CN111151262B - 一种Mn-Cu2O改性光催化剂及其制备方法 - Google Patents
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- 229940071125 manganese acetate Drugs 0.000 claims abstract description 9
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 claims abstract description 9
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- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 1
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- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明提供了一种Mn‑Cu2O改性光催化剂的制备方法,首先配制乙酸铜溶液、氢氧化钠溶液和葡萄糖溶液,然后取适量的乙酸铜溶液、氢氧化钠溶液和葡萄糖溶液混合并搅拌均匀,最后加入乙酸锰并置于反应釜中,在鼓风干燥箱中反应一定时间,自然冷却到室温后离心、洗涤、干燥,得到Mn‑Cu2O微粒。本发明制备的Mn‑Cu2O微粒纯度高,对有机污染物降解效果显著,有着巨大的应用前景。
Description
技术领域
本发明涉及光催化剂领域,具体涉及一种Mn-Cu2O改性光催化剂及其制备方法。
背景技术
随着社会的发展,环境问题越来越威胁人类的生存,其中水污染问题成为当今最为首要解决的问题。但是由于传统的污水处理技术的局限性,耗能较大,存在二次污染,因此建立一种能耗小、效果明显的污水处理方法是非常必要的。光催化是近年来发展起来的一种新型污染物处理技术,由于具有成本低、反应条件温和、无二次污染等优点而成为水处理领域的研究热点,是一种公认的有前途的有机污染物处理技术。半导体光催化利用太阳能驱动化学反应用于光催化降解有机污染物,对于节约资源、保护环境、实现可持续发展具有重要意义。半导体光催化剂是光催化氧化技术的核心,目前所开发的大多数半导体光催化剂只能吸收太阳光的紫外光波长,对太阳光的直接利用率很低。氧化亚铜具有可以吸收可见光、价格低廉、易于制备等优点,作为现阶段较好的光催化半导体材料而被广泛研究。
发明内容
基于此,有必要针对以上问题,提供一种可以吸收较多可见光,分散稳定性好的光催化剂及其制备方法。
为达到此目的,本发明所采用的的技术方案是:
一种Mn-Cu2O改性光催化剂的制备方法,包括以下步骤:
步骤1:分别配制乙酸铜溶液、氢氧化钠溶液、葡萄糖溶液,所述乙酸铜溶液的浓度为0.1-0.5mol/L,氢氧化钠溶液浓度为1.0-2.0 mol/L,葡萄糖溶液浓度为0.1-0.5mol/L;
步骤2:分别取步骤1所述乙酸铜溶液、氢氧化钠溶液、葡萄糖溶液,按摩尔比为4:16:1加入烧杯中搅拌混合均匀,搅拌10min;
步骤3:向步骤2的混合溶液中加入乙酸锰5-35mg,并搅拌30min 至全部溶解;
步骤4:将步骤3得到的混合液倒入反应釜中并在鼓风干燥箱中进行反应,制备Mn-Cu2O微粒,所述鼓风干燥箱温度为120-160℃,反应时间6-10h;
步骤5:将步骤4得到的Mn-Cu2O微粒进行离心,依次用去离子水和无水乙醇交替洗涤3次,并在50℃下干燥12h。
一种Mn-Cu2O改性光催化剂,所述Mn-Cu2O改性光催化剂采用如本申请所述的一种Mn-Cu2O改性光催化剂的制备方法制备而成。
与现有技术相比,本发明的有益效果是:
本发明制备过程简单、成本低,有良好的分散稳定性,其光生电子-空穴分离良好,光催化活性高。
附图说明
图1是用本发明实施例制备方法得到的Mn-Cu2O微粒的XRD谱图;
图2是本发明实施例4的EDS分析;
图3是本发明实施例制备的Mn-Cu2O微粒降解诺氟沙星降解率曲线图;
图4是本发明实施例制备的Mn-Cu2O微粒降解左氧氟沙星降解率曲线图。
具体实施方法
为使本发明的上述目的、特征和优点能够更加明显易懂,以下结合具体实施方式,对本发明进行进一步详细说明。
实施例1
分别配制0.1mol/L乙酸铜溶液、0.5mol/L葡萄糖溶液和1.5 mol/L的氢氧化钠溶液,然后分别量取40mL乙酸铜溶液、2mL葡萄糖溶液和11mL氢氧化钠溶液,加入到烧杯中,搅拌均匀,随后加入20mg乙酸锰并搅拌30min后倒入50mL反应釜中,在鼓风干燥箱内160℃条件下反应8h后冷却至室温,离心,依次用去离子水和无水乙醇交替洗涤3次,在50℃下干燥12h,所得样品记为A。
参见图1所示,样品A的XRD表征,所制备样品纯度高。
实施例2
分别配制0.3mol/L乙酸铜溶液、0.1mol/L葡萄糖溶液和2.0 mol/L的氢氧化钠溶液,分别量取11mL乙酸铜溶液、8mL葡萄糖溶液和7mL氢氧化钠溶液,加入到烧杯中,搅拌均匀,随后加入20 mg乙酸锰并搅拌30min后倒入50mL反应釜中,在鼓风干燥箱内 160℃条件下反应8h后冷却至室温,离心,依次用去离子水和无水乙醇交替洗涤3次,在50℃下干燥12h,所得样品记为B。
参见图1所示,样品B的XRD表征,所制备样品纯度高。
实施例3
分别配制0.5mol/L乙酸铜溶液、0.3mol/L葡萄糖溶液和1.0 mol/L的氢氧化钠溶液,分别量取10mL乙酸铜溶液、4mL葡萄糖溶液和23mL氢氧化钠溶液,加入到烧杯中,搅拌均匀,随后加入 20mg乙酸锰并搅拌30min后倒入50mL反应釜中,在鼓风干燥箱内160℃条件下反应8h后冷却至室温,离心,依次用去离子水和无水乙醇交替洗涤3次,在50℃下干燥12h,所得样品记为C。
参见图1所示,样品C的XRD表征,所制备样品纯度高。
实施例4
向烧杯中加入16mL 0.2mol/L乙酸铜溶液,缓慢加入11mL 1.2 mol/L的氢氧化钠溶液并不断搅拌,然后加入4mL 0.2mol/L的葡萄糖溶液,搅拌均匀后加入20mg乙酸锰,搅拌30min后置于反应釜中,在150℃下反应8h后冷却至室温,依次用去离子水和无水乙醇交替洗涤3次,在50℃下干燥12h,记为样品G。
参见图2,所制备样品的EDS图表明Mn元素进入到Cu2O晶体中,这说明制备出了Mn掺杂的Cu2O改性光催化剂(Mn-Cu2O)。
为了得到本发明实施例所制备的Mn-Cu2O光催化剂对有机废水的处理效果,本发明以诺氟沙星和左氧氟沙星为例,作为光催化评价指标,测试其光催化效果,对实施例所述制备的样品A、B、C和G 进行测试。测试结果参见图3和图4。样品A、B、C和G对诺氟沙星的降解率为75%-80%,对左氧氟沙星的降解率为50%-60%。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此理解为对发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。
Claims (2)
1.一种Mn-Cu2O改性光催化剂的制备方法,其特征在于,包括以下步骤:
步骤1:分别配制乙酸铜溶液、氢氧化钠溶液、葡萄糖溶液,所述乙酸铜溶液的浓度为0.1-0.5mol/L,氢氧化钠溶液浓度为1.0-2.0mol/L,葡萄糖溶液浓度为0.1-0.5mol/L;
步骤2:分别取步骤1所述乙酸铜溶液、氢氧化钠溶液、葡萄糖溶液,按摩尔比为4:16:1加入烧杯中搅拌混合均匀,搅拌10min;
步骤3:向步骤2的混合溶液中加入乙酸锰5-35mg,并搅拌30min至全部溶解;
步骤4:将步骤3得到的混合液倒入反应釜中并在鼓风干燥箱中进行反应,制备Mn-Cu2O微粒,所述鼓风干燥箱温度为120-160℃,反应时间6-10h;
步骤5:将步骤4得到的Mn-Cu2O微粒进行离心,依次用去离子水和无水乙醇交替洗涤3次,并在50℃下干燥12h。
2.一种Mn-Cu2O改性光催化剂,其特征在于,所述Mn-Cu2O改性光催化剂采用如权利要求1所述的一种Mn-Cu2O改性光催化剂的制备方法制备而成。
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