CAJ | 학술논문

采用化学浴沉积法制备了碱式硫酸锌(ZSH)纳米片,并经1000°C煅烧处理得到了ZnO多孔片.详细研究了ZSH在Zn2+-六亚甲基四胺前驱体溶液体系中的形成机理、ZSH的热解过程、ZnO的结晶性、微结构以及光致发光性能.结果表明,所得ZnO多孔片呈规则六角形状,其尺寸为10-50μm,厚度为200-500 nm,由于高温固相反应中传质等因素的限制,构成薄片的ZnO晶粒呈多边形或不规则形貌,晶粒间的孔为亚微米孔,尺寸在100-500 nm范围. ZnO多孔薄片结晶性良好,在388 nm处表现出较强紫外发光,无可见光区的缺陷发光.机理分析表明, SO2-4与Zn2+的高亲和力是Zn2+-六亚甲基四胺体系中ZSH生成的根本原因,而ZSH的热分解过程对ZnO多孔片的形貌和微结构影响显著.本研究提出了一种制备高结晶质量ZnO多孔材料的新方法,所得ZnO多孔片可望在催化、染料敏化太阳能电池、紫外光电器件等领域得到应用.
채용화학욕침적법제비료감식류산자(ZSH)납미편,병경1000°C단소처리득도료ZnO다공편.상세연구료ZSH재Zn2+-륙아갑기사알전구체용액체계중적형성궤리、ZSH적열해과정、ZnO적결정성、미결구이급광치발광성능.결과표명,소득ZnO다공편정규칙륙각형상,기척촌위10-50μm,후도위200-500 nm,유우고온고상반응중전질등인소적한제,구성박편적ZnO정립정다변형혹불규칙형모,정립간적공위아미미공,척촌재100-500 nm범위. ZnO다공박편결정성량호,재388 nm처표현출교강자외발광,무가견광구적결함발광.궤리분석표명, SO2-4여Zn2+적고친화력시Zn2+-륙아갑기사알체계중ZSH생성적근본원인,이ZSH적열분해과정대ZnO다공편적형모화미결구영향현저.본연구제출료일충제비고결정질량ZnO다공재료적신방법,소득ZnO다공편가망재최화、염료민화태양능전지、자외광전기건등영역득도응용.
@@@@Highly crystal ine, porous ZnO sheets were prepared from chemical y-deposited zinc sulfate hydroxide hydrate (ZSH) sheets by sintering at 1000 °C. The formation mechanism of ZSH in Zn2+-hexamethyltetramine (HMT) precursor system, the transformation process of ZSH to ZnO, and the crystal ine, microstructural and optical properties of the ZnO sheets were investigated. The porous ZnO sheets possessed a wel-defined hexagonal shape with control able size (10-50 μm) and thickness (200-500 nm), high crystal inity, and strong ultraviolet photoluminescence without detectable defect-related visible emission. Submicron-sized pores (100-500 nm) and polygonal or irregular ZnO particles resulting from the limited mass transport during high temperature sintering were observed in the ZnO sheets. Analysis of the formation mechanism indicated that the high affinity of SO2-4 for Zn2+was responsible for the formation of ZSH in the Zn2 +-HMT precursor system, and the thermolysis of ZSH affected the morphology and microstructure of the ZnO sheets. This work reveals a facile route to porous ZnO nanostructures with good crystal inity and optical properties, which make them suitable for application in catalysis, and photo and/or electrical devices.