CN108786780A - 一种纳米复合Zn2TiO4功能材料及其分散液的制备方法 - Google Patents
一种纳米复合Zn2TiO4功能材料及其分散液的制备方法 Download PDFInfo
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- CN108786780A CN108786780A CN201810560205.3A CN201810560205A CN108786780A CN 108786780 A CN108786780 A CN 108786780A CN 201810560205 A CN201810560205 A CN 201810560205A CN 108786780 A CN108786780 A CN 108786780A
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- Colloid Chemistry (AREA)
Abstract
本发明公开了一种纳米复合Zn2TiO4(ZnO‑TiO2)功能材料及其分散液的制备方法。首先制备高分散的纳米复合Zn2TiO4,在溶剂中加入符合化学计量比的锌化合物和钛化合物,并加入水解抑制剂,通过搅拌使锌和钛的化合物缓慢水解,再加入复合螯合剂与金属离子在碱性条件下发生螯合反应,搅拌,加热,凝胶,然后在250~300℃条件下保温6~36小时,得到烧结前驱体;最后,将所得的前驱体在300~500℃条件下保温5~15小时,最终形成一次粒径为10~30nm的ZnO‑TiO2粉体。在此基础上,采用低温离心分离技术,使ZnO‑TiO2、分散剂和溶剂能够达到微观尺度上的高分散以及高稳定性,所形成的1%~60%高固含量纳米复合Zn2TiO4分散液,可广泛应用于抗菌塑料、除臭喷剂、抗菌纤维以及家装除醛等环保领域。
Description
技术领域
本发明涉及一种纳米氧化物材料的制备方法。具体涉及一种纳米复合Zn2TiO4功能材料及其分散液的制备方法。
背景技术
目前,家居生活逐渐成为人们日常生活中的一项重点,而家装涂料是家居装修中不可或缺的一部分,但涂料中一般均含有大量有机挥发物(VOC),这会对人们的健康造成很大伤害。VOC会影响中枢神经系统和免疫功能,引起头痛、疲劳、注意力不集中等症状。空气中VOC 含量小于0.2mg/m3 时,对人体没有影响; 0.2~3mg/m3 时,对人体有轻微刺激或是不适; 3~25 mg /m3 时,对人体有刺激或引起头痛;大于25mg/m3 时,对神经有影响。常见的VOC 主要有苯、甲苯、二甲苯、乙苯、苯乙烯、甲醛、乙醇、十四碳烷等。当居室中的VOC 达到一定浓度时,短时间内人们会感到头痛、恶心、呕吐、乏力等,严重时会出现抽搐、昏迷,并会伤害到人的大脑、内脏和神经系统,造成记忆力减退等严重后果。
常采用的净化室内空气的方法有活性炭和硅藻泥。活性炭的使用初期确实有效果,因为孔隙具有吸附势,是靠碳分子与被吸附分子的引力而形成的,孔径越小,吸附势越强,无论是传统的活性炭,还是炒得比较多的改性活性炭,由于其孔隙过大,吸附能力都有限。活性炭一般对苯类有一定吸附作用,对甲醛的吸附效果不明显,一般一个月之后活性炭的吸附能力就会变弱。而硅藻泥是以多微孔吸附结构的硅藻土、多种矿物组份为主要原材料,可以吸附甲醛、苯等有害气体,但吸附能力也是有限的,后期饱和之后反而会不断释放出来。
由此可见,要想从源头上解决甲醛、苯等气体的危害,需要在吸附的同时将其降解成无害的小分子物质。本发明开发了一种新型的纳米光触媒Zn2TiO4功能材料,可以将吸附进吸附材料微孔中的甲醛、苯等有害气体分子在光电作用下发生电解反应,氧化为对人体无害的二氧化碳和水,这种“类光合作用”可以保证活性炭或硅藻泥微孔的永不饱和,形成源源不断分解甲醛净化室内空气的微动力循环。该功能材料采用复合螯合剂工艺制备,能够保证Zn和Ti离子在分子水平的均匀混合,弥补了传统单螯合剂存在的螯合局部分布不均的难题,并采用低温离心分离技术制备出高浓度分散液。
发明内容
本发明目的在于克服现有除VOC技术中吸附材料易饱和的缺陷,提供一种复合螯合剂制备纳米复合Zn2TiO4功能材料及其分散液的制备方法。该法制备的纳米材料具有更优异的光催化性能,可以长久去除有害气体。
为了实现上述目的,本发明采用如下技术方案:
(1)首先将乙醇、水与硝酸按1:(0.1~0.8):(0.02~0.1)的体积比预混,加入的硝酸作为后续锌和钛的化合物的水解抑制剂,组成混合液;
(2)将Zn和Ti的化合物,按照2:1的摩尔比进行配料,加入到步骤a的混合液中,通过磁力搅拌器常温搅拌至全部溶解;
(3)将复合螯合剂跟水预混,水与螯合剂质量比为(0.1~1):1,混合均匀后滴加氨水至螯合剂全部溶解,搅拌,然后加入到步骤b的混合液中,并加入氨水调节pH值至7~8,并80 oC加热搅拌成溶胶;
(4)将步骤(3)的溶胶继续搅拌至凝胶状态,然后在200~300 oC的鼓风烘箱中烘干6~36小时,得到黑色的前驱体;
(5)将步骤(4)制得的前驱体放入马弗炉中煅烧5~15小时,得到成品白色Zn2TiO4(ZnO-TiO2)复合粉体;
(6)采用低温离心分离技术替代传统砂磨机的格栅技术,使步骤(5)制得的Zn2TiO4复合粉体、分散剂和溶剂形成稳定的胶体,达到微观尺度上的高分散以及高稳定性,形成的1%~60%固含量的纳米复合Zn2TiO4分散液。
所述的锌化合物为硝酸锌、氯化锌、二甲基锌、一乙基锌、二乙基锌、二苯基锌、二(五甲基环戊二烯)基锌中的一种或其组合,所述的钛化合物为钛酸四正丁酯、钛酸四异丙酯或钛的氯化物中的一种或其组合。
所述的复合螯合剂为二硫代氨基甲酸盐、三乙醇胺、乙酸、月桂酸、酒石酸、柠檬酸、草酸、葡萄糖酸、2,2'-联吡啶、1,10-邻二氮杂菲、氨基三乙酸、二亚乙基三胺五乙酸、乙二胺四乙酸中的两种或其多种组合,其中配料比为螯合剂:金属离子=(0.5~3.0):1 (摩尔比)。
所述步骤(5)中烧结的温度为程序阶段升温,升温速率控制为1~20 oC/min,加热范围为300~500 oC,颗粒尺寸大小为10~30 nm。
所述的分散剂为OP系列(烷基酚与环氧乙烷的缩合物)、十六烷基硫酸钠、BYK190、BYK106、BYK-163、BYK182、BYK184、BYK-2164、德谦904S、MOK5032中的一种或其组合,其中纳米粉体材料和分散剂的质量比为1:(0.01~0.3)。所述的溶剂为水、乙醇、乙二醇、甲苯、二甲苯、丙二醇甲醚醋酸酯、有机磷酸酯系列、正己烷、醚类、乙酸乙酯、乙酸丁酯、白油中的一种。
所述的低温离心分离技术的温度范围为-10~10oC。
本发明采用复合螯合剂、碱性合成条件,使锌和钛能够在分子水平上均匀混合,可以明显改善材料的颗粒团聚现象,增加粒径的均一性。水解抑制剂的添加可以将原料的水解速度控制在合理的范围内。同时,利用低温离心分离技术进一步打散颗粒团聚,能够保持长期稳定性,并能实现分散液的高浓度制备。
附图说明
图1为本发明实施例1合成的纳米级Zn2TiO4粉体的TEM图
图2为本发明实施例2合成的纳米级Zn2TiO4粉体的SEM图
图3为本发明实施例3采用低温离心分离技术制备的30%固含量的 Zn2TiO4分散液的SEM图
具体实施方式
本发明下面通过具体实例进行详细的描述,但是本发明的保护范围不受限于这些实施例子。
实施例1:将300 ml乙醇与30 ml水预混组成混合溶剂,再加入6 ml的HNO3作为后续反应的抑制剂;将Zn和Ti的化合物,按照2:1的摩尔比称取22.32g硝酸锌和10.66 g的钛酸四异丙酯,加入到先前的醇水酸混合液中,通过磁力加热搅拌器搅拌,直至全部溶解;再将10.72 g乙二胺四乙酸和3.52 g柠檬酸加入到已预混好的金属离子溶液中,混合均匀后滴加氨水调节pH值至7,继续搅拌;待上述混合液搅拌均匀成溶胶后,再80 oC加热搅拌至凝胶状态,然后在200 oC的鼓风烘箱中烘干6小时,得到黑色蓬松的前驱体;将前驱体放入马弗炉中300 oC,1 oC/min升温速率煅烧5 小时得到白色Zn2TiO4(ZnO-TiO2)复合粉体;取1 gZn2TiO4复合粉体、0.01g分散剂OP9和98.99g水,采用-10oC低温离心分离技术替代传统砂磨机的格栅技术,研磨形成稳定的胶体,达到微观尺度上的高分散以及高稳定性,形成的1%固含量的纳米复合Zn2TiO4分散液。
实施例2:将300 ml乙醇与90 ml水预混组成混合溶剂,再加入15 ml的HNO3作为后续反应的抑制剂;将Zn和Ti的化合物,按照2:1的摩尔比称取10.41g氯化锌和13g的钛酸四正丁酯,加入到先前的醇水酸混合液中,通过磁力加热搅拌器搅拌,直至全部溶解;再将15.3 g月桂酸和7.3 g氨三乙酸加入到已预混好的金属离子溶液中,混合均匀后滴加氨水调节pH值至7.5,继续搅拌;待上述混合液搅拌均匀成溶胶后,再80 oC加热搅拌至凝胶状态,然后在250 oC的鼓风烘箱中烘干12小时,得到黑色蓬松的前驱体;将前驱体放入马弗炉中400oC,5 oC/min升温速率煅烧10 小时得到白色Zn2TiO4(ZnO-TiO2)复合粉体;取10 g Zn2TiO4复合粉体、1g分散剂BYK-2164和89g乙醇,采用0oC低温离心分离技术替代传统砂磨机的格栅技术,研磨形成稳定的胶体,达到微观尺度上的高分散以及高稳定性,形成的10%固含量的纳米复合Zn2TiO4分散液。
实施例3:将300 ml乙醇与150 ml水预混组成混合溶剂,再加入21 ml的HNO3作为后续反应的抑制剂;将Zn和Ti的化合物,按照2:1的摩尔比称取15.1g二甲基锌和15g的四氯化钛,加入到先前的醇水酸混合液中,通过磁力加热搅拌器搅拌,直至全部溶解;再将124.41g二亚乙基三胺五乙酸和30.38 g柠檬酸加入到已预混好的金属离子溶液中,混合均匀后滴加氨水调节pH值至8,继续搅拌;待上述混合液搅拌均匀成溶胶后,再80 oC加热搅拌至凝胶状态,然后在300 oC的鼓风烘箱中烘干24小时,得到黑色蓬松的前驱体;将前驱体放入马弗炉中500 oC,10 oC/min升温速率煅烧15小时得到白色Zn2TiO4(ZnO-TiO2)复合粉体;取30 gZn2TiO4复合粉体、6g分散剂BYK-163和64g甲苯,采用5oC低温离心分离技术替代传统砂磨机的格栅技术,研磨形成稳定的胶体,达到微观尺度上的高分散以及高稳定性,形成的30%固含量的纳米复合Zn2TiO4分散液。
实施例4:将300 ml乙醇与240 ml水预混组成混合溶剂,再加入30 ml的HNO3作为后续反应的抑制剂;将Zn和Ti的化合物,按照2:1的摩尔比称取17.39g二乙基锌和20g的钛酸四异丙酯,加入到先前的醇水酸混合液中,通过磁力加热搅拌器搅拌,直至全部溶解;再将163.95 g月桂酸和40.56 g柠檬酸加入到已预混好的金属离子溶液中,混合均匀后滴加氨水调节pH值至8,继续搅拌;待上述混合液搅拌均匀成溶胶后,再80 oC加热搅拌至凝胶状态,然后在300 oC的鼓风烘箱中烘干36小时,得到黑色蓬松的前驱体;将前驱体放入马弗炉中500 oC,20 oC/min升温速率煅烧15小时得到白色Zn2TiO4(ZnO-TiO2)复合粉体;取40 gZn2TiO4复合粉体、12g分散剂MOK5032和48g丙二醇甲醚醋酸酯,采用10oC低温离心分离技术替代传统砂磨机的格栅技术,研磨形成稳定的胶体,达到微观尺度上的高分散以及高稳定性,形成的40%固含量的纳米复合Zn2TiO4分散液。
实施例5:将300 ml乙醇与240 ml水预混组成混合溶剂,再加入30 ml的HNO3作为后续反应的抑制剂;将Zn和Ti的化合物,按照2:1的摩尔比称取17.39g二乙基锌和20g的钛酸四异丙酯,加入到先前的醇水酸混合液中,通过磁力加热搅拌器搅拌,直至全部溶解;再将123.39 g乙二胺四乙酸和40.56 g柠檬酸加入到已预混好的金属离子溶液中,混合均匀后滴加氨水调节pH值至8,继续搅拌;待上述混合液搅拌均匀成溶胶后,再80 oC加热搅拌至凝胶状态,然后在300 oC的鼓风烘箱中烘干36小时,得到黑色蓬松的前驱体;将前驱体放入马弗炉中500 oC,20 oC/min升温速率煅烧15小时得到白色Zn2TiO4(ZnO-TiO2)复合粉体;取60g Zn2TiO4复合粉体、6g分散剂德谦904S和34 g乙酸乙酯,采用0oC低温离心分离技术替代传统砂磨机的格栅技术,研磨形成稳定的胶体,达到微观尺度上的高分散以及高稳定性,形成的60%固含量的纳米复合Zn2TiO4分散液。
Claims (6)
1.一种纳米复合Zn2TiO4(ZnO-TiO2)功能材料及其分散液的制备方法,其特征在于,该方法的具体步骤为:
(1)首先将乙醇、水与硝酸按1:(0.1~0.8):(0.02~0.1)的体积比预混,加入的硝酸作为后续锌和钛的化合物的水解抑制剂,组成混合液;
(2)将Zn和Ti的化合物,按照2:1的摩尔比进行配料,加入到步骤(1)的混合液中,通过磁力搅拌器常温搅拌至全部溶解;
(3)将复合螯合剂跟水预混,水与螯合剂质量比为(0.1~1):1,混合均匀后滴加氨水至螯合剂全部溶解,搅拌,然后加入到步骤(2)的混合液中,并加入氨水调节pH值至7~8,并80oC加热搅拌成溶胶;
(4)将步骤(3)的溶胶继续搅拌至凝胶状态,然后在200~300 oC的鼓风烘箱中烘干6~36小时,得到黑色的前驱体;
(5)将步骤(4)制得的前驱体放入马弗炉中煅烧5~15小时,得到成品白色Zn2TiO4(ZnO-TiO2)复合粉体;
(6)采用低温离心分离技术替代传统砂磨机的格栅技术,使步骤(5)制得的Zn2TiO4复合粉体、分散剂和溶剂形成稳定的胶体,达到微观尺度上的高分散以及高稳定性,形成的1%~60%固含量的纳米复合Zn2TiO4分散液。
2.根据权利要求1所述的纳米复合Zn2TiO4(ZnO-TiO2)功能材料及其分散液的制备方法,其特征在于,所述的锌化合物为硝酸锌、氯化锌、二甲基锌、一乙基锌、二乙基锌、二苯基锌、二(五甲基环戊二烯)基锌中的一种或其组合,所述的钛化合物为钛酸四正丁酯、钛酸四异丙酯或钛的氯化物中的一种或其组合。
3.根据权利要求1所述的纳米复合Zn2TiO4(ZnO-TiO2)功能材料及其分散液的制备方法,其特征在于,所述的复合螯合剂为二硫代氨基甲酸盐、三乙醇胺、乙酸、月桂酸、酒石酸、柠檬酸、草酸、葡萄糖酸、2,2'-联吡啶、1,10-邻二氮杂菲、氨基三乙酸、二亚乙基三胺五乙酸、乙二胺四乙酸中的两种或其多种组合,其中配料比为螯合剂:金属离子=(0.5~3.0):1(摩尔比)。
4.根据权利要求1所述的纳米复合Zn2TiO4(ZnO-TiO2)功能材料及其分散液的制备方法,其特征在于,所述步骤(5)中烧结的温度为程序阶段升温,升温速率控制为1~20oC/min,加热范围为300~500 oC,颗粒尺寸大小为10~30 nm。
5.根据权利要求1所述的纳米复合Zn2TiO4(ZnO-TiO2)功能材料及其分散液的制备方法,其特征在于,所述的分散剂为OP系列(烷基酚与环氧乙烷的缩合物)、十六烷基硫酸钠、BYK190、BYK106、BYK-163、BYK182、BYK184、BYK-2164、德谦904S、MOK5032中的一种或其组合,其中纳米粉体材料和分散剂的质量比为1:(0.01~0.3);所述的溶剂为水、乙醇、乙二醇、甲苯、二甲苯、丙二醇甲醚醋酸酯、有机磷酸酯系列、正己烷、醚类、乙酸乙酯、乙酸丁酯、白油中的一种。
6.根据权利要求1所述的纳米复合Zn2TiO4(ZnO-TiO2)功能材料及其分散液的制备方法,其特征在于,所述的低温离心分离技术的温度范围为-10~10oC。
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CN113149067B (zh) * | 2021-04-14 | 2024-05-17 | 苏州锦艺新材料科技有限公司 | 一种正钛酸锌粉体及其制备方法 |
CN114042471A (zh) * | 2021-12-03 | 2022-02-15 | 辽宁大学 | 一种可见光响应型Zn2TiO4/g-C3N4异质结材料及其应用 |
CN114042471B (zh) * | 2021-12-03 | 2022-08-30 | 辽宁大学 | 一种可见光响应型Zn2TiO4/g-C3N4异质结材料及其应用 |
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