Biomass Conversion and Biorefinery
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2025
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IF 4.1
Han Xue
To address the contamination of water bodies by heavy metal, β-cyclodextrin modified magnetic sludge biochar (β-CD@MBC) was synthesized from urban sludge via a chemical co-precipitation method for removing Pb 2 ⁺ from aqueous solution. The structural and morphological characteristics of the material were analyzed using various characterization techniques, and the adsorption performance for Pb 2 ⁺ was evaluated through single-factor experiments. Results indicated an increase in the number of surface functional groups in β-CD@MBC compared to the original sludge biochar (BC) and magnetic sludge biochar (MBC). Both pseudo-second-order and Langmuir models effectively described the remova l process. The actual maximum adsorption capacity of β-CD@MBC at 298 K reached 444.96 mg/g, significantly higher than that of the BC (71.82 mg/g) and MBC (172.32 mg/g). Thermodynamic suggested that the remova l reactions were a spontaneous endothermic process. The removal of Pb 2 ⁺ by β–CD@MBC was influenced by the combined effects of complexation, electrostatic interactions, cation-π interactions, and co-precipitation. After five desorption cycles, the Pb 2 ⁺ removal capacity of β-CD@MBC for 100 mg/L Pb 2 ⁺ decreased by 17.29%, which was lower than that of BC (71.53%) and MBC (39.80%). These results suggested that β-CD@MBC held significant potential for removing Pb 2+ .
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CEMENT AND CONCRETE RESEARCH
·
2024
·
IF 10.9
Miao Ren,Peiliang Shen,Yong Tao,Chi-sun Poon
Carbonation of calcium silicate (CS) minerals to produce hardened construction materials has attracted increasing interest, but the efficiency of conventional CS minerals is low. This study prepared a highly reactive β-C 2 S derived from a C-S-H precursor through hydrothermal synthesis . The potential CO 2 uptake ability, product compositions, microstructural characteristics , and carbonation mechanisms of the hydrothermal β-C 2 S were investigated. The results showed that the hydrothermal β-C 2 S achieved 3.7 times higher carbonation efficiency compared to the reference β-C 2 S prepared by traditional calcination and reached a carbonation degree of 56.1 % within 10 min. Its high reactivity was attributed to large specific surface area, unique thin lath structure, and fine grain size . The novel type of C-S-H produced, special thin lath structure evolution and sufficient ACC led to an almost complete carbonation degree of hydrothermal β-C 2 S. The developed carbonation process could be used to valorize recycled concrete waste which contains a large amount of C-S-H.
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ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Zhimin Li,Dongming He,Yimin Zhou,Zi-Yu Zhang,Zhongai Hu,Xiaoquan Lu
Nonylphenol (NP) is an important fine chemical raw material and intermediate that is widely utilized in industry and may be distributed in aquatic ecosystems. Following its entry into the food and water cycles, it can subsequently enter the human body and potentially harm the human reproductive system. For the purpose of monitoring NP in water, it is thus essential to build a straightforward, affordable, and robust electrochemical sensor. Based on a two-step chemical modification proceeding and an electrostatic self-assembly effect, a double-modified β-cyclodextrin functionalized multiwalled carbon nanotube sensor (HE-β-CD-CTAC/F-MWCNTs) has been successfully constructed. It incorporates the excellent host–guest interaction ability of β-cyclodextrin and the high chemical activity of cetyltrimethylammonium chloride (CTAC), and the carbon nanotubes have an enormous particular surface area and strong electrical conductivity. The electrochemical oxidation reaction of NP with the sensor is controlled by a surface adsorption process of equal numbers of protons and electrons. In accordance with the optimized experimental parameters, the limit of detection (LOD) for the sensor is 0.13 μM, and it responds linearly to NP in the concentration range of 1–200 μM. Meanwhile, the sensor has excellent repeatability, stability, and immunity to interference. For the detection of NP in real water samples, the sensor also showed an excellent recovery rate (92.8%–98.5%) and relative standard deviation (1.16%–3.26%).
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Journal of Energy Storage
·
2024
·
IF 8.9
Rong Han,Yusong Pan,Chao Du,Yanlei Xiang,Yuanqing Wang,Hongwu Zhu,Chengjie Yin
Aqueous zinc ion batteries (AZIB) have become a research hotspot for energy storage systems (ESS) in recent years due to some advantages such as their low risk and low cost. However, the structural collapse during charging and discharging affects the reversibility of the battery , which is a very serious blow to manganese-based materials and will affect their subsequent development in batteries. Therefore, β-MnO 2 cathode materials doped by the rare earth element europium (Eu) were prepared by a simple hydrothermal method . Compared with β-MnO 2 , Eu-doped MnO 2 possessed a high specific capacity of 409 mA h g −1 at 0.2 A g −1 . The initial specific capacity of Eu-doped MnO 2 at 1 A g −1 was 200.23 mA h g −1 and the maximum discharge specific capacity of 254 mA h g −1 was reached at 128 cycles. The energy storage mechanism of the electrodes was investigated by ex-situ XRD and ex-situ XPS tests. It was found that Eu element doping to β-MnO 2 not only maintains the stability of the crystal structure during redox reaction, but also promotes the embedding reaction of H + /Zn 2+ . The combination of rare earth elements Eu and MnO 2 is a new direction in the development path of aqueous zinc ion batteries.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
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IF 9
Xuan Wang,Jiaojiao Duan,Weiliang Li,Xiaoli Wu,Yong Wang,Mingjie Wei,Yifan Li,Runnan Zhang,Jingtao Wang
Covalent organic framework (COF) materials hold significant promise for membrane technology due to their precisely defined porous structures and tunable functionalities. However, the stability of COF membranes in organic solvents, critical for long-term operation, has seldom been studied and remains unclear. This study synthesizes three β-ketoenamine type COF membranes with different amounts of sulfonate groups via vacuum-assisted assembly and systematically evaluates their stability in four typical organic solvents (alcohol, ketone, ester, and alkane), respectively. We investigated the time-dependent membrane morphologies, thickness swelling, and long-term organic solvent nanofiltration (OSN) performance within a period of up to 180 days. Although the COF membranes suffer from a certain degree of structural change and permeance decline during the initial testing period, they can finally achieve quite stable separation performance. The effects of solvent type and the number of –SO 3 H groups on membrane stability are systematically discussed. Based on the evaluation methods adopted in this study, the prospects of COF membranes for long-time application in organic solvent can be highlighted, but some critical problems are also raised. We also investigate the swelling behavior under harsh conditions (e.g. elevated temperature, strong acids, and alkalis) to accelerate the swelling process, which is found to enable fast and effective evaluation of the long-term stability.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Liang Li,Yajie Zhao,Anqiong Mou,Xin Shen,Zhendong Liu,Zhang Luo
Non-starch polysaccharides are added to grains as dietary fiber to enhance their processing characteristics. This study investigates the influence of highland barley β-glucan (HBBG) on the gelatinization, texture, rheological, structural, and retrogradation characteristics of corn starch (CS). The pasting analysis revealed that the trough, peak, and final viscosities of the CS gel were markedly decreased after HBBG addition. Rheological analysis indicated reduced viscosity, flow behavior, and elasticity of the gels following HBBG addition. Fourier Transform Infrared Spectroscopy (FTIR) displayed a red shift in wavenumber, suggesting increased hydrogen bonding interactions induced by HBBG. HBBG increased water holding in CS and reduced hardness by forming hydrogen bonds with the starch. Specifically, the hardness of CS containing 20 % HBBG decreased from 290.32 g to 66.1 g. X-ray diffraction indicated 7.98 and 8.58 % reductions in CS gels with 20 % HBBG after 24 h and 7 days of retrogradation, respectively. These findings offer valuable insights for the formulation of functional foods designed for elderly individuals.
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NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 36
·15884-15893
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IF 2.7
Dong Ju Zhou,Wei Ming Liu,Su Ping Dai,Shuai Qiang Jiang,Yin Wang,Jia Jia Yang,Ya Wei Chen,Jun Liang Chen,Hyun Jin Park,Hui Yun Zhou
In our work, serine-modified β-cyclodextrin (Ser-β-CD) was synthesized and a berberine hydrochloride (BBH)/Ser-β-CD inclusion complex (IC) was prepared using the freeze-drying method. Phase solubility studies showed that BBH and Ser-β-CD formed stable inclusion complexes in a stoichiometric ratio of 1 : 1. The IC was characterized using SEM and FT-IR analyses. The results of molecular docking showed that BBH was completely contained in the Ser-β-CD cavity and the binding energy was −7.87 kcal mol−1. The results of in vitro release studies indicated that BBH could be released slowly from the IC. In addition, the prepared Ser-β-CD and IC had good biocompatibility. The IC demonstrated excellent antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). Therefore, the BBH/Ser-β-CD IC has potential application prospects in biomedicine and food industry.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
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IF 12.2
Xiaoli Gou,Yongchun Fu,Juan Li,Juan Xiang,Minghui Yang,Yi Zhang
Nanoplastics , widely existing in the environment and organisms, have been proven to cross the blood-brain barrier, increasing the incidence of neurodegenerative diseases like Alzheimer’s disease (AD). However, current studies mainly focus on the neurotoxicity of nanoplastics themselves, neglecting their synergistic effects with other biomolecules and the resulting neurotoxicity. Amyloid β peptide (Aβ), which triggers neurotoxicity through its self-aggregation, is the paramount pathogenic protein in AD. Here, employing polystyrene nanoparticles (PS) as a model for nanoplastics, we reveal that 100 pM PS nanoparticles significantly accelerate the nucleation rate of two Aβ subtypes (Aβ 40 and Aβ 42 ) at low concentrations, promoting the formation of more Aβ oligomers and leading to evident neurotoxicity. The hydrophobic surface of PS facilitates the interaction of hydrophobic fragments between Aβ monomers , responsible for the augmented neurotoxicity. This work provides consequential insights into the modulatory impact of low-dose PS on Aβ aggregation and the ensuing neurotoxicity, presenting a valuable foundation for future research on the intricate interplay between environmental toxins and brain diseases.
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Biotechnology for Biofuels and Bioproducts
·
2024
·Vol. 17
·期 1
·1-12
·
IF 3.3
Zhang Bin,Gou Kexin,Xu Kexin,Li Zhimin,Guo Xiaoyan,Wu Xiaoyu
Background β-Arbutin, a hydroquinone glucoside found in pears, bearberry leaves, and various plants, exhibits antioxidant, anti-inflammatory, antimicrobial, and anticancer effects. β-Arbutin has wide applications in the pharmaceutical and cosmetic industries. However, the limited availability of high-performance strains limits the biobased production of β-arbutin. Results This study established the β-arbutin biosynthetic pathway in C. glutamicum ATCC13032 by introducing codon-optimized ubiC , MNX1 , and AS . Additionally, the production titer of β-arbutin was increased by further inactivation of csm and trpE to impede the competitive metabolic pathway. Further modification of the upstream metabolic pathway and supplementation of UDP-glucose resulted in the final engineered strain, C. glutamicum AR11, which achieved a β-arbutin production titer of 7.94 g/L in the optimized fermentation medium. Conclusions This study represents the first successful instance of de novo β-arbutin production in C. glutamicum , offering a chassis cell for β-arbutin biosynthesis.
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ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Jia Chen,Qi Liu,Yongchun Fu,Juan Xiang
Low-mass soluble β-amyloid peptide oligomers (LSAβOs) play a crucial role in the pathogenesis of Alzheimer’s disease. However, these oligomers exhibit heterogeneity in terms of structure, stability, and stoichiometry, and their abundance in biofluids is low, making accurate identification challenging. In this study, we developed a DNA nanocage-assisted method for selective sizing and sensitive quantification of LSAβOs in serum. Using LSAβO less than 10 kDa (LSAβO10kD) and less than 30 kDa (LSAβO30kD) as models, the size-matching rules between DNA nanocages and LSAβOs were investigated, and two appropriate nanocages were selected for the detection of two LSAβOs, respectively. Both nanocages were functionalized by encapsulating oligomer’s aptamer and a complementary sequence within their cavities. Once the LSAβO entered the corresponding nanocage cavity, the complementary sequence was released, triggering a hybridization chain reaction on an electrochemical sensing platform. The system achieved size-selective discrimination of LSAβO10kD with a linear range of 10–150 pM and LSAβO30kD with a linear range of 15–150 pM. Real sample testing confirmed the applicability of the method for blood-based diagnosis. The DNA nanocage-assisted electrochemical analysis platform provides an accurate, highly selective, and sensitive approach for oligomer analysis, which is significant for amyloid protein research and related disease diagnosis.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Mingfang Ma,Xinran Liu,Liuyang Dong,Ya Huang,Yingle Li,Huiyuan Chen,Ruibin Lan,Aiyou Hao,Zengyang Xie,Wenqing Shang
As a natural cyclic oligosaccharide , β-Cyclodextrin with cavity structure has excellent water solubility and biocompatibility , which makes it highly valuable in the field of supramolecular self-assembly. Although the self-assembly of β-Cyclodextrin into supramolecular gels has been reported by our group, the impact of metal ions on β-Cyclodextrin supramolecular gels has not yet been studied. Herein, a β-Cyclodextrin supramolecular gel was prepared firstly and then the effects of six different metal ions on this gel system were investigated systematically. It was found that tubular stacking induced by hydrogen bond is the main driving force for the self-assembly of β-Cyclodextrin into β-Cyclodextrin supramolecular gels. Moreover, the introduction of metal ions did not hinder the formation of β-Cyclodextrin supramolecular gels. On the contrary, the metal coordination interaction between metal ions and β-Cyclodextrin stabilized the tubular stacking state of β-Cyclodextrin, thereby promoting the formation of β-Cyclodextrin supramolecular gels. This research not only deepens the study of β-Cyclodextrin supramolecular gels but also lays a solid foundation for their application in intelligent materials, drug delivery, and ion channels, among other fields.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2024
·
IF 6.2
Pan Song,Dong Lv,Luchen Yang,Jing Zhou,Xin Yan,Zhenghuan Liu,Kai Ma,Yunfei Yu,Xiaoyang Liu,Qiang Dong
Di-(2-ethylhexyl) phthalate (DEHP) might led to chronic and long-term effects on human organs due to its widespread use and bioaccumulation. Despite some cohorts reporting an association between DEHP exposure and BPH, its underlying mechanisms have not been investigated. Our findings indicate that exposure to DEHP or MEHP (main metabolites of DEHP in the human body) leads to increased prostate weights, elevated prostate index, and notable epithelial thickening in rats. It has been observed to promote BPH-1 cell proliferation with effects ranging from low to high concentrations. Transcriptome sequencing analysis of rat prostate tissues identified KIF11 as the key hub gene. KIF11 is highly expressed after DEHP/MEHP exposure, and knocking down of KIF11 inhibits the MEHP-induced promotion of cell proliferation. Exposure to MEHP has been observed to increase the expression of p-GSK-3β and elevate the levels of β-catenin, thereby activating the Wnt/β-catenin signaling pathway. Knocking down of KIF11 significantly inhibits these effects. Histone H3 at Lysine 27 acetylation (H3K27ac) is implicated in the upregulation of KIF11 expression, as evidenced by the addition of the acetylation inhibitor C646. In summary, our findings established that DEHP exposure could promote BPH through H3K27ac regulated KIF11/Wnt/β-catenin signaling pathway.
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