利用微晶纤维素制备C-TiO_2及其对Cd~(2+)吸附性能研究
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- 英文论文题名：Preparation of C-TiO_2 by microcrystalline cellulose and study on adsorption properties to Cd~(2+)
- 论文作者：邹晓航 ; 商旭婷 ; 郭元茹
- 英文论文作者：Xiao-Hang Zou ; Xu-Ting Shang ; Yuan-Ru Guo ; Key Laboratory of Bio-based Material Science & Technology (Ministry of Education) ; College of Material Science and Engineering ; Northeast Forestry University
- 年：2016
- 作者机构：东北林业大学生物质材料科学与技术教育部重点实验室材料科学与工程学院;
- 论文关键词：微晶纤维素 ; TiO2 ; 镉离子 ; 吸附
- 英文论文关键词：Microcrystalline cellulose ; TiO2 ; Cd2+ ; Adsorption
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十九分会：纳米碳材料
- 语种：中文
- 分类号：O647.3
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十九分会 ; 纳米碳材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：253k
- 原文格式：D
- 会议级别：全国
摘要
由于掺杂型TiO_2具有优异的物理化学性质,我们利用微晶纤维素辅助制备碳掺杂二氧化钛纳米晶体。XRD结果表明,添加微晶纤维素制备的C-TiO_2样品均具有较高的结晶度,为锐钛矿相二氧化钛,同时存在石墨相碳。随着微晶纤维素用量的增加石墨碳的衍射峰逐渐增强,说明C-TiO_2样品中的石墨碳含量逐渐增加。SEM、TEM和XPS分析表明,微晶纤维素的加入对C-TiO_2样品的形貌没有显著的影响,但会提高其分散程度,同时,微晶纤维素成谈后会有部分碳进入到二氧化钛的晶格中。C-TiO_2样品对镉离子的吸附实验表明,微晶纤维素的加入与否对吸附等温线的类型没有影响,仍然是Freundlich模型,但吸附速率增加,吸附效率提高。同时,在实验范围内测得的Freundlich模型的n值全部大于1,说明样品在较高的浓度下更有利于吸附过程的进行。
Carbon doped TiO_2 nanocrystals were prepared by microcrystalline cellulose. The results of XRD showed that all C-TiO_2 have the structure of anatase with high crystallinity. Graphite carbon also appeared C-TiO_2 and the diffraction of graphite carbon become stronger when more cellulose used during the preparation. SEM、TEM and XPS evidenced that using cellulose won't affect the morphology of C-TiO_2, but it would improve the dispersity of the particles. Carbon exits in the TiO_2 latice as heteroatoms and in TiO_2 as second phase. The results of Cd~(2+) adsorption experiments showed the same adsorption properties weather TiO_2 prepared by adding cellulose or not, but both the rate and the efficiency of C-TiO_2 increased if cellulose was used. The values of n in Freundlich model are larger than 1, which indicated adsorption preferred high Cd~(2+) concentration.
Carbon doped TiO_2 nanocrystals were prepared by microcrystalline cellulose. The results of XRD showed that all C-TiO_2 have the structure of anatase with high crystallinity. Graphite carbon also appeared C-TiO_2 and the diffraction of graphite carbon become stronger when more cellulose used during the preparation. SEM、TEM and XPS evidenced that using cellulose won't affect the morphology of C-TiO_2, but it would improve the dispersity of the particles. Carbon exits in the TiO_2 latice as heteroatoms and in TiO_2 as second phase. The results of Cd~(2+) adsorption experiments showed the same adsorption properties weather TiO_2 prepared by adding cellulose or not, but both the rate and the efficiency of C-TiO_2 increased if cellulose was used. The values of n in Freundlich model are larger than 1, which indicated adsorption preferred high Cd~(2+) concentration.
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