查找使用阿拉丁产品的科研文献

Constructing a Bi–O–Mo electronic bridge bond and active sites over Bi/Bi2MoO6/Bi24O31Br10 to boost the stepwise transfer of electrons for efficient CO2 photoreduction

Huihui Ding,Huanhuan Wu,Jun Ma,Xiang Li,Shuangshuang Huai,Shijian Zhang,Wenbin Ruan,Xiuxiu Huang,Xiufang Wang,Wenjie Xie

The high interfacial charge transfer barrier has been a primary thermodynamic obstacle in enhancing the catalytic performance of heterojunction materials. Optimizing the interfacial environment is a promising strategy to attain superior catalytic efficiency. Hence, a Bi/Bi2MoO6/Bi24O31Br10 (Bi/BMO/BOB) composite photocatalyst was constructed by introducing a Bi–O–Mo bridge bond between the BMO and BOB interfaces and modifying metal active sites on the surface of the complex. Bi/BMO/BOB has a good capacity for CO2 photoreduction to CO. The CO yield of the Bi/BMO/BOB photocatalyst is 68.29 μmol g−1 h−1, which is obviously higher than those of the pristine BMO and BOB. As proved by density functional theory (DFT) calculations and experimental characterization, the Bi–O–Mo interface bridge bond adjusts the electronic structure of the contact interface and enhances the interface charge separation and transport rate. Moreover, the metal Bi nanoparticles synthesized through in situ reduction not only realize electron transfer and storage as electron collectors, but also strengthen the adsorption of CO2 molecules. The synergistic action of the two can allow the effective transfer of photogenerated electrons from BMO to BOB, which then accumulate on Bi. Such stepwise transfer of electrons increases the speed of photocatalytic reduction processes that involve multiple electrons, and effectively reduces the reaction energy barrier in the process of CO2 reduction. This mode of interatomic electron transfer bridges combined with the metal active sites not only solves the stability issues in bismuth-based semiconductors, but also aids in the development of more efficient photocatalytic systems for reduction of CO2.

Flexible MoS2-based wearable SERS sensor for noninvasive early diagnosis of glutaric acidemia

Qi Liu,Wenrou Yu,Luo Ren,Anping Liu,Zhaoxian Chen,Xuliang Xia,Yuqin Xie,Yingzhou Huang

Construction of NiWO4/Mn0.3Cd0.7S S-Scheme Heterojunction for Superior Visible Light Photodegradation of Tetracycline

Weijie Yuan,Kanglong Zhang,Minghui Zhu,Jiamin Huang,Xue-Yang Ji,Dafeng Zhang,Junchang Liu,Xipeng Pu

The misuse of tetracycline (TC) poses a significant threat to the natural environment, necessitating the development of efficient methods for its degradation. Heterojunction photocatalysts have emerged as a promising approach for the degradation of such pollutants. This work aims to construct a novel NiWO 4 /Mn 0.3 Cd 0.7 S (NWO/MCS) S-scheme heterojunction using solvothermal coupled with mechanical mixing methods for efficient photocatalytic degradation of TC. The optimized NWO/MCS composite exhibited an 82% removal rate within 40 minutes under visible light irradiation, which represents an 18.4-fold and 1.13-fold improvement compared with pristine NWO and MCS, respectively. Various analytical methods and DFT calculations were utilized to characterize the structure and photophysical properties as well as prove the electron flow of the heterojunction, respectively. This work provides evidence of efficient charge carrier transfer between NWO and MCS within the S-scheme heterojunction, which contributes to the enhanced photocatalytic activity. The rational structural configuration of the S-scheme heterojunction has been shown to improve both the reduction and oxidation capabilities, offering a potential pathway for developing photocatalysts with high antibiotic removal efficiency.

Inkjet Printing and Hydrogen-Assisted Annealing of Mo1–xNbxS2 Alloy Films for Ultrawide-Range Flexible Temperature Sensors

Yilin Zhou,Kexin Wang,Yingzhe Li,Chenxin Yuan,Manzhang Xu,Lu Zheng,Xuewen Wang,Weiwei Li

With the rapid advancement of Industry 4.0, aerospace, energy, and chemical engineering, temperature sensors are facing technical demands in high-temperature environments. Conventional temperature sensing materials, limited by their performance under extreme conditions, struggle to meet the requirements of modern industries. To address this challenge, this study proposes a fabrication process combining inkjet printing with hydrogen-assisted thermal annealing, leveraging the unique electronic structure and tunable physicochemical properties of molybdenum–niobium disulfide (Mo1–xNbxS2). This method enables the controllable preparation of Mo1–xNbxS2 alloy thin films, where inkjet printing facilitates low-cost, patterned fabrication and hydrogen annealing modulates crystallinity and defect density. The Mo1–xNbxS2-based flexible temperature sensor exhibits outstanding sensing performance, including a reliable temperature response across a broad range (10–1000 K) and exceptional stability after a 1000 cyclic thermal test. This work not only provides a promising solution for temperature monitoring in extreme environments but also opens new avenues for the development of next-generation flexible electronics.

Preparation of g-C3N4-based photocatalytic nanofibers and antibiotic degradation performance research

Yanjin Wang,Zhuo Zhang,Lin Shi,Lidong Kou,Yasong Li

With the extensive use of antibiotics around the world, their contamination problem has now attracted increasing attention, and seeking effective antibiotic contamination management technologies has been imminent. Visible light photocatalytic technology, as an emerging green technology with low cost, high efficiency and good application prospect, has become a research focus both at home and abroad. In this paper, graphitic phase carbon nitride (g-C 3 N 4 ) was used as a photocatalytic material, and the composite photocatalysts g-C 3 N 4 /MoS 2 , g-C 3 N 4 /CuS, g-C 3 N 4 /CdS were produced by compounding it with a series of metal sulfides, and the physical and chemical properties of the composite photocatalysts were characterized by means of SEM, TEM, BET, XRD, XPS, FT-IR, and UV-VIS-NIR. The results show that the prepared composite photocatalytic materials do not change the morphological structure of g-C 3 N 4 , and the introduction of metal sulfides can effectively enhance the light absorption performance and photocatalytic activity of the composites. The best removal of typical antibiotic sulfadimethylpyrimidine (SMT) in water was achieved by g-C 3 N 4 /CdS, with the most stable photocatalytic performance, and the complete removal of SMT could be achieved after 6 h of photocatalysis under LED illumination conditions at wavelengths of 420 nm and 365 nm. g-C 3 N 4 /CdS had the highest photocatalytic activity at pH = 3. Optimal g-C 3 N 4 /CdS was used to prepare flexible polyacrylonitrile carrying carbon nitride nanofiber photocatalysts (PAN/g-C 3 N 4 /CdS) by electrostatic spinning method, which had excellent light absorption properties in UV and visible light regions. SMT removal of PAN/g-C 3 N 4 /CdS reached 100.00% after the light was turned on for 6 h at a wavelength of 365 nm, indicating that the nanofiber photocatalytic materials prepared in this study have excellent photocatalytic activity and antibiotic degradation performance. This paper has important theoretical and practical significance for solving the problem of antibiotic pollution in water bodies.

Atomic-shell engineering in manganese-doped palladium@iridium nanozymes: d-Band optimization for enhanced peroxidase-like activity in ultrasensitive lateral flow immunoassays

Ting Tan,Qianqian Cao,Ming-Hui Duan,Junmin Li,Yafeng Xie,Min Tan,Xiwu Yin,JiKai Wang,Weiguo Wang

Lateral flow immunoassay (LFIA) has been widely used in clinical diagnosis, food safety, and environmental protection due to the simple operation and high detection efficiency. However, the sensitivity of LFIA still falls short of the requirements when dealing with low levels of biomarkers. In this work, a type of manganese-doped core-shell nanozyme (Pd@Ir-Mn) with an ultrathin iridium (Ir) shell (~2 nm) was synthesized and utilized for the signal amplification of LFIA. By doping with other metals (Mn, Fe, Co, Ni, Cu, and Zn), the d-band center of Ir was tuned. The relationship between the d-band center and the conversion coefficient followed a volcano plot, with Mn-doped Pd@Ir located at the peak of the volcano. The as-prepared Pd@Ir-Mn was finally applied to LFIA (HT-Pd@Ir-Mn-LFIA) for the detection of hCG, the sensitivity was improved by 41 times compared to the traditional gold nanoparticles based LFIA (AuNPs-LFIA). Moreover, this method exhibited good specificity, stability, precision, and accuracy, making it suitable for clinical detection.

Defect-engineered oriented construction of S-scheme heterojunctions: Efficient photocatalytic performance of NiS-loaded TiO2 nanoflowers

Peng Qiao,Jianwei Zhang,Wenyi Wang,Yijie Lin,Meiru Zheng,Xin Guo,Yibo Liu,Yuanyuan Wang,Jiaojing Zhang,Hua Song,Xueqin Wang

Developing semiconductors with optimal bandgaps and enhancing their photocatalytic performance remain key challenges in achieving efficient hydrogen evolution from water splitting. TiO 2 nanoflowers with open architectures, which provide abundant active sites, show significant potential in this field. Additionally, the construction of photocatalysts using S-scheme heterojunctions has been proven to improve redox capacity, while the introduction of oxygen vacancies has been shown to increase efficiency. Therefore, in this study, NiS-loaded TiO 2 nanoflowers were fabricated by a simple template-free solvothermal method. Oxygen vacancies were constructed by partially reducing the composite with a low NiS concentration. The synergistic effect of the oxygen vacancies and heterojunctions greatly improved the visible-light response of the catalyst, and the degradation rate of rhodamine B reached 99.81 % in 3 h under visible light. The transient photocurrent response of 1.0 wt% NiS-TiO 2 nanoflowers was 47.52 μA·cm −2 and the rate of hydrogen evolution achieved 1782.28 μmol·g −1 ·h −1 , approximately 6.5 times higher than that of pristine TiO 2 nanoflowers. The transfer process of electrons was verified by calculation using density functional theory, and an electron transport mechanism for the S-scheme heterojunction is also proposed to illustrate the photocatalytic mechanism. The as-prepared NiS-loaded TiO 2 nanoflowers could be prime candidate for the photocatalytic hydrogen evolution from water splitting and degradation of organic pollutants.

NiO/ZnCdS Nanocomposite as an Efficient and Stable Visible-Light-Driven Photocatalyst for CO2 Photoreduction

Jing Fan,Shizhen Gao,Yanan Yang,Yuming Dong,Qi Qi,Fenhong Song,Jie Liu

As the world grapples with energy shortages and environmental challenges, photocatalytic CO 2 reduction has emerged as a game-changing solution in sustainable technology. By converting carbon dioxide into high-value hydrocarbon fuels, this innovative approach not only helps combat climate change but also paves the way for a cleaner, greener energy future. Developing high-performance, low-energy-consumption, and long-term stable photocatalysts remains a critical challenge in advancing sustainable technologies. In this study, the plate-like NiO supported ZnCdS nanoparticles with high stability is prepared by solvothermal method. Compared with ZnCdS and NiO, the photocatalytic properties of the composite materials are obviously improved. As a consequence, the 12NiO/ZnCdS composite exhibited CO evolution rates of 71.13 μmol·g -1 ·h -1 , 6.8 times higher than those of pristine ZnCdS. The selectivity toward CO reached 75%. Characterization results confirmed the successful synthesis of the catalyst, where the interfacial interaction between composite components formed a built-in electric field. This mechanism afforded more active sites, enhanced light absorption properties, and promoted carrier migration rate under photoexcitation. The efficient charge separation not only suppressed photo-corrosion but also enhanced the catalyst's reductive capacity for CO 2 reduction. This study establishes a novel design paradigm for engineering highly stable ZnCdS-based photocatalysts toward solar-driven CO 2 conversion, offering compelling inspiration for material innovation. Furthermore, the fundamental principles elucidated herein provide a valuable framework to guide future exploration in related energy-transduction technologies.

Interlayer-Spacing-Modification of MoS2 via Inserted PANI with Fast Kinetics for Highly Reversible Aqueous Zinc-Ion Batteries

Shuang Fan,Yangyang Gong,Suliang Chen,Yingmeng Zhang

Layered transition metal dichalcogenides (TMDs) have gained considerable attention as promising cathodes for aqueous zinc-ion batteries (AZIBs) because of their tunable interlayer architecture and rich active sites for Zn2+storage. However, unmodified TMDs face significant challenges, including limited redox activity, sluggish kinetics, and insufficient structural stability during cycling. These limitations are primarily attributed to their narrow interlayer spacing, strong electrostatic interactions, the large ionic hydration radius, and their high binding energy of Zn2+ions. To address these restrictions, an in situ organic polyaniline (PANI) intercalation strategy is proposed to construct molybdenum disulfide (MoS2)-based cathodes with extended layer spacing, thereby improving the zinc storage capabilities. The intercalation of PANI effectively enhances interplanar spacing of MoS2from 0.63 nm to 0.98 nm, significantly facilitating rapid Zn2+diffusion. Additionally, the π-conjugated electron structure introduced by PANI effectively shields the electrostatic interaction between Zn2+ions and the MoS2host, thereby promoting Zn2+diffusion kinetics. Furthermore, PANI also serves as a structural stabilizer, maintaining the integrity of the MoS2layers during Zn-ion insertion/extraction processes. Furthermore, the conductive conjugated PANI boosts the ionic and electronic conductivity of the electrodes. As expected, the PANI–MoS2electrodes exhibit exceptional electrochemical performance, delivering a high specific capacity of 150.1 mA h g−1at 0.1 A g−1and retaining 113.3 mA h g−1at 1 A g−1, with high capacity retention of 81.2% after 500 cycles. Ex situ characterization techniques confirm the efficient and reversible intercalation/deintercalation of Zn2+ions within the PANI–MoS2layers. This work supplies a rational interlayer engineering strategy to optimize the electrochemical performance of MoS2-based electrodes. By addressing the structural and kinetic limitations of TMDs, this approach offers new insights into the development of high-performance AZIBs for energy storage applications.

Green extraction of oat saponins based on deep eutectic solvents

Yawen Zhang,Hongli Zhang,Jiangong Ma,Jing Zhao,Huajuan Yin,Xu Jing,Xiaowen Wang

With the advent of new-generation green extraction solvents, deep eutectic solvents (DESs) present significant prospects for the extraction of bioactive substances. In this study, saponins were extracted from oats using an ultrasonic-assisted method with green DESs, replacing conventional toxic organic solvents. Adding sodium chloride markedly reduced solubility, resulting in the separation of two phases from the extract: DES and water. The saponins were separated into the water phase, while the DES was reused in subsequent extractions, supporting extractant recycling and promoting sustainable development. Adding salt offers a more gentle, convenient, and cost-effective alternative to current phase separation methods, such as pH adjustment, temperature variation, and carbon dioxide or nitrogen gas application. Optimizing the extraction and recovery parameters yielded the highest oat saponin extraction efficiency at 18.73 mg g –1 , and the recovery was 86.4 %. When compared with ethanol extracts, DES extracts exhibited superior antioxidant activity. Lastly, the greenness of this extraction method was confirmed through three greenness evaluation programs of greenness. The extraction method based on emerging responsive solvents can be extended to other hydrophilic bioactive substances.

One-step Electrodeposition Prepared MoS2 Composed Ni3S2/Ni(OH)2 Nanosheets as High Efficient and Stable Metal Sulfide Catalyst for Hydrogen Precipitation in Alkaline Solutions

Li Shunming,Hu Pengyu,Qu Jingzong,Zhou Jie,Wang Zibo,Wang Yanan,Sun Tao,Chen Anran

Hydrogen evolution reaction (HER) in alkaline media demands cost-effective and highly active electrocatalysts to replace noble metals. Herein, we report a ternary MoS₂/Ni₃S₂/Ni(OH)₂ nanoflower composite supported on nickel foam (NF) via a facile one-step electrodeposition strategy. This method enables precise control of MoS₂ morphology while mitigating aggregation-induced active site blockage. The synergistic interplay among MoS₂ (exposing edge sites), conductive Ni₃S₂, and Ni(OH)₂ (modulating electronic structure) significantly enhances HER kinetics. Notably, the optimal catalyst (5-min deposition) achieves ultralow overpotentials of 48 mV at 10 mA cm⁻² and 175 mV at 100 mA cm⁻² in 1.0 M KOH, surpassing most reported Ni- or Mo-based catalysts. Furthermore, it exhibits exceptional stability with negligible activity loss after 5000 cycles and 72-hour continuous operation. XPS analysis reveals that a high Mo⁴⁺/Mo⁶⁺ ratio facilitates electron delocalization, accelerating hydrogen intermediate desorption. This work establishes a new paradigm in HER catalyst design through interface-engineered ternary systems. By unifying electronic synergy theory with the SPRE synthesis method, we overcome the activity-stability trade-off plaguing binary catalysts. The demonstrated 500-hour stability at industrial current densities (100 mA cm⁻²) positions this approach as a transformative solution for scalable green hydrogen production. Graphical

A flower-like S, N-codoped carbon nanosheets with hybrid magnetic nanoparticles derived from MOFs for the construction of disposable nitrofurazone sensor

Xinmei Qian,Chunxiang Li,Mingyu Zheng,Keqin Deng

A flower-like S, N-codoped carbon nanosheets loaded with hybrid magnetic nanoparticles (HMNPs/S,N-CNSs) by using MOF as precursor was prepared. The morphology, composition, microstructure, and property were evaluated by SEM, HRTEM, EDS, XRD, XPS, magnetic analysis, and cyclic voltammetry. The hybrid nanoparticles were composed of most Fe 3 O 4 , some CoFe alloy, and a few Fe 2 S. The magnetic material showed high magnetism and brilliant electrocatalysis towards the electrochemical reduction of antibiotic nitrofurazone (NFZ). By utilizing screen-printed electrode (SPE) and HMNPs/S,N-CNSs, a disposable electrochemical NFZ sensor (HMNPs/S,N-CNSs/SPE) was fabricated by magnetic control. The current signal of NFZ at HMNPs/S,N-CNSs was 6.38 times higher than that of bare SPE. It displayed a wide detection range of 0.01–50 μM with a detection limit of 4.2 nM (S/N = 3). The practical applicability of the sensor in real samples presented satisfactory results. The disposability, low cost, high sensitivity, low consumption volume in analyses, and good selectivity make the proposed sensor a promising tool for NFZ detection.