A modulated photoluminescence nanosensor was developed for the quantitative detection of formaldehyde with nitrogen-doped graphene quantum dots and melamine. The sensing system was based on the different activated eff...A modulated photoluminescence nanosensor was developed for the quantitative detection of formaldehyde with nitrogen-doped graphene quantum dots and melamine. The sensing system was based on the different activated effects of melamine and hydrogen peroxide on the photoluminescence intensity of nitrogendoped graphene quantum dots. Under the optimal conditions, the modulated photoluminescence sensing system can be used to detect formaldehyde with a good linear relationship between the nitrogen-doped graphene quantum dots photoluminescence difference and the concentration of formaldehyde. The novel sensing system provided new directions for the detection of formaldehyde with high selectivity and quick response.展开更多
Titanium dioxide（TiO2） nanowires with different crystal structures were successfully synthesized, and their charge transfer properties were further investigated by surface photovoltage（SPV）, transient photovoltage...Titanium dioxide（TiO2） nanowires with different crystal structures were successfully synthesized, and their charge transfer properties were further investigated by surface photovoltage（SPV）, transient photovoltage（TPV） and surface photoeurrent（SPC） techniques. The results reveal that both the surface states and the charge transfer rate of different TiO2 nanowires are highly dependent on their crystal structures.展开更多
基金Funded by the National Natural Science Foundation of China(Nos.21275063 and 21005029)the Development and Reform Commission of Jilin Province(No.2015Y048)the Youth Science Fund of Jilin Province(20140520081JH)
文摘A modulated photoluminescence nanosensor was developed for the quantitative detection of formaldehyde with nitrogen-doped graphene quantum dots and melamine. The sensing system was based on the different activated effects of melamine and hydrogen peroxide on the photoluminescence intensity of nitrogendoped graphene quantum dots. Under the optimal conditions, the modulated photoluminescence sensing system can be used to detect formaldehyde with a good linear relationship between the nitrogen-doped graphene quantum dots photoluminescence difference and the concentration of formaldehyde. The novel sensing system provided new directions for the detection of formaldehyde with high selectivity and quick response.
基金Supported by the National Natural Science Foundation of China（No.51272089） and the Science and Technology Development Project of Jilin Province, China（No.20130522143JH）.
文摘Titanium dioxide（TiO2） nanowires with different crystal structures were successfully synthesized, and their charge transfer properties were further investigated by surface photovoltage（SPV）, transient photovoltage（TPV） and surface photoeurrent（SPC） techniques. The results reveal that both the surface states and the charge transfer rate of different TiO2 nanowires are highly dependent on their crystal structures.
