光谱学与光谱分析
光譜學與光譜分析
광보학여광보분석
SPECTROSCOPY AND SPECTRAL ANALYSIS
2010年
5期
1257-1260
,共4页
邵铮铮%张学骜%王晓峰%常胜利
邵錚錚%張學驁%王曉峰%常勝利
소쟁쟁%장학오%왕효봉%상성리
ZnO%多孔微球%Zn-柠檬酸配合物%拉曼光谱
ZnO%多孔微毬%Zn-檸檬痠配閤物%拉曼光譜
ZnO%다공미구%Zn-저몽산배합물%랍만광보
ZnO%Porous microspherea%Zn-citrate complex%Raman spectrum
利用拉曼光谱方法,对柠檬酸钠辅助水热合成纳米结构多孔ZnO微球的机理进行了研究.样品的拉曼光谱特征显示,多孔ZnO微球中存在Zn-柠檬酸配合物;分析表明反应溶液中柠檬酸钠水解产生的柠檬酸根与Zn2+结合形成Zn-柠檬酸配合物,该配合物化学吸附在Zn(OH)2晶核的(204)和(503)晶面,使Zn(OH)2晶核择优生长形成纳米薄片状结构;水热过程中Zn(OH)2微晶团聚形成纳米片状结构多孔Zn(OH)2微球并以沉淀析出.研究发现吸附在薄片表面的Zn-柠檬酸配合物提高了Zn(OH)2微晶的热稳定性,使得Zn(OH)2的分解温度高于200℃,加热到300℃后Zn(OH)2完全分解获得纳米结构多孔ZnO微球.
利用拉曼光譜方法,對檸檬痠鈉輔助水熱閤成納米結構多孔ZnO微毬的機理進行瞭研究.樣品的拉曼光譜特徵顯示,多孔ZnO微毬中存在Zn-檸檬痠配閤物;分析錶明反應溶液中檸檬痠鈉水解產生的檸檬痠根與Zn2+結閤形成Zn-檸檬痠配閤物,該配閤物化學吸附在Zn(OH)2晶覈的(204)和(503)晶麵,使Zn(OH)2晶覈擇優生長形成納米薄片狀結構;水熱過程中Zn(OH)2微晶糰聚形成納米片狀結構多孔Zn(OH)2微毬併以沉澱析齣.研究髮現吸附在薄片錶麵的Zn-檸檬痠配閤物提高瞭Zn(OH)2微晶的熱穩定性,使得Zn(OH)2的分解溫度高于200℃,加熱到300℃後Zn(OH)2完全分解穫得納米結構多孔ZnO微毬.
이용랍만광보방법,대저몽산납보조수열합성납미결구다공ZnO미구적궤리진행료연구.양품적랍만광보특정현시,다공ZnO미구중존재Zn-저몽산배합물;분석표명반응용액중저몽산납수해산생적저몽산근여Zn2+결합형성Zn-저몽산배합물,해배합물화학흡부재Zn(OH)2정핵적(204)화(503)정면,사Zn(OH)2정핵택우생장형성납미박편상결구;수열과정중Zn(OH)2미정단취형성납미편상결구다공Zn(OH)2미구병이침정석출.연구발현흡부재박편표면적Zn-저몽산배합물제고료Zn(OH)2미정적열은정성,사득Zn(OH)2적분해온도고우200℃,가열도300℃후Zn(OH)2완전분해획득납미결구다공ZnO미구.
Raman spectrum was applied to analyze the synthesis mechanism of nanostructure porous ZnO microspheres prepared via hydrothermal method assisted with trisodium citrate.The Raman spectrum characteristics of the sample revealed that the ZnO microspheres contained Zn-citrate complex,which was the complex of citrate acid group and Zn2+ in the reaction solution.The complex was chemisorbed on (204) and (503) faces of the Zn(OH)2 crystallite in the reacting solution,resulting in Zn(OH)2 nanosheat from the crystallite.Large quantities of Zn(OH)2 nanosheets aggregated as porous microspheres in hydrothermal process.Zn-citrate complex chemisorbed on the nanoshect improved the thermal stability of Zn(OH)2,which means a decomposition temperature over 200 ℃.Nanostructure porous ZnO microspheres were obtained by heating Zn(OH)2 microspheres at 300 ℃ and the nanosheet structure was maintained.