CAJ | 학술논문

在溶胶-凝胶合成过程中，分别利用超声波处理ZnO溶胶、加水至溶胶中煮沸、加庚烷至溶胶中、蒸发除去部分溶剂等简单的沉淀方法制备了10 nm以下不同尺寸的ZnO颗粒．在60℃下通过超声波处理ZnO溶胶可得到高质量的ZnO纳米颗粒，颗粒粒径为6．2±1．5 nm，标准偏差为8％．同时，基于作者以前的发现，提出了在该溶胶-凝胶法中新的ZnO形成机理．在光催化降解甲基橙过程中，纳米ZnO不同的颗粒尺寸及团聚情况导致其光催化活性有所差异，具有较小粒径和团聚较轻的ZnO纳米颗粒显示出较高的光催化活性．
재용효-응효합성과정중，분별이용초성파처리ZnO용효、가수지용효중자비、가경완지용효중、증발제거부분용제등간단적침정방법제비료10 nm이하불동척촌적ZnO과립．재60℃하통과초성파처리ZnO용효가득도고질량적ZnO납미과립，과립립경위6．2±1．5 nm，표준편차위8％．동시，기우작자이전적발현，제출료재해용효-응효법중신적ZnO형성궤리．재광최화강해갑기등과정중，납미ZnO불동적과립척촌급단취정황도치기광최화활성유소차이，구유교소립경화단취교경적ZnO납미과립현시출교고적광최화활성．
ZnO nanoparticles with different sizes less than 10 nm could be prepared by diverse fac-ile precipitation methods including sonicating ZnO sol , adding water to the sol and then boiling it , adding heptane to the sol , and evaporating part solvent of the sol during a sol-gel synthesis procedure , respec-tively.Sonicating the ZnO sol at 60 ℃led to the highest quality ZnO nanoparticles with the particle di-ameter of 6 .2 ±1 .5 nm and standard deviation of about 8%.Meanwhile , on the basis of our previous findings, a new mechanism for the formation of ZnO nanocrystals via the sol-gel route was proposed .In the photocatalytic degradation of methyl orange , the different sizes and agglomeration situations resulted in the difference of catalytic activities of ZnO nanoparticles , among which those with smaller particle sizes and less agglomerations exhibited higher photocatalytic activities .