Gas-phase Combustion Synthesis of TiO2 Nanoparticles with TTIP in Premixed Flat Flame
Date Issued
2005
Date
2005
Author(s)
Liao, Sze-Han
DOI
zh-TW
Abstract
Nanotechnology is the promisingly rising technology. Massive attention from countries around the world has appealed lots resources and money in related research. Photocatalyst (TiO2) is presently and widely used with its strong comprehension of oxidation, decomposition, atmospheric purification, deodorization, water purification, and stability. This research is to study the formation mechanism of nanosized TiO2 particles through gas-phase combustion synthesis because its high flame temperature brings fine self-purifying, homologous nucleation, and continuously uniform producing. Also, a new precursor, TTIP, is introduced to replace the conventional corrodible precursor, TiCl4. Flame temperature profile, TiO2 crystallinity, and particle size are studied under different burners, concentration of precursor, O2/N2 molar ratio, and flow rate. The results show that significant variations on the flame structure occur in different burners, leading to a further influence on temperature distribution, crystallinity and particle size of product. When O2/N2 molar ratio rises, the Anatase wt% grows. The rise of TTIP concentration leads to a climb of Rutile wt%. The range of TiO2 particle size averages from 100nm to 500nm under different operation parameters in flat flame burner while the smallest is about 40nm. In Bunsen burner, the particle size distributes wider and larger, and it shows better comprehension in crystallinity control than flat flame burner which produces smaller and more uniform particles due to its short constant flame structure.
Subjects
二氧化鈦
平板式
火燄
本生式
晶相
奈米
粒徑
預混
甲烷
合成
燃燒
TiO2
titania
bunsen
crystalline
nano
combustion
burner
synthesis
flat
flame
premixed
particle
methan
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-94-R92522115-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):d9c91cb349b36c646e2c1e2d7c7ebe89