CN108355609A - 一种负载铜、银离子改性凹凸棒土及其制备方法 - Google Patents

一种负载铜、银离子改性凹凸棒土及其制备方法 Download PDF

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CN108355609A
CN108355609A CN201810398121.4A CN201810398121A CN108355609A CN 108355609 A CN108355609 A CN 108355609A CN 201810398121 A CN201810398121 A CN 201810398121A CN 108355609 A CN108355609 A CN 108355609A
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attapulgite
silver ion
supported copper
sodium metasilicate
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李声鹏
刘廷凤
黄嘉禄
包宏叶
陈尧
承羽亮
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Nanjing Institute of Technology
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    • B01D53/02Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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Abstract

本发明涉及一种负载铜、银离子改性凹凸棒土及其制备方法,称取硅酸钠与蒸馏水,配置成均匀的悬浊液时,加入凹凸棒土不断搅拌,直至混合形成半干粘稠状,制成球形颗粒状凹凸棒土载体,自然干燥待用;在均匀的硅酸钠悬浊液中加入二氧化钛粉末,边加边搅拌,直至二氧化钛均匀混合;将制好的凹凸棒土球形载体放入粘稠液中,搅拌至凹凸棒球形载体均匀负载上二氧化钛;将其自然晾干后,煅烧,之后自然冷却,用水冲洗;用铜盐、银盐溶液分别进行铜、银离子的负载,溶液PH要调到5‑7左右,负载完毕后再在马弗炉中以250度煅烧0.5‑4h。本发明可在易达到的条件下高效的处理甲醛的目的。

Description

一种负载铜、银离子改性凹凸棒土及其制备方法
技术领域
本发明涉及凹凸棒土的改性领域,具体涉及一种负载铜、银离子改性凹凸棒土及其制备方法。
背景技术
由于新颖的建筑和装饰材料的使用,使越来越多的有害气体甲醛不断的释放到室内。甲醛因来源广、毒性大、污染时间长等已成为室内主要污染物之一。防治高浓度甲醛对室内空气的污染意义重大,是一个急需解决的问题。Cu、Ag扩大光谱吸收范围的性质弥补二氧化钛的紫外线利用率不足的缺点。利用凹凸棒土和二氧化钛通过Cu、Ag等物质改性来达到在易达到的条件下高效的处理甲醛的目的。
发明内容
本发明针对现有技术中存在的问题,提供一种利用凹凸棒土和二氧化钛通过Cu、Ag等物质改性的制备方法来达到在易达到的条件下高效的处理甲醛的目的。
为实现上述目的,本发明提供的技术方案是:
一种负载铜、银离子改性凹凸棒土,通过以下步骤制备得到:
(1)称取硅酸钠与蒸馏水,配置成均匀的悬浊液时,加入粒径1-200μm左右的凹凸棒土并不断搅拌,直至混合形成半干粘稠状,制成球形颗粒状凹凸棒土载体,自然干燥待用;
(2)配置均匀的硅酸钠悬浊液,按照0.01-0.99g/ml比例加入二氧化钛粉末,边加边搅拌,直至二氧化钛均匀混合;
(3)将步骤(1)制好的凹凸棒土球形载体放入步骤(2)的粘稠液中,搅拌至凹凸棒球形载体均匀负载上二氧化钛;将其自然晾干后,在250℃下煅烧0.5-4h,之后自然冷却,用水冲洗;
(4)用浓度为0.1-0.99mol/L的铜盐、银盐溶液分别进行铜、银离子的负载,溶液PH要调到5-7左右,负载完毕后再在马弗炉中以250度煅烧0.5-4h。
硅酸钠悬浊液中硅酸钠与蒸馏水的质量比(1-5):1。
步骤(3)自然冷却后用水反复冲洗至没有二氧化钛粉末脱落为止。
步骤(4)中溶液PH要调到5-7左右。
步骤(4)中每负载一次在20℃水温下进行一次15-45分钟的超声震荡。
与现有技术相比,本发明的有益效果是:
本发明首先利用凹凸棒土价格低廉,具有选择吸附性能,优先吸附极性强的物质;其次摒弃传统的直接浸渍法耗时长的缺点,利用超声波,高效地负载铜离子、银离子;然后通过铜离子、银离子扩大光谱吸收范围的性质弥补二氧化钛的紫外线利用率不足的缺点。
附图说明
图1是本发明实施例1负载铜、银离子前2000倍SEM图。
图2是本发明实施例1负载铜、银离子后2000倍SEM图。
图3是本发明实施例1XRF检测结果图。
具体实施方式
下面结合具体实施例对本发明作进一步说明。
一种负载铜、银离子改性凹凸棒土,通过以下步骤制备得到:
(1)称取质量比1-5:1硅酸钠与蒸馏水中待配置成均匀的悬浊液时,加入粒径1-200μm左右的凹凸棒土并不断搅拌。直至混合形成半干粘稠状,制成球形颗粒,自然干燥待用。
(2)在均匀的硅酸钠悬浊液中,按照0.01-0.99g/ml比例加入二氧化钛粉末,边加边搅拌,直至二氧化钛均匀混合。
(3)将已制好的凹凸棒土球形载体放入(2)中粘稠液,搅拌至凹凸棒球形载体均匀负载上二氧化钛。将其自然晾干后,然后在250℃下煅烧0.5-4h,自然冷却后用水反复冲洗至没有二氧化钛粉末脱落为止。
(4)用浓度为0.1-0.99mol/L的铜盐、银盐溶液分别进行铜、银离子的负载,溶液PH要调到5-7左右,每负载一次在20℃水温下进行一次15-45分钟的超声震荡。负载完毕后再在马弗炉中以250度煅烧0.5-4h。
在图1中,称量20g的硅酸钠,加入10ml蒸馏水中,待配置成均匀的悬浊液时,加入粒径50μm左右的凹凸棒土并不断搅拌。直至混合形成半干粘稠状,制成球形颗粒,自然干燥待用。在均匀的15ml硅酸钠悬浊液中,加入2g二氧化钛粉末,边加边搅拌,直至二氧化钛均匀混合。将已制好的凹凸棒球形载体放入该粘稠液中,搅拌至凹凸棒球形载体均匀负载上二氧化钛。将其自然晾干后,然后在250℃下煅烧1h,自然冷却后用水反复冲洗至没有二氧化钛粉末脱落为止。由图1可以看出,负载前物质表面粗糙,比表面积大,为后续负载铜、银离子提供了大量的附着点。
在图2、图3所示实施例中,用浓度为0.5mol/L的氯化铜和硝酸银溶液分别进行铜、银离子的负载,溶液PH要调到6左右,每负载一次在20℃水温下进行一次15分钟的超声震荡。负载完毕后再在马弗炉中以250度煅烧1H。由图2、图3可以看出,经过超声波负载铜、银离子后的物质的表面结构发生了明显的改变,表面附着微小颗粒,表面更加粗糙,比表面积增加,增强对甲醛的吸附作用。并且物质中含有丰富的Cu和Ag元素,说明了铜、银离子能很好地负载在物质上,实验的改性方法是有效果的。
以上所述,仅是本发明的较佳实施例,并非对本发明作任何形式上的限制,任何熟悉本专业的技术人员,在不脱离本发明技术方案范围内,依据本发明的技术实质,对以上实施例所作的任何简单的修改、等同替换与改进等,均仍属于本发明技术方案的保护范围之内。

Claims (6)

1.一种负载铜、银离子改性凹凸棒土,其特征在于:通过以下步骤制备得到:
(1)称取硅酸钠与蒸馏水,配置成均匀的悬浊液时,加入粒径1-200μm左右的凹凸棒土并不断搅拌,直至混合形成半干粘稠状,制成球形颗粒状凹凸棒土载体,自然干燥待用;
(2)配置均匀的硅酸钠悬浊液,按照0.01-0.99g/ml比例加入二氧化钛粉末,边加边搅拌,直至二氧化钛均匀混合;
(3)将步骤(1)制好的凹凸棒土球形载体放入步骤(2)的粘稠液中,搅拌至凹凸棒球形载体均匀负载上二氧化钛;将其自然晾干后,在250℃下煅烧0.5-4h,之后自然冷却,用水冲洗;
(4)用浓度为0.1-0.99mol/L的铜盐、银盐溶液分别进行铜、银离子的负载,溶液PH要调到5-7左右,负载完毕后再在马弗炉中以250度煅烧0.5-4h。
2.根据权利要求1所述的负载铜、银离子改性凹凸棒土,其特征在于:硅酸钠悬浊液中硅酸钠与蒸馏水的质量比(1-5):1。
3.根据权利要求1所述的负载铜、银离子改性凹凸棒土,其特征在于:步骤(3)自然冷却后用水反复冲洗至没有二氧化钛粉末脱落为止。
4.根据权利要求1所述的负载铜、银离子改性凹凸棒土,其特征在于:步骤(4)中溶液PH要调到5-7左右。
5.根据权利要求1所述的负载铜、银离子改性凹凸棒土,其特征在于:步骤(4)中每负载一次在20℃水温下进行一次15-45分钟的超声震荡。
6.权利要求1所述的负载铜、银离子改性凹凸棒土在除甲醛中的应用。
CN201810398121.4A 2018-04-28 2018-04-28 一种负载铜、银离子改性凹凸棒土及其制备方法 Pending CN108355609A (zh)

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