Nano Energy
·
2020
·
IF 16.602
Xianquan Zhang,Lintao Yang,Ben Dang,Jiabo Tao,Shujun Li,Shuangliang Zhao,Wei Li,Jian Li,Zhijun Chen,Shouxin Liu
Wood-based solar steam generation devices (W-SSGDs) have enormous potential to produce pure water by distillation since they are sustainable, easily prepared and green. However, most W-SSGDs described so far have low solar-to-thermal efficiency (<1.5 kg m −2 h −1 ) under 1 standard sun irradiation. Inspired by nature, we have now engineered a W-SSGD with improved solar steam generation efficiency by using p -toluenesulfonic acid ( p -TsOH)-assisted hydrothermal treatment . After treatment, the wood lumens became more hydrophilic and were reduced in diameter from 40-60 μm to 10–20 μm. These rationally introduced changes lowered the enthalpy of vaporization of water and greatly enhanced the capacity of the wood for transportation of water. The as-prepared W-SSGD had an evaporation rate of 2.2 kg m −2 h −1 and an efficiency of 87%, which, to the best of our knowledge, are the highest reported values for a W-SSGD.
研究领域:
材料科学
·
能源工程
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DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Shaohua Fang,Qiuli Xia,Lin Zhang,Peng Zhan,Yan Qing,Zhiping Wu,Hui Wang,Lishu Shao,Na Liu,Jiaying He,Jin Liu
Biomass is the ideal substitute for petrochemical resources because of its renewable and abundant sources. p-Toluenesulfonic acid (p-TsOH) can effectively separate lignin from biomass under mild conditions, so it is highly expected in biomass fractionation to improve the utilization efficiency. In this study, we investigated the effect of p-TsOH differentiated fractionation of poplar sawdust, eucalyptus sawdust, and rice straw below 100 °C. According to the experimental results, upon pretreatment by p-TsOH of the three kinds of raw biomass, most of the lignin and hemicellulose of poplar sawdust and eucalyptus sawdust were removed, whereas the cellulose was retained, but most of the hemicellulose and cellulose of rice straw were kept, whereas the lignin was removed at similar conditions. The structures and compositions of pretreatment residues, lignin, and hemicellulose extracted from raw biomass were characterized by XRD, FTIR, HSQC-NMR, XPS, and SEM. The differentiated fractionation mechanism of biomass was analyzed. A better recognition and understanding of the factors affecting biomatrix opening and fractionation will allow for the identification of new pretreatment strategies that improve biomass utilization and permit the rational enzymatic hydrolysis of cellulose.
研究领域:
生物化学
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可再生能源
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产品关联
DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2024
·Vol. 26
·期 5
·2783-2792
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IF 9.3
Jiayi Zheng,Liheng Chen,Zhichang Huang,Xueqing Qiu
Extraction of native-like lignin from lignocellulose is crucial for maximizing the value of all three major components of biomass. In this study, molecular dynamics was employed to reveal the essence of lignin condensation during the pretreatment of biomass with a promising acidic hydrotropic solution (AHS) at the molecular level. Diols were discovered to effectively suppress the excessive acidity of p-toluenesulfonic acid (pTsOH) in AHS while maintaining its solubilizing effect below a minimal hydrotropic concentration (MHC). The experimental results confirmed that the combined use of 1,4-butanediol and pTsOH can extract native-like lignin under mild conditions. The retention of lignin's β-O-4 linkages can exceed 90%, and the lignin extraction rate was over 80%. The obtained lignin can enhance the efficacy of chemical sunscreens, doubling the sun protection factor (SPF). Simultaneously, the residual cellulose was readily hydrolyzed into glucose by cellulase. This strategy demonstrates excellent adaptability to various biomass sources, including herbaceous species, hardwoods, and highly recalcitrant softwoods. The work lays the theoretical foundation for the precise control of biomass component separation using AHS, contributing to the development of mild and efficient component separation technologies in the future.
研究领域:
生物化学
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可再生资源工程
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DOI
高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 4
·2273-2287
·
IF 6.123
Liu Yifan,Chen Beiqiu,Lv Yuancai,Ye Xiaoxia,Lin Chunxiang,Liu Minghua
Residual lignin affects the physical and chemical performance of lignin-containing cellulose nanofibers (LCNFs). In this work, LCNFs were prepared from sugarcane bagasse powder (SBP) through p -toluenesulfonic acid ( p -TsOH) hydrolysis and the subsequent homogenization treatment. By adjusting the concentration of p -TsOH and hydrolysis temperature, LCNFs with lignin content of 4.69–17.53% were obtained, and the effects of lignin content on the chemical structure, crystallinity, size, hydrophobicity and thermal stability of LCNFs were systematically studied. With the increase of lignin content, the diameters and average water contact angles of LCNFs were increased (from 169.65 to 781.56 nm and 39.74–86.16°, respectively), while the crystallinities were decreased. The thermal stabilities of LCNFs were decided both by lignin content and the crystallinity. The by-product lignin nanoparticles (LNPs) with an average diameter of 50–500 nm were generated with LCNFs, further improving the resource utilization value of SBP. This study provides theoretical and experimental basis for the subsequent processing of films with different hydrophobic properties and materials with higher mechanical properties and thermal stability. Graphical abstract
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 6
·1-10
·
IF 20.1
Zou Tao,Zhang Dongqiao,Shen Kuangyu,Huang Zhenduo,Xu Tao,Peng Xiaohong,Zhang He,Du Yanliang,Sun Luyi
Recently, many efforts have been devoted to studying early-stage fire-warning materials (EFWMs). Among those, thermoelectric effect-based EFWM (TE-EFWMs) are particularly attractive because they are self-powered and intrinsically sensitive to temperature. However, none of the reported fire-warning response times of TE-EFWMs can reach 1.0 s. Herein, flame-retardant composite cotton fabrics with speedy and repeatable fire warning function (denoted as CF-TE-FR) were constructed by in-situ polymerized polypyrrole (PPy) doped with P-toluenesulfonic acid (PTSA) and a flame retardant composite layer composed of sodium montmorillonite (MMT) and ammonium polyphosphate (APP). The fire warning performance of CF-TE-FR was effectively enhanced through PTSA doping, and the fire warning response time was shortened with an increasing concentration of PTSA. The fire warning indicator could be triggered as fast as 0.8 s when the molar ratio of PTSA to pyrrole monomer reached 1:3. Meanwhile, all the CF-TE-FR samples could release the fire-warning signals repeatedly. This work proposes a facile approach to the fabrication and application of organic thermoelectric polymer-based materials with ultrafast fire-warning response, repeatable fire-warning capability, and excellent flame retardancy. Graphical abstract Flame-retardant cotton fabrics based on the thermoelectric effect of polypyrrole demonstrate speedy and repeatable fire warning function.
研究领域:
材料科学
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纺织工程
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消防安全
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2022
·
IF 6.911
Yiyi Liu,Fangling Wu,Jiabin Wang,Ling Pu,Chuan-Fan Ding
The separation of chiral amino acids (AAs) and their derivatives has always been a research difficulty in the field of biochemistry due to the high similarity of enantiomeric structures. In this work, a simple and quick method using natamycin (Nat) as chiral selector has been developed to simultaneously separate chiral AAs and their derivatives of carbobenzoxy/benzyl-AAs (Cbz/Bzl-AAs) by trapped ion mobility spectrometry-mass spectrometry (TIMS-MS). Specifically, 12 groups of the Cbz-AAs and Bzl-AAs can get baseline mobility separation by simple mixing with Nat to form binary diastereomeric complex ions [Nat+(Cbz-D/L-AA)+H] + and [Nat+(Bzl-D/L-AA)+H] + . While for the remained 5 groups of Bzl-D/L-AAs and 16 groups of D/L-AAs with unsatisfying separation, by further adding P-toluenesulfonic acid (PTS), the formed ternary complexes can allow their baseline chiral separation . Specifically, Bzl-D-AAs and Bzl-L-AAs get much improved separation effect by the formed diastereomeric complexes of [Nat+(Bzl-AA) 2 +PTS 2 +H] + , which the R p-p was improved from 0 to 2.40; while the D/L-AAs can get baseline separation by the formed diastereomeric complexes of [Nat + AA + PTS + H] + , [Nat + AA+(PTS) 2 +H] + , and [Nat+(AA) 2 +(PTS) 2 +H] + , with the R p-p ranged from 0.44 to 3.53. Definitely, PTS is the first time reported as the ligand to improve the separation effect for the enantiomers, and with the higher assembly of chiral analyte, Nat, and PTS might enable better chiral separation for the chiral amino acid and their derivatives. Moreover, method validation of relative quantification and accuracy for the D/L-AA and their derivatives were measured in a mixture, yielding R 2 greater than 0.99 and RSD% ≤ 2.68%. Overall, Nat and PTS as chiral selector and ligand can be widely used for chiral AAs and their derivatives mobility separation, and potentially for the separation of other AA-related chiral molecules.
研究领域:
生物化学
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分析化学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Kun Wang,Xinge Liu,Shumin Yang,Jianfeng Ma,Genlin Tian,Lili Shang,Zehui Jiang,Qianli Ma
Bamboo, as an important biomass raw material, has a very favorable prospect for Nature-based Solution. Here we provide a method to prepare bamboo-based lignocellulosic nanofibrils (LCNFs) and films with excellent impedance performances by p -toluenesulfonic acid ( p -TsOH) under mild condition. The combined delignification factor (CDF) and combined hydrolysis factor (CHF) were introduced to regulate the hydrolysis severity. The resultant LCNFs with uniform diameter retained a plentiful reactivity without surface functional group changing. The ascendant thermal stability ( T max > 360 °C) of the LCNFs were also obtained. The films made by the LCNFs can block about 99 % UV light with transparency greater than 50 % which exhibited remarkable UV resistance in both UVA and UVB regions. Furthermore, the films presented excellent hydrophobic stability which showed large contact angles (water, 89–99°) and maintained at 64° after 300 s. These properties make bamboo-based materials substitute bamboo for plastics and can be used in aviation, construction, automotive industry, packaging and many other fields, conforming to international initiatives.
研究领域:
材料科学
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生物质资源利用
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Yifei Jiang,Xiaodan Qiu,Xuejia Zhao,Yao Fu,Wenling Su,Yiran Li,Zhiling Zhu,Limin Zuo,Xiaofang Lian,Huiyi Liu,Qingying Jia,Jing Yao,Guangzhi Shan
Sulfonate esters, one class of genotoxic impurities (GTIs), have gained significant attention in recent years due to their potential to cause genetic mutations and cancer. In the current study, we employed the dummy template molecular imprinting technology with a dummy template molecule replacing the target molecule to establish a pretreatment method for samples containing p-toluene sulfonate esters . Through computer simulation and ultraviolet–visible spectroscopy analysis, the optimal functional monomer acrylamide and polymerization solvent chloroform were selected. Subsequently, a dummy template molecularly imprinted polymer (DMIP) was prepared by the precipitation polymerization method, and the polymer was characterized in morphology, particle size, and composition. The results of the adsorption and enrichment study demonstrated that the DMIP has high adsorption capability (Q = 7.88 mg/g) and favorable imprinting effects (IF = 1.37); Further, it could simultaneously adsorb three p-toluene sulfonate esters. The optimal adsorption conditions were obtained by conditional optimization of solid-phase extraction (SPE). A pH 7 solution was selected as the loading condition, the methanol/1 % phosphoric acid solution (20:80, v/v) was selected as the washing solution, and acetonitrile containing 10 % acetic acid in 6 mL was selected as the elution solvent. Finally, we determined methyl p-toluene sulfonate alkyl esters, ethyl p-toluene sulfonate alkyl esters, and isopropyl p-toluene sulfonate alkyl esters in tosufloxacin toluene sulfonate and capecitabine at the 10 ppm level (relative to 1 mg/mL active pharmaceutical ingredient (API) samples) by using DMIP-based SPE coupled with HPLC. This approach facilitated the selective enrichment of p-toluene sulfonate esters GTIs from complex API samples.
研究领域:
分析化学
·
药物分析
·
环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 1
·46904
·
IF 1.901
Saad Ahmed,Yangben Cai,Muhammad Ali,Santosh Khanal,Shiai Xu
In this study, we incorporated commercially available p -toluene sulfonic acid coated boehmite nanofillers (commercially known as OS 1 ) into the chitosan (CS) matrix to fabricate CS–OS 1 nanocomposite membranes with a high proton conductivity for fuel-cell applications. These nanocomposite membranes were characterized by Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction analysis, scanning electron microscopy, and thermogravimetric analysis. Their mechanical properties, water uptake, ion-exchange capacity, and proton conductivity were also determined. The results show that the incorporation of OS 1 to CS chains can inhibit the mobility of CS chains and, hence, enhance the thermal stability and mechanical properties of CS–OS 1 nanocomposite membranes. The composite membrane with 5 wt % OS 1 showed a proton conductivity of 0.032 S/cm; this was almost equal to that of commercially available Nafion 117. We concluded that CS–OS 1 nanocomposite membranes have potential for fuel-cell applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 46904.
研究领域:
材料科学
·
能源工程
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DOI
高影响因子
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