Gels
·
2025
·Vol. 11
·期 12
·1007
·
IF 5.3
Mengting Fan,Beizhe Huang,Yuhan Li,Ting Zhang,Ranjith Kumar Kankala,Jianting Zhang
Protein-based hydrogels have emerged as an important class of materials for biomedical applications. However, these hydrogels often exhibit inferior mechanical properties, significantly limiting their potential applicability. Herein, a simplified yet efficient soaking method is developed to broaden the scope of constructing stiff and tough pure protein hydrogels, using natural cysteine-rich proteins, such as lactoferrin (LF). The preformed, soft and brittle, unfolded protein hydrogels transformed into highly stretchable and compressible elastomers after soaking in H2O2due to chain entanglement and self-crosslinking via interchain disulfide bonds. As a result, the H2O2-treated LF hydrogels exhibited an extraordinary ultimate strength (compressive and tensile strains of over 90% and 400%, respectively, and stresses of 20 and 1.5 MPa). In addition, these rubber-like hydrogels exhibited exceptional self-recovery and fatigue resistance capabilities. Furthermore, the relationship between protein structure and the mechanical properties of the hydrogel was investigated. Together, these revelations could serve as a guiding principle for advancing the design of biocompatible, tough protein hydrogels without chemical modification or mechanical reinforcing fillers.
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PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 23
·8383-8391
·
IF 6.1
Chen Zhang,Gao Xu,Qifeng Liang,Li Liang,Zebo Fang,Rong Wu,Shunhang Wei,Lei Wang,Xiaoxiang Xu
ZnIn2S4 nanosheets with tunable concentration of dual vacancies (i.e. Zn vacancy and S vacancy) were prepared and used for photocatalytic H2O2 production. Introducing dual vacancies effectively promotes exciton dissociation, facilitates O2 adsorption, and reduces the free energy of subsequent activation and protonation of adsorbed O2. These intriguing properties endow ZnIn2S4 with excellent performance for sacrificial agent-free H2O2 photosynthesis via a two-step single-electron oxygen reduction reaction pathway under AM 1.5 and visible-light irradiation. Almost double amounts of H2O2 can be produced over ZnIn2S4 with dual vacancies compared to pristine ZnIn2S4 without vacancies. Corresponding SCC efficiency and AQY at 420 ± 20 nm reached ∼0.031% and 0.34%, respectively. In addition, the abundant dual vacancies inhibit H2O2 decomposition because of enhanced hydrophilicity. This work provides a new strategy to improve the photocatalytic performance of ZnIn2S4 through defect engineering and brings new mechanistic insights into the role of these defects.
研究领域:
材料科学
·
环境科学
·
化学
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高影响因子
Matter
·
2025
·
IF 17.5
Yingnan Wang,Jinting Wu,Qian Zhang,Yingjun Tan,Jian Gao,Xiao-Dong Zhu,Yong-Chao Zhang,Shaojun Guo
Given the trade-off between activity and selectivity, typical pure CoSe 2 catalyst that excels in the initial proton-coupled electron transfer, however, usually underperforms in the subsequent reaction process, leading to low performance for acidic 2e − oxygen reduction reaction (ORR) to H 2 O 2 . Here, we report a class of Zn–Co pair active sites on the defected CoSe 2- x . The Zn–Co pair active site can well modulate electronic structure for enhancing the adsorption and activation of ∗O 2 to achieve high-selectivity electrosynthesis of H 2 O 2 . The surrounding Co site has the optimal Gibbs free energy for ∗OOH because of the d-p orbital hybridization between the near-end O (∗OOH) and Co near the Fermi level. The Zn 1 -Co/CoSe 2- x catalyst achieves high selectivity of 95% under 0 V against a reversible hydrogen electrode (RHE) and the maximum productivity of 2.26 mol g cat. −1 h −1 at 250 mA cm −2 , which is among the best non-noble metal-based compound catalysts in an acidic medium.
研究领域:
材料化学
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电化学
·
催化科学
·
能源化学
·
无机功能材料
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高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Yang Yu,Na Jiang,Yuanbo Zhou,Fei Huang,Yide He,Yongjun Zhang
Ofloxacin (OFX), commonly employed in the treatment of infectious diseases, is frequently detected in aquatic environments and poses potential ecological risks. UV/H 2 O 2 oxidation has been recognized as an efficient approach for removing antibiotics. In this study, Cu-doped waste-tire carbon was prepared and used as a UV/H 2 O 2 catalyst for the degradation of OFX. The results showed that the OFX removal was 89.3% within 90 min under the optimal reaction conditions. It was found that ZnO, used in the tire manufacturing to promote rubber vulcanization for enhanced stability and durability, played an important role in UV/H₂O₂ oxidation for OFX degradation. Toxicity experiments conducted with a microbial degradation respirometer demonstrated that the treated water exhibited low toxicity. This study introduces a sustainable catalyst derived from waste tires, and facilitating the development of metal-carbon catalysts for the effective removal of antibiotics from wastewater.
研究领域:
环境科学
·
生物学
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 26
·11794-11801
·
IF 2.7
Mingming Du,Anxian Peng,Hongyue Liu,Qiyun Li,Likai Dai,Zheng Fang,Ganning Zeng,Huimei Chen,Rongjun Yan
The photocatalytic conversion of endless solar energy into storable and usable chemical energy, such as photocatalytic hydrogen peroxide production, is promising and attractive. However, a satisfactory hydrogen peroxide yield has not been achieved using photocatalysts due to the rapid recombination of photoexcited carriers and the rapid decomposition of H2O2. Herein, a polymer polyethyleneimine (PEI)-assisted Pd metal loading BiOCl nanosheet photocatalyst (Pd/PEI/BOC) is designed to achieve higher photocatalytic activity. Experimental results show that compared to the Pd/BOC catalyst with a Pd loading of only 0.26 wt%, the Pd/PEI/BOC catalyst can achieve a higher Pd loading of 0.45 wt%, which is due to the obvious shifting of the isoelectric point (IEP) of BiOCl from the pH value of 4.1 to 8.4 in the presence of PEI, leading to enhanced immobilization. Furthermore, H2O2 decomposed more slowly for the Pd/BOC catalyst modified by PEI. In addition, Pd can significantly enhance the separation of electrons–holes and light absorption range, especially for visible light. Therefore, under simulated sunlight, this Pd/PEI/BOC catalyst displayed a higher H2O2 production ability of 3700.23 μmol g−1 h−1.
研究领域:
材料科学
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化学工程
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环境科学
·
纳米技术
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iScience
·
2024
·
IF 4.6
Zhaohui Wang,Zehan Sun,Kun Li,Keyi Fan,Tian Tian,Haomin Jiang,Honglei Jin,Ang Li,Yang Tang,Yanzhi Sun,Pingyu Wan,Yongmei Chen
Electrocatalytic generation of H 2 O 2 via the 2-electron pathway of oxygen reduction reaction (2e-ORR) is an attractive technology compared to the anthraquinone process due to convenience and environmental friendliness. However, catalysts with excellent selectivity and high activity for 2e-ORR are necessary for practical applications. Reported here is a catalyst comprising boron-doped porous carbon hollow spheres (B-PCHSs) prepared using the hard template method coupled with borate transesterification. In an alkali electrolyte, the selectivity of B-PCHS for 2e-ORR above 90% in range of 0.4–0.7 V RHE and an onset potential of 0.833 V was obtained. Meanwhile, the generation rate of H 2 O 2 reached 902.48 mmol h −1 g cat −1 at 0.4 V RHE under 59.13 mA cm −2 in batch electrolysis. The excellent catalytic selectivity of B-PCHS for 2e-ORR originates from the boron element, and the catalytic activity of B-PCHS for H 2 O 2 generation is contributed to the morphology of porous hollow spheres, which facilitates mass transfer processes.
研究领域:
材料科学
·
电化学
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Huagen Liang,Anhu Wang,Ruolin Cheng,Fu Chen,Palanisamy Kannan,Costas Molochas,Panagiotis Tsiakaras
The emerging photocatalytic production of hydrogen peroxide (H 2 O 2 ) using graphitic carbon nitride (g-C 3 N 4 ) has attracted a lot of attention for its potential applications in various fields. However, However, the catalytic activity of pure g-C 3 N 4 is still limited. Herein, Bi, K co-doped g-C 3 N 4 (Bi x K y -CN) was prepared by co-thermal polymerization of a mixture of potassium nitrate, bismuth nitrate, melamine, and urea. The obtained Bi 3.6 K 3 -CN composite possesses more negative conduction and valence band positions that can, to some extent, enhance photocatalytic performance by lowering the energy barrier of redox reactions and by enhancing electron absorption capacity. Additionally, the pyrolysis process of the potassium nitrate and bismuth nitrate has a considerable impact on the formation of the morphology of g-C 3 N 4 , generating a porous lamellar-structure with nitrogen defects, resulting in increased oxygen adsorption and utilization capacity. These synergistic effects enable Bi 3.6 K 3 -CN to exhibit excellent photocatalytic activity and cycling stability for H 2 O 2 production. After 3 hours of visible light irradiation, the production of H 2 O 2 catalyzed by Bi 3.6 K 3 -CN can reach 1207.72 μmol L -1 , which is 57 times higher than that of pure g-C 3 N 4 .
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2025
·
IF 5.6
Qiwei Liang,Xiancan Ban,Siyuan Jiang,Zhi Zeng,Huigang Feng,Yufeng Ye,Yi Zhang,Yan-Qing Guan,Yi Huang
Thrombotic diseases, such as stroke and myocardial infarction, represent significant threats to global health. Timely and safe thrombolysis is crucial in improving tissue ischemia and preventing thrombosis progression. Urokinase (UK) is a widely used thrombolytic agent, however, its clinical use is constrained by bleeding risks and other adverse effects. In this study, EGCG-Mn-Fuc nanoparticles with H 2 O 2 responsiveness were successfully prepared. Urokinase was loaded into the nanomaterials via the direct assembly method, and the thrombolytic effect of these nanoparticles was investigated. The preparation process of the nanoparticles is straightforward, and the reaction conditions are relatively mild. The physical and chemical properties of the EGCG-Mn-Fuc nanoparticles were characterized by means of dynamic light scattering (DLS), transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FTIR), Ultraviolet and visible spectrum (UV-Vis) and X-ray photoelectron spectroscopy (XPS). In cell experiments, EGCG-Mn-Fuc nanoparticles showed low cytotoxicity and good biocompatibility. Furthermore, these nanoparticles effectively scavenged DPPH free radicals, attributing this capability primarily to their antioxidant properties. In vitro thrombolytic experiments showed that EGCG-Mn-Fuc nanoparticles intelligently responded to H 2 O 2 , releasing the loaded urokinase and exerting a thrombolytic effect. The microcapsules exhibited concentration-dependent thrombolytic effects, effectively dissolving thrombi in the presence of H 2 O 2 . Hemolysis and coagulation tests confirmed their good blood compatibility and anticoagulant properties. In addition, it is worth noting that the nanoparticle contains fucoidan that mimics P-selectin glycoprotein ligand-1(PSGL-1) and has a high affinity for activating P-selectin on the surface of platelets. Overall, the results of this study not only provide valuable experimental evidence and theoretical support for the application of EGCG-Mn-Fuc nanoparticles in the field of thrombolysis, but also establish a foundation for the biomedical application of drug carriers in this field.
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高影响因子
Materials Today Energy
·
2026
·
IF 8.1
Deqiang Kong,Yong Yan,Xiaoxing Ke,Ge Chen
On-site electrochemical synthesis of hydrogen peroxide (H 2 O 2 ) for advanced oxidation processes is a promising technology, yet its practical application is hindered by poor performance at industrial-scale current densities (>500 mA cm −2 ). This limitation stems from severe mass transport bottlenecks for both oxygen and protons. Here, we report a strategy to overcome this dual challenge by designing a self-stratified porous catalyst layer (D-CL) using a volatile fluorinated additive. The additive's evaporation creates abundant macropores that enhance O 2 permeation, while residual -CF x fragments restructure the interfacial water network from rigid tetrahedrally coordinated water to flexible doubly hydrogen-bonded water configurations. This tailored interface weakens hydrogen bonding, facilitating rapid proton transport and mitigating local pH increases. This synergistic design enables a high H 2 O 2 Faradaic efficiency of ∼60% and a production rate of 8.0 mmol cm −2 h −1 at 0.8 A cm −2 , demonstrating a robust pathway for practical environmental remediation applications.
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高影响因子
Nature Communications
·
2026
·
IF 18.1
Lv Fanxun,Wei Shengwei,Wu Xiaoyan,Qi Chenghang,Wang Xuan,Liu Xiaoning,Yu Yi,Yang Bo,Xie Chenlu
Aqueous photocatalytic CH 4 oxidation offers a promising route for converting natural gas into oxygenates, a process governed by multi-electron and proton transfer at the catalyst-water interface. Here, we demonstrate that spatially confining water within Au/TiO 2 @pSiO 2 core-shell catalysts—by reducing silica pore size to 1.7 nm—increases CH 4 conversion three-fold and H 2 O 2 production 22-fold compared to Au/TiO 2 . This strategy is generalizable to other semiconductors and cocatalysts, with Pt/TiO 2 @pSiO 2 -1.7 exhibiting oxygenate yields of 32.7 mmol g -1 h -1 and a 14.1% apparent quantum yield at 365 nm. Spectroscopic studies and molecular dynamics simulations reveal that water confined within pores, with a weakened hydrogen-bonding network, alters proton-coupled electron transfer pathways. Water oxidation transits to a concerted pathway, favoring •OH production for CH 4 conversion, while oxygen reduction shifts to a two-electron process, directly producing H 2 O 2 . This work highlights the potential of water confinement for designing efficient photocatalysts for CH 4 conversion.
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高影响因子
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
·
2020
·
IF 2.751
Yubo Sun,Xiangrong Tian,Hao Wu,Xinchang Hao,Baowei Gao,Hongyan Zhang,Juntao Feng,Lirong Han
Glycoprotein (GP)-1 is a glycoprotein elicitor with antiviral activity found in Streptomyces kanasensis zx01. GP-1 can induce programmed cell death (PCD) in vitro; however, the underlying mechanism is unclear. In the present study, we demonstrated that GP-1 induced PCD in tobacco suspension cells, which was modulated by hydrogen peroxide (H 2 O 2 ). GP-1 participated in and modulated biologically relevant signaling in plant cells. GP-1 induced tobacco cell death in a dose- and time-dependent manner; affected the expression of BRI1-associated receptor kinase 1 (BAK1) and the accumulation of salicylic acid (SA), which are related to PCD; and enzymatic activities and mitochondrial functions. In conclusion, GP-1-induced PCD in tobacco may be mediated by H 2 O 2 which alters BAK1 and SA levels, as well as mitochondrial and gene function. This cell signal cascade played an important role in the process of GP-1 induced plant disease resistance .
研究领域:
植物生理学
·
分子生物学
·
细胞信号传导
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PubMed
高影响因子
LUMINESCENCE
·
2020
·Vol. 36
·期 1
·79-84
·
IF 1.855
Jie Li,Yingzi Han,Xinyue Li,Liping Xiong,Lijun Wei,Xianglei Cheng
In this article, a simple, effective chemiluminescence (CL) method for the detection of methylparaben (MP) in cosmetic samples was developed based on an IO 4 − –H 2 O 2 –carbon nitrogen quantum dots (CNQDs) system without a separation process. The results indicated that the redox reaction between periodate and hydrogen peroxide released hydroxide radicals and superoxide radical anions in the presence of bicarbonate. These two radicals were responsible for the formation of excited luminophor CNQD* with a maximum wavelength at 480 nm. Due to the competitive reaction with hydroxide radicals, CL intensity was markedly diminished in the presence of MP. The relative standard deviation in the intraday assay was below 5.5% ( n = 9), and the detection limit was as low as 0.50 μmol/L. The proposed method allowed for the successful, selective determination of MP in cosmetics.
研究领域:
分析化学
·
化妆品科学
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高影响因子
危险品化学品经营许可证（带存储）