LANGMUIR
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2025
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IF 3.9
Min Xu,Zhayun Gong,Yangyang Wu,Zhiyong Zhu,Kun Wang,Hefeng Xu,Cong Yu,Xiaodong Chu
4-Nitrophenol (4-NP) pollution in the chemical, dye, and other industries poses significant risks to humans and aquatic organisms. In this study, we prepared metal oxide-supported gold nanoparticles (AuNPs/Al2O3, AuNPs/TiO2, and AuNPs/ZnO) and applied them to the catalytic reduction of 4-NP. The Bader charge and differential charge, dos and d band centers, work function, and reaction free energy of AuNP composites were analyzed through DFT calculations. The influence of metal oxide carriers on the catalytic activity of AuNPs was explored, which decreased in the following order: AuNPs/Al2O3 > AuNPs/TiO2 > AuNPs/ZnO. In addition, the catalytic reduction performance of these AuNP composites for 4-NP in the presence of NaBH4 was investigated. The results showed that the AuNPs/Al2O3 catalyst exhibited the best performance (3.62 ± 0.17 min–1), consistent with the theoretical calculations. Meanwhile, the AuNPs/Al2O3 catalyst exhibited good reusability. More relevantly, the catalytic reduction mechanism of metal oxide-supported AuNPs for 4-NP was proposed from both experimental and theoretical calculations.
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Advanced Materials Technologies
·
2025
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IF 6.2
Jingwen Liao,Wenya Li,Jingna Zhao,Zehui Zhao,Kai Ren,Wei Cheng,Yongyi Zhang,Xiaohua Zhang,Qingwen Li
Absorption-dominated electromagnetic shielding materials play a critical role in modern high-frequency, sensitive, and complex electronic systems due to their abilities of minimizing secondary interference and electromagnetic pollution. Carbon nanotube (CNT) assembly material is a kind of excellent absorption type shielding material, but the relatively lower electrical conductivity limits its shielding performance. Compositing CNT and metal together can effectively facilitate the merits of both materials. Here, an expansion-based in situ composition strategy is proposed to embed Au particles into CNT network and lead to CNT/Au fiber. The obtained composite fiber has the characteristics of uniform distribution of Au particles, light weight, and also exhibits higher mechanical and electrical performance. The addition of Au particles plays an important role in enhancing the shielding performance (electromagnetic shielding effectiveness up to 85 dB, A/R up to 2.36) of fabrics, demonstrating an obvious absorption-dominated feature. Moreover, the CNT/Au fabric also demonstrates excellent environmental stability.
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MICROCHEMICAL JOURNAL
·
2025
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IF 5.1
Zeyu Wu,Linghao Zhao,Yangkun Sun,Yufeng Zhang,Yuerong Wang,Min Zhang,Hongyang Zhang,Fanghong Ning,Ping Hu
Hydrogen peroxide (H 2 O 2 ), a type of reactive oxygen species (ROS) produced by cells, plays a significant role in various physiological processes. Its abnormal concentrations in human body are closely associated with cellular damage as well as a variety of major diseases. Consequently, sensitive and accurate detection of cellular H 2 O 2 concentration is of great significance in evaluating the degree of intracellular oxidative stress in human cells. In this study, a novel heterogeneous nanomaterial, rGO@PDA@MXene-Au@COF, was designed for electrochemical-colorimetric dual-mode detection of intracellular H 2 O 2 , which enhances both peroxidase and electrochemical activities, achieving lower detection limits and broader linear ranges. ESR spectroscopy, EIS resistance analysis and computational simulation were employed to verify the mechanism of the activity enhancement, and the detection conditions were optimized. The methods were subsequently applied to the determination of H 2 O 2 in cells, yielding results of 1.69 × 10 −14 M H 2 O 2 /cell and 1.59 × 10 −14 M H 2 O 2 /cell for electrochemical and colorimetric detection of MCF-7 cells, and 1.67 × 10 −14 M H 2 O 2 /cell and 1.58 × 10 −14 M H 2 O 2 /cell of Hela cells, respectively. These results demonstrated high sensitivity and anti-interference capabilities, enabling quantitative detection of H 2 O 2 in complex cellular environments. Furthermore, the similarity in results between the two methods confirms their mutual accuracy and reliability. This work provided a novel approach for designing multifunctional nanomaterials and detecting H 2 O 2 in cells.
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ANALYTICA CHIMICA ACTA
·
2025
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IF 6
Zhou Yang,Lingling Dai,Fangfei Liu,Kun Jia,Zhiyuan Ren,Yanmei Yang,Qingmeng Zhang,Weifeng Li,Ming Chen
Background Folate is an essential nutrient, but its bioavailability varies greatly depending on the molecular form present in food. The intake of forms that are not readily absorbed by the human body may lead to insufficient folate levels, particularly during pregnancy, thereby increasing the risk of birth defects. As a result, it is essential to develop a highly sensitive and accurate method capable of distinguishing between the two most common natural folates, 5-methyltetrahydrofolate (5-MTHF) and 5-formyltetrahydrofolate (5-FTHF), to ensure proper folate intake and health outcomes. Results In this study, a photochemical method was employed to load gold nanoparticles (Au NPs) onto carbon nanotubes (CNTs), successfully synthesizing CNTs@Au NPs nanocomposites that exhibit excellent thermal stability and robust surface-enhanced Raman scattering (SERS) activity. These nanocomposites, capable of maintaining structural integrity at temperatures as high as 400 °C, serve as highly effective substrates for in situ high-temperature SERS detection. Using this reliable high-temperature-assisted SERS approach, the structural changes of both folates at elevated temperatures were effectively monitored, enabling clear molecular fingerprinting and distinct differentiation between the two natural folates. Moreover, the CNTs@Au NPs demonstrate exceptional sensitivity, achieving a detection limit as low as 10 -8 M for both 5-MTHF and 5-FTHF, enabling accurate quantification of mixed folate samples and demonstrating reliable performance in real sample analysis. Significance The CNTs@Au NPs with in situ high-temperature SERS capabilities show great potential for various analytical applications. In particular, they provide an effective method for monitoring the quality of folate in dietary supplements and fortified foods, thus contributing significantly to the safety and quality assurance of folate products in the market.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yuyu Peng,Yina Jiang,Chunyan Wang,Kelei Pang,Xiwang Li,Xiaofeng Zhou,Zhengjie Wang
Surface-enhanced Raman scattering (SERS) technique has significant advantages in the detection of gaseous small molecules, but it still faces challenges such as low adsorption capacity of gaseous small molecules on the surface of the SERS substrate, and low detection sensitivity due to the small Raman scattering cross section. In this paper, a nucleophilic addition strategy based on Ag@Au@4-nitrophenylhydrazine (4-NPH) @zeolite imidazolium ester backbone material-8 (ZIF-8) is proposed for achieving highly sensitive SERS detection of gaseous acetone. The SERS sensing platform was constructed by synthesizing Ag@Au nanoparticles with a core-shell structure modified with 4-NPH as a Raman reporter molecule, which was then encapsulated in a ZIF-8 porous framework. The nucleophilic addition reaction mechanism between acetone and 4-NPH was systematically investigated using density-functional theory (DFT), which revealed the changes in Raman spectra of 4-NPH due to the reaction and provided a theoretical basis for the specific detection of acetone. In addition, the charge transfer effect of more adsorption sites between the reaction product and the nanogold surface further enhanced the SERS signal. The constructed SERS substrate was demonstrated to have a low relative standard deviation (RSD) as low as 4.8 % for the detection of gaseous acetone, which ensured high sensitivity and reliability, and could detect at a concentration of 100 ppb. The method's excellent immunity to interference in complex exhaled gases gives it the potential to be applied to the non-invasive diagnosis of diabetes, demonstrating significant clinical applications.
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Nano Materials Science
·
2024
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IF 12.6
Mirza Abdullah Rehan,Honghua Liang,Guiqiang Li
The construction of a well-defined and efficient Z-scheme heterostructure with enhanced photogenerated charge carriers and their rapid transfer is vital for realizing efficient photocatalytic hydrogen production, to achieve carbon neutrality. Herein, we study the H 2 evolution reaction by rationally constructing a hybrid Au-anchored UiO-66-NH 2 with localized surface plasmon resonance (LSPR) properties, embedded with ZnIn 2 S 4 /MoS 2 nanosheets. Interestingly, the synergistic effect of excellent heterojunction, tunes additional catalytic active sites, provides effective separation of photogenerated charges at the junction interface and establishes a dedicated microenvironment for the boosted electron transfer. Notably, the optimized hybrid photocatalyst (Au 6 @U6N) 15 /ZIS/MS 5 exhibits highly efficient H 2 generation of 58.2 mmol g −1 h −1 , which is almost 16 and 1.5 folds of the pristine ZIS and MS/U6N/ZIS, correspondingly. It has an apparent quantum efficiency of 19.6% at a wavelength of 420 nm, surpassing several reported MOF-based ZnIn 2 S 4 photocatalytic H 2 evolution activities. Significantly, this research provides insights into the design of interface-engineered plasmonic MOF with layered encapsulated heterostructures that elucidate the role of plasmonic LSPR effect and efficiently regulate the charge transfer with enhanced microchannels, hence boosting the visible-light-driven photocatalytic activity for realizing efficient green energy conversion.
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Nano Energy
·
2022
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IF 19.069
Xue Liu,Shaojie Jing,Chaogang Ban,Kaiwen Wang,Yajie Feng,Cong Wang,Junjie Ding,Bin Zhang,Kai Zhou,Liyong Gan,Xiaoyuan Zhou
Noble metal decoration is one of the most efficient strategies to boost the performance for water oxidation . However, identifying the role of noble metals and especially the active sites remain a persistent challenge. Here, we report a direct synthesis of Au nanoparticles (NPs) decorated NiFe oxyhydroxides via in-situ electrochemical conversion and a comprehensive study of the activity boost via a combination of systematic experimental and theoretical studies. We found that Fe doping greatly improved the electrical conductivity and the Fe sites were the dominant active centers, collectively responsible for the remarkably enhanced performance in NiFe oxyhydroxide. Upon Au NPs decoration, the content of high-valence Fe/Ni ions was substantially reduced and the formation of surface oxygen vacancy was greatly suppressed. As a result, the dominant active centers transfer to the interfacial Au sites that directly participate in catalyzing water oxidation. Our study presents a fundamental insight into the origin of activity enhancement and especially the active centers in noble metal decorated NiFe oxyhydroxide catalysts.
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MATERIALS LETTERS
·
2025
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IF 2.7
Yihui Qian,Wenqing Xue,Shuimiao Xia,Zhicheng Shi
The development of advanced electronic equipment provides new opportunities for the application of polymer films. However, polymer films are constrained by their relatively low energy storage density. To overcome this challenge, Au@Ag/BaTiO 3 nanofibers with different sputtering time are designed and prepared by the electrospinning and sputtering method. Experimental results show that the metal nanoparticles improve the charge storage capacity of the polymer and greatly elevate the dielectric constant. The limitation of charge carriers by the minuscule metal nanoparticles considerably increases the breakdown strength. Au@Ag/BaTiO 3 /P(VDF-HFP) composite film achieved the maximum discharge energy density of 13.93 J cm −3 at 655 kV mm −1 , which represents a 124% increase compared to P(VDF-HFP). This contribution provides a new and feasible direction for ceramic nanofibers to optimize the energy storage capacity of composite films in dielectric capacitors.
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Analytical Methods
·
2024
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IF 2.7
Huanxin Xiao,Weiguang Chen,Mingxia Lin,Shilin Jiang,Xiping Cui,Suqing Zhao
Cervical cancer (CC) remains one of the most severe global health challenges affecting women, primarily due to persistent infection with high-risk human papillomavirus (HPV) subtypes, particularly with HPV16 and HPV 18. Effective detection of these high-risk HPV strains is crucial for CC prevention. Current screening programs for HPV DNA include PCR and in situ hybridization, which are accurate and sensitive. However, these approaches demand a high level of expertise, along with expensive instruments and consumables, thus hindering their widespread use. Therefore, there is a compelling demand to develop an efficient, straightforward, and cost-effective method. Herein, we propose a lateral flow immunoassay (LFIA) method based on Au@PdPt nanoparticles for the simultaneous detection and genotyping of HPV16 and HPV18 within 15 min. This innovative approach allows for qualitative assessment by the naked eye and enables semi-quantitative detection through a smartphone. In this study, under optimal conditions, the qualitative visual limits of detection (vLOD) for HPV16 and HPV18 reached 0.007 nM and 0.01 nM, respectively, which were 32-fold and 20-fold more sensitive than conventional AuNPs-LFIA for HPV16 and HPV18, respectively. Meanwhile, semi-quantitative limits of detection (qLOD) for HPV16 and HPV18 were 0.05 nM and 0.02 nM, respectively. In conclusion, our formulated approach represents a significant step forward in HPV detection and genotyping, with the potential to enhance accessibility and effectiveness in the early diagnosis of CC at the point of care and beyond.
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TALANTA
·
2024
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IF 5.6
Xue Zhang,Yunsheng Shang,Qi Xie,Xingzhe Hu,Ke Wu,Lu-Lu Qu,Yingqiu Gu
Developing a Surface-enhanced Raman spectroscopy (SERS) method with excellent detecting ability, good recyclability and analyzing multiple pollutants rapidly are critical for evaluation of water quality in emergency pollution affairs. While constructing a multifunctional substrate with these characteristics to realize the application of SERS in water quality monitoring remains a challenge. In this work, a reusable Au@R–Fe 3 O 4 /g-C 3 N 4 SERS substrate is prepared by loading Au nanoparticles (Au NPs) on Fe 3 O 4 nanorings (R–Fe 3 O 4 ) and the formed Au@R–Fe 3 O 4 is further combined with g-C 3 N 4 nanosheets through a simple electrostatic assembly method. The Au@R–Fe 3 O 4 /g-C 3 N 4 nanocomposite presents multifunction of magnetic enrichment, SERS signal enhancement, multiple pollutants analyzing, and photocatalytic activity , which achieves quantitative detection of rhodamine B (RhB), tetracycline hydrochloride (TC), and 4-chlorophenol (4-CP), with detection limits of 5.30 × 10 −9 , 7.50 × 10 −8 , 7.69 × 10 −8 mol/L, respectively. Furthermore, the recyclable detection capability of Au@R–Fe 3 O 4 /g-C 3 N 4 for multi components is demonstrated by the strong SERS signal after 9 cycles of “detection-degradation” processes. Combined with good uniformity and stability, this SERS method based on Au@R–Fe 3 O 4 /g-C 3 N 4 substrate provides a new strategy for the multi-pollutants detection and degradation in water environment.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
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IF 5.6
Yifan Liu,Yuling Lin,Ying Chen,Jianhui Huang,Yuancai Lv,Xiaoxia Ye,Chunxiang Lin,Guifang Yang,Minghua Liu
Here, valonia tannin and sulfhydryl functional groups were added to the cellulose aerogel from waste textiles to form a thiol-modified tannin-immobilized cellulose-based aerogel (TVTCA) with selective adsorption and outstanding reducing properties. This aerogel was then utilized to recycle Au(III) in the water. The resulting 3D TVTCA contained abundant -SH groups and phenolic hydroxyl groups and exhibited stable crystal structure and good thermal properties. TVTCA showed excellent Au (Ⅲ) adsorption performance (598.3 mg/g of maximum adsorption capacity) and strong reductivity (78 %). The adsorption process was conducted using both the pseudo-second-order kinetic model and the Langmuir adsorption isotherm model. In addition, TVTCA displayed excellent anti-interference ability. Even though the coexisting ions concentration was as high as 100 mmol/L, TVTCA still owned a high Au adsorption capacity (178.91–224.14 mg/g) and selectivity factor (29.16–2629.34), which was much higher than valonia tannin-immobilized cellulose-based aerogel (VTCA). Furthermore, the recycling of Au with TVTCA mainly included adsorption and in-situ reduction processes. The mechanisms involved the electrostatic interaction and chelation effects, which were ascribed to the introduced sulfhydryl groups. Meanwhile, the in-situ Au reduction was mainly caused by the studies showing that the high adsorption capacity of TVTCA was owing to the phenolic hydroxyl groups on the introduced valonia tannin. All the findings would provide a new way to achieve the recycling of precious metals from wastewater by using valuable cotton waste.
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AICHE JOURNAL
·
2024
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IF 3.5
Yifan Yan,Pengjie Hao,Yu Fu,Wangsong Chen,Qiwei Shi,Hua Zhou,Xianggui Kong,Zhenhua Li,Mingfei Shao,Xue Duan
Utilizing sustainable electrocatalysis to upcycle glycerol (GLY; the by-product of biodiesel) to lactic acid (LA; the key monomers for biodegradable polymer) is an efficient way to reduce the cost of biodiesel, which is also consistent with the waste-to-wealth principle. However, current research still suffers from issues of low LA selectivity (<80%), especially at high current density. Herein, we designed a cooperative catalyst by modifying BiO x nanolayers on gold nanoparticles (BiO x /Au), achieving high LA selectivity (82%) at high current density (226 mA cm −2 at 1.05 V vs. RHE), outperforming most of the reported works in the literature. We reveal that BiO x could promote the adsorption of the middle hydroxyl of GLY, which facilitates the formation of DHA and thus enables high LA selectivity. Moreover, the electron-deficient Au in BiO x /Au is responsible for the enhanced current density, which is more beneficial to generate reactive oxygen species (OH*). To further reveal the application potential of this electrocatalytic strategy, we realized that the conversion of crude GLY extracted from cooking oil to LA coupled with H 2 production using a membrane-free flow electrolyzer, demonstrating a sustainable fashion to convert biodiesel waste into high value-added product and H 2 fuel.
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危险品化学品经营许可证（带存储）