本文選題：活性炭 + 復合材料�。� 參考：《中國計量學院》2015年碩士論文

【摘要】：活性炭(AC)具備發(fā)達的孔隙結構,大的比表面積和孔容,對氣體、溶液中的小顆粒雜質、大分子物質、重金屬離子等污染物都有較強的吸附能力。同時,因其發(fā)達的孔道結構和比表面積,活性炭是一種優(yōu)良的模板劑,許多功能材料(比如磁性材料、光催化劑、吸波材料等)可以負載于活性炭表面或者進入活性炭孔道,從而得到性能優(yōu)異的活性炭復合材料。磁性活性炭具有較大的比表面積和優(yōu)異的磁性能,是一種可分離、吸附水中有機染料的有效吸附劑。本論文采用不同的化學方法合成了不同磁介質負載活性炭復合材料,研究復合材料對亞甲基藍(MB)的吸附行為來判定吸附性能。論文通過改變磁介質與活性炭的比例優(yōu)化其磁響應及吸附能力。1、采用溶膠-凝膠(sol-gel)法,成功制備了一系列磁性CoxFey/Co Fe2O4/AC復合材料,所有樣品都具有優(yōu)異的磁響應現(xiàn)象,同時對MB的吸附能力強。研究了磁性物質與活性炭的比例對CoxFey/Co Fe2O4/AC復合材料物相、磁性能以及吸附性能的影響。研究表明,隨著AC比例的增加,CoxFey/Co Fe2O4/AC復合材料的磁響應效果減弱,對MB的吸附能力降低。同時Co:Fe:AC的添加量摩爾比為1:2:150得到的樣品(CFA/AC-150)因其較好的Ms(13.33 emu/g)和較高的比表面積(962.78 m2·g-1),從而更適合用于染料污水處理,并且能夠應用磁分離技術快速地回收磁性活性炭。2、采用水熱法合成了一系列Co Fe2O4/AC復合材料,所有樣品都具有良好的磁響應現(xiàn)象,同時對MB的吸附能力強。研究了磁性物質和AC的摩爾比例對Co Fe2O4/AC復合材料物相、磁性能以及吸附性能的影響。研究表明,隨著AC比例的增加,Co Fe2O4/AC復合材料的磁響應效果減弱,對MB的吸附能力降低。同時Co:Fe:AC的添加量摩爾比為1:2:200得到的樣品(CF/AC-200)因其適宜的Ms(5.11 emu/g)和最高的比表面積(1096.85 m2·g-1),從而更適合用于染料污水處理,并且能夠應用磁分離技術快速地回收磁性活性炭。3、采用微乳液法合成了一系列Ni/AC復合材料,所有樣品都具有良好的磁響應現(xiàn)象,同時對MB的吸附能力強。研究了磁性物質和AC的摩爾比例對Ni/AC復合材料物相、磁性能以及吸附性能的影響。研究表明,隨著AC比例的增加,Ni/AC復合材料的磁響應效果減弱,對MB的吸附能力降低。同時Ni:AC的添加量摩爾比為1:50得到的樣品(Ni/AC-50)因其適宜的Ms(3.39 emu/g)和最高的比表面積(1156.85 m2·g-1),從而更適合用于染料污水處理,并且能夠應用磁分離技術快速地回收磁性活性炭。除此之外,研究表明sol-gel法會對AC的孔道結構造成一定的破壞,從而降低磁性活性炭的比表面積和總孔容,減弱了其吸附能力。水熱法和微乳液法不會破壞AC的孔道結構,且微乳液法合成的Ni/AC-50樣品與水熱法合成的CF/AC-200樣品對MB的吸附能力相差不大,而且Ms值也較接近,但是Ni/AC-50樣品中因Ni的氧化造成其穩(wěn)定性能相對較差,而且微乳液法制備方法相對較復雜。因此,本論文中,水熱法合成的CF/AC-200樣品具有最佳性能。最后,在優(yōu)化的CF/AC-200樣品的基礎上,繼續(xù)采用sol-gel法合成了Ti O2/Co Fe2O4/AC復合材料,結果顯示所有樣品不僅具有良好磁響應現(xiàn)象,同時保持了對MB的較好吸附能力,在紫外線照射下,能夠通過自身降解吸附的MB,具有光催化特性。研究表明,隨著二氧化鈦含量增加,其晶化程度增加,光催化降解MB性能增強。
[Abstract]:Activated carbon (AC) has developed pore structure, large specific surface area and Kong Rong. It has strong adsorption capacity for gases, small particle impurities, large molecular substances and heavy metal ions in the solution. At the same time, because of its developed pore structure and specific surface area, activated carbon is a fine template, and many functional materials (such as magnetic material). Material, photocatalyst, absorbing material, etc. can be loaded on the surface of activated carbon or into the channel of activated carbon. Thus, the active carbon composites with excellent properties are obtained. Magnetic activated carbon has a large specific surface area and excellent magnetic properties. It is an effective adsorbent for separating organic dyes in water. This paper uses different chemical formulas. Different magnetic medium loaded activated carbon composites were synthesized by the method. The adsorption behavior of the composite material to methylene blue (MB) was studied. The magnetic response and adsorption capacity of.1 were optimized by changing the ratio of magnetic medium to activated carbon. A series of magnetic CoxFey/Co Fe2O4/AC composites were successfully prepared by the sol-gel (sol-gel) method. All the samples have excellent magnetic response and strong adsorption ability to MB. The effects of the ratio of magnetic materials and activated carbon on the phase, magnetic properties and adsorption properties of CoxFey/Co Fe2O4/AC composites are studied. The study shows that the magnetic response of CoxFey /Co Fe2O4/AC composite is weakened with the increase of the proportion of AC, to MB The adsorption capacity of Co:Fe:AC was reduced, and the sample (CFA/AC-150) obtained by the molar ratio of 1:2:150 (CFA/AC-150) was better for its Ms (13.33 emu/g) and higher specific surface area (962.78 m2. G-1), which was more suitable for the treatment of dyestuff sewage, and the magnetic separation technology was used to quickly recover the magnetic activated carbon.2, and a hydrothermal method was used to synthesize the one. A series of Co Fe2O4/AC composites have good magnetic response and strong adsorption to MB. The effects of the molar ratio of magnetic materials and AC on the phase, magnetic properties and adsorption properties of Co Fe2O4/AC composites are studied. The study shows that the magnetic response of Co Fe2O4/AC composites decreases with the increase of the proportion of AC. At the same time, the adsorptive capacity of MB is reduced. At the same time, the sample (CF/AC-200) with the molar ratio of Co:Fe:AC to 1:2:200 (CF/AC-200) is suitable for Ms (5.11 emu/g) and the highest specific surface area (1096.85 m2. G-1), so it is more suitable for the treatment of dye sewage, and the magnetic separation technique can be used to quickly recover the magnetic activated carbon.3, using microemulsion method. A series of Ni/AC composites have been synthesized. All the samples have good magnetic response and strong adsorption ability to MB. The effects of the molar ratio of magnetic materials and AC on the phase, magnetic properties and adsorption properties of Ni/AC composites are studied. The results show that the magnetic response of Ni/AC composites is weakened with the increase of AC ratio. The adsorption capacity of MB was reduced. At the same time, the molar ratio of Ni:AC added at 1:50 (Ni/AC-50) was suitable for Ms (3.39 emu/g) and the highest specific surface area (1156.85 m2. G-1), which was more suitable for the treatment of dyestuff wastewater, and the magnetic separation technology could be used to quickly recover magnetic activated carbon. In addition, the study showed that sol-gel method was used. It will cause a certain damage to the pore structure of AC, thus reducing the specific surface area and total pore volume of magnetic activated carbon and reducing its adsorption capacity. The hydrothermal method and microemulsion method will not destroy the pore structure of AC, and the Ni/AC-50 samples synthesized by microemulsion and the CF/AC-200 samples synthesized by hydrothermal method have little difference between the adsorption capacity of MB and the Ms value. It is also close, but the stability of the Ni/AC-50 samples is relatively poor due to the oxidation of Ni, and the preparation method of microemulsion is relatively complex. Therefore, in this paper, the CF/AC-200 samples synthesized by hydrothermal method have the best performance. Finally, on the basis of the optimized CF/AC-200 samples, the sol-gel method is used to synthesize the Ti O2/Co Fe2O4/AC. The results show that all the samples not only have good magnetic response, but also maintain a good adsorption capacity for MB. Under UV irradiation, they can be adsorbed by their own MB and have the photocatalytic properties. The study shows that with the increase of titanium dioxide content, the crystallization degree increases and the photocatalytic degradation of MB is enhanced.

【學位授予單位】：中國計量學院
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ424.1;TB33

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