Fluorescence of ZnO/carbon mixture and application in acid rain detection

Liu, Kai‐Kai; Shan, Chongxin; Liu, Hongzhen; Lou, Qing; Shen, Dezhen

doi:10.1039/c6ra26523e

Cited by 8 publications

(5 citation statements)

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“…This might be due to the influence of surface modification. 32 Because APTES is modified on the surface of quantum dots. In the high-resolution spectrum of O 1s, there are two peaks in O 1s, one at 530. for the XPS spectra are consistent with those for the FTIR spectra.…”

Section: Resultsmentioning

confidence: 99%

“…The binding energy position of Zn 2p 3/2 is 1021.6 eV, which is 0.2 eV lower than the standard peak position of Zn(II) in ZnO (1021.8 eV). This might be due to the influence of surface modification . Because APTES is modified on the surface of quantum dots.…”

Section: Resultsmentioning

confidence: 99%

“…Water-soluble APTES-coated ZnO QDs were synthesized by a simple sol–gel method. 32 In brief, 16.7 mmol zinc acetate dihydrate was dissolved in 50 mL of ethanol solution followed by vigorous stirring and refluxed for 2 h at 78 °C. When zinc acetate was completely dissolved, the above solution was placed in a cold bath at room temperature.…”

Section: Experimental Sectionmentioning

confidence: 99%

“…Water-soluble APTES-coated ZnO QDs were synthesized by a simple sol–gel method . In brief, 16.7 mmol zinc acetate dihydrate was dissolved in 50 mL of ethanol solution followed by vigorous stirring and refluxed for 2 h at 78 °C.…”

Section: Experimental Sectionmentioning

confidence: 99%

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Dose-Dependent Effect of ZnO Quantum Dots for Lettuce Growth

Liang

Pan

et al. 2021

ACS Omega

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As the cadmium-free semiconductor quantum dots, ZnO quantum dots (ZnO QDs) have wide potential applications in agriculture. However, the effects of ZnO quantum dots on crop growth and nutritional quality have not been fully studied. In this work, the lettuce was sprayed with different concentrations of ZnO QDs from 50 to 500 mg·L –1 to evaluate their influence on lettuce antioxidant, biomass, and nutritional quality. The results showed that ZnO QDs existed in the lettuce in the form of Zn 2+ . Lettuce treated with 500 mg·L –1 ZnO QDs would produce a large amount of reactive oxygen species (ROS), which adversely affected the absorption of nutrients, soluble protein content, and chlorophyll content, thus reducing plant biomass. When the concentrations range from 50 to 200 mg·L –1 , the antioxidant enzyme systems of lettuce were triggered to counteract the damage caused by excessive ROS. Moreover, ZnO QDs at this level promoted Ca, Mg, Fe, Mn, Zn, and B absorption and accumulation; increased soluble sugar content; and improved the lettuce biomass and nutritional quality.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

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Dose-Dependent Effect of ZnO Quantum Dots for Lettuce Growth

Liang

Pan

et al. 2021

ACS Omega

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“…[11] Fluorescence methods have attracted wide attention for their advantages such as visualization, high signalto-noise ratio, and good sensitivity. [12] At present, fluorescent materials mainly include metal sulfides, metal nitrides, organic dyes, and rare earth complexes. [13] Among them, the rare earth Eu complexes have a strong and pure red light, a high luminescence quantum yield, and a very narrow emission peak which has aroused great interest in the field of light conversion.…”

Section: Introductionmentioning

confidence: 99%

Ethyl Cellulose/Rare Earth Complexes Light‐Conversion Films and Exploration in Acid Rain Detection

Zhang

et al. 2021

Macro Materials & Eng

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Generally, precipitation with pH less than 5.6 is considered acid rain, which will have adverse effects on water, soil, animals, and plants, etc, therefore, rapid detection of acid rain is of great significance. In this work, the rare earth europium is combined with 4,4,4-trifluoro-1-phenyl-1,3-butanedione to obtain the Eu 3+ complex, Eu(BTA) 3 (H 2 O) 2 . As an auxiliary ligand and matrix, ethyl cellulose avoided the fluorescence quenching caused by uneven dispersion of the complex in the matrix and while sensitizing the fluorescence of Eu 3+ . The rare earth complex light-conversion film is successfully prepared. The results showed that the film has good responsiveness to pH value. In the process of neutral to acidic aqueous solution, the fluorescence is gradually quenched and exhibits a good linear relationship, when the aqueous solution changed from acid to neutral, the fluorescence will be restored, and the fluorescence intensity can still maintain above 90% after 5 repetitions. In addition, the light-conversion film has excellent light conversion ability and high color purity. It can transform harmful ultraviolet light into red light which is conducive to photosynthesis, as well as prevent damage of acid rain to plants and has a certain positive effect on agricultural production.

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