發(fā)布時間：2018-06-03 12:33

  本文選題：木質(zhì)素磺酸鈉 + C　； 參考：《東北林業(yè)大學》2015年碩士論文

【摘要】：隨著環(huán)境污染的加劇,光催化作為一種降解有機污染物的綠色技術(shù),高效并具有廣泛的適用性,氧化鋅便是其中一種性能優(yōu)異的半導體光催化材料。炭材料因其較大的比表面積和豐富的孔隙結(jié)構(gòu)常被用作催化劑或載體。將氧化鋅和炭材料結(jié)合起來,采取較為簡單的方法制備出更為高效和成本低廉的光催化復合材料,在處理有機污染物方面具有重大意義。本文采用制漿造紙廢液中的木質(zhì)素磺酸鹽,輔助制備具有不同形貌的C-ZnO復合材料,對所制備的復合材料的光催化性能進行了研究,并得出復合材料的生長機制和光催化機理。主要內(nèi)容如下：通過直接沉淀法,以木質(zhì)素磺酸鈉為表面活性劑和碳源,在水-乙醇混合溶劑中制備出了C-ZnO復合材料。通過XRD、拉曼光譜和XPS分析了復合材料的組成和結(jié)構(gòu),證明了復合材料中含有ZnO和碳。同時,探討了不同木質(zhì)素磺酸鈉的添加量、燒結(jié)溫度和溶液pH值對復合材料形貌、結(jié)構(gòu)的影響,結(jié)果表明碳與氧化鋅形成了以碳為基底,氧化鋅從碳中生長出來的結(jié)構(gòu)。對所制備的C-ZnO復合材料進行了光催化性能研究。由于材料的這種結(jié)構(gòu),使其在紫外光照射下能將有機污染物先吸附于催化劑的表層,然后吸附與光降解過程同時進行,這種協(xié)同作用使得材料的光催化效率得到提高。實驗還通過調(diào)控木質(zhì)素磺酸鈉添加量,燒結(jié)溫度,反應(yīng)溶液的堿度和陳化高度來探究不同參數(shù)的變化對合成出的C-ZnO復合材料的光催化效率的影響,從中選擇最佳制備方法。
[Abstract]:With the worsening of environmental pollution, photocatalysis as a green technology for the degradation of organic pollutants is highly efficient and widely applicable, among which zinc oxide is one of the excellent semiconductor photocatalytic materials. Carbon material is often used as catalyst or carrier because of its large specific surface area and abundant pore structure. It is of great significance to combine zinc oxide with carbon materials to prepare photocatalytic composites with higher efficiency and lower cost by means of simple methods. It is of great significance in the treatment of organic pollutants. In this paper, C-ZnO composites with different morphologies were prepared by using lignin sulfonate in pulping and papermaking waste liquor. The photocatalytic properties of the composites were studied, and the growth mechanism and photocatalytic mechanism of the composites were obtained. The main contents are as follows: C-ZnO composites were prepared by direct precipitation method using sodium lignosulfonate as surfactant and carbon source in water-ethanol mixed solvent. The composition and structure of the composites were analyzed by XRD, Raman spectroscopy and XPS. It was proved that the composites contain ZnO and carbon. At the same time, the effects of different amount of sodium lignosulfonate, sintering temperature and pH value on the morphology and structure of the composites were discussed. The results showed that carbon and zinc oxide formed the structure of carbon and zinc oxide grown from carbon. The photocatalytic properties of the prepared C-ZnO composites were studied. Due to this structure, organic pollutants can be adsorbed on the surface of the catalyst under UV irradiation, and then adsorbed at the same time as the photodegradation process. This synergistic effect improves the photocatalytic efficiency of the materials. The effects of different parameters on the photocatalytic efficiency of the synthesized C-ZnO composites were investigated by adjusting the amount of sodium lignosulfonate, sintering temperature, basicity and aging height of the reaction solution, and the optimum preparation method was selected.
【學位授予單位】：東北林業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB332;O643.36

【參考文獻】

相關(guān)期刊論文 前1條

1 吳輝燃;諶凡更;錢磊磊;;堿抽提木質(zhì)素制備磺化木質(zhì)素的研究[J];造紙科學與技術(shù);2011年05期

相關(guān)博士學位論文 前1條

1 王曉紅;木質(zhì)素在納米ZnO光催化劑制備及染料廢水處理中的應(yīng)用研究[D];江蘇大學;2014年

相關(guān)碩士學位論文 前1條

1 黃橋;石墨在氧化還原過程中結(jié)構(gòu)的演變及電學性能研究[D];西南科技大學;2012年

，

本文編號：1972793