Polymers
·
2019
·Vol. 11
·期 8
·1281
·
IF 3.164
Mingjing Shan,Chang Liu,Lei Shi,Lei Zhang,Yuan Lin,Shuo Zhang,Zhenjun Zhu,Xiaoyin Wang,Xupin Zhuang
Antibacterial viscose cellulose sponges (VCSs) were fabricated by heating cellulose xanthogenate (viscose) containing HAuCl4·nH2O. Viscose was used as the reducing agent and stabilizer for the in situ synthesis of Au nanoparticles (AuNPs) onto the VCSs. The morphology, structures, thermal properties, mechanical performance, and antibacterial activities of the sponges were investigated. Results indicate that AuNPs were uniformly immobilized in the VCSs, and the resulting complexes (AuNPs@VCSs) showed enhanced thermal stability and mechanical properties. Additionally, the AuNPs@VCSs exhibited remarkable antibacterial activities, with zone of inhibition diameter of 35.7 and 37.1 mm forStaphylococcus aureusandEscherichia coli, respectively. The process is simple and applicable at the industrial level and can be applied to the fields of cleaning and sanitation.
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Journal of Physical Chemistry C
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2026
·
IF 3.4
Jing-Jing Li,Can-Jun Zou,Wei Tang,Cheng-Yu Zhang,Jian-Hua Jia,Ping-Ping Fang
The detection of purine drugs has been a persistent concern among scientists in the biology and medicine fields over the past few decades. However, achieving both high sensitivity and selectivity in the detection of purine drugs sharing similar molecular structures remains a significant challenge. Herein, we achieve both high detection sensitivity and selectivity for purine drugs with similar structure on the Gold/Materials of Institut Lavoisier-101(Au/MIL-101) composite by surface-enhanced Raman scattering (SERS). In water solution, the detection sensitivity for adenine (Ade) is as low as 1 ng·mL–1. Importantly, in serum containing Ade, 6-mercaptopurine, and allopurinol, Ade can be selectively detected with a detection limit of 3 ng·mL–1, indicating excellent anti-interference capability and practical application potential. Such high detection sensitivity is attributed to the specific adsorption between the amino group of the Ade and the carboxyl groups of the Materials Institut Lavoisier-101(Cr) (MIL-101(Cr)). This work provides a strategy for detecting structurally similar drugs and illustrates the potential use of functionalized SERS substrates in pharmaceutical analysis and therapeutic drug monitoring.
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IEEE SENSORS JOURNAL
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2026
·
IF 4.5
Mingxuan Zheng,Pengxiang Chang,Ailing Zhang,Fei Liu,Honggang Pan,Junfeng Wang,Jingcheng Wang,Tengfei Yang,Yongning Zhang
At present, optical fiber surface plasmon resonance (SPR) biosensing technology faces two significant challenges, enhancing the detection performance and expanding the detected target types. To address this, this paper proposes a novel optical fiber SPR biosensor, modified with programmable polypeptide nanofibers (PNs) and polydopamine nanospheres covered gold nanoparticles (Au@PDA NPs). Peptide sequences have been applied in optical fiber SPR sensing due to their editable, self-assembling, and low-toxicity properties. In reported sensors, peptide sequences are engineered to self-assemble into peptide nanofibers, increasing the sensor’s specific surface area and providing customizable active sites. Au@PDA NPs further enhance the refractive index sensitivity and surface activity of the sensor. In this study, an SPR biosensor was employed to detect rabbit IgG. The results demonstrate a biological sensitivity of 0.0262 nm/(ng/mL) and a detection limit of 3.85 ng/mL. Compared to SPR sensors modified with single nanoparticles, the proposed sensor exhibits significant improvements in both sensitivity and detection limit. In addition to performance enhancement, this work also offers a systematic approach to improving the performance of sensors for different targets. By programming peptide sequences, various detectable substances can be detected. The method is cost-effective and highly efficient, which holds great significance for improving the commercial value of optical fiber SPR sensors.
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Chem Catalysis
·
2026
·
IF 10.7
Yunshuo Wu,Xiaole Weng,Haiqiang Wang,Zhongbiao Wu
CO 2 -assisted oxidative dehydrogenation of propane (CO 2 -ODHP) is a promising route for propylene production and CO 2 utilization, but catalyst sintering under harsh reaction and coke-burning conditions limits industrial deployment. Here, we report a practical regeneration strategy in which non-thermal H 2 plasma rapidly restores Au/MoS 2 catalysts that were deactivated by sintering at 600°C. The plasma treatment regioselectively reconstructs supported Au nanoparticles into raft-like Au domains enriched in unsaturated Au δ+ sites and stabilized by strong Au−S interactions, and this effect results in a 6.3-fold increase in propylene yield. The regenerated catalyst shows industrially relevant propylene productivity, high operational stability, and repeated regenerability. Mechanistic studies indicate that the Au rafts, electronically promoted by subsurface sulfur, facilitate propane C−H activation while accelerating hydrogen spillover and propylene desorption. These findings establish plasma-driven catalyst reconstruction as an effective regeneration strategy for light-alkane dehydrogenation and sustainable olefin production.
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Nature Communications
·
2026
·
IF 18.1
Wang Zixu,Zhang Binbin,Ding Jinyu,Tao Yunlong,Sun Lichao,Zhang Qingfeng
Spin selection in chiral nanocatalysts enabled by the chiral-induced spin polarization (CISS) effect has emerged as a promising strategy for boosting the performance of the oxygen reduction reaction (ORR). However, achieving atomic-scale control of catalytically active surfaces on chiral nanostructures remains challenging. Herein, we demonstrate an approach for the atomic-level engineering of Pt shells on chiral substrates to enhance ORR performance. Pt shells with controlled thicknesses are deposited on chiral Au nanoparticles through a combined protocol of cyclic underpotential deposition and galvanic replacement reaction. This strategy not only maximizes the atomic utilization efficiency of Pt but also preserves the chiral geometry of the substrate and its chiroptical activity. For the chiral Au@Pt nanocatalysts, a volcano-type relationship is observed between the Pt shell thickness and ORR performance. The chiral Au@Pt nanoparticles exhibit a capability of spin polarization due to the CISS-like effect and competitive ORR activities. This work establishes a route for fabricating catalytically active chiral nanocatalysts with CISS-like effects, thereby laying a foundation for the development of advanced spin-selective electrocatalysts.
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Catalysis Science & Technology
·
2025
·Vol. 15
·期 15
·4515-4527
·
IF 4.2
Huawei Xie,Bei-Bei Zhang,Fang-Xing Xiao
Antimony sulfide (Sb2S3) has been deemed a promising semiconductor for solar energy conversion owing to its suitable energy level position. However, so far, Sb2S3-based photocatalytic systems have been poorly reported, making Sb2S3-dominated photocatalytic mechanisms elusive. Herein, an efficient electrostatic self-assembly strategy was developed to fabricate metal nanocrystal (NC)-functionalized Sb2S3 nanorod (Sb2S3 NRs-M, M = Au, Ag, Pd) heterostructures. The tartaric acid (TA) molecules grafted on the Sb2S3 NR surface served as coordination sites, which enabled the self-assembly of the metal precursor on the Sb2S3 NR surface via electrostatic and coordinate interactions. The as-prepared Sb2S3 NRs-M (M = Au, Ag, Pd) heterostructures demonstrated significantly enhanced photoactivities toward the mineralization of organic pollutants under visible light irradiation, surpassing those of the pristine Sb2S3 NR counterpart. The contributing role of metal NCs as “electron reservoirs” in boosting the charge separation was determined. Furthermore, active species participating in the photocatalytic reaction were determined, and the photocatalytic mechanism was unveiled. This study offers an efficacious strategy for the rational construction of metal NC-functionalized Sb2S3 NRs for widespread photocatalytic applications.
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Plasmonics
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2025
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IF 4.3
Guo Jingtong,Ma Xiaodi,Song Wenjing,Yu Long
This study develops a novel, eco-friendly Surface Enhanced Raman Scattering (SERS) substrate, PDA-MMT/Au@Ag NPs, for ultrasensitive thiram (TRM) detection and pesticide screening. The substrate integrates polydopamine-functionalized montmorillonite (PDA-MMT) with Au@Ag core–shell nanoparticles synthesized via solvent-free photoreduction. MMT enriches analytes and prevents nanoparticle aggregation, while Au@Ag NPs generate high-density plasmonic hotspots. This dual synergy enables exceptional performance: a TRM detection limit of 1.34 × 10⁻⁹ M in solution (far below the FDA limit), with high uniformity (RSD = 9.54%) and stability (> 28 days). The substrate also demonstrates versatility for dyes (R6G, CV, NBA) and other pesticides. Optimization confirmed 30 min UV irradiation and a 1:10 MMT-to-Au@Ag volume ratio as ideal parameters. Characterization by TEM, XRD, XPS, and UV–vis validated the successful synthesis and core–shell structure. Compared to existing SERS platforms, this substrate offers superior sensitivity, reduced noble metal usage, and simpler, chemical-reductant-free fabrication, making it promising for on-site food safety and environmental monitoring.
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Materials Today Chemistry
·
2025
·
IF 6.7
Cijun Shuai,Jiang Xiao,Kangdong Wang,Gao Pan,Shuping Peng,Qi Zhong
Diabetic patients frequently suffer from skin ulcers exacerbated by bacterial infections. Cu 2 O nanozymes present a promising antibacterial alternative to antibiotics due to their enzyme-like catalytic activity. However, their efficacy is hindered by the low H 2 O 2 concentration in the bacterial microenvironment and the slow electron transfer during catalysis. To mitigate these limitations, we exploited Cu 2 O's intrinsic reducing ability to grow Au–Pt nanoparticles, thereby creating Cu 2 O@Au–Pt nanoreactors. Subsequently, we fabricated Cu 2 O@Au–Pt/Polycaprolactone skin scaffolds using laser powder bed fusion. In the scaffold, Cu 2 O catalyzed H 2 O 2 to produce hydroxyl radicals, inducing bacterial apoptosis. Au–Pt nanoparticles enhanced this catalysis in three manners: by providing additional H 2 O 2 through glucose oxidation, elevating the reaction temperature via plasmonic resonance, and facilitating electron transfer through metal-support interactions. Photothermal experiments and simulations illuminated the near-field coupling and interface hotspot formation mechanisms in the Cu 2 O@Au–Pt hybrid structure, boosting the catalytic rate at the interface. DFT calculations and electrochemical tests verified a reduced energy barrier for electron transfer in the Cu 2 O@Au–Pt system, enhancing its redox capability. Upon NIR irradiation, the scaffold increased intracellular ROS by 84.5 % and achieved a 99.9 % antibacterial efficacy against E. coli. These findings highlight the potential of the Cu 2 O@Au–Pt nanozyme scaffold for treating diabetic wounds.
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RSC Advances
·
2020
·Vol. 10
·期 55
·33119-33128
·
IF 3.119
Lulu Yang,Zhibin Yan,Lu Yang,Jianxin Yang,Mingliang Jin,Xiaobo Xing,Guofu Zhou,Lingling Shui
Photothermal effects in SiO2@Au core–shell nanoparticles have demonstrated great potential in various applications for drug delivery, thermo-photovoltaics and photothermal cancer therapy, etc. However, the photothermal conversion of SiO2@Au nanoparticles partially covered by disconnected gold clusters has rarely been investigated systematically. Here, we control the surface morphology of gold clusters on the photothermal conversion performance of SiO2@Au core–shell nanoparticles by means of chemically adjusting the synthesis parameters, including amounts of gold salts, pH value and reducing agent. The macroscopic variations of the photothermal heating of different nanoparticle dispersions are significantly influenced by the nanoscale differences of gold cluster morphologies on the silica core. The temperature rise can be enhanced by the strong near-field coupling and collective heating among gold clusters with a relatively uniform distribution on the silica core. A numerical model of the simplified photothermal system is formulated to interpret the physical mechanism of the experimental observation, and shows a similar trend of temperature rise implying a reasonably good agreement with experimental data. Our work opens new possibilities for manipulating the light-to-heat conversion performance of SiO2@Au core–shell nanoparticles and potential applications of heat delivery with spatial resolution on the nanoscale.
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RSC Advances
·
2015
·Vol. 5
·期 128
·105747-105752
·
IF 3.84
Yuanyuan Zheng,Xiaoming Zhang,Yi Yao,Xiaohong Chen,Qihua Yang
Ultra-small Au nanoparticles (<2 nm) supported on hollow silica nanospheres were successfully fabricated with the aid of chemical modification (–SH groups) or through simple immersion method, leading to supported catalysts Au/SH-HNS and Au/HNS. The resulting solid catalysts showed good thermal stability and the small particle sizes could be remained even at high temperature of 350 °C. Such catalysts were catalytically active in the oxidation of styrene using O2 as oxidant under 1 atm pressure. The catalytic results showed that the activity strongly depends on the Au loading amount, and the loading of 4–5 wt% led to the highest activity. Significant rate enhancement was observed with gold nanoparticles supported on pure silica in comparison with thiol modified silica nanospheres, suggesting the negative effects of thiol groups. The solid catalyst could be reused at least 8 reaction cycles without significant decrease in activity and selectivity. This study not only supplies an active, recoverable catalyst for the green transformation of styrene, but also demonstrates that the hollow silica nanosphere material has a superior ability in stabilizing metal nanoparticles against growth.
研究领域:
纳米催化
·
材料化学
·
绿色化学
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有机氧化反应
·
多相催化
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9
Jiangyuan Qiu,Ruxin Liu,Tao Yu,Wenxuan Li,Lingyuan Wu,Weiming Zhong,Ting Wan,Rui Guo,Zaiyin Huang,Xuanwen Liu
This study addresses the technical challenges of traditional processes for precious metal recovery from electronic waste, including high energy consumption, severe pollution, and the use of highly corrosive reagents. We innovatively propose a green recovery strategy based on piezoelectric catalysis. By combining the compositional characteristics of electronic waste (Cu > 80 wt%, Au 0.1–0.5 wt%) with the hard-soft acid-base (HSAB) theory, we developed a BOC-NH₄Cl-CH₃CN-H₂O catalytic system. This system achieves efficient dissolution of copper and gold (1334 mg h −1 ·g-cat −1 and 2.7 mg h −1 ·g-cat −1 , respectively) through an oxidation-coordination mechanism, with dissolution rates reaching 99.8% and 95.5% in simulated systems and enrichment purity exceeding 99%. Based on the experimental data, it is proposed that under piezocatalysis, acetonitrile is oxidized to acetamide, which then synergistically coordinates with NH₃/Cl − to form stable coordination products (with binding energies of E_Cu = −4.034 eV and E_Au = −2.993 eV, respectively). This process may serve as a key mechanism responsible for the significant enhancement of metal dissolution. Due to the lower oxidation potential of Cu ( E° = 0.34 V) compared to Au ( E° = 1.5 V), the system exhibits a “high‑copper, low-gold” selective dissolution characteristic that aligns well with waste composition. This technology provides an efficient and environmentally friendly solution for metal recovery from electronic waste.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 11
·e70415
·
IF 0
Yumin Leng,Muhua Lu,Mengyang Zhang,Anyi Wang,YuChen Dong,Jinbing Cheng,Yebin Guan
Heavy metal ions pose a significant threat to the environment and human health. Developing a highly sensitive heavy metal ion detection method is desirable. In this study, the Au(I)-catenates were formed in glucoamylase (Glu) and neomycin sulfate (Ne). The polychrome metal nanoparticles (MNPs) were prepared based on the template of Au(I)-catenates. The simple and ultrasensitive visual sensor array for the determination of heavy metal ions was established based on the color information extracted from polychrome MNPs. The addition of heavy metal ions shuttled among Au(I)-catenates in the strong alkaline solution. Through the use of the microwave heating method, the spherical and cubic MNPs of various sizes and colors were synthesized. To fully utilize the polychrome MNPs, a visual sensor was constructed for the detection and discrimination of eight heavy metal ions. The fingerprint-like color response signals correspond to each heavy metal ion and can be distinguished using computer software. The detection limit (0.1 nM) of heavy metal ions discriminated by the sensor is significantly lower than the data reported. The validation of the sensor was carried out by quantitative detection of Hg 2+ compared with its content in a certified reference material. This array method shows high sensitivity, good anti-interference, and potential in complex media.
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危险品化学品经营许可证（带存储）