MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Yapeng Xiang,Jie He,Na Sun,Yuteng Fan,Liming Yang,Caihong Fang,Long Kuai
The atomically dispersed catalysts have aroused great attention in the recent decade. However, the preparation of atomically dispersed Au catalysts presents more challenge than other atomically dispersed catalysts such as Pt, Pd, etc. From the aspect of support, this work contributes a novel hollow mesoporous CeO 2 microspheres (CeO 2 -hm) for efficient dispersion of single Au atoms (Au 1 ). Contributed by the high specific surface area and mesoporous structure, CeO 2 -hm possesses much higher capacity for undertaking Au 1 , than commercial CeO 2 particles (CeO 2 -c). Typically, with Au loading of 0.2 at%, CeO 2 -hm supported Au (Au 1 /CeO 2 -hm) presents atomic dispersion while CeO 2 -c supported Au (Au/CeO 2 -c) contains large amount of Au nanoparticles . Confirmed by catalyzing the water-gas shift (WGS) reaction, the obtained Au 1 /CeO 2 catalysts exhibit notably higher performance than the Au-based catalysts supported by CeO 2 -c and CeO 2 synthesized through co-precipitation and sol-gel strategies. For example, 0.2 at% Au 1 /CeO 2 -hm exhibits 9.1 times reactivity of equal Au loaded Au/CeO 2 -c catalyst. Besides, the CeO 2 -hm supported single-atom Au catalyst presents good tolerance under long-time WGS running.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Liying Yu,Lingyu Zhang,Guojuan Ren,Shuang Li,Baoya Zhu,Fang Chai,Fengyu Qu,Chungang Wang,Zhongmin Su
In this article, we reported a dual emissive multicolorful fluorescent-nanoprobe which was composed of gold nanocluster (BSA-Au NCs) and carbon dots (CDs) with a certain proportion, i.e. Au NCs-CDs. The dual emissive Au NCs-CDs showed pink fluorescence under UV light, and the dual emission peaks at 625 nm and 444 nm were corresponded to the existence of Hg 2+ and Cr 6+ respectively. The fluorescence color transformed from pink to blue when in presence of Hg 2+ . The blue fluorescence emission of CDs selectively quenched by Cr 6+ , whereas the red fluorescence of BSA-Au NCs was stable against Cr 6+ , which can be treated as internal reference. The difference response of the two emissions to Hg 2+ and Cr 6+ resulted in a distinguished fluorescent color change, which can be noticed by the naked eyes clearly. When the Hg 2+ and Cr 6+ were exposed to the Au NCs-CDs simultaneously, the dual-emission of the Au NCs-CDs were all reduced and exhibited the complete quenching of the pink emission. The detection limits for Hg 2+ and Cr 6+ were 1.85 nM and 5.34 nM, respectively. Significantly, it was successfully applied to determine the existence of Hg 2+ and Cr 6+ in real samples, which offered the advantages of simplicity, environmentally friendly and cost saving efficiency.
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Yinjiang Leng,Jing Zhang,He Li,Yi Ma,HuiBo Luo,Danqun Huo,Changjun Hou
A cross-reactive Au NPs/AuAg NCs colorimetric sensor array was developed. • Seven sulfur-containing analytes were discriminated, and GSH was quantified. • Blind-test accuracies reached 93.8% for Baijiu and 97.6% for distilled liquors. • Sensor responses were associated with sensory differences among Baijiu samples. Sulfur-containing compounds are important aroma contributors in Baijiu because of their low odor thresholds and strong sensory effects. A cross-reactive colorimetric sensor array based on positively charged Au nanoparticles and negatively charged AuAg nanoclusters was developed for sulfur-containing analyte discrimination and Baijiu classification. Analyte-induced perturbation of the nanoparticle–nanocluster assemblies generated differential optical fingerprints across four sensing elements. Combined with pattern-recognition analysis, the array discriminated seven sulfur-containing analytes at different concentrations and quantified glutathione over 0.1–50 mM. It also classified 16 commercial Baijiu samples and distinguished Baijiu from five other distilled liquors and 50% ethanol. Blind-sample prediction accuracies reached 93.8% for the 16 Baijiu categories and 97.6% for the 21 distilled-liquor categories. Correlation analysis showed associations between selected sensing channels and Baijiu sensory attributes. The proposed array provides a rapid optical fingerprinting approach for Baijiu differentiation and authenticity-related screening.
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高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 7
·495
·
IF 5.4
Shi Jian,Shan Xiaomu,Wang Hongren,Xu Yuanze,Zhang Zezheng,Fan Xiuwei,Du Xuejian,Jiang Shouzhen
A high-performance optical fiber surface plasmon resonance (SPR) biosensor for the determination of dopamine (DP) is reported based on gold nanocone arrays combined with gold nanoparticles (AuNPs). The sensor was fabricated via thermal nanoimprinting, gold sputtering, and single-stranded DNA-assisted AuNPs immobilization to form gap hotspots. Finite element simulation and experimental results verified strong electromagnetic field enhancement via extraordinary optical transmission and SPR-LSPR coupling. The sensor achieved a detection limit of 2.7 × 10 -14 M for DA, with sensitivity and FOM improved by 37.4% and 54.2% relative to conventional gold film structures. It showed excellent selectivity and stability in serum, cerebrospinal fluid (CSF), and whole blood. This robust, scalable design provides a promising label-free platform for ultrasensitive DA detection in clinical point-of-care applications. Graphical abstract
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高影响因子
LANGMUIR
·
2026
·Vol. 42
·期 22
·15967-15977
·
IF 4.4
Zhang Li,Zhang Wenhao,Wang Zhaomeng,Fan Sining,Xia Puyue,Tang Shaolong
Porous gold materials, with advantages such as low relative
density
and high chemical stability, are widely used in biosensing, chemical
energy storage, etc. Currently, traditional methods still face challenges
in the preparation of ultrafine nanoporous gold microspheres, which
limit their application in advanced electronic packaging. In this
study, we propose a strategy for the controlled preparation of nanoporous
gold microspheres using low-gold-content alloy microspheres, which
includes wet chemical reduction, crystal diffusion and growth, liquid–solid
interfacial nonwetting effect, and chemical-free corrosion dealloying.
Nanoindentation results show that, compared to the brittle crushing
under deep pressing of polymer microspheres, the newly prepared nanoporous
gold microspheres exhibit significantly low-pressure-stable deep-press
anisotropic conductive properties. Specifically, the nanoporous gold
microspheres achieve up to 80% compression deformation under a load
of approximately 5 mN, primarily due to their unique nanoporous structure,
reducing hardness. In terms of piezoresistive performance, the nanoporous
gold microspheres maintain stable low-resistance conductive properties
during both loading and unloading processes, which is mainly attributed
to the large compression deformation enhancing the connection reliability
between substrates. When applied to anisotropic conductive film preparation
and device encapsulation testing, the results demonstrate that with
a powder loading of 5 wt %, the nanoporous gold microsphere-based
anisotropic conductive film exhibits a significantly wide pressure
encapsulation range (0.1–0.5 MPa), which is directly related
to the large compression deformation ability of the nanoporous gold
microspheres. This ability can not only reduce the requirement for
uniform particle size distribution and save sorting costs but also
effectively improve the conductivity of interconnected devices.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Huibin Zhang,Xiaoyun Qiao,Runwei Wang,Zongtao Zhang,Shilun Qiu
Amphiphilic nanoreactor enables efficient sulfide oxidation in water. • Perylene units suppress aggregation and improve charge separation. • Up to 97% conversion with high selectivity under visible light. • Au loading boosts charge separation and catalytic activity. • A green strategy for selective oxidation in aqueous systems. Perylene compounds have been widely investigated as organic optoelectronic materials owing to their extended conjugated structures. However, their photocatalytic activity is often limited by aggregation-induced charge recombination. Herein, we developed a novel amphiphilic photoactive nanoreactor, PTB-MSN, via the condensation of silylated 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) with 1,4-bis(triethoxysilyl)benzene (BTEB). The resulting nanoreactor effectively suppresses perylene aggregation and enables the selective oxidation of organic sulfides to sulfoxides in aqueous media, exhibiting approximately six-fold higher catalytic performance than the PTCDA monomer. The sulfide conversion showed a BTEB-dependent trend, increasing and then decreasing as the BTEB dosage varied from 0 to 0.6 mL, with 0.2 mL affording the optimal PTB-MSN catalyst. Moreover, Au nanoparticle deposition further enhanced the photocatalytic activity. This work provides a promising strategy for constructing perylene-based photocatalysts for visible-light-driven heterogeneous catalysis. A novel amphiphilic PTCDA-based periodic mesoporous organosilica nanoreactor enables efficient visible-light-driven oxidation of sulfides in water by integrating enhanced substrate adsorption, suppressed perylene aggregation, and promoted charge separation, thereby providing a promising platform for green and selective photocatalytic sulfoxide synthesis. Download: Download high-res image (102KB) Download: Download full-size image
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121778
·
IF 7.5
Jian-Bo Qu,Guo-Yu Yue,Jian-Ling Zhang,Yuan Yang,Dong Wang,Jia-Le An,Jing Li
The excellent catalytic performance of noble metal nanoparticles (NMNPs) is often hampered by their tendency to agglomerate and poor recyclability, which significantly limits their large-scale industrial use. To address these challenges, anchoring NMNPs onto porous supports has been proposed as an effective strategy, as it not only suppresses their migration and agglomeration but also enhances their catalytic stability and recyclability through strong metal–support interactions. In this study, novel poly (glycidyl methacrylate) @ZIF-8@Au (PGMA@ZIF-8@Au) composite microspheres were fabricated via three steps: gigaporous PGMA microspheres were first prepared via suspension polymerization, followed by the in-situ growth and subsequent etching of ZIF-8 on their surface, and finally, the confined loading of gold nanoparticles (AuNPs) with three different sizes. This designed structure effectively mitigates issues such as nanoparticle aggregation, detachment, and mass transfer limitations. The hierarchical pores of the PGMA microspheres provide a high specific surface area and abundant active sites, while the rich epoxy rings create an electron-rich environment that facilitates electron transfer to the AuNPs. Moreover, ZIF-8 improves the structural stability and biocompatibility of the composite microspheres and promotes the uniform dispersion of AuNPs. The resulting catalyst achieved 100 % degradation of p-nitrophenol (PNP) within 20 min and maintained a conversion of 84.8 % after ten consecutive cycles. Based on the synergistic effects between the composite and the AuNPs, a plausible catalytic mechanism was proposed. This work offers a promising strategy for designing highly efficient catalysts for environmental remediation.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2026
·
IF 4.1
Ding Zhengyuan,Zhu Linlian,Zhou Yaqiu,Li Mengwei,Yao Yi,Su Mengjie,Wu Zengqiang,Wang Li,Yu Chunmei
In this study, we presented the design and development of a flexible and non-enzymatic electrochemical sensor based on in situ growth of Au nanowires (AuNWs) on carbon cloth (CC) for the dynamic monitoring of uric acid levels in human sweat. The electrode was fabricated through a controllable process, resulting in a three-dimensional conductive network with high surface area and abundant electroactive sites on the electrode surface. Electrochemical analyses demonstrated that the electrode exhibits excellent sensitivity toward uric acid with a wide linear response range from 10 to 700 μM and a low detection limit of 1.4 μM. The electrode was further integrated into a wearable sensing platform and applied for real-time, non-invasive sweat sampling and monitoring during exercise. The results indicated that the sensor exhibited a high correlation between sweat and blood uric acid levels measured by a commercial device, validating its potential applicability for the daily monitoring of uric acid. This work provides a promising strategy for the development of facile and reliable wearable sensors, with significant potential in non-invasive healthcare monitoring. Graphical abstract
A flexible and wearable sensor by in situ growth of Au nanowires on carbon cloth was developed for the real-time and non-invasive monitoring of uric acid metabolite in sweat.
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高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2026
·Vol. 24
·期 1
·150
·
IF 12.6
Li Bei,Chen Zhengqiang,Sun Yong,Gou Maling,Luo Yuting,Zhang Wenli,Ye Xiwen,Zhao Yaqin,Feng Lei,You Zhen
The deep-seated locations and hypoxic microenvironments of tumors critically hinder conventional phototherapies. To overcome these limitations, we engineered a novel Au@Cu 2 − x Se nanoprobe via precise aspect ratio control of gold nanorods for NIR-II plasmonic resonance and site-specific growth of Cu 2 − x Se domains, resulting in the formation of a unique “lollipop” nanostructure. This design enables single-wavelength NIR-II laser-activated photothermal therapy and dynamic dual-modal therapy with intrinsic hypoxia tolerance: the nanoprobes achieve exceptional photothermal stability while simultaneously driving photothermally enhanced chemodynamic activity through accelerated Fenton-like catalytic cycles. Crucially, this strategy not only eradicates deep tumors but also activates systemic antitumor immunity. Combined with real-time photoacoustic imaging guidance, the platform establishes an oxygen-independent paradigm for treating hypoxic solid tumors. Graphical
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ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Xiaoqian Kuang,Jingyan Tang,Li Chen,Xiang Gao,Le Yu,Hongbao Li,Yunfeng Li,Renhui Gao,Zheng Guo,Weilin Chen,Xingjiu Huang
Electrolyte leakage from lithium-ion batteries constitutes a critical safety challenge as volatile and highly flammable organic carbonates can rapidly trigger fire and catastrophic thermal runaway. Diethyl carbonate (DEC), a widely used electrolyte solvent, is particularly hazardous, yet its selective detection under humid and chemically complex conditions remains highly challenging. Herein, an unconventional synthesis strategy is reported that departs fundamentally from traditional metal-ion precursors, employing a polyoxometalate molecular cluster (H4SiW12O40·xH2O, SiW12) as a structure-directing, molecular-level precursor to construct dendritic WO3 nanofibers uniformly decorated with Au nanoparticles (Au-D-WO3) for ultratrace DEC sensing. The POM-guided process directs the in situ formation of defect-rich, hierarchically porous WO3 dendrites, while the concurrent reduction of HAuCl4 generates ultrafine Au NPs anchored on WO3, creating abundant oxygen vacancies and well-defined Au/WO3 Schottky interfaces. Benefiting from synergistic structural hierarchy and interfacial electronic modulation, the sensor exhibits ultratrace sensitivity and high selectivity toward DEC, robust humidity tolerance, and long-term stability. Density functional theory calculations reveal a transition from electrostatic- to hybridization-dominated adsorption at the Au/WO3 interface, accounting for the enhanced and humidity-resilient sensing performance.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Xing Wang,Jian Zhao,Xuening Duan,Yujie Ma,Yong Liu,Yu Xia,Yuhua Feng
To synthesize hybrid nanostructures, precise structural control holds promise to modulate their physicochemical properties. Interestingly, due to the close physico-chemical nature and Galvanic Replacement (GR) between Au ions and Ag, the fabrication of Ag-Au Janus-like structures by growing Au on Ag free of GR is challenging. In this work, in the growth of Au on AgNR seeds, through employing the Na₃Au(SO₃)₂ complex as precursor to inhibit GR and the MBIA ligand as surface energy tuning agent to induce anisotropic growth, the GR-free growth of Au-Island on AgNR was successfully achieved. More interestingly, GR-free site-specific growth of Au-Islands on the entire surface, both tips, and single tip of AgNRs was also realized by varying the concentration of MBIA or the amount of AA reductant, demonstrating the excellent feasibility in synthetic control. These AgNR–Au Janus-like structures exhibit tunable localized surface plasmon resonance (LSPR) across the UV–Vis-NIR range and strong surface-enhanced Raman scattering (SERS) signals, making them promising candidates for LSPR- and SERS-based applications. Our synergistic ligand-mediated structure control strategy can be extended to other bimetallic systems, thus enabling the construction of sophisticated heterostructures with enhanced or new properties for various applications.
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高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 10
·700
·
IF 5.4
Zhao Xinyuan,Xu Bingxin,Zhang Wei,Wei Haiyan,Zhang Yu,Chen Wenwen,Shang Ming,Wang Cuijuan
A portable ozone detection strategy is reported based on derivatization-assisted surface-enhanced Raman spectroscopy (SERS). The strategy integrates active sampling, chemical derivatization, and signal enhancement using high-index gold trisoctahedrons embedded in a porous hydrogel (Au TOHs/hydrogel), assembled into a 48-well microdevice. Ozone is selectively captured by eugenol and converted to formaldehyde, which reacts with 3-methyl-2-benzothiazolinone hydrazone (MBTH) to form a Raman-active azo compound, enabling sensitive detection. The SERS signal at 1270 cm − 1 exhibited a strong linear correlation with the logarithm of analyte concentration (R 2 = 0.996). The limit of detection under simulated air conditions is 5.80 × 10 − 6 mg/m 3 . The SERS sensor demonstrated high stability, spatial uniformity, and reproducibility (RSD < 10%), along with good selectivity against common volatile organic compounds. Validation with air samples and comparison with ultraviolet-visible UV-vis spectrophotometry further supports its applicability. This cost-effective and user-friendly platform shows potential for point-of-use detection of trace ozone. Graphical abstract
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危险品化学品经营许可证（带存储）