查找使用阿拉丁产品的科研文献

Dual functional Z-scheme ReS2/CdIn2S4 catalyst efficiently photocatalyzes H2O2 production and CO2 reduction in pure water without sacrificial agents

Wenhua Fu,Nan Li,Qian Dong,Gang Zhao,Shirui Zhang,Yi Wu,Kai Zhao,Jiangquan Ma

Photocatalytic production of hydrogen peroxide (H 2 O 2 ) and carbon dioxide (CO 2 ) reduction has been the hotspots in the field of chemical industry for a long time. CdIn 2 S 4 is widely used due to its excellent thermal stability and significant absorption in the visible light region. However, the low efficiency of photogenerated charge separation hinders its practical application. In this work, Z-scheme heterojunction ReS 2 /CdIn 2 S 4 was successfully synthesized by hydrothermal method and applied for the first time in photocatalytic production of H 2 O 2 and CO 2 reduction. The experimental results show that compared with pure CdIn 2 S 4 or pure ReS 2 , the photocatalytic performance of ReS 2 /CdIn 2 S 4 is greatly improved. When the loading amount of ReS 2 is 12 wt. % of CdIn 2 S 4 , it exhibits the optimal photocatalytic H 2 O 2 productivity of 361.8 μmol h -1 g -1 and the optimal yields of CO and CH 4 of 89.84 and 5.03 μmol h -1 g -1 respectively in pure water. The Z-scheme heterojunction of ReS 2 /CdIn 2 S 4 was determined by XPS and the band structure. In addition, two possible reaction pathways involving O 2 - and 1 O 2 were analyzed for the H 2 O 2 production by RS/CIS and the pathway of carbon dioxide reduction reaction can be speculated through in-situ DRIFTS.

Biomass-derived carbon combined with scalable NiZnP nanosheets building superior structurization electrode towards high-performance supercapacitors

Xian Sun,Yong Yao,Zhongxu Chen,Jinhui Yang,Jiahui Jiang,Jiangmei Su,Li Zhang

The hierarchical NiZn phosphides nanosheets matched with porous carbon by structural engineering become pivotal to reduce cost and enhance charges storage capability, yet remain a challenge for the adjustable generation for ion-facilitated transportation. Herein, we report the hybrid material of red-date based N, S doping carbon and NiZn metal phosphide significantly undergone morphological evolution with the assistance of carbon additive. The surface NiZnP nanosheets have significantly dispersed by bonding with metal ions and S heteroatom of the eligible carbon, inducing extremely transfer band in hybrid interface and uniquely endowing petal-like nanostructure. Due to the scalable nanostructure and the merits including bringing intercalation, regulating electronic state, and promoting electroactive transport, the optimized hybrid electrode displays outstanding specific capacitance of 1215.6 F g −1 at 0.5 A g −1 and high-rate property. The constructed ASCs exhibit superior electrochemical properties, e.g., enhanced energy density, extended voltage range and considerable cycling stability, which is obviously superior to the devices based on single NiZnP or AC negative electrode. The work provides new perspective for the exploration of regulating hybrid carbon/metal phosphide materials and application in enhanced-performance energy storage devices.

Solvothermal construction of MIL-101(Fe)/Bi₂S₃ Z-scheme heterojunctions: performance in photo-fenton degradation of antibiotics and dyes

Yang Minjie,Zou Congyang,Ji Yufeng,Liu Ruijie,Xu Ying

A novel MIL-101(Fe)/Bi₂S₃ Z-scheme heterojunction with a metal–organic framework (MOF) structure was synthesized via a solvothermal method. Compared with pristine MIL-101(Fe) and pristine Bi₂S₃, this composite exhibits a significant breakthrough in degradation performance toward rhodamine B (RhB) and tetracycline hydrochloride (TCH). Specifically, it achieves a degradation efficiency of 95.7% for 20 mg/L TCH within 120 min and 98.6% for 40 mg/L RhB within 90 min.Characterizations including X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS), and electrochemical impedance spectroscopy (EIS) confirm that the MOF structure of MIL-101(Fe) provides a stable support matrix for Bi₂S₃. Moreover, the construction of the Z-scheme heterojunction can effectively suppress the recombination of photogenerated electron–hole pairs while retaining the strongly oxidizing hydroxyl radicals (・OH) and strongly reducing superoxide radicals (・O₂⁻). More importantly, after five recycling cycles, the degradation efficiencies of the composite for TCH and RhB remain at 86.8% and 88.6%, respectively, with no obvious damage to its crystal structure after cycling. This demonstrates superior structural stability and reusability compared to most reported MOF-based photo-Fenton catalysts.

High-performance photoelectrochemical immunosensor for ultrasensitive detection and species identification of ancient leather artifacts

Ruixue Sun,Lubin Hua,Qingqing Jia,Xiaojing Kang,Lianpeng Lv,Yichang Li,Hui Si,Chao Zhang,Hailiang Yang,Yang Zhou,Bing Wang

Ancient leather artifacts provide critical insights into prehistoric and historic clothing and leatherworking techniques. However, their accurate detection and species identification remain challenging due to material degradation and environmental contamination. In this study, a high-performance photoelectrochemical (PEC) immunosensor was developed based on MoS₂/NiCo₂O₄-Ag@CoFe₂O₄ nanocomposites for the highly sensitive and specific analysis of archaeological leather. The immunosensor leverages a MoS₂/NiCo₂O₄ heterostructure for optimized energy band alignment and incorporates plasmonic Ag@CoFe₂O₄ nanocomposites to facilitate electron transport, significantly enhancing photoelectric conversion efficiency. A sandwich-type signal amplification strategy was employed, achieving an ultra-low detection limit of 0.1034   pg/mL (S/N = 3) and a broad linear range of 10⁻³–10² ng/mL, representing a two-order-of-magnitude improvement in sensitivity over conventional ELISA. The sensor demonstrated exceptional specificity, successfully distinguishing collagen from non-collagenous proteins and differentiating bovine collagen from pig collagen. In addition, it exhibited high stability and reproducibility, with a relative standard deviation (RSD) of 2.97%. Practical applicability was confirmed through qualitative and quantitative analysis of leather samples from multiple archaeological sites in Xinjiang, China. These results establish the proposed immunosensor as a reliable and robust tool for ancient leather identification, with potential applications in the analysis of other protein-based archaeological materials.

MoS2 nanoflowers loaded with L-Arg and activated by IR780 for NO release in a cascade manner for elimination of drug-resistant bacteria and biofilms

Feiyang Xu,Ting Cui,Haidong Shen,Hongfu Liu,Jianfei Xie,Kai Yang,Yugui Tao

Multidrug-resistant (MDR) bacterial infections remain a critical public health concern worldwide, with conventional antibacterial strategies presenting limitations such as inconsistent target localization, suboptimal therapeutic efficiency, and progressive antimicrobial resistance development. Nitric oxide (NO), a bioactive molecule, exhibits potent antibacterial effects, resulting in the emergence of NO-based gas therapy as a promising and innovative therapeutic strategy. However, these therapies present the principal challenge of effective NO delivery, owing to its short half-life and limited diffusion capacity. Hence, this study aimed to develop AI‑molybdenum disulfide (L-Arg/IR780@MoS 2 ) nanoflowers (NFs) employing L-arginine (L-Arg) as an endogenous NO precursor and MoS 2 as a dual carrier for L-Arg and IR780 iodide (IR780). Following near-infrared irradiation during photodynamic therapy, generated reactive oxygen species initiated an oxidation cascade for L-Arg-to-NO conversion. The produced NO, in combination with photothermal therapy, modulated the bacterial microenvironment. This significantly altered the expression of key genes in MDR bacteria associated with nucleotide metabolism and biofilm formation, thereby effectively disrupting biofilms and suppressing bacterial growth. Furthermore, the AI-MoS 2 NFs exhibited notable ancillary therapeutic benefits, including anti-inflammatory activity, enhanced re-epithelialization, increased collagen deposition, and angiogenesis modulation, which collectively accelerated wound healing. Altogether, the findings of this study present a synergistic therapeutic strategy designed to address the dual challenges posed by bacterial biofilms and antimicrobial resistance.

Supra-Carbon dots for methyl-paraoxon detection using a new controllable IFE-based method

Mai Luo,Jihai Cai,Sijia Pu,Ting Wang,W. Sijia,Mengwei Wang,Shuangpeng Wang,Songnan Qu,Liang Zou,Peng Li,Jinchao Wei

Introduction Pesticide residues pose a significant threat to human health. Inner filter effect (IFE) stands out for its ability to enable the rapid and cost-effective establishment of fluorescent detection systems. Nevertheless, the practical implementation is often hindered by issues such as low spectral overlap and interference from impurities, which can compromise its effectiveness. Objectives To develop novel AIEE-type CDs and apply them to improve the efficiency of IFE-based strategies. With the aid of AIEE-type CDs, we aim to develop a multi-channel detection platform that provides more reliable fluorescent probes for real sample and imaging applications. Methods Preparation of N, S-CDs was achieved using a novel combination of sources. The activation mechanism of Supra-CDs’ AIEE characteristics was verified. In the methodological experiments, detection performance of Supra-CDs was tested to confirm their improvement in the IFE-based strategy, practical applicability for real sample detection, and imaging capability. Results In this work, p-PA and thiourea were used for the first time to prepare N, S-CDs. After adding water, the fluorescence intensity of Supra-CDs increased by nearly 360 % compared to N, S-CDs. Spectral overlap rates of the target and probe in the controllable IFE-based system improved from 1.80 % to 33.11 %, indicating superior analytical performance in aqueous solutions compared to ethanol. The fluorescent method exhibited a linear range of 0.5–100 μM, with a detection limit of 0.5 μM. Furthermore, a smartphone-based system has been proposed for the colorimetric analysis of methyl paraoxon, offering a more convenient and efficient alternative. Additionally, Supra-CD demonstrated exceptional capabilities in cell imaging, specifically targeting intracellular lipids within HepG2 cells. Conclusion This study unveils a new type of Supra-CDs that exhibit AIEE property. It also introduces a creative fluorescent sensor with tunable IFE. In summary, this research delivers important insights into AIEE-type Supra-CDs and affirms their potential to inspire broader applications.

Minimizing energy loss based on ultrathin Co-Ni3S2 for enhanced electrocatalytic nitrate to ammonia

Zutao Zhang,Peiyuan Xiao,Jinping Mei,Xinyu Zhang,Duoduo Chen,Chenlu Jiang,Rong Huang,Qiufang Yao,Shiqing Sun

To address the challenge of high energy consumption (EC) in electrocatalytic nitrate reduction (ERN) for ammonia (NH 3 ) synthesis, this study proposes a dual strategy: engineering advanced anode materials and replacing the sluggish oxygen evolution reaction (OER) with the thermodynamically favorable urea oxidation reaction (UOR). A three-dimensional nanosheet Co-doped Ni 3 S 2 /NF (Co-Ni 3 S 2 /NF) self-supporting anode was prepared via a facile hydrothermal method. Co doping transformed the morphology from rod-like (Ni 3 S 2 /NF)) to nanosheet flower-like (Co-Ni 3 S 2 /NF), which quantitatively increased the BET surface area and electrochemical active surface area (ECSA) by approximately 7.6 and 14 times, respectively, thereby exposing a greater number of active sites. XRD revealed a ∼ 0.4° positive shift due to lattice contraction (Co 3+ radius 0.545 Å < Ni 2+ radius 0.69 Å), while a 3.1 cm −1 Raman shift indicated strengthened Ni S bonds and enhanced charge transfer. Consequently, the anode exhibited a large electrochemical active surface area (119.54 cm 2 ) and low charge-transfer resistance. It delivered superior catalytic activity, with an OER overpotential 86 mV lower than commercial Pt at 10 mA cm −2 , and a further 149 mV reduction when switched to UOR. Turnover frequency (TOF) analysis revealed that the enhanced performance originated predominantly from the increased density of active sites rather than their intrinsic activity. In combination with a Mn-CoNiP/NF cathode, UOR substitution reduced EC by 21.7 % while maintaining high NH 3 Faradaic efficiency (FE > 98 %), selectivity (SE > 95 %), and a yield rate of 1289.8 mg h −1  g −1 at −0.58 V vs. RHE. The system also demonstrated stable performance over 76 h. These findings highlight the potential of anode modulation via morphology engineering to lower energy demand in ERN, offering a sustainable strategy for efficient NH 3 production and nitrate remediation.

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.

PdCo@NC-based colorimetric dual-wavelength for highly sensitive Hg ions detection

Liling Wang,Yanbin Wang

Hg 2+ ions, as one of the prevalent toxic heavy metals, are ubiquitously distributed in food and environmental systems. Consequently, there is an urgent demand to develop a convenient and reliable detection platform. In this study, heteroatom-doped PdCo@NC nanozymes were synthesized by pyrolyzing bimetallic metal-organic frameworks (MOFs) in argon, combining MOF-derived porous carbon with C/N co-doping. The resultant PdCo@NC-500 material exhibits a flower-like morphology with defects and uniform elemental distribution, demonstrating unique intrinsic peroxidase-like activity. This enables the oxidation of TMB in the absence of H₂O₂, with catalytic performance surpassing that of single-metal systems. Key reaction intermediates (•OH, 1 O₂) were verified through quenching experiments. Kinetic analysis revealed that this material possesses high catalytic efficiency ( K m  = 0.101 mM, V max  = 238.9 × 10 −3  M/s). Notably, following the distinctive REDOX reaction between H₂O₂ and Hg 2+ , the peroxidase-like activity of PdCo@NC-500 is significantly inhibited, enabling selective alteration of the reaction pathway and changing the product color from blue to yellow. This unique response characteristic provides a foundation for designing colorimetric sensors, achieving dual-wavelength colorimetric detection of Hg 2+ . Experimental results indicate that the linear range of this method is 50–1000 μM (λ = 450 nm) and 0.5–100 μM (λ = 652 nm), with a detection limit of 0.02 μM. This method has been successfully applied to highly sensitive detection of Hg 2+ in real water samples and rice, with recovery rates ranging from 94.87 % to 109.1 %.