發(fā)布時間：2018-11-12 16:13

【摘要】：近幾年來,工業(yè)廢水的肆意排泄,人們生活用水的不合理處理都對我們的生態(tài)環(huán)境造成重度污染,如何高效率的降解污染物是我們目前要解決的重要問題。本論文通過水熱法制備獲得了兩種以MoS_2為基底的復(fù)合材料:MoS_2/BiVO_4和MoS_2/ZnS,對材料進行表征,并研究了光催化性能,主要研究工作如下:(1)研究尺寸大小對MoS_2微納材料光催化性能的影響。結(jié)果表明:小尺寸的MoS_2光催化性能更好。光催化亞甲基藍(MB)試劑,僅用120分鐘,降解效率就達41.4%。(2)研究物料配比對MoS_2/BiVO_4復(fù)合材料的形貌及光催化性能的影響。結(jié)果表明:物料配比不同使MoS_2/BiVO_4形貌發(fā)生變化�？梢姽鈼l件下,與純MoS_2對比,MoS_2/BiVO_4光催化降解MB結(jié)果更明顯。并且含量上BiVO_4所占比重逐漸增多,復(fù)合材料的光催化能力逐漸提高,其中,當(dāng)物料摩爾比MoS_2:Bi(NO_3)_3:NH_4VO_3為6:5:5時,合成的MBV5樣品光催化性能最優(yōu),僅用120分鐘,降解效率就為71%。(3)研究MB濃度對MoS_2/ZnS復(fù)合材料光催化性能的影響。結(jié)果表明:MoS_2/ZnS形貌呈微球狀,尺寸約為2μm,結(jié)晶質(zhì)量較好�？梢姽鈼l件下,MoS_2/ZnS光催化性能更優(yōu)異。當(dāng)MB濃度為15mg·L-1,加入20mg的MoS_2/ZnS,光照120分鐘,降解效率高達99.8%。
[Abstract]:In recent years, the wanton discharge of industrial wastewater and unreasonable treatment of people's domestic water have caused serious pollution to our ecological environment. How to degrade pollutants efficiently is an important problem that we need to solve at present. In this paper, two kinds of composites based on MoS_2: MoS_2/BiVO_4 and MoS_2/ZnS, were prepared by hydrothermal method, and their photocatalytic properties were studied. The main research work is as follows: (1) the effect of size on photocatalytic performance of MoS_2 micro / nano materials is studied. The results show that the photocatalytic performance of small size MoS_2 is better. The degradation efficiency of the photocatalytic methylene blue (MB) reagent was 41.4% in 120 minutes. (2) the effect of the ratio of materials on the morphology and photocatalytic performance of MoS_2/BiVO_4 composite was studied. The results showed that the morphology of MoS_2/BiVO_4 was changed with different material ratio. Compared with pure MoS_2, the photocatalytic degradation of MB by MoS_2/BiVO_4 was more obvious under visible light. And the proportion of BiVO_4 increased gradually, and the photocatalytic ability of the composite was improved gradually. When the molar ratio of MoS_2:Bi (NO_3) _ 3:NH_4VO_3 was 6:5:5, The photocatalytic activity of the synthesized MBV5 samples was the best, and the degradation efficiency was 71g in 120 minutes. (3) the effect of MB concentration on the photocatalytic performance of MoS_2/ZnS composites was studied. The results show that the morphology of MoS_2/ZnS is microsphere, the size is about 2 渭 m, and the crystal quality is good. Under visible light, the photocatalytic performance of MoS_2/ZnS is better. When the concentration of MB was 15mg L -1, the degradation efficiency of MoS_2/ZnS, was 99.8 when 20mg was added to MoS_2/ZnS, for 120 minutes.
【學(xué)位授予單位】：長春理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O643.36;O644.1

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