The removal of formaldehyde (HCHO) from indoor air is of great importance to reduce health risks and improve indoor air quality. In this study, nano-Cu2O-loaded paper with superior photocatalytic activity under visibl...The removal of formaldehyde (HCHO) from indoor air is of great importance to reduce health risks and improve indoor air quality. In this study, nano-Cu2O-loaded paper with superior photocatalytic activity under visible light for the removal of HCHO was fabricated through a green, simple, and fast in situ synthesis method. The optimum preparation conditions for nano-Cu2O-loaded paper were as follows: 2 g (oven-dry basis) cellulose fibers, CuSO4 dosage 8 g, NaOH dosage 1.6 g, temperature 80℃, 60 min for Cu2+ absorption, and 60 min for reaction. Under the optimum conditions, the Cu2O deposition ratio approached 30% and the nano-Cu2O-loaded paper exhibited a catalytic efficiency of approximately 97% for HCHO removal. The photocatalytic capacity of nano-Cu2O-loaded paper for HCHO removal had a positive correlation with the deposition ratio of nano Cu2O particles. Excellent antibacterial property of nano- Cu2O-loaded paper against Staphylococcus aureus and Escherichia coli was also confirmed. Moreover, nano-Cu2O-loaded paper was proven to be hydrophobic.展开更多
The drug-containing culture medium method for the test of toxicity was adopted to compare inhibitive effects of original nano-Cu2O drug and nano-Cu2O suspension, and nano-Cu2O drug has better inhibitive effects on sna...The drug-containing culture medium method for the test of toxicity was adopted to compare inhibitive effects of original nano-Cu2O drug and nano-Cu2O suspension, and nano-Cu2O drug has better inhibitive effects on snake melon Botry- tis cinerea than original nano-Cu2O drug with the same mass concentration, and inhibitory effects are positively correlated with concentration. Correlation coefficients of the toxicity regression equation are 0.892 2 and 0.996 1, effective concentration EC50 of original nano-Cu2O drug and that of nano-Cu2O suspension are 3 948.9 and 167.9 mg/kg. Original nano-Cu2O drug has an inhibitive effect on snake melon Botrytis cinerea, but the inhibition of nano-Cu2O suspension is more obvious.展开更多
基金financial support from the National Natural Science Foundation of China, with grant No. 31770620
文摘The removal of formaldehyde (HCHO) from indoor air is of great importance to reduce health risks and improve indoor air quality. In this study, nano-Cu2O-loaded paper with superior photocatalytic activity under visible light for the removal of HCHO was fabricated through a green, simple, and fast in situ synthesis method. The optimum preparation conditions for nano-Cu2O-loaded paper were as follows: 2 g (oven-dry basis) cellulose fibers, CuSO4 dosage 8 g, NaOH dosage 1.6 g, temperature 80℃, 60 min for Cu2+ absorption, and 60 min for reaction. Under the optimum conditions, the Cu2O deposition ratio approached 30% and the nano-Cu2O-loaded paper exhibited a catalytic efficiency of approximately 97% for HCHO removal. The photocatalytic capacity of nano-Cu2O-loaded paper for HCHO removal had a positive correlation with the deposition ratio of nano Cu2O particles. Excellent antibacterial property of nano- Cu2O-loaded paper against Staphylococcus aureus and Escherichia coli was also confirmed. Moreover, nano-Cu2O-loaded paper was proven to be hydrophobic.
文摘The drug-containing culture medium method for the test of toxicity was adopted to compare inhibitive effects of original nano-Cu2O drug and nano-Cu2O suspension, and nano-Cu2O drug has better inhibitive effects on snake melon Botry- tis cinerea than original nano-Cu2O drug with the same mass concentration, and inhibitory effects are positively correlated with concentration. Correlation coefficients of the toxicity regression equation are 0.892 2 and 0.996 1, effective concentration EC50 of original nano-Cu2O drug and that of nano-Cu2O suspension are 3 948.9 and 167.9 mg/kg. Original nano-Cu2O drug has an inhibitive effect on snake melon Botrytis cinerea, but the inhibition of nano-Cu2O suspension is more obvious.
基金supported by the Public Projects of China State Oceanic Administration(200905021-4)the National High Technology Research and Development Program of China(863 Program,2006AA06Z362)the National Science & Technology Pillar Program(2006BAB03A12)~~