膜在氙灯照射下对于反应器中模拟海水的蒸发速率高达1.59kg/m2h,光热转换效率高达50%;本实施例所制备的具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜,对铜离子的吸附能力达到4.71mg/g,吸附性能极好。
实施例4
与实施例1不同之处仅在于碳纳米管含量不同,实施例4中CNTs为0.03g。结果表明实施例4所制备的三钛酸盐和碳纳米管复合光热膜在氙灯照射下对于反应器中模拟海水的蒸发速率高达1.69kg/m2h,光热转换效率高达53%;本实施例所制备的具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜,对铜离子的吸附能力达到5.55mg/g,吸附性能极好。
实施例5
与实施例1不同之处仅在于碳纳米管含量不同,实施例5中CNTs为0.07g,其中以碳纳米管含量为0.07g的样品具有最高蒸发速率和光热转换效率。结果表明实施例5所制备的三钛酸盐和碳纳米管复合光热膜在氙灯照射下对于反应器中模拟海水的蒸发速率高达1.97kg/m2h,光热转换效率高达62%;本实施例所制备的具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜,对铜离子的吸附能力达到3.62mg/g,吸附性能极好。
本说明书中各个实施例采用递进的方式描述,每个实施例重点说明的都是与其他实施例的不同之处,各个实施例之间相同相似部分互相参见即可。对于实施例公开的装置而言,由于其与实施例公开的方法相对应,所以描述的比较简单,相关之处参见方法部分说明即可。
对所公开的实施例的上述说明,使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,在其它实施例中实现。因此,本发明将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。
Claims (10)
1.一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜,其特征在于,该光热膜由三钛酸盐和碳纳米管复合物抽滤在薄膜基底上形成。
2.根据权利要求1所述的一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜,其特征在于,所述薄膜基底选自聚四氟乙烯薄膜、聚偏氟乙烯薄膜中的一种。
3.一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜的制备方法,其特征在于,包括如下步骤:
(1)、将TiO2和CNTs加入40mL 10M NaOH溶液中,搅拌超声均匀之后进行微波反应,混合物在10min中内微波升温至200℃,并且在800rpm搅拌速率下保持该温度90min;
(2)、冷却至室温后,离心洗涤至PH=7,在80℃下进行干燥,得到复合材料;
(3)、称取一定量的复合材料搅拌超声均匀分散在去离子水中,然后抽滤在薄膜基底上,得具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜。
4.根据权利要求3所述的一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜的制备方法,其特征在于,步骤(1)中,TiO2的加入量为0.15g。
5.根据权利要求3或4所述的一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜的制备方法,其特征在于,步骤(1)中,CNTs的加入量为0.005g、0.01g、0.03g、0.05g或0.07g。
6.根据权利要求3所述的一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜的制备方法,其特征在于,步骤(3)中,称取0.05g的复合材料搅拌超声均匀分散在50mL去离子水中。
7.根据权利要求3所述的一种具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜的制备方法,其特征在于,步骤(3)中,所得三钛酸盐和碳纳米管复合光热膜为直径为4cm的薄膜。
8.一种采用权利要求3-7中任一项所述制备方法所得到的具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜在海水淡化中的应用,其特征在于,包括如下步骤:
将三钛酸盐和碳纳米管复合光热膜悬浮于采集的海水水面上,按每160mL海水在300W氙灯光强为2kW/m2照射下蒸发2h的条件处理。
9.一种采用权利要求3-7中任一项所述制备方法所得到的具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜在铜离子吸附中的应用,其特征在于,包括如下步骤:
将三钛酸盐和碳纳米管复合光热膜悬浮于采集的海水水面上,按每160mL海水在300W氙灯光强为2kW/m2照射下蒸发2h的条件处理,在海水蒸发过程中,每隔一段时间取2mL水样。
10.一种采用权利要求3-7中任一项所述制备方法所得到的具有铜离子吸附能力的三钛酸盐和碳纳米管复合光热膜在铜离子吸附中的应用,其特征在于,应用于海水淡化协同铜离子吸附。
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