Continuous Generation of TiO 2 Nanoparticles by an Atmospheric Pressure Plasma-Enhanced Process
Continuous Generation of TiO 2 Nanoparticles by an Atmospheric Pressure Plasma-Enhanced Process
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DOI：
10.1080/02786820701694355
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发表时间：
2007-10
影响因子：
5.2
通讯作者：
Chienchih Chen;H. Bai;H. Chein;T. Chen
中科院分区：
文献类型：
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作者：
Chienchih Chen;H. Bai;H. Chein;T. Chen
提出了一种以四异丙醇钛（TTIP）和水为前驱体，利用介质阻挡放电连续制备二氧化钛（TiO 2）纳米粒子的新方法。气溶胶发生器采用交流（AC）的大气压等离子体增强纳米颗粒合成（APPENS）工艺。通过SEM、XRD和SMPS分析，研究了外加电压、频率和前驱物摩尔比对产物的影响。结果表明，当不施加电压时，TiO2颗粒似乎在一个较宽的尺寸范围内的双峰分布。而在施加AC等离子体后，它们变成单峰分布，平均尺寸范围为约30至60 nm。可以调节所施加的电频率以在等离子体反应器之后生成纳米颗粒或在反应器中形成薄膜。前体摩尔比的增加导致具有更宽尺寸分布的更大颗粒。
A novel method for the continuous generation of titanium dioxide (TiO2) nanoparticles by dielectric barrier discharge process is presented using titanium tetraisopropoxide (TTIP) and water as precursors. The aerosol generator employs an atmospheric pressure plasma enhanced nanoparticle synthesis (APPENS) process of alternative current (AC). The influences of applied voltage, frequency and precursor molar ratio on the generated particles were described by the SEM, XRD, and SMPS analyses. The results showed that TiO2 particles appear to be in a broad size range of bi-modal distribution when no voltage is applied. While after applying the AC plasma they become uni-modal distributed with average sizes range from around 30 to 60 nm. The applied electric frequency can be adjusted to either generate nanoparticles after the plasma reactor or develop a thin film in the reactor. An increase in the precursor molar ratio leads larger particles with a broader size distribution.