CAJ | 학술논문

本文利用一种绿色合成工艺，采用巯基乙酸作为配体，在水溶液中成功合成了水溶性的Cu∶CdS纳米晶。利用X射线衍射分析( XRD)、傅里叶变换红外光谱( FT-IR)、场发射扫描电镜显微分析( FE-SEM)、能量色散X射线谱( EDX)、紫外可见( UV-Vis)吸收光谱对样品的晶体学性质、结构、形貌、成分、吸收光谱性质进行了系统的研究。着重研究了掺杂浓度对Cu∶CdS纳米晶的晶体学性质及吸收光谱的影响。结果表明：合成的Cu∶CdS纳米晶为立方相，通过谢乐公式估算的平均晶粒尺寸约为2 nm；随着掺杂浓度的增加，产物的晶胞参数也逐渐增大，表明Cu离子已经掺入到CdS纳米晶中，该发现与EDX结果相吻合。 FT-IR红外光谱发现，配体巯基乙酸成功包覆在纳米晶的表面。 UV-vis吸收谱表明，掺杂后的Cu∶CdS纳米晶的吸收峰向长波长方向移动。这种红移主要是Cu离子在CdS纳米晶中的掺杂而形成电子能级跃迁所致。
본문이용일충록색합성공예，채용구기을산작위배체，재수용액중성공합성료수용성적Cu∶CdS납미정。이용X사선연사분석( XRD)、부리협변환홍외광보( FT-IR)、장발사소묘전경현미분석( FE-SEM)、능량색산X사선보( EDX)、자외가견( UV-Vis)흡수광보대양품적정체학성질、결구、형모、성분、흡수광보성질진행료계통적연구。착중연구료참잡농도대Cu∶CdS납미정적정체학성질급흡수광보적영향。결과표명：합성적Cu∶CdS납미정위립방상，통과사악공식고산적평균정립척촌약위2 nm；수착참잡농도적증가，산물적정포삼수야축점증대，표명Cu리자이경참입도CdS납미정중，해발현여EDX결과상문합。 FT-IR홍외광보발현，배체구기을산성공포복재납미정적표면。 UV-vis흡수보표명，참잡후적Cu∶CdS납미정적흡수봉향장파장방향이동。저충홍이주요시Cu리자재CdS납미정중적참잡이형성전자능급약천소치。
In this paper,we report a green synthetic route for water-soluble Cu∶CdS nanocrystals in aqueous media using the mer-captoacetic acid ligand as ligand. The crystallography properties, structure, morphology, composition, element distribution and ab-sorption properties of the resulting Cu∶CdS nanocrystals were systematically researched using X-ray diffraction( XRD) ,Fourier in-frared spectrum( FTIR) ,field emission scanning electron microscopy( FE-SEM) ,energy dispersive X-ray( EDX) spectroscopy,ultra-violet visible( UV-vis) absorption spectroscopy. In this work,we mainly focus on the effects of doping concentration on the crystallog-raphy properties and absorption spectra of Cu∶CdS nanocrystals. Experimental results show that the obtained Cu∶CdS nanocrystals present cubic phase,the mean grain size is about 2 nm estimated from scherrer's formula. The lattice parameters of the products also increase gradually with the increase of doping concentration,showing that Cu ions have been doped into the CdS nanocrystals,which is consistent with the results of EDX. FTIR infrared spectra manifest that ligand thioglycolic acid was successfully coated onto the surface of Cu∶CdS nanocrystals. UV-vis absorption spectra demonstate that the absorption peak of the Cu∶CdS nanocrystals shifts to longer wavelengths. This redshift is mainly ascribed to the formation of electron energy level transitions by doping of Cu ions into the CdS nanocrystals.