CAJ | 학술논문

采用光化学还原方法制备了图案化的石墨烯薄膜。研究了光还原氧化石墨烯薄膜( PRGO)的热稳定性和发光性质。热重分析(TGA)结果表明，光化学还原主要引起氧化石墨烯(GO)氧化基团的减少，而对GO内水含量影响较小；发光( PL)测试结果表明，不同激发条件下， PRGO的发光与GO相比表现出了不同的变化规律：在波长514 nm的光激发下， PRGO的发光强度比GO明显降低，同时伴随着发光峰峰位红移；而在波长830 nm的光激发下， PRGO的发光强度比GO略有增强，并且发光峰峰位无明显变化，此结果表明不同尺寸的碳团簇局域态( sp2 C团簇)的光还原反应活性不同，这与GO特殊的能带结构密切相关。
채용광화학환원방법제비료도안화적석묵희박막。연구료광환원양화석묵희박막( PRGO)적열은정성화발광성질。열중분석(TGA)결과표명，광화학환원주요인기양화석묵희(GO)양화기단적감소，이대GO내수함량영향교소；발광( PL)측시결과표명，불동격발조건하， PRGO적발광여GO상비표현출료불동적변화규률：재파장514 nm적광격발하， PRGO적발광강도비GO명현강저，동시반수착발광봉봉위홍이；이재파장830 nm적광격발하， PRGO적발광강도비GO략유증강，병차발광봉봉위무명현변화，차결과표명불동척촌적탄단족국역태( sp2 C단족)적광환원반응활성불동，저여GO특수적능대결구밀절상관。
Graphene film pattern was prepared by photo-chemical reduction. The thermal stability and photo-luminescence( PL) properties of photo-chemical reduction graphene oxide(PRGO) were studied. Thermo-gravimetric analysis( TGA) results show that the photochemical reduction mainly causes the decrease of oxida-tion groups in the graphene oxide( GO) sheets, but has little effect on the water content in GO. PL results show that the emission of PRGO is obviously different from those of common-method-made GO when different laser wavelengths are used for excitation. When excited with 514 nm laser, the PL intensity of PRGO was lower than that of GO, accompanied with a red-shift of emission peak. In contrast, when an 830 nm laser is used, the PL intensity of PRGO is slightly higher than that of GO while the PL center positions are similar. The results indicate that the sp2 C clusters with different sizes have different photoreduction activity, which is closely related to the unique band structures of GO.