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345 results on '"Liao, Xuepin"'

9. Preparation and properties of microfiber-rare earth elements composites as X-ray protective materials

Author

YAN Linping, SHEN Yue, LI Hao, ZHUANG Junxin, ZHONG Rui, LIAO Xuepin, and SHI Bi

Subjects
microfiber (mf), x-ray, rare earth element, protective material, shielding efficiency, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

Microfiber (MF) has a similar structure to natural leather. Four rare earth (RE) elements, La, Ce, Gd, and Er, were loaded onto the surface of microfibers through plant tannins to prepare a wearable microfiber-based X-ray shielding material (RE-MF), and the X-ray shielding performance was tested. The analysis results of ultraviolet absorption spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FT-IR), photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) indicate that the rare earth elements can be uniformly loaded onto the surface of ultrafine fibers using plant tannins. The test results of X-ray shielding performance show that within the photon energy of 100 keV, the microfiber materials loaded with four rare earth elements have good X-ray shielding performance, and the shielding efficiency is increased with the increase of the loading amount of rare earth element and the thickness of microfiber. In the 20-80 keV energy range, the shielding efficiency of 2.6 mm Gd4-MF is up to 60% against X-rays, nearly equal to that of 0.25 mm lead plate but with non-toxicity, softness and wearability features. The test results of mechanical properties show that the microfiber-based X-ray protective material maintains the original good mechanical properties of microfibers, and is expected to be widely used in the field of X-ray protection.

Published
2023
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20. Effects of biochar produced from distiller grains on agronomic performances of sorghum (Sorghum bicolorL.) and greenhouse gas emissions from soil

Author

YANG, Hongjun, ZHANG, Suyi, HU, Jingyu, HUANG, Jianguo, AO, Zonghua, WANG, Xiaoqin, LI, Zhe, and LIAO, Xuepin

Abstract

Aromatic liquor breweries produce massive distiller grains containing a high percentage of rice husks that necessitate harmless treatment and resource utilization. These husk-rich distiller grains can be pyrolyzed in the Ni-based catalyst system at a relatively low temperature (480 °C) into combustible gas, which is used in liquor distillation, and biochar (BDG) with high mineral nutrients and good surface properties. A 3-year field experiment (2018–2020) was established to understand the effects of BDG on sorghum agronomic performances and greenhouse gas emissions from the soil. The results showed that BDG had higher mineral nutrient (N, P, K, and S) contents, larger cation exchange capacity, and better surface structure than those prepared using the traditional method at 400 and 600 °C. Compared with sole chemical fertilizer (CF), the combination of CF and BDG (CF+BDG) increased sorghum nutrient (N, P, and K) uptake, yield, fertilizer use efficiency, and economic benefit. Cumulative CO2emission from the soil changed little between with and without BDG, indicating the microbial stability of BDG. The effective adsorption of NH3or NH4+by BDG upon N application may reduce N loss through NH3and N2O emissions and increase the efficiency of fertilizer N use. Cumulative CH4emission ranged from 32.45 to 44.86 g ha-1, which could be overlooked as a greenhouse gas in the sorghum field. Moreover, CF+BDG significantly decreased NH3and N2O emissions for the production of each unit of sorghum grains and the CO2emission from the land for the production of a certain amount of sorghum grains. Therefore, CF+BDG exhibited better agronomic and environmental performances in sorghum cultivation.

Published
2024
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46. Hierarchical collagen fibers complexed with tannic acid and Fe3+ as a heterogeneous catalyst for enhancing sulfate radical-based advanced oxidation process.

Author

Wang, Rui, Yu, Ruiquan, Wang, Junchao, Xiang, Jun, Chen, Chaojian, Liu, Gongyan, and Liao, Xuepin

Subjects
TANNINS, HETEROGENEOUS catalysts, COLLAGEN, POLLUTANTS, SULFATES, SEWAGE, INDUSTRIAL wastes
Abstract

Efficient sulfate radical-based advanced oxidation processes (SR-AOPs) are important for treating organic contaminants of industrial wastewater. To achieve this goal, tannic acid (TA)–modified skin collagen fibers (CFs) were prepared for the enhanced immobilization of Fe3+ based on multiple complexation interactions, resulting in a heterogeneous catalyst with more catalytic sites (defined as TA-Fe-CFs) for activating peroxymonosulfate (PMS). During the removal of an organic dye (rhodamine B, RhB) from water, the hierarchical TA-Fe-CFs exhibited excellent adsorption capacity at the early stage before the introduction of PMS, which can be ascribed to the π-π interaction between TA and aromatic RhB. Such improved mass transfer of target contaminants into the catalytic support was proved to be beneficial for improving the utilization efficiency of sulfate radicals in subsequent SR-AOPs. After introducing PMS, the reductive TA moieties of the heterogeneous catalyst were able to accelerate the redox cycle of Fe3+/Fe2+ in Fenton reactions, facilitating the activation of PMS to generate sulfate radicals for the degradation of organic RhB. [ABSTRACT FROM AUTHOR]

Published
2022
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