JOURNAL OF MOLECULAR LIQUIDS
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2016
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IF 2.74
Yunhong Yi,Junliang Lv,Yi Liu,Gongqing Wu
In this study, the removal of Cr(VI) from aqueous solutions by modified Litchi peel (MLP) has been investigated. Fourier-transform infrared spectrophotometer (FTIR) and scanning electron microscopic analysis (SEM) were used to characterize the biosorbents. The main results are as follow: 1) the optimal pH condition and optimum dosage for the adsorption of Cr(VI) were found to be 1–4 and 8.0 g L − 1 , respectively; 2) the adsorption process on Cr(VI) increased rapidly in 80 min and almost reached adsorption equilibrium in 100 min; 3) the adsorption of Cr(VI) increased with the increase of temperature. Furthermore, the Langmuir and Freudlich models were used to study the equilibrium process. It was found that the Langmuir model provided better correlation for the adsorption of Cr(VI) on MLP and Litchi peel (LP). The maximum adsorption at equilibrium for MLP is 9.55 mg g − 1 at 303 K, while for LP it is only 7.05 mg g − 1 at 303 K. Different kinetic models were used to analyze the kinetics of the adsorption. The pseudo-second-order model could better reflect the MLP adsorption kinetic process of Cr(VI). The thermodynamic parameters showed that the biosorption was endothermic, and there was an energy barrier for the adsorption of Cr(VI) on MLP. The present study demonstrated that MLP is an effective adsorbent for removing Cr(VI) from aqueous solutions.
研究领域:
环境科学
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生物学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Ming-Jun Tan,Ying Li,Si-Qi Zhao,Fu-Hao Yue,Die-Jia Cai,Jin-Tao Wu,Xin-An Zeng,Jian Li,Zhong Han
The effects of pulsed electric field combined with ultrasound (PEF-US) on the recovery of polyphenols from litchi peels were investigated. In addition, the optimal purification parameters for polyphenol extracts and their biological activities were also explored in this study. Single-factor and orthogonal experiments were used to optimize the extraction conditions of polyphenols. After optimization, the total phenol content (TPC) of the sample extracted by PEF-US was 2.30 times higher than that of the sample extracted by traditional hot-water extraction. The mechanism of PEF-US enhancing polyphenol recovery was also revealed by morphological analysis of the powder surface. LX-7 was the best resin by comparing the purification effect of nine macroporous resins. The optimum conditions for purification of litchi peel polyphenols by LX-7 resin were also optimized through adsorption and desorption experiments. UHPLC-MS and HPLC results revealed that gentisic acid , catechin , procyanidin A2 and procyanidin B1 are four main substances in purified samples. The results of bioactivity experiments showed that the purified polyphenol samples had strong antioxidant and antibacterial activity . Overall, PEF-US is an efficient method for recovering polyphenols from litchi peels. Our study also provides a strategy for the comprehensive utilization of fruit processing waste.
研究领域:
食品科学
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植物化学
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生物技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2025
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IF 2.5
Wang Yuanyuan,Dong Xingshen,Xia Yingjing,Song Hua,Liu Shetian
Because of its abundant availability and potential for carbon conversion, litchi peel has been selected as a biomass carbon precursor. By utilizing a NaCl/ZnCl 2 mixed salt as an activating agent, a series of hierarchical litchi peel porous carbon materials (designated as NZ-LPPC- x - y , where x denotes the mixed salt-to-LP mass ratio, and y signifies the activation temperature) were successfully synthesized. Among them, NZ-LPPC-3-700 exhibited the largest specific surface area (1712.37 m 2 g −1 ) and pore volume (0.94 cm 3 g −1 ). Electrochemical testing revealed that NZ-LPPC-3-700 demonstrated favorable capacitive performance in 6 M KOH electrolyte, achieving high specific capacitance of 254.5 F g −1 at 1 A g −1 , while maintaining a capacitance retention rate close to 78.30% at 20 A g −1 . In a two-electrode system, the NZ-LPPC-3-700//NZ-LPPC-3-700 exhibited low equivalent series resistance and charge transfer resistance, along with energy density of 8.25 Wh kg −1 . Furthermore, it demonstrated remarkable cycling stability, retaining 96.6% of its initial capacitance after 20,000 consecutive charge–discharge cycles 10 A g −1 . Graphical
研究领域:
材料科学
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能源存储
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生物质转化
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产品关联
DOI
高影响因子
Materials Today Communications
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2025
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IF 4.5
Xingshen Dong,Yingjing Xia,Yuanyuan Wang,Lina Bi,Shetian Liu
Addressing the dual challenges of biomass waste disposal and energy material development, this study proposes an innovative pathway to convert litchi peel biomass waste into high-performance carbon materials doped with heteroatoms (N, O), aiming to enhance the electrochemical performance of supercapacitors. Using litchi peel as the carbon source, dicyandiamide as the nitrogen dopant, and a mixture of NaCl/ZnCl 2 as the activator, a series of NLPPC- y ( y signifies the mass ratio of the mixed salt to LPC) materials were successfully synthesized. Among them, NLPPC-2 exhibited the optimal electrochemical performance, characterized by a high specific capacitance of 346.4 F·g −1 , good rate capability, and long-term cyclic stability. Compared to undoped carbon materials (254.5 F·g −1 ), the heteroatom doping significantly improved the capacitive performance of the material, with NLPPC-2 demonstrating an increased capacitance of 91.9 F·g −1 (36.1 %). This study not only provides a novel method for the preparation of heteroatom-doped carbon materials but also lays a solid foundation for the development of high-performance supercapacitors, showcasing broad application prospects.
研究领域:
材料科学
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能源技术
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环境科学
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2020
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IF 4.469
Zitian Liu,Meijun Du,Huiping Liu,Kai Zhang,Xiangxin Xu,Kai Liu,Jianqiu Tu,Qingrun Liu
Nano-titanium dioxide (nano-TiO 2 ) and litchi peel extract (LPE) were added to chitosan (CS) matrix to develop a novel active packaging film and watercored apple coating. The addition of nano-TiO 2 and/or LPE enhanced mechanical strength, water vapor barrier properties, and thermal stability of CS-based films. The total phenolic content and antioxidant capacity of the films were enhanced by LPE incorporation. Viscosity and wettability of the coating solutions and their impact on the storage quality of watercored Fuji apples at 0 ± 1℃ for 180 d were investigated. Coating treatment significantly inhibited respiration rate, weight loss, and softening. Polyphenol oxidase activity, electrolyte leakage and malondialdehyde accumulation were inhibited by coating treatment. A CS + TiO 2 +LPE coating was the most effective treatment for maintaining cold storage quality of watercored apples. This combination presents promising applications as an active food packaging film and fruit preservation coating.
研究领域:
食品科学
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材料科学
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农业工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）