Photocatalytic efficiency of zinc oxide prepared using natural polysaccharides
碩士 === 國立中央大學 === 環境工程研究所 === 98 === Photocatalysts are kind of catalyst that can be irradiated by light and generate free radicals, and this kind of radicals will attack target pollutants using redox method for degradation of pollutants. This study investigated the preparation of zinc oxide catalys...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Others |
Language: | zh-TW |
Published: |
2010
|
Online Access: | http://ndltd.ncl.edu.tw/handle/85510959404095195850 |
id |
ndltd-TW-098NCU05515038 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-TW-098NCU055150382016-04-20T04:18:03Z http://ndltd.ncl.edu.tw/handle/85510959404095195850 Photocatalytic efficiency of zinc oxide prepared using natural polysaccharides 由多醣體製備之氧化鋅其光催化效率之研究 Fang-mai Yang 楊芳玫 碩士 國立中央大學 環境工程研究所 98 Photocatalysts are kind of catalyst that can be irradiated by light and generate free radicals, and this kind of radicals will attack target pollutants using redox method for degradation of pollutants. This study investigated the preparation of zinc oxide catalyst in different conditions using different polysaccharide and its efficiency of photocatalytic degradation of three kinds of pollutants such as methylene blue, crystal violet, and congo red. Zinc oxide was prepared using different natural polysaccharides such as alginate, chitosan, and corn starch. Comparison of the photocatalytic efficiency of zinc oxide prepared using natural polysaccharides indicated that: (a) preparation was independent of ratio of composition; (b) 450 ℃ was the best calcination temperature of zinc oxide; (c) different additives will generate different effects among different polysaccharides used to prepared zinc oxide ; (d) the best photocatalytic efficiency was obtained for sodium alginate and corn starch with conditions for the photocatalytic circulating water temperature was 30 ℃,when the concentration of pollutants is low, the better photocatalytic effect was obtained. The experimental results showed that photocatalytic activity decrease on exposure time, catalyst’s dosage and pH. Jiunn-Fwu Lee 李俊福 2010 學位論文 ; thesis 127 zh-TW |
collection |
NDLTD |
language |
zh-TW |
format |
Others
|
sources |
NDLTD |
description |
碩士 === 國立中央大學 === 環境工程研究所 === 98 === Photocatalysts are kind of catalyst that can be irradiated by light and generate free radicals, and this kind of radicals will attack target pollutants using redox method for degradation of pollutants. This study investigated the preparation of zinc oxide catalyst in different conditions using different polysaccharide and its efficiency of photocatalytic degradation of three kinds of pollutants such as methylene blue, crystal violet, and congo red.
Zinc oxide was prepared using different natural polysaccharides such as alginate, chitosan, and corn starch. Comparison of the photocatalytic efficiency of zinc oxide prepared using natural polysaccharides indicated that: (a) preparation was independent of ratio
of composition; (b) 450 ℃ was the best calcination temperature of zinc oxide; (c) different additives will generate different effects among different polysaccharides used to prepared zinc oxide ; (d) the best photocatalytic efficiency was obtained for sodium alginate and corn starch with conditions for the photocatalytic circulating water temperature was 30 ℃,when the concentration of pollutants is low, the better photocatalytic effect was obtained. The experimental results showed that photocatalytic activity decrease on exposure time, catalyst’s dosage and
pH.
|
author2 |
Jiunn-Fwu Lee |
author_facet |
Jiunn-Fwu Lee Fang-mai Yang 楊芳玫 |
author |
Fang-mai Yang 楊芳玫 |
spellingShingle |
Fang-mai Yang 楊芳玫 Photocatalytic efficiency of zinc oxide prepared using natural polysaccharides |
author_sort |
Fang-mai Yang |
title |
Photocatalytic efficiency of zinc oxide prepared using natural polysaccharides |
title_short |
Photocatalytic efficiency of zinc oxide prepared using natural polysaccharides |
title_full |
Photocatalytic efficiency of zinc oxide prepared using natural polysaccharides |
title_fullStr |
Photocatalytic efficiency of zinc oxide prepared using natural polysaccharides |
title_full_unstemmed |
Photocatalytic efficiency of zinc oxide prepared using natural polysaccharides |
title_sort |
photocatalytic efficiency of zinc oxide prepared using natural polysaccharides |
publishDate |
2010 |
url |
http://ndltd.ncl.edu.tw/handle/85510959404095195850 |
work_keys_str_mv |
AT fangmaiyang photocatalyticefficiencyofzincoxidepreparedusingnaturalpolysaccharides AT yángfāngméi photocatalyticefficiencyofzincoxidepreparedusingnaturalpolysaccharides AT fangmaiyang yóuduōtángtǐzhìbèizhīyǎnghuàxīnqíguāngcuīhuàxiàolǜzhīyánjiū AT yángfāngméi yóuduōtángtǐzhìbèizhīyǎnghuàxīnqíguāngcuīhuàxiàolǜzhīyánjiū |
_version_ |
1718228378058752000 |