Journal of Materials Chemistry A
·
2024
·
IF 10.7
Tao Chen,Yulong Li,Fangpei Ma,Mingdong Sun,Ping Fu,Xiaoling Liu,Yu Zhou,Jun Wang
Paired electrocatalytic systems have emerged as a promising approach for the synthesis of high-value-added fine chemicals from renewable resources like biomass, however, a high-performing bifunctional catalyst is urgent to reduce the overall cell voltage and enhance the current efficiency. Herein, amino-tethered Ni3S2/MoS2 heterojunction (NiMoSx-NH2) was constructed as the bifunctional catalyst simultaneously for the anodic 5-Hydroxymethylfurfural oxidation into furan dicarboxylic acid and cathodic 4-nitrophenol hydrogenation into P-aminophenol, providing the high conversion/yield/Faradic efficiency above 98% on both electrodes. Amino-tethered Ni3S2/MoS2 heterojunction, on the one hand, accelerated the electron transfer, and on the other hand, promoted the catalysts’ proton-coupled electron transfer process to generate NiIII-O(OH)ad at the anode and H* desorption at the cathode. A highly efficient paired electrolyzer with NiMoSx-NH2 as a bifunctional catalyst was assembled, showing an extremely low cell voltage of 0.89 V at 10 mA cm-2 and ~200% current efficiency at 1.75 V for the overall reaction.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Lulu Deng,Shuang Yang,Hailong He,Jie Chen,Chenyuan Zhang,Zhongqi Liu,Lei Wang
The extensive production and utilization of polyethylene terephthalate (PET) products results in significant environmental pollution and waste of resources. This has focused global attention on the development of radical PET waste management strategies. Solvent-based dissolution and precipitation is a promising approach for recovering plastic from waste due to its “polymer-to-polymer” principle. However, most solvents currently used are toxic and not environmentally friendly. Herein, we have screened a bio-based solvent via Hansen Solubility Parameters (HSPs) and Conductor-like Screening Model for Real Solvents (COSMO-RS), dimethyl isosorbide (DMI), and applied it to PET recovery. DMI showed a favorable solubility (0.30 g mL −1 ) of PET in 8 min at 180 °C. Nuclear magnetic resonance (NMR) analysis and molecular dynamic (MD) simulation were combined to reveal the hydrogen bonding interaction and van der Waals interactions together contribute to the excellent PET dissolution performance. Moreover, the properties of recycled PET were similar to those of virgin PET, with minimal degradation (∼1.25 %) and negligible loss of thermal performance. DMI has satisfactory dissolution performance in Polystyrene (PS), Polyvinyl Chloride (PVC), and polylactic acid (PLA) and can effectively separate mixture plastics and multilayer films by reaction temperature-controlled and select solubility. Additives can be released to the solution system by the accessibility of the DMI, and separation from R-PET with ethanol rinse. This work provides an energy-efficient, and solvent-based process for recycling plastic waste to produce virgin-quality PET as secondary raw materials to adapt to market demand while reducing the consumption of fossil resources.
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JOURNAL OF SEPARATION SCIENCE
·
2024
·Vol. 47
·期 1
·2300545
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IF 2.8
Chen Yang,Jing-Wen Zhang,Jin Qi,Bo-Yang Yu
Pseudoallergy is a typical and common adverse drug reaction to injections, especially in traditional Chinese medicine injections (TCMIs). At present, the evaluation methods for pseudoallergy include cell methods in vitro and animal methods in vivo. The mast cell evaluation method based on the β-hexosaminidase (β-Hex)-catalyzed substrate, 4-nitrophenyl-β-N-acetyl-D-glucosaminide (4-NPG), is an important method for the evaluation of drug-induced pseudoallergy, but it is prone to false positive results and has insufficient sensitivity. In this study, a novel β-Hex evaluation system with rat basophilic leukemia-2H3 cells based on high-performance liquid chromatography-fluorescence detection (HPLC-FLD) was established, which effectively increased the sensitivity and avoided false positive results. Cell viabilities were measured by 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl tetrazolium bromide assay. In addition, a method for the determination of histamine, which is another indicator in the development of pseudoallergy, was established to validate the above method. The results of this novel method indicated that two TCMIs (Shuxuening injection and Shenqi Fuzheng injection), which were considered to be pseudoallergenic using 4-NPG, were not pseudoallergenic. Overall, the novel β-Hex/HPLC-FLD evaluation system using Rat basophilic leukemia-2H3 cells established was effective and precise. It could be used for the evaluation of pseudoallergic reactions caused by TCMIs and other injections.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Renjie Zhao,Jia Yao,Chi Li,Qiannan Liu,Wei Liu,Liang Zhang,Zhenzhen Zhang,Ruixuan Zhao,Honghai Hu
Interactions between polyphenols and starch affect the quality of starch-based products. In this study, we investigated the interaction between caffeic acid (CA) and starches with different structures (lotus seed starch (LSS) and potato starch (PS)) after freeze-thaw, and the effects of CA on the physicochemical properties of starch. The results show that CA has distinct effects on starch, driven by differences in the multiscale structure. LSS exhibited a stronger binding capacity to CA based on complexing index and iodine binding analysis. Hydrogen bonding was identified as the primary driving force between CA and starch chains of LSS and PS supported by Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). After addition of CA, the thermodynamic parameters and swelling power of LSS increased, whereas those of PS decreased, which was attributed to variations in the interactions between the -OH groups of CA and amylopectin/amylose through hydrogen bonding. Rheological, textural, and microstructural analyses revealed that CA decreased the viscoelasticity, gelation ability, textural characteristics of both starch gels, and disrupted the starch gel network, with LSS being the most affected. This study provides a theoretical basis for adjusting the quality of frozen starch-based foods based on the interactions between polyphenols and starch.
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Nano Research
·
2024
·
IF 9.5
Liu Weiruo,Zhu Yanbin,Wang Jiwei,Feng Haisong,Zhai Yunpu,Li Wei,Zhao Dongyuan
Highly dispersed Pd/N-doped carbon dots (Pd/NCDs) were successfully immobilized in the mesoporous channels of amino-functionalized dendritic mesoporous silica nanospheres (NMS). The synthesized Pd/NCDs@NMS catalyst exhibits outstanding performance in the catalytic reduction of 4-nitrophenol (4-NP), achieving a turnover frequency of 1461.8 mol·mol Pd −1 ·h −1 , with the conversion rate remaining above 80% after 11 cycles. Experiments and density functional theory calculations reveal that the NCDs significantly affect the electronic structure of Pd nanoparticles, leading to changes in the energy barriers for the adsorption of 4-NP at the Pd sites and the conversion of 4-NP reaction intermediates, which is a key factor contributing to the catalytic performance. This study offers a new strategy for synthesizing carbon-dot-modified metal-based catalysts.
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TOXICOLOGY
·
2024
·
IF 4.8
Linjing Xu,Huan Liu,Yifeng Rang,Lizi Zhou,Xukai wang,Yinhuan Li,Chunhong Liu
Nonylphenol (NP) and octylphenol (OP) are environmental contaminants with potential endocrine disrupting effects. However, there is limited research on the mechanisms and intervention of combined NP and OP exposure-induced neurotoxicity. This study aims to explore the cytotoxicity of combined NP and OP exposure and evaluate the potential of Lycium barbarum polysaccharides (LBP) in mitigating the aforementioned toxicity. In present study, LBP (62.5, 125 and 250 µg/mL) were applied to intervene rat adrenal pheochromocytoma (PC-12) cells treated with combined NP and OP (NP: OP = 4:1, w/w; 1, 2, 4 and 8 µg/mL). The results showed that NP and OP induced oxidative stress, disrupted the 5-hydroxytryptamine (5-HT) and cholinergic systems in PC-12 cells. Additionally, they activated the p38 protein kinase (p38) and suppressed the expression of silent information regulation type 1 (SIRT1), monoamine oxidase A (MAOA), phosphorylated cyclic-AMP response binding protein (p-CREB), brain-derived neurotrophic factor (BDNF) and phosphorylated tropomyosin-related kinase receptor type B (p-TrkB). However, N-acetyl-L-cysteine (NAC) treatment counteracted the changes of signalling molecule p38, SIRT1/MAOA and CREB/BDNF/TrkB pathways-related proteins induced by NP and OP. LBP pretreatment ameliorated combined NP and OP exposure-induced oxidative stress and neurotransmitter imbalances. Furthermore, the application of LBP and administration of a p38 inhibitor both reversed the alterations in the signaling molecule p38, as well as the proteins associated to the SIRT1/MAOA and CREB/BDNF/TrkB pathways. These results implied that LBP may have neuroprotective effects via p38-mediated SIRT1/MAOA and CREB/BDNF/TrkB pathways.
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Discover Oncology
·
2025
·Vol. 16
·期 1
·1-16
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IF 2.9
Wang Biao,Zhang Nianjie,Dai Lin,Zhang Yuanwei,Yin Shuo,Yang Xuefeng
Nonylphenol (NP) is a common environmental contaminant and endocrine disruptor. Our previous research demonstrated that NP could promote the proliferation and epithelial-mesenchymal transition (EMT) of colorectal cancer (CRC) cells; however, the specific mechanism remains unclear. miRNA sequencing revealed that NP upregulated the expression levels of microRNA(miR)-151a-3p in CRC. Analysis of The Cancer Genome Atlas (TCGA) data revealed increased expression levels of miR-151a-3p in CRC tissues. The present experiments showed that NP could activate the WNT/β-catenin signaling pathway, and promoted the migration and invasion of CRC cells by increasing the expression levels of miR-151a-3p. Through bioinformatics analysis and dual-luciferase reporter assays, Fyn-related kinase (FRK) was identified as a target gene of miR-151a-3p. Knockdown of FRK promoted NP-induced EMT in CRC cells and activated the WNT/β-catenin signaling pathway, while overexpression had the opposite effect. In summary, the present study demonstrated that NP could inhibit FRK expression via miR-151a-3p, activate the WNT/β-catenin signaling pathway, and promote EMT in CRC cells.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Peng Zhang,Minglu Sun,Juan Liang,Zhaokun Xiong,Yang Liu,Jiali Peng,Yue Yuan,Heng Zhang,Peng Zhou,Bo Lai
Solution pH is one of the primary factors affecting the efficiency of water decontamination . Although the influence of pH on oxidants activation, catalyst activity, and reactive oxygen species have been widely explored, there is still a scarcity of systemic studies on the changes in the oxidation behavior of organic pollutants at different pH levels. Herein, we report the influence laws of pH on the forms, reactivities, active sites, degradation pathways, and products toxicities of organic pollutants. Changes in pH cause the protonation or deprotonation of organic pollutants and further affect their forms and chemistry (e.g., electrostatic force , hydrophobicity , and oxidation potential). The oxidation potential of organic pollutants follows the order: protonated form > pristine form > deprotonated form. Moreover, protonation or deprotonation can modify the active sites and degradation pathways of organic pollutants, wherein deprotonation renders them more susceptible to electrophilic attack, while protonation reduces their activity against electrophilic and nucleophilic attacks. Additionally, pH adjustments can modify the degradation pathway and the toxicity of transformation products. Overall, pH changes can affect the oxidation fate of organic pollutants by altering their structure, which distinguishes it from the effect of pH on oxidants or oxidant activation processes.
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CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Sisi Yao,Dengkang Guo,Shenjie Han,Zongying Fu,Shaoyi Lyu,Jingpeng Li,Yun Lu
In contrast to conventional plant-based microreactors where the nanocatalyst is anchored on the inner walls of microchannel structures, this study presents a bamboo-based flow microreactor in which the metallic nanocatalyst is immobilized within polydopamine (PDA) region-modified bamboo microchannels. This novel design facilitates a large surface area for nanocatalyst loading, enhances mass transfer, and reduces nanocatalyst leaching. Firstly, the hierarchical PDA architecture was fabricated on the wall surface of required bamboo microchannels through an ammoniation-induced self-assembly process to serve as a nanocatalyst support layer. The thickness of PDA architectures was modulated by adjusting the flow duration. Secondly, the metallic nanoparticles (NPs), including Pd, Au, and Ag, were effectively immobilized within the hierarchical PDA architectures as highly efficient catalysts using a flow-assisted method with minimal chemical usage and low catalyst loading (Pd content: 0.011 wt%). The catalytic performances of the proposed Pd-PDA/bamboo microreactor were evaluated for the continuous hydrogenation of nitroaromatics under flow conditions, encompassing variations in Pd content, nitroaromatic concentration, and liquid flow rate. The optimized Pd-PDA/bamboo microreactor exhibited high average conversion (>97 %) of nitroaromatics during 20 days of continuous operation without any noticeable deactivation or loss in activity due to its excellent stability resulting from firm immobilization of active metallic NPs within hierarchical PDA architectures. Additionally, this bamboo microreactor demonstrated potential applicability in environmental pollution treatment through azo dye hydrogenation.
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Journal of Industrial Textiles
·
2024
·
IF 2.2
Zhendong Zhang,Jing Xiao,Chunyou Wang,Fangmiao Song,Wei Sun,Chenhui Wang,Zhisong Lu,Yan Zhang
Developing green fibrous materials with uniformly distributed metal nanoparticles for highly efficient and recyclable catalysis remains a major challenge. Herein, we developed a simple, effective, and green method to immobilize gold nanoparticles (AuNPs) on polydopamine (PDA)-functionalized silk fibers (SFs) for efficient catalytic reduction of 4-nitrophenol (4-NP). The density and size of AuNPs on the PDA-coated SFs can be tuned by adjusting precursor concentration and synthesis duration, respectively. The AuNPs-PDA-SFs catalysts prepared under optimized conditions could catalyze the reduction of 4-NP, 4-nitroaniline (4-NA), and 4-amino-3-nitrophenol (4-A-3-NP) at the apparent rate constants of 0.087, 0.091, and 0.063 min−1, respectively. After six rounds of flow-through reduction of 4-NP, the AuNPs-PDA-SFs could maintain a 4-NP conversion rate greater than 92%, indicating their superior reusability and consistent catalytic activity. Due to the protein properties of SFs, the AuNPs-PDA-SFs can be degraded by enzymes and alkali solutions. This work may provide new insights for designing advanced fiber-supported recyclable catalysts with high catalytic performance and reusability in wastewater treatment.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Longlong Geng,Fengting Geng,Xianghan Cheng,Xiaoli Wang,Ling Wang,Xuliang Pang,Yong-Zheng Zhang,Xiuling Zhang,Da-Shuai Zhang,Shujuan Zhuang,Abdukader Abdukayum,Guangzhi Hu
Copper is a crucial element in the field of catalysis. However, Cu-based catalysts exhibit lower redox properties and surface energy under mild conditions, which limit their electron transfer capacities and catalytic performance. In this study, the relationship investigation between the hydrogenation behavior of Cu-based catalysts and crystal phases showed that spherical Cu 2 O exhibited enhanced capacity for hydrogen activation, excellent catalytic activity and outstanding reusability in the selective reduction of various nitroarenes. At even 25 °C and 1 atm, the complete reduction of 4-nitrophenol by NaBH 4 was achieved in 2.5 min over Cu 2 O, achieving a reaction rate constant ( k ) of 20.15 × 10 −3 s −1 , which was 4.8 and 15.2 times that of CuO and Cu catalysts. Detailed experimental and theoretical calculations revealed that the Cu + sites in the antifluorite crystal phase of Cu 2 O are conducive to the adsorption of active H species, while the unique d–s orbital recombination provides more electrons to improve its hydrogenation performance. The results of this study can aid in the development of copper-based materials as advanced catalysts, thereby improving fine chemical production and pollution treatment processes.
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TALANTA
·
2024
·
IF 5.6
Shuangying Li,Xiaozhong Gao,Linchun Nie,Lutong Bu,Guangyu Dong,Denghao Song,Wenjing Liu,Dejing Meng,Xiaodie Geng,Qingxiang Zhou
In this work, a sensitive fluorescent sensor toward p-nitrophenol (4-NP) integrating magnetic molecularly imprinted materials and carbon dots (CDs) was proposed. Magnetic material and CDs derived from K 3 [Fe(CN) 6 ] and glucose were simultaneously obtained through simple one-step hydrothermal process. Introducing of molecularly imprinted materials based magnetic solid phase extraction (MSPE) endowed the constructed fluorescent sensor with higher sensitivity and selectivity. The significant factors affecting the sensitivity of the sensor toward 4-NP were optimized. Good linearity was obtained between fluorescent intensity of CDs and different concentration of 4-NP from 0.08 to 62.5 μg L −1 . The sensitivity of constructed sensor was very low with detection limit of 0.02 μg L −1 . Reliable applicability was also proved by the well-pleasing recoveries of 94.2–97.8% with different spiked concentrations of 4-NP in real environmental waters.
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