Materials
·
2021
·Vol. 14
·期 22
·6901
·
IF 3.623
Yanru Ren,Xiaoyan Qin,Mike Barbeck,Yi Hou,Haijun Xu,Luo Liu,Chaoyong Liu
Infection-related titanium implant failure rates remain exceedingly high in the clinic. Functional surface coating represents a very promising strategy to improve the antibacterial and bioactive properties of titanium alloy implants. Here, we describe a novel bioactive surface coating that consists of a mussel-inspired carboxymethyl chitosan hydrogel loaded with silver nanoparticles (AgNPs) to enhance the bioactive properties of the titanium alloy. The preparation of hydrogel is based on gallic acid grafted carboxymethyl chitosan (CMCS-GA) catalyzed by DMTMM (4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride). To build a firm bonding between the hydrogel and titanium alloy plate, a polydopamine layer was introduced onto the surface of the titanium alloy. With HRP/H2O2catalysis, CMCS-GA can simply form a firm gel layer on the titanium alloy plate through the catechol groups. The surface properties of titanium alloy were characterized by scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and water contact angle. Silver nanoparticles were loaded into the gel layer by in situ reduction to enhance the antibacterial properties. In vitro antibacterial and cell viability experiments showed that the AgNPs-loaded Ti-gel possesses excellent antibacterial properties and did not affect the proliferation of rabbit mesenchymal stem cells (MSCs).Keywords:carboxymethyl chitosan;gallic acid;titanium alloy;DMTMM;HRP/H2O2;catechol group;hydrogel coating;antibacterial
研究领域:
材料科学
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生物材料
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生物医学工程
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yang Yang,Yijin Shu,Yinqiong Wu,Qingsheng Gao
Noble-metal nanostructures are promising for biosensing applications owing to their fantastic physicochemical properties, but the rational design of their easy-accessible and reactive surface is still challenging. This work is devoted to the interfacial engineering of Ag-Pd alloys, including tuning alloy composition and geometric structure, to promote the electrochemical biosensing performance. Through a co-tuning tactic with controlled reduction, channel-rich Ag 1 Pd 3 alloys with optimal electronic configurations and accessible active surface are successfully obtained, which afford high sensitivity, outstanding selectivity and excellent repeatability to detect H 2 O 2 and glucose biomarkers. As experimentally and theoretically evidenced, tailoring the composition of Ag-Pd alloys ameliorates electronic configurations due to ligand effects, which can optimize the binding with the key intermediate of OH*, and thereby boost electrochemical kinetic steps on surface. Meanwhile, tuning geometric structure with abundant channels enables fast transport of analytes toward largely-exposed active sites. Providing an atomic-level interpretation of structure-dependent biosensing, this work is anticipated to offer guidelines for the development of efficient sensing platforms.
研究领域:
材料科学
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分析化学
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生物传感器
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产品关联
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2025
·
IF 4.5
Cheng Huang,Haowen Liu,Bao Jiang,Guoli Li,Xinlu Qin,Yinan Hua,Yongming Deng,Yicheng Wang,Lin Zhou
Acute kidney injury (AKI), a critical clinical syndrome marked by high incidence and mortality, is currently diagnosed mainly by serum creatinine (SCr) and blood urea nitrogen (BUN), which have high miss rates. This study innovatively proposes using urinary hydrogen peroxide (H 2 O 2 ) concentration changes, caused by renal oxidative stress in AKI, as a new indicator for AKI risk assessment and treatment monitoring. Results from in vitro and AKI animal models show this indicator can quickly monitor AKI onset and drug effects in mice via electrochemical sensing technology based on Bi 2 S 3 @Cu 0.1 , offering a novel approach for AKI diagnosis and rehabilitation monitoring.
研究领域:
生物医学工程
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肾脏病学
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电化学
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即时检测
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生物传感器
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产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2025
·
IF 14.1
Xiaolin Sun,Pengfei Tian,Jinye Li,Minghui Zhu,Jing Xu,Fu-Zhen Xuan
While promising for photocatalytic hydrogen peroxide (H 2 O 2 ) production, the performance of graphitic carbon nitride (g-C 3 N 4 ) is curtailed by a central synthesis paradox: the mutually exclusive conditions required to simultaneously create its most effective dual active sites—nitrogen vacancies and cyano groups. Herein, this paradox is resolved with a molecular assembly-molten salt coupling strategy, a precise bottom-up approach enabling the one-step, synergistic creation of K-doped g-C 3 N 4 with both defect types. This photocatalyst achieves an exceptional H 2 O 2 production activity of 2.65 mmol·g −1 ·h −1 , which is 6.2 and 3.0 times higher than that of pristine and physically-ground K-doped g-C 3 N 4 , respectively. Characterization and theoretical calculations reveal that molecular assembly promotes K + interlayer embedding to facilitate charge migration, while the dual defects exhibit functional complementarity: nitrogen vacancies enhance O 2 adsorption, and cyano groups facilitate proton coupling. In situ analysis also confirms an easier O 2 activation effect and a lowered energy barrier for * OOH formation, ensuring high selectivity via a two-step, single-electron pathway. This study not only offers a route to rationally engineer dual-defect sites in carbon nitride but also provides a generalizable strategy for designing other advanced photocatalysts.
研究领域:
材料科学
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光催化
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能源化学
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纳米材料
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可持续能源
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Shufan Feng,Yan-Ping Zhang,Huihui Xu,Xue-qing Gong,Jianli Hua
Developing environmental-friendly photocatalysts with efficient photocatalytic activity is a promising way to tackle energy and environment issues. In this paper, perylene diimide (PDI) and its four derivatives ( SF-HPDI , N-HPDI , S-HPDI, and Se-HPDI ) with variable substituents at the bay position were synthesized and further used to construct the heterojunctions with g-C 3 N 4 for photocatalytic H 2 O 2 evolution. Among them, Se-HPDI /g-C 3 N 4 heterojunction achieves the highest H 2 O 2 production rate of 224.27 μM h –1 under visible light, which is 10.1 times higher than that of bare g-C 3 N 4 . The enhancement is because introducing substituents at the bay position increases the disparity of electron distribution between different constituent layers in heterojunctions, which is conducive to improving the interfacial electric field. Also, the load of PDIs broadens the optical absorption range of g-C 3 N 4 and suppresses H 2 O 2 decomposition. This work may inspire the further design of PDI-based photocatalysts.
研究领域:
材料科学
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环境科学
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光化学
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催化
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 35
·29404-29414
·
IF 9.5
Seohyeon Kim,Sujin Lee,Minsu Gu
Designing efficient, metal-free photocatalysts for selective hydrogen peroxide (H2O2) production via the two-electron oxygen reduction reaction (2e− ORR) is crucial for sustainable chemical processes. Herein, we report a carbon dots–polydopamine (CD/PDA) heterojunction system that exhibits outstanding photocatalytic performance by leveraging the surface functional duality of the organic components. The CD/PDA8 composite demonstrates the highest H2O2 production rate of 1408 μmol g−1 h−1 under visible light irradiation, significantly outperforming pristine CD and PDA. Mott–Schottky and optical analyses confirm the formation of a type-II heterojunction, which enables efficient charge separation. In this architecture, CD serves as the primary electron-accepting active sites for O2 reduction, while PDA—rich in surface catechol and hydroxyl groups—facilitates hole scavenging without requiring external electron donors as well as active sites. This dual-functionality not only suppresses electron–hole recombination but also minimizes side reactions, enhancing the selectivity and stability of the H2O2 generation process. Moreover, the catalyst exhibits excellent photocatalytic performance, recyclability and structural integrity over multiple cycles. These findings highlight the potential of surface-functionalized, all-organic heterojunctions as highly selective and sustainable photocatalysts for green chemical applications.
研究领域:
材料科学
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光催化
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可持续化学
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纳米技术
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能量转换
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产品关联
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2021
·
IF 6.291
Yimin Zhang,Jingkun Lou,Leliang Wu,Minghua Nie,Caixia Yan,Mingjun Ding,Peng Wang,Hua Zhang
Homogeneous Cu 2+ -mediated activation of H 2 O 2 has been widely applied for the removal of organic contaminants, but fairly high dosage of Cu 2+ is generally required and may cause secondary pollution. In the present study, minute Cu 2+ (2.5 μM) catalyzed H 2 O 2 exhibited excellent efficiency in degradation of organic pollutants with the assistant of naturally occurring level HCO 3 − (1 mM). In a typical case, acetaminophen (ACE) was completely eliminated within 10 min which followed the pseudo-first-order kinetics. Singlet oxygen and superoxide radical rather than traditionally identified hydroxyl radical were the predominant reactive oxygen species (ROS) responsible for ACE degradation. Meanwhile, Cu 3+ was deduced through Cu + and p -hydroxybenzoic acid formation analysis. CuCO 3 (aq) was the main complex with high reactivity for the activation of H 2 O 2 to form ROS and Cu 3+ . The removal efficiency of ACE depended on the operating parameters, such as Cu 2+ , HCO 3 − and H 2 O 2 dosage, solution initial pH. The presence of Cl − , HPO 4 2− , humic acid were found to retard ACE removal while other anions such as SO 4 2− and NO 3 − had no obvious effect. ACE exhibited lower degradation efficiency in real water matrices than that in ultra-pure water. Nevertheless, 58–100% of ACE was removed from domestic wastewater, lake water and tap water within 60 min. Moreover, eight intermediate products were identified and the possible degradation pathways of ACE were proposed. Additionally, other typical organic pollutants including bisphenol A, norfloxacin, lomefloxacin hydrochloride and sulfadiazine, exhibited great removal efficiency in the Cu 2+ /H 2 O 2 /HCO 3 − system.
研究领域:
环境科学
·
化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Liwei Chen,Tianming Cai,Chuan Cheng,Zhuang Xiong,Dahu Ding
Acetamiprid (ACE) was degraded by using ultraviolet (UV) irradiation and UV based advanced oxidation processes (AOPs) including UV/hydrogen peroxide (UV/H 2 O 2 ) and UV/potassium persulfate (UV/PS). Among them, UV/PS process exhibited the best performance for the elimination of ACE and reduction of total organic carbon (TOC). The degradation kinetics was comprehensively compared in terms of dose of oxidants, solution pH, and water matrix species. A linear relationship was tentatively developed between the [Oxidant]/[ACE] ratio and the pseudo-first-order kinetic rate constant ( k ). The degradation was significantly inhibited at basic conditions no matter for UV/H 2 O 2 process or UV/PS process. The effects induced by the water matrix species including inorganic anions and natural organic matter (NOM) were also non-negligible. For UV/PS process, both SO 4 − and HO contributed to the ACE degradation, whereas only HO participated in the degradation in the UV/H 2 O 2 process. The corresponding second-order rate constants of ACE with HO and SO 4 − were determined to be 7.59 × 10 8 and 3.68 × 10 8 M −1 s −1 , respectively. Due to the different active radical species, different degradation products were detected through the HPLC-MS analysis. This work would be meaningful for the remediation of ACE from water by AOPs.
研究领域:
环境科学
·
化学
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DOI
高影响因子
Environmental Technology & Innovation
·
2026
·
IF 7.1
Yunji Wang,Lin An,Liji Chen,Kaiqing Fan,Jidong Ying,Chuxia Lin,Junhao Qin,Rongliang Qiu
Mitigating arsenic (As) accumulation in rice while maintaining yield is a critical challenge for food safety. This study demonstrates that in-situ reactive oxygen species (ROS) generation, driven by hydrogen peroxide (H 2 O 2 ) from natural rain and anthropogenic source (urea hydrogen peroxide, UHP), effectively addresses this challenge. A pot experiment revealed that both H 2 O 2 sources, especially UHP, significantly induced in-situ production of ROS levels (H 2 O 2 and hydroxyl radicals (•OH). The ROS burst effectively suppressed the mobility of As by oxidizing 57–83 % of the mobile As(III) to the less bioavailable As(V) in soil porewater during the heading stage, thereby significantly reduced As accumulation in both aboveground and belowground tissues by 15.3–34.7 %. Critically, total As concentration in rice grains was markedly decreased by 17.7–30.1 % under both H 2 O 2 sources, with UHP being more effective than rain, and showed significant negative correlations with both H 2 O 2 and •OH levels. Simultaneously, rice yield was significantly improved, showing the greatest enhancement under UHP amendment, and demonstrating a strong positive correlation with ROS levels. These findings confirm that H 2 O 2 -driven ROS generation, particularly from UHP amendment, provides a promising in-situ strategy for the dual goals of reducing grain As accumulation and enhancing yield in As-contaminated paddy fields.
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DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2017
·Vol. 75
·期 12
·2935-2951
·
IF 1.197
Peng Mingguo,Li Huajie,Kang Xu,Du Erdeng,Li Dongdong
The removal of ibuprofen (IBP) in aqueous solution using UV/H 2 O 2 process was evaluated. The response surface methodology (RSM) and Box–Behnken design were employed to investigate the effects of process parameters on IBP removal, including the initial IBP concentration, H 2 O 2 dosage, UV light intensity, and initial pH value of solution. The RSM model developed herein fits well with the experiments, and provides a good insight into the OH radical irritated degradation mechanisms and kinetics. High resolution accurate mass spectrometry coupled with liquid chromatography was used to identify the degradation intermediates. A total of 23 degradation products were identified, including mono-hydroxylated products and dihydroxylated products. A series of OH radical-initiated reactions, including hydroxylation, dihydroxylation, decarboxylation, demethylation, ring break, lead to the final mineralization of IBP to CO 2 and H 2 O. UV/H 2 O 2 technology could be a promising technology for IBP removal in aqueous solution.
研究领域:
环境化学
·
水处理技术
·
药物降解
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环境污染物治理
·
高级氧化技术
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Qin Hu,Xuefeng Zou,Shengtao Zhang,Jiangyu Hao,Youcun Bai,Wenpo Li
It is widely accepted that the property of material is closely related to their morphology, phase, and composition. Nickel sulfides (NSs) possess various phases and morphologies, which enriches their electrochemical performance, but the difficulty in controlled synthesis of NSs poses a huge challenge for optimizing their property. Especially, it is extremely challenging to effectively control the phase and composition without changing the morphology. Herein, we for the first time demonstrate a facile one-step H 2 O 2 -induced method to controllably tune the phase and composition of NSs. We found that changing the amount of H 2 O 2 in precursor can achieve the phase transformation from sulfur-deficient to sulfur-rich component, while the shape of obtained products would not be greatly changed. It is worth noting that this result would benefit us to study the phase-related properties independently. Also, the H 2 O 2 -induced tactic shows high “adaptability” for different sulfur sources, such as the conventional L-cysteine, glutathione, thiourea, and thioacetamide. When tested in KOH electrolyte, we found that the performance of NSs have no obvious relation with their phase and composition, but mainly correlate with morphology. Among which, the optimum TU-400 with polyhedron-like shows a highest specific capacity of 197.8 mAh g −1 at 1 A g −1 .
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Qiang Bi,Yilin Zhao,Bo Yang,Yue Du,Ying Xue,Kun Zhang,Juanqin Xue
The abuse of antibiotics has caused serious harm to the ecological environment and human health. Fenton-like advanced oxidation technology is a green and effective treatment means, but how to improve the Fenton reaction efficiency and wide pH adaptability is still a big challenge. Herein, we designed and developed a single-atom catalyst Cu 1 -CN with graphite-phase carbon nitride as the carrier by loading a low amount of metal Cu. The N atom anchors the copper atom in the form of a coordination bond, and the single atom Cu site has excellent performance in activating H 2 O 2 . Not only a short period of time (10 min) oxidation degradation of tetracycline (degradation rate 80 %), and in a broad range of pH (3.2 ∼ 9.5) still maintaining high removal performance (efficiency more than 70 %). Combined with X-ray absorption fine structure characterization and density functional theory (DFT) calculations, it is considered that isolated Cu atom and N atom cooperate to construct highly reactive Cu-N 4 active centre, which completes the task of H 2 O 2 activation. This study provides a new theoretical basis and technical support for the degradation of antibiotic pollutants by single-atom Fenton-like reaction.
研究领域:
环境科学
·
催化化学
·
高级氧化技术
·
材料化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）