Search

Your search keyword '"Li, Fayong"' showing total 193 results
Start Over Author "Li, Fayong"
193 results on '"Li, Fayong"'

24. Preparation and characterization of green‐based anti‐ultraviolet and antidripping biodegradable film.

Author

Zhang, Lu, Li, Fayong, Xie, Dong, and Li, Yuan

Subjects
SCANNING electron microscopes, SOY proteins, CONTACT angle, AGRICULTURE, BIODEGRADABLE materials, THERMAL stability, BIODEGRADABLE plastics
Abstract

The biodegradable materials cannot meet the requirements as the agricultural film due to the poor UV resistance and antidripping performance. The work herein thus presented the development of the green‐based anti‐ultraviolet and antidripping multifunctional composite films using poly(butyleneadipate‐co‐terephthalate), microfibrillated cellulose (MFC), and soybean protein isolate (SPI) as the raw materials in the presence of other agents. The resulting composite films were systematically characterized using scanning electron microscope, thermogravimetry analysis (TG), UV, and rheometer measurements. The morphology changed obviously after introducing the MFC and SPI into the substrate film. In addition, the results indicated that the addition of MFC and SPI had a positive effect on the thermal stability and heat preservation of the film, respectively. The contact angle results indicated that SPI was an ideal antidripping agent and the MFC could be used as the release agent. The time of the first water drop of the film containing 2.5 g MFC and 2.0 g SPI was 6 min and 46 s, and the time of each 10 drops was less than 60 s, showing the advantages of using MFC as the release agent and SPI as the antidripping agent. The resulting multifunctional biodegradable films can be widely used in the agricultural and packaging fields. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

35. Enhancing the bifunctional oxygen reduction and evolution activity of CoNC by introducing a trace amount of Fe.

Author

Sun, Yongrong, Liu, Zhikai, Liu, Hailu, Li, Fayong, Li, Lingfeng, Du, Chunyu, Li, Jia, Xie, Dong, and Han, Guokang

Abstract

The potential application of zinc air batteries to tackle the energy shortage and environmental crisis has proposed new requirements of bifunctional catalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Utilizing the special spatial structure of zeolitic imidazolate framework-67 (ZIF-67) as an ideal research platform, the effect of a trace amount of Fe on the composition and structure of as-obtained Fe-CoNC catalysts was investigated. It was revealed that, due to the increased exposed pore structure and metal species located at the near surface, the active sites for the ORR/OER on Fe-CoNC are highly exposed, greatly boosting the activity to the reduction and evolution of oxygen in alkaline media. ZABs with Fe-CoNC have the highest maximum power density of 200 mW cm−2 when operated at current densities as high as 328 mA cm−2, better than not only Fe-free CoNC, but also precious metal-based references with the same catalyst loading. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

49. Biochar slows gross nitrification and gasses N emission via lower autotrophic nitrification in paddy soils

Author

Li Fayong, Jin Zhang, Cao Yucheng, Meiru Li, Xinqiang Liang, Guangming Tian, and Shuang He

Subjects
Chemistry, Stratigraphy, Amendment, Heterotroph, 04 agricultural and veterinary sciences, 010501 environmental sciences, 01 natural sciences, Manure, Environmental chemistry, Loam, Biochar, Soil water, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Nitrification, Autotroph, 0105 earth and related environmental sciences, Earth-Surface Processes
Abstract

Laboratory incubation experiments using 15N stable isotope labeling and acetylene suppression techniques were conducted to compare the autotrophic nitrification and heterotrophic nitrification rates with the addition of swine manure (SW) and swine-manure-derived biochar (SWB) in two paddy soils. SW and SWB were applied at four N-based amendment levels, namely control (0 mg N kg−1), low (1.1 mg N kg−1), medium (2.2 mg N kg−1), and high (4.4 mg N kg−1). Twenty-five milliliters of C2H2 gas were injected into each storage bottle to inhibit autotrophic nitrification in soil. At the end of the preincubation period, 160 mg kg−1 15N-glycine were added to each storage bottle to stimulate heterotrophic nitrification in soil. Results showed that SW increased the NH4+-N content by 3.5 to 17.5 mg kg−1 in both soils, while SWB decreased it by 0.1 to 4.7 mg kg−1 compared to control group, regardless of whether autotrophic nitrification was inhibited. Both SW and SWB enhanced NO3−-N accumulation in the two soils compared to control group when autotrophic nitrification was not inhibited; however, NO3−-N concentration in the soil with SWB was up to 24% lower than that with the same level of SW addition. NH3 volatilization rates were elevated at all the SW and SWB amendment levels, although only SW led to higher N2O emission rates. Compared with SW, high level of SWB significantly decreased N2O emissions by 78 to 84% in the loam and clay loam soils. The increase in NH3 volatilization, soil NO3−-N accumulation, and autotrophic nitrification rate were greater with SW than with SWB. Higher rates of soil heterotrophic nitrification were observed in SWB-amended soils than in SW-amended soils with a high (4.4 mg N kg−1) amendment level. Our results suggest that SWB is less likely to increase NO3−-N accumulation in soil and contributes more to the lower soil autotrophic nitrification rate compared with SW. Although SWB can promote heterotrophic nitrification, it generally inhibits the autotrophic nitrification process and slows the increment pace of the gross nitrification in paddy soils.

Published
2019

Catalog

Books, media, physical & digital resources
See catalog results