锌锰氧化物纳米粒子的制备及其光化学性质研究

发布时间：2018-05-16 09:29

本文选题：锌锰氧化物 + 纳米粒子　；参考：《渤海大学》2017年硕士论文

【摘要】：本论文以废旧碱性锌锰电池为原料,控制锌投加量合成Zn_xMn_(1-x)O纳米粒子,分析其对双酚A的光催化降解性能,并使用Zn_xMn_(1-x)O纳米粒子光催化降解水中的对苯二酚和间苯二酚。实验结果如下:1.将电池拆分成塑料、铜帽、锌和粉末等,把捣碎的锌和预处理的粉末依次加入H2SO4溶液溶解,然后加入NH3H2O共沉淀制成Zn_xMn_(1-x)O纳米粒子,通过X射线粉末衍射仪(XRD)、能谱(EDS)、扫描电镜(SEM)等表征手段分析合成的Zn_xMn_(1-x) O纳米粒子,结果显示合成的Zn0.5Mn0.5O纳米粒子是直径为60 nm的圆柱体,产率为57.1%。2.研究分析了不同锌锰比例的Zn_xMn_(1-x)O纳米粒子对双酚A的吸附能力以及在模拟太阳光源下的光催化降解效率。Zn_xMn_(1-x)O纳米粒子对双酚A的吸附平衡时间为40 min;在模拟太阳光照射180 min后,双酚A光解了21.7±1.6%,而Zn0.1Mn0.9O、Zn0.3Mn0.7O、Zn0.5Mn0.5O纳米粒子对双酚A的光催化降解效率分别为59.41±4.32%、83.43±2.73%和71.22±4.79%。结果表明Zn0.3Mn0.7O纳米粒子的光催化降解性能要优于Zn0.1Mn0.9O、Zn0.5Mn0.5O纳米粒子。3.分析探讨了Zn_xMn_(1-x)O纳米粒子对对苯二酚光催化降解的最优条件:初始浓度为20 mg/L,Znx Mn1-xO投加量为0.16 g/L,初始pH为7.0,H2O2添加量为0.2%,经过光照180 min,降解率可达到98%。4.分析探讨了Zn_xMn_(1-x)O纳米粒子对间苯二酚光催化降解的最优条件:初始浓度为10 mg/L,Znx Mn1-xO投加量为0.12 g/L,初始pH为6.5,H2O2添加量为0.2%,经过光照180 min,降解率可以达到80%以上。实验发现利用废旧锌锰电池为原料制备Zn_xMn_(1-x)O纳米粒子,一方面可以解决废弃电池的回收利用问题,降低催化剂的成本,另一方面还可以解决水污染问题,达到以“废”治“污”的目的。
[Abstract]:In this paper, Zn_xMn_(1-x)O nanoparticles were synthesized by controlling the dosage of zinc in waste alkaline Zn-Mn batteries, and the photocatalytic degradation of bisphenol A was analyzed. Zn_xMn_(1-x)O nanoparticles were used to photocatalytic degradation of hydroquinone and resorcinol in water. The results of the experiment are as follows: 1. The battery was separated into plastic, copper cap, zinc and powder. The crushed zinc and the pretreated powder were dissolved in H2SO4 solution, then co-precipitated with NH3H2O to form Zn_xMn_(1-x)O nanoparticles. The synthesized Zn0.5Mn0.5O nanoparticles were characterized by X-ray powder diffractometer, EDS, SEM and SEM. The results showed that the synthesized Zn0.5Mn0.5O nanoparticles were cylindrical with diameter of 60 nm and the yield was 57.1 and 0.2. The adsorption capacity of Zn_xMn_(1-x)O nanoparticles with different ratios of zinc and manganese to bisphenol A and the photocatalytic degradation efficiency under simulated solar light source. The adsorption equilibrium time for bisphenol A was 40 minutes. After simulated solar irradiation for 180 min, the adsorption equilibrium time for bisphenol A was 40 mins. The photocatalytic degradation efficiency of bisphenol A was 59.41 卤4.320.43 卤2.73% and 71.22 卤4.79%, respectively. The results show that the photocatalytic degradation of Zn0.3Mn0.7O nanoparticles is superior to that of Zn0.1Mn0.9O- Zn0.5Mn0.5O nanoparticles. The optimum conditions for photocatalytic degradation of hydroquinone by Zn_xMn_(1-x)O nanoparticles were analyzed and discussed. The initial concentration of 20 mg / L Znx Mn1-xO was 0.16 g / L, the initial pH was 7.0% H _ 2O _ 2 was 0.2 and the degradation rate was 98.4 after 180 mins of illumination. The optimum conditions for photocatalytic degradation of resorcinol by Zn_xMn_(1-x)O nanoparticles were discussed. The initial concentration of 10 mg / L Znx Mn1-xO was 0.12 g / L, and the initial pH of 6.5% H _ 2O _ 2 was 0.2%. After irradiation for 180 min, the degradation rate could reach more than 80%. It is found that the preparation of Zn_xMn_(1-x)O nanoparticles using waste Zn / mn batteries as raw materials can solve the problem of recycling waste batteries and reduce the cost of catalyst, on the other hand, it can also solve the problem of water pollution. To achieve the purpose of "waste" to deal with "pollution".
【学位授予单位】：渤海大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X703;TB383.1

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