INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Xiangli Kong,Dawei Gong,Wei Ke,Minghui Qiu,Kaiyun Fu,Peng Xu,Xianfu Chen,Yiqun Fan
A ceramic membrane with multichannels generally has a higher specific area and larger throughput compared to that with a single channel, which is beneficial to the industrialization of ceramic membrane contactors for SO2 absorption. In this work, the mass transfer performance of SO2 absorption into NaOH solution was investigated at various gas and liquid operating conditions in a membrane contactor packed with a 19-channel hydrophilic membrane. The results showed that increasing the NaOH concentration can offset the effect of membrane thickness. To analyze the mass transfer process, a 3D mass transfer model was developed to simulate the concentration distribution of the components. The simulated SO2 fluxes were consistent with the experimental results. Additionally, the mass transfer model was applied to optimize the structure of channels in multichannel ceramic membranes. The operational mode of the multichannel ceramic membrane is optimized by blocking some inside channels to reduce the mass transfer resistance.
研究领域:
化学工程
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环境工程
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膜技术
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传质
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
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2021
·Vol. 30
·期 5
·3795-3805
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IF 1.819
Mao Xisong,Xia Xuewen,Li Junqi,Chen Chaoyi,Zhang Junshan,Ning Deyang,Lan Yuan-Pei
Homogeneously rare-earth (RE=La, Sm and Y) ions doped CeO 2 nanoparticles (NPs) with enhanced photocatalytic performance were synthesized by a facile KOH-NaOH molten flux method. XRD, TEM, EDS mapping and XPS results demonstrate that RE cations have been successfully doped into the CeO 2 lattice, which leads to the lattice expansion/shrinking, and more oxygen vacancies are generated after RE ions doping. The UV-Vis DRS and PL spectra indicate that RE-doped CeO 2 samples have slightly narrower band gaps and significantly reduced photo-generated electron-hole recombination rates. 5% RE ions doped CeO 2 NPs show excellent photocatalytic performances and the photodegradation ratio of methylene blue (MB) increases from 71.63% of undoped CeO 2 to 76.35%, 77.51% and 77.37% for 5%-La, 5%-Sm and 5%-Y-doped CeO 2 NPs, respectively. The obviously reduced recombination rate of e − /h + pairs after RE ions doping may be the critical factor for the enhanced photocatalytic performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CORROSION SCIENCE
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2018
·
IF 4.862
Zhenzhen Jin,Yubing Qiu,Zhenyu Chen,Xingpeng Guo
The effect of doping anions on the degradation of electrochemical activity of polypyrrole (PPy)/A (A: SO 4 2− , pTS − , PSS − , and GO) films in NaOH is investigated by various electrochemical methods and microscopic analyses. The degradation rates of PPy/A films follow first-order k inetics. The PPy/SO 4 and PPy/GO films have two degradation stages with higher rate constants ( k ), while the PPy/pTS and PPy/PSS films just show one degradation stage with much lower k values. The exchange ability of doping anions with OH − and the penetration of OH − into the inner film are two crucial factors for the degradation of PPy in NaOH.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Biotechnology for Biofuels
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2012
·Vol. 5
·期 1
·1-12
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IF 6.088
Xu Ning,Zhang Wei,Ren Shuangfeng,Liu Fei,Zhao Chunqiao,Liao Haofeng,Xu Zhengdan,Huang Jiangfeng,Li Qing,Tu Yuanyuan,Yu Bin,Wang Yanting,Jiang Jianxiong,Qin Jingping,Peng Liangcai
Background Lignocellulose is the most abundant biomass on earth. However, biomass recalcitrance has become a major factor affecting biofuel production. Although cellulose crystallinity significantly influences biomass saccharification, little is known about the impact of three major wall polymers on cellulose crystallization. In this study, we selected six typical pairs of Miscanthus samples that presented different cell wall compositions, and then compared their cellulose crystallinity and biomass digestibility after various chemical pretreatments. Results A Miscanthus sample with a high hemicelluloses level was determined to have a relatively low cellulose crystallinity index (CrI) and enhanced biomass digestibility at similar rates after pretreatments of NaOH and H 2 SO 4 with three concentrations. By contrast, a Miscanthus sample with a high cellulose or lignin level showed increased CrI and low biomass saccharification, particularly after H 2 SO 4 pretreatment. Correlation analysis revealed that the cellulose CrI negatively affected biomass digestion. Increased hemicelluloses level by 25% or decreased cellulose and lignin contents by 31% and 37% were also found to result in increased hexose yields by 1.3-times to 2.2-times released from enzymatic hydrolysis after NaOH or H 2 SO 4 pretreatments. The findings indicated that hemicelluloses were the dominant and positive factor, whereas cellulose and lignin had synergistic and negative effects on biomass digestibility. Conclusions Using six pairs of Miscanthus samples with different cell wall compositions, hemicelluloses were revealed to be the dominant factor that positively determined biomass digestibility after pretreatments with NaOH or H 2 SO 4 by negatively affecting cellulose crystallinity. The results suggested potential approaches to the genetic modifications of bioenergy crops.
研究领域:
植物学
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生物能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2018
·Vol. 42
·期 8
·6274-6282
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IF 3.201
Shuang Chen,Hao Wu,Jing-han Hua,Jing-wen Yang,Hong-bin Zhang,Xue-qin Hu
Dextran is a polysaccharide with a high medicinal value. Thus, the chemical modifications of dextran, and the structural and physicochemical properties of its derivatives should be given focus. Dextran (Mw 5000 Da to 7500 Da) can complex with iron. In this study, dextran (Mw 5400 Da) was modified at different pH levels (8–14) by using NaOH and NaClO/NaBr. The carboxyl groups of the modified dextran were determined using infrared spectroscopy, and the carboxyl contents were compared. The results of high-performance liquid chromatography indicated that dextran was degraded during the modification. The crystallization and the structure of the carboxyl-modified dextran were investigated using X-ray diffraction, nuclear magnetic resonance, and quadrupole time-of-flight mass spectrometry. The physicochemical properties, i.e., solubility, and granule morphology, of the carboxyl-modified dextran were carefully characterized and compared. This work provides a theoretical foundation for the accurate selection of carboxyl-modified dextran and the development of a novel strategy for the preparation of metal complexes.
研究领域:
生物化学
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材料科学
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产品关联
DOI
高影响因子
iScience
·
2023
·
IF 5.8
Yawen Zhao,Na Zhang,Xuemei Chen
In this paper, the municipal solid waste incineration bottom ash (MSW-IBA) is used as the fine aggregate and firming agent component of the premixed fluid stabilized soil (PFSS). Through the mechanical strength test, and the hydration products and microstructure characterization, the effects of the NaOH content for MSW-IBA pre-aging treatment and activator content on the mechanical properties of the PFSS are studied. The results show that the mechanical strength of the prepared PFSS is closely related to the amount of NaOH and the activator. The increase in the amount of NaOH and activator can affect the formation of early hydration product Aft, and reduce the early strength. However, it can promote the depolymerization of glass phase in MSW-IBA and slag to form C-(A)-S-H and Mg-(A)-S-H gel, increase the microstructure density, and thus improve the late strength. The application of MSW-IBA in PFSS can achieve the recycling of solid waste.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
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2025
·
IF 6.4
Ge Yang,Yaozuo Zhou,Mengling Sun,Lei Zhao,Hao Wu,Hailing Guo,Soryong Chae,Svetlana Mintova
The development of adsorptive membranes that combine high radionuclide removal efficiency with structural and radiation stability remains a major hurdle in aqueous separation materials. Herein, we present a novel interface-engineering strategy to fabricate covalently crosslinked zeolite–graphene oxide (GO) membranes. Specifically, NaOH-mediated in situ crystallization of EMT-type zeolite precursors within GO nanosheet assemblies concurrently induces formation of Si–O–C covalent linkages, thereby integrating the inorganic and carbon components at the molecular interface. The resulting membrane manifests a stabilized layered architecture, expanded interlayer spacing, and enhanced ion-accessible active sites while retaining GO's hydrophilicity. It exhibits high adsorption capacities toward Cs+ (199.0–224.4 mg g−1) and Sr2+ (290.6–302.8 mg g−1) ions, sustained operation across a wide pH range, and superior durability under γ-irradiation.
研究领域:
材料科学
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环境工程
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核化学
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膜技术
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吸附
✓ 已验证
产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2025
·
IF 6.6
Ying Cheng,Manyu Yuan,Yiwei Liu,Zongyuan Wu,Weinong Zhang,Guoyu Wang,Yanxia Cong
Degumming is critical for downstream refining efficiency and edible oil quality, but conventional water degumming is incomplete, while enzymatic degumming is slow. This study developed a green and energy-efficient hybrid degumming process, combining instantaneous citric acid chelation with trace sodium hydroxide (NaOH) flocculation. Plackett-Burman screening and Box-Behnken optimization determined the optimal conditions: 339 mg/kg citric acid, 167 mg/kg NaOH, 1.76 % water at 70 °C, which reduced residual phosphorus to 0.22 mg/kg (lower than acid degumming and enzymatic degumming). Confocal laser scanning microscopy (CLSM) showed that NaOH-induced charge neutralization promoted rapid phospholipid flocculation. This process reduced citric acid consumption to 10 % of that in acid degumming, used only 0.017 % NaOH, and shortened degumming time by 30 min compared to acid degumming and 2–4 h compared to enzymatic processes. It aligns with sustainable development goals by cutting chemicals, energy, and emissions.
研究领域:
食品科学与技术
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绿色化学
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油脂加工工程
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
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2012
·
IF 4.98
Fengcheng Li,Shuangfeng Ren,Wei Zhang,Zhengdan Xu,Guosheng Xie,Yan Chen,Yuanyuan Tu,Qing Li,Shiguang Zhou,Yu Li,Fen Tu,Lin Liu,Yanting Wang,Jianxiong Jiang,Jingping Qin,Shizhong Li,Qiwei Li,Hai-Chun Jing,Fasong Zhou,Neal Gutterson,Liangcai Peng
Xylans are the major hemicelluloses in grasses, but their effects on biomass saccharification remain unclear. In this study, we examined the 79 representative Miscanthus accessions that displayed a diverse cell wall composition and varied biomass digestibility . Correlation analysis showed that hemicelluloses level has a strong positive effect on lignocellulose enzymatic digestion after NaOH or H 2 SO 4 pretreatment. Characterization of the monosaccharide compositions in the KOH-extractable and non-KOH-extractable hemicelluloses indicated that arabinose substitution degree of xylan is the key factor that positively affects biomass saccharification. The xylose/arabinose ratio after individual enzyme digestion revealed that the arabinose in xylan is partially associated with cellulose in the amorphous regions, which negatively affects cellulose crystallinity for high biomass digestibility. The results provide insights into the mechanism of lignocellulose enzymatic digestion upon pretreatment, and also suggest a goal for the genetic modification of hemicelluloses towards the bioenergy crop breeding of Miscanthus and grasses.
研究领域:
植物学
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生物能源
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遗传改良
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2025
·
IF 2.9
Qianqian Peng,Chengxuan Zhou,Shucan Qin,Jinbiao Liang,Shengyun Xu,Jiaming Mao,Jianming Shi,Yanrong Liu,Yunqian Ma
Electrochemistry allows for the simultaneous conversion of hydrogen sulfide (H2S) to hydrogen (H2) and sulfur, achieving atomic economy, and is a sustainable and cost-effective method. At the same time, an electrolyte with high conductivity and H2S absorption that can effectively capture H2S in an electrochemical process is essential. An ionic liquid electrolyte system for the absorption and electrolysis of H2S was constructed using the guanidine salt ionic liquid with amine-based functional groups as the carrier electrolyte, water as the solvent, and NaOH as the H2S absorber. The prepared electrolyte ([TMG][IM]-AE-30) showed a strong absorption of H2S with an equilibrium solubility of 100.82 g L−1. Under constant potential electrolysis at 1.0 V vs. RHE, the maximum hydrogen production rate reaches 2919.97 μmol h−1 and the Faraday efficiency reaches 99%, and the anodic product is α-sulfur with a production of 0.881 g after electrolysis for 8 h; the current density and hydrogen production rate are still higher than those of the AE systems after three cycles. Overall, the system has good hydrogen sulfide absorption and electrolysis performances, and [TMG][IM] can effectively improve the H2S absorption and electrolysis efficiencies.
研究领域:
电化学
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环境科学
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能量转换
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2026
·
IF 5.7
Tao Zhang,Yugang Zhou,Wei Fang
A ZrO 2 -PSU composite membrane with asymmetric structure was developed for chlor-alkali electrolysis. • ZrO 2 addition enhanced hydrophilicity and reduced area resistance but lowered bubble point pressure. • The membrane reactor achieved high Faradaic efficiencies (>96% for HER and > 98% for CER) with considerable NaOH yield. • The zero-gap electrolyzer delivered 3.33 V at 100 mA cm −2 over 20 h with robust structural and chemical stability. The chlor-alkali process is a vital industrial route for the production of chlorine (Cl 2 ), hydrogen (H 2 ), and sodium hydroxide (NaOH). However, conventional ion-exchange membrane-based technologies face challenges related to high cost, limited durability, and susceptibility to fouling and degradation under harsh operating conditions. Here, we report a zirconium dioxide-polysulfone (ZrO 2 -PSU) composite membrane reactor that enables simultaneous and efficient Cl 2 and H 2 /NaOH production via chlor-alkali electrolysis. The composite membrane, fabricated via phase inversion tape casting, integrates ZrO 2 nanoparticles into a porous PSU matrix, achieving a well-defined asymmetric structure with a dense top layer and a finger-like porous bottom layer. The optimized composite membrane ( Z -PSU-70) exhibits lowest area resistance, enhanced hydrophilicity, and effective gas barrier properties. In an H-type electrolysis cell using a nickel mesh cathode and a RuO 2 @carbon paper anode, the reactor delivers stable cell voltages and high Faradaic efficiencies (>96% for H 2 and > 98% for Cl 2 ) with minimal gas crossover. Furthermore, a zero-gap flow cell configuration achieves a low cell voltage of approximately 3.33 V at 100 mA cm −2 , with stable performance over 20 h. Post-electrolysis characterizations confirm the structural and chemical stability of both the membrane and electrodes. This work presents a cost-effective and high-performance membrane reactor design, offering a promising pathway toward more sustainable and efficient chlor-alkali electrolysis.
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
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2020
·
IF 3.862
Yejun Luo,Suqin Deng,Zheng Li,Lijiu Cao,Yuan He,Yufang Chen,Tao Jin
Hydrophobic modified cotton filter fabric is a key material in the chemical industry, as it is used in common industrial filtration and precision separation processes. Most studies have focused on improving the hydrophobicity of cotton filter fabric. However, the hydrophobic durability, which is the most critical factor that determines the application scope of the material, remains unaddressed. Herein, we report that CS 2 activation and subsequent 1-octadecene graft copolymerization via ARGET-ATRP of the cotton filter fabric leads to a modified material that is largely superior to the traditional cotton filter fabric. The modified cotton filter fabric exhibits high hydrophobicity, with an initial water contact angle of 141.0° and excellent hydrophobic durability, as demonstrated by the residual water contact angle of 126.7° after a 150 min droplet holding time. Moreover, the modified hydrophobic sample fabric was resistant to a variety of physical stresses and chemicals, maintaining its hydrophobic properties following multiple resistance tests, such as immersion in oily water for 10 days, immersion in organic solvents for 72 h, or when subjected to UV radiation for 24 h.
研究领域:
化学工程
·
材料科学
✓ 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）