CN108745383A - 一种复合硫化锰催化剂的制备方法 - Google Patents
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Abstract
本发明公开一种复合硫化锰催化剂的制备方法，依次包括如下步骤：在室温条件下，把浓度为0.5～1.0mol/L的氯化锰溶液滴加到浓度为0.1～0.5mol/L的氯化铜溶液中，控制Mn2+/Cu2+＝5～8：1，滴加完成后，将该混合溶液置于100℃的沸水中，生成氢氧化铜胶体，氯化锰被吸附于氢氧化铜胶体表面；将2g凹凸棒土加入到上述胶体溶液中，搅拌20～40min，再将硫化氢气体通入，所述硫化氢气体浓度为20～40ppm，每100mL胶体溶液通入20～40L硫化氢气体，并搅拌生成沉淀，将沉淀物固液分离，用蒸馏水洗涤3～5遍后在105℃下烘干，得到一种复合硫化锰催化剂。利用化工生产产生的硫化氢废气为原料，吸收硫化氢气体，变废为宝，在凹凸棒土表面形成氧化铜复合的硫化锰催化剂。
Description
技术领域
本发明涉及环境污染控制新材料领域，尤其涉及一种复合硫化锰催化剂的制备方法。
背景技术
硫化氢广泛存在于天然气和沼气中，具有刺激性恶臭气味，不仅对人体毒性很大，而且易燃易爆，极易腐蚀金属，堵塞管道，工厂排放的尾气及天然气即使含有少量的硫化氢也会对环境造成很大污染，有时甚至因为低浓度的硫化氢存在而浪费了很多资源。凡含硫的化合物通过各类反应都有生成硫化氢的可能性，工业废气中的硫化氢主要源于炼油厂、天然气净化厂、煤气净化厂、冶炼厂、制革厂、氮肥厂、农药厂等，但在数量上以炼油厂、天然气净化厂、煤气净化厂和合成氮肥原料气为主。多年来，国内外研究人员对天然气、煤层气和沼气等含硫气体的脱硫问题进行了大量研究。硫化氢在处理过程中往往是被吸附或水洗后成为废弃物，没有综合利用。
半导体催化剂在水处理中有较多应用，随着生产的发展，来自工农业生产中产生的毒害有机污染物严重威胁着环境和人类的健康，寻求一种新型高效的环境治理技术具有重要的意义。光催化技术因其节能、高效、污染物降解彻底、无二次污染优点，目前已成为一种具有重要应用前景的新兴环境治理技术。近年来，新型高效的可见光光催化剂的研制成为光催化技术中的一个重要研究内容。
过渡金属氧化物，氧化铜在电、磁和催化等领域表现出奇特的物理和化学性能，引起人们的广泛关注，被广泛应用于印染、陶瓷、电极活性材料及催化剂等重要领域。硫化锰具有较大的带宽(Eg＝3.7ev)并不适合作为光催化剂用于污染物降解，但经过复合，可以达到较好的光催化降解的效果。
发明内容
本发明的目的是为克服现有技术的不足，提供一种复合硫化锰催化剂的制备方法。
本发明采用的技术方案是依次包括如下步骤：
1)在室温条件下，把浓度为0.5～1.0mol/L的氯化锰溶液滴加到浓度为0.1～0.5mol/L的氯化铜溶液中，控制Mn2+/Cu2+＝5～8：1，滴加完成后，将该混合溶液置于100℃的沸水中，生成氢氧化铜胶体，氯化锰被吸附于氢氧化铜胶体表面；
2)将2g凹凸棒土加入到上述胶体溶液中，搅拌20～40min，再将硫化氢气体通入，所述硫化氢气体浓度为20～40ppm，每100mL胶体溶液通入20～40L硫化氢气体，并搅拌生成沉淀，将沉淀物固液分离，用蒸馏水洗涤3～5遍后在105℃下烘干，得到一种复合硫化锰催化剂。
本发明的优点是：利用凹凸棒土的针状结构为骨架，利用氢氧化铜胶体对氯化锰的吸附作用，在凹凸棒土的表面形成均匀覆盖，并利用化工生产产生的硫化氢废气为原料，吸收硫化氢气体，变废为宝，在凹凸棒土表面形成氧化铜复合的硫化锰催化剂。该催化剂效果优于单独氧化铜或单独硫化锰，并且在凹凸棒的负载的下，形成极大的表面积。
具体实施方式
以下进一步提供本发明的3个实施例：
实施例1
在室温条件下，把浓度为0.5～1.0mol/L的氯化锰溶液滴加到浓度为0.1～0.5mol/L的氯化铜溶液中，控制Mn2+/Cu2+＝5～8：1，滴加完成后，将该混合溶液置于100℃的沸水中，生成氢氧化铜胶体，氯化锰被吸附于氢氧化铜胶体表面；将2g凹凸棒土加入到上述胶体溶液中，搅拌20～40min，再将硫化氢气体通入，所述硫化氢气体浓度为20～40ppm，每100mL胶体溶液通入20～40L硫化氢气体，并搅拌生成沉淀，将沉淀物固液分离，用蒸馏水洗涤3～5遍后在105℃下烘干，得到一种复合硫化锰催化剂。
制得的复合硫化锰催化剂比表面积为：620m2/g。
0.5g复合硫化锰催化剂加入到200mL浓度为25mg/L的亚甲基蓝废水中，在120W的LED灯照射下，反应180min，脱色率为95.1％，催化剂分离重复利用5次后，第六次应用，同样条件下，反应180min，脱色率为90.2％。
实施例2
在室温条件下，把浓度为0.5～1.0mol/L的氯化锰溶液滴加到浓度为0.1～0.5mol/L的氯化铜溶液中，控制Mn2+/Cu2+＝5～8：1，滴加完成后，将该混合溶液置于100℃的沸水中，生成氢氧化铜胶体，氯化锰被吸附于氢氧化铜胶体表面；将2g凹凸棒土加入到上述胶体溶液中，搅拌20～40min，再将硫化氢气体通入，所述硫化氢气体浓度为20～40ppm，每100mL胶体溶液通入20～40L硫化氢气体，并搅拌生成沉淀，将沉淀物固液分离，用蒸馏水洗涤3～5遍后在105℃下烘干，得到一种复合硫化锰催化剂。
0.5g复合硫化锰催化剂加入到200mL浓度为25mg/L的酸性橙染料废水中，在120W的LED灯照射下，反应180min，脱色率为96.5％
实施例3
在室温条件下，把浓度为0.5～1.0mol/L的氯化锰溶液滴加到浓度为0.1～0.5mol/L的氯化铜溶液中，控制Mn2+/Cu2+＝5～8：1，滴加完成后，将该混合溶液置于100℃的沸水中，生成氢氧化铜胶体，氯化锰被吸附于氢氧化铜胶体表面；将2g凹凸棒土加入到上述胶体溶液中，搅拌20～40min，再将硫化氢气体通入，所述硫化氢气体浓度为20～40ppm，每100mL胶体溶液通入20～40L硫化氢气体，并搅拌生成沉淀，将沉淀物固液分离，用蒸馏水洗涤3～5遍后在105℃下烘干，得到一种复合硫化锰催化剂。
0.6g复合硫化锰催化剂加入到200mL浓度为25mg/L的亚甲基蓝废水中，在120W的LED灯照射下，反应150min，脱色率为95.3％。
Claims (1)
1.一种复合硫化锰催化剂的制备方法，其特征是依次包括如下步骤：
1)在室温条件下，把浓度为0.5～1.0mol/L的氯化锰溶液滴加到浓度为0.1～0.5mol/L的氯化铜溶液中，控制Mn2+/Cu2+＝5～8：1，滴加完成后，将该混合溶液置于100℃的沸水中，生成氢氧化铜胶体，氯化锰被吸附于氢氧化铜胶体表面；
2)将2g凹凸棒土加入到上述胶体溶液中，搅拌20～40min，再将硫化氢气体通入，所述硫化氢气体浓度为20～40ppm，每100mL胶体溶液通入20～40L硫化氢气体，并搅拌生成沉淀，将沉淀物固液分离，用蒸馏水洗涤3～5遍后在105℃下烘干，得到一种复合硫化锰催化剂。
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| CN113893679A (zh) * | 2021-10-28 | 2022-01-07 | 中建材蚌埠玻璃工业设计研究院有限公司 | 一种cigs薄膜电池尾气用净化剂及其制备方法 |
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