MOLECULES
·
2024
·Vol. 29
·期 22
·5266
·
IF 4.2
Jun Zhou,Pin Lv,Binsheng He,Jingjing Wu,Gao Wang,Hongzhi Ma,Yueyao Wang,Guiyun Chen
Suitable fermentation substrates and fermentation modes can effectively improve the fermentation ethanol yield. In this study, we optimised the hydrothermal pretreatment conditions by orthogonal optimisation using waste tissue paper as substrate. These conditions consisted of 50 min duration in a high-pressure reactor with pure water as solvent at a temperature of 160 °C. The biomass to water ratio was maintained at a constant level. The cellulose content of the pretreated TP was 81.19 ± 4.06%, which was an increase of 21.59% compared to the blank control. The 72 h reducing sugar yield of pretreated TP was 0.61 g sugar/g paper, which was 38.64% higher than that of untreated TP. Subsequently, the pretreated TP was fermented under optimal conditions. The mixed group of Saccharomyces cerevisiae andCandida shehatae(SC) showed a distributed saccharification fermentation pattern, with an ethanol yield of 28.11 g/L in 72 h. On the other hand, the single Saccharomyces cerevisiae (S) exhibited a homobloc saccharification fermentation pattern, with an ethanol yield of 35.15 g/L in 72 h.
研究领域:
生物工程
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发酵技术
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产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 7
·1333
·
IF 4.967
Jiatian Zhu,Yuqi Bao,Luxiong Lv,Fanyan Zeng,Dasong Du,Chen Liang,Jiayan Ge,Shuangfei Wang,Shuangquan Yao
The preparation of bio-oil through biomass pyrolysis is promoted by different demineralization processes to remove alkali and alkaline earth metal elements (AAEMs). In this study, the hydrothermal pretreatment demineralization was optimized by the response surface method. The pretreatment temperature, time and pH were the response elements, and the total dissolution rates of potassium, calcium and magnesium were the response values. The interactions of response factors for AAEMs removal were analyzed. The interaction between temperature and time was significant. The optimal AAEMs removal process was obtained with a reaction temperature of 172.98 °C, time of 59.77 min, and pH of 3.01. The optimal dissolution rate of AAEMs was 47.59%. The thermal stability of eucalyptus with and without pretreatment was analyzed by TGA. The hydrothermal pretreatment samples exhibit higher thermostability. The composition and distribution of pyrolysis products of different samples were analyzed by Py-GC/MS. The results showed that the content of sugars and high-quality bio-oil (C6, C7, C8 and C9) were 60.74% and 80.99%, respectively, by hydrothermal pretreatment. These results show that the removal of AAEMs through hydrothermal pretreatment not only improves the yield of bio-oil, but also improves the quality of bio-oil and promotes an upgrade in the quality of bio-oil.Keywords:eucalyptus;demineralization;hydrothermal pretreatment;thermostability;pyrolysis products
研究领域:
能源植物学
·
生物质能工程
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DOI
PubMed
高影响因子
WATER RESEARCH
·
2022
·
IF 13.4
Chao Jiang,Bing-Jie Ni,Xiaowei Zheng,Bei Lu,Zheng Chen,Yang Gao,Yalei Zhang,Shicheng Zhang,Gang Luo
Waste activated sludge (WAS) contains high concentrations of microplastics (MPs), which could serve as vectors of various organic pollutants and heavy metals, causing synergistic transportation and pollution. The application of combined hydrothermal pretreatment (HTP) and anaerobic digestion (AD) has raised growing concerns since the low-temperature hydrothermal treatment could enhance the biogas production of WAS. However, the changes in physicochemical properties, adsorption performances, and effects on AD of MPs by HTP have not been studied. The study used three typical MPs in WAS, and it was found that the HTP (170°C & 30min) increased MPs’ specific surface area and carbonyl index (CI) while decreasing the relative crystallinity. The adsorption capacity to Cd increased through the carbonylation for polyethylene microplastic (PE-MP) and polystyrene microplastic (PS-MP) while decreasing by the dechlorination for polyvinyl chloride microplastic (PVC-MP). Meanwhile, increased hydrophilicity reduced the adsorption capacities of all three typical MPs for ofloxacin. The above results indicated that the HTP could be worth blocking the adsorption of polar MPs for polar pollutants. For the pristine MPs, only PVC-MP at the highest concentration (0.5 g kg −1 VS) significantly ( p < 0.05) reduced methane production by 16.2 ± 3.3% of WAS without the HTP. However, the HTP resulted in significant ( p < 0.05) inhibition of methane production of WAS at high concentrations of PE-MP and PVC-MP (e.g., 0.1 and 0.5 g kg −1 VS), which was due to the acceleration of the released toxic plastic additives (dibutyl phthalate, dimethyl phthalate, and bisphenol-A). Microbial analysis showed the abundances of vital anaerobes, such as acid-producing bacteria ( Acetoanerrobium and Mesotoga ), proteolytic bacteria ( Proteiniborus ), and methanogens ( Methanosaeta ) clearly decreased with the PE-MP and PVC-MP after the HTP, which might result in the decreased methane production. The study provided deep-insight of MPs’ behaviors during the combined HTP-AD process.
研究领域:
环境科学
·
微生物学
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DOI
PubMed
高影响因子
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
·
2024
·
IF 1.7
Fen Yin,Tianyu Jiang,Xingyu Lu,Wenxuan Bie,Xiaojuan Wang,Xiaojun Ma,Dongna Li
In this work, a facile and environmentally friendly strategy was proposed for the production of reducing sugars from enzymatic hydrolysis of rubber wood by surfactant-assisted hydrothermal pretreatment. Compared with hydrothermal pretreatment, the addition of surfactants (Tween 40) significantly increased the reducing sugars concentration, the highest reducing sugars concentration was up to 22.47 g/L. After surfactant-assisted pretreatment, the crystallinity index of rubber wood hydrolysis residues increased and then decreased with the addition amount of Tween 40. The surfactant-assisted pretreated rubber wood featured high cellulose and hemicellulose conversion rates of 95.1% and 95.4% respectively, which was 122.2% and 41.1% higher than the hydrothermally pretreated rubber wood. It was also found that surfactant-assisted hydrothermal pretreatment had the same improvement effect on increasing the sugar production of other lignocellulose. The results showed that surfactant-assisted hydrothermal pretreatment is a promising and universal method for developing biomass-based products.
研究领域:
生物化学
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可再生能源
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生物质工程
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 74
·60264-60272
·
IF 3.84
Aojie Deng,Junli Ren,Huiling Li,Feng Peng,Runcang Sun
Corncob with a high content of pentose-rich hemicelluloses shows great potential for furfural production. In this paper, an environmentally-friendly two-step process for furfural production was developed by the hydrothermal pretreatment of corncob and the heterogeneous catalysis of the hydrolysate using a solid acid catalyst. The hydrothermal pretreatment was applied to release hemicelluloses from the cell wall of the corncob, which were hydrolyzed into monosaccharide and oligosaccharide under the investigated conditions (160–190 °C, 0–60 min). Subsequently, heterogeneous catalysis of the hydrolysate obtained from the hydrothermal pretreatment was performed using SO42−/SiO2–Al2O3/La3+ as a solid acid catalyst at 150 °C for 2.5 h. The maximum yield of furfural achieved was up to 21% under the investigated experimental conditions from the catalysis of hydrolysates obtained at 190 °C for 60 min in the hydrothermal process. Moreover, there was no obvious change in the catalytic activity of SO42−/SiO2–Al2O3/La3+ after four runs, and only a decline of 5.28% yield of furfural was observed. This two-step process is an environmentally-friendly process for furfural production from pentose-rich biomass and serves as an effective approach for recovering the solid catalyst from the reaction medium.
研究领域:
生物化学
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可再生能源
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环境科学
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Xiaoxia Ren,Shou-Dong Xu,Shibin Liu,Liang Chen,Ding Zhang,Li Qiu
Biomass wastes or biomass derived hard carbon materials with the advantages of green, as well as economic and high reversible capacity have became the promising anode materials for sodium ion batteries (SIBs). Despite this, the poor rate capability hinders their further development. Here, we synthesized lath-shaped hard carbon materials derived from peanut shells by a two-step approach, namely a hydrothermal pretreatment for different treatment time first, and then a carbonized process at 800 °C. Morphology and structural characterizations (SEM, XRD and Raman) prove the hydrothermal pretreatment has a great influence on morphology transformation, the layer spacing, as well as the defect concentration which can enhance the adsorption sites of Na + and shorten the transport route of sodium ions . The PSDHCs-4 (hydrothermal treatment for 4 h) electrode can deliver the highest reversible capacity of 256 ± 5 mAh g −1 , and show the best capacity retention of 97 ± 2% at the current rate of 0.1 C after 100 cycles. More importantly, PSDHCs-4 electrode shows the excellent rate performances with a reversible capacity of 261, 244, 206, 163, 125, and 100 mAh g −1 at the current rates of 0.1, 0.2, 0.5, 1.0, 2.0 and 5.0 C, respectively. These remarkable electrochemical properties indicate that PSDHCs-4 material should be a promising anode material for SIBs.
研究领域:
材料科学
·
电化学
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能源存储
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纳米材料
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可持续能源
·
碳材料
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DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2023
·Vol. 98
·期 8
·1964-1974
·
IF 3.4
Peng Guan,Hang Yin,Peigeng Han,Jianyong Liu,Songqiu Yang
BACKGROUND C 3 N 4 nanosheets with a layered structure have attracted significant interest in the field of photocatalysis. However, direct preparation of these nanosheets remains a significant challenge. RESULTS In this study, highly active C 3 N 4 nanosheets were fabricated via the direct thermal polymerization of melamine supramolecular aggregates obtained using hydrochloric-acid-induced hydrothermal pretreatment. Various methods were adopted to characterize the photocatalytic materials obtained and density functional theory calculations were performed to understand the highly efficient nature of C 3 N 4 . The structures and photochemistry of the photocatalytic materials depend on the hydrochloric-acid-induced hydrothermal pretreatment method. It was found that C 3 N 4 -180-H nanosheets have numerous (C) 2 N–H that are conducive to photogenerated electron–hole separation. In addition, the C 3 N 4 -180-H nanosheets have a large surface area and a short charge-carrier diffusion distance. Furthermore, the C 3 N 4 -180-H nanosheets exhibited a longer excitation-state charge-carrier lifetime than bulk C 3 N 4 . The as-prepared C 3 N 4 -180-H nanosheets with unique structural advantages showed superior photocatalytic H 2 evolution performance (413 μmol h −1 g −1 ) compared to that of bulk C 3 N 4 (90.5 μmol h −1 g −1 ). CONCLUSION This study offers a feasible and simple method for synthesizing C 3 N 4 nanosheets and developing an excellent 2D photocatalyst for superior solar-to-H 2 production. © 2023 Society of Chemical Industry (SCI).
研究领域:
材料科学
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化学工程
·
能源科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yuwan Sheng,Deli Zhang,Xiaoning Duan,Lu Di,Fang Wang,Lihong Wang,Weiming Yi
The selection and design of biomass-derived carbon precursors played a pivotal role in determining the physicochemical properties and catalytic performance of the catalysts. This study investigated the effect of hydrothermal pretreatment on magnetic carbon-based solid acid catalysts (MCSAs) derived from corn stover, focusing on the structural characteristics, catalytic performance, and recyclability. Torrefaction pretreatment and untreated samples were also investigated for comparison. Hydrothermal pretreatment resulted in catalysts with relatively larger pore diameters (2.86–3.11 nm) and higher pore volumes (0.18–0.19 cm 3 /g), as well as elevated -SO 3 H group concentrations (0.68–0.82 mmol/g). After the sixth cycle, the cellulose conversion of HC-210 remained 76.25 %, which maintained 90.23 % of the initial catalytic activity. The findings suggest that hydrothermal pretreatment significantly enhances the catalytic activity and recyclability of MCSAs.
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DOI
PubMed
高影响因子
Synthetic and Systems Biotechnology
·
2025
·
IF 4.4
Dandan Feng,Tianshu Zhang,Guan Zhou,Yanli Cao,Quan Luo,Huifang Xu,Xuefeng Lu
2′-Deoxy-2′-fluoroadenosine (2′-F-dA) is a nucleoside analogue used as a key building block for oligonucleotide drugs. It can be biosynthesized from a low-cost 2′-deoxy-2′-fluorouridine via one-pot transglycosylation catalyzed by a thymidine phosphorylase (TP) and a purine nucleoside phosphorylase (PNP). However, reliance on purified enzymes and low space-time yields present challenges for industrial application of the process. Here, we develop a whole-cell-based biocatalytic system employing TP and PNP from Escherichia coli , which demonstrates high catalytic efficiency and operational simplicity in scaled-up reaction. In particular, a thermal pretreatment of TP- and PNP-expressing whole cells, determined as 50 °C for 3 h, effectively suppressed endogenous deamination side reaction while enhancing 2′-F-dA yield. Subsequent optimization of enzyme and substrate loadings and their relative ratios achieved an unprecedented space-time yield of 1.22 g/L/h with 88.1 g/L product titer in a 500 mL scaled-up reaction, manifesting a highest total conversion of 68.2 %. An integrated purification process yielded gram-scale solid powder of 2′-F-dA with 98.0 % chemical purity and 85.0 % recovery. This novel whole-cell biocatalytic process demonstrates significant industrial potential for the production of 2′-F-dA.
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Shijin Zhou,Wenhao Zhang,Ding Liu,Xuan Yi,Wenjia Han,Xia Li,Xingxiang Ji,Guangfan Meng,Xiaobao Li,Jiayi Chang,Jiaxin Xiong
Biomass-derived hard carbon has emerged as an anode material for sodium-ion batteries due to its cost-effectiveness and sustainability, but faces challenges in commercialization due to low sodium storage capacity and heterogeneity of precursors. This work presents a one-step acidothermal pretreatment strategy that rationally engineers walnut shell precursors through selective component modulation—effectively removing hemicellulose while reducing amorphous cellulose and acid-soluble lignin. The optimized precursor (RW-2) achieves balanced cellulose (48.9 %) and acid-insoluble lignin (49.6 %) composition with hierarchical porosity, enabling the synthesis of architecturally superior hard carbon (HC-2). The derived hard carbon (HC-2) integrates expanded interlayer spacing, hierarchical porosity, and defect-rich interfaces, synergistically enhancing sodium storage via intercalation-adsorption hybrid mechanisms. Electrochemically, HC-2 achieves a high reversible capacity (356 mAh/g at 20 mA/g), exceptional rate capability (280 mAh/g at 1000 mA/g) and sustained cyclability (79.3 % retention over 600 cycles at 1000 mA/g). By correlating precursor composition evolution with carbon microstructure, this work establishes a universal biomass engineering paradigm that decouples precursor heterogeneity from performance limitations while elucidating defect-mediated storage dynamics. The strategy provides a scalable pathway toward sustainable, high-performance sodium-ion battery anodes, bridging agricultural waste valorization with advanced energy storage technologies.
研究领域:
材料科学
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储能技术
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电化学
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纳米技术
·
可持续化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wenze Zhang,Zhuoxia Shen,Chaoran Li,Yumeng Yang,Tiange Zhang,Bo-Yang Yu,Xianchuang Zheng,Jiangwei Tian
Hepatic ischemia reperfusion injury (HIRI) following transplantation or resection can lead to irreversible liver dysfunction and even failure, yet current therapeutic interventions are limited. Herein, we introduce a “defend–attack and capture flag” nanotheranostic strategy for the cascade management of HIRI. Firstly, the NIR-II photothermal pretreatment with the developed nanosystem provides preprotection for the liver, acting as “defend”. Subsequently, the pharmacotherapy furnishes direct cure for HIRI via the delivery and controlled release of wedelolactone from the nanosystem, serving as “attack”. Meanwhile, the photoacoustic (PA) imaging ability of the nanosystem enables the real-time monitoring of the inflammatory hypoxia, which is the “flag” to be captured in HIRI treatment. The photothermal preprotection can activate heat shock factor 1 (HSF-1), while the pharmaceutical therapy directly attacks NF-κB, both of which eventually inhibits NLRP3 inflammasome, thus reducing the activity of proinflammatory cytokine IL-1β, ending up with the alleviation of necrosis and apoptosis in HIRI. Such treatment effect can be reported by the real-time PA imaging. By the organic combination of the above three-step mechanism, significantly enhanced therapeutic efficacy was achieved in the animal model of HIRI, providing an effective solution for overcoming the challenge of HIRI.
研究领域:
纳米技术
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药学
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医学影像
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移植医学
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炎症生物学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）