Separations
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2024
·Vol. 11
·期 9
·268
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IF 2.5
Jiamin Sun,Ling Tang,Chenglong Li,Jingjing Quan,Li Xu,Xingming Ning,Pei Chen,Qiang Weng,Zhongwei An,Xinbing Chen
ZnIn2S4nanosheets are a promising photoanode for driving photoelectrochemical (PEC) hydrogen fuel production; nevertheless, poor charge separation and sluggish surface reaction kinetics hinder its PEC performance to an extreme degree. Herein, a facile element doping strategy (i.e., P element) was developed to obtain the desired photoanode. As a result, the ZnIn2S4-P (ZIS-P5) photoanode exhibits a remarkable photocurrent density of 1.66 mA cm−2at 1.23 V versus a reversible hydrogen electrode (VRHE) and a much lower onset potential of 0.12 V vs. RHE for water oxidation. Careful electrochemical analysis confirms that the P doping and sulfur vacancies (Sv) not only facilitate the hole transfer, but also boost surface reaction kinetics. Finally, the “killing two birds with one stone” goal can be achieved. Moreover, the optimized photoanode also presents high PEC performance for urea oxidation, obtaining a photocurrent density of 4.13 mA cm−2at 1.23 V vs. RHE. This work provides an eco-friendly, simple and effective method to realize highly efficient solar-to-hydrogen conversion.
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JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Yifei Jiang,Xiaodan Qiu,Xuejia Zhao,Yao Fu,Wenling Su,Yiran Li,Zhiling Zhu,Limin Zuo,Xiaofang Lian,Huiyi Liu,Qingying Jia,Jing Yao,Guangzhi Shan
Sulfonate esters, one class of genotoxic impurities (GTIs), have gained significant attention in recent years due to their potential to cause genetic mutations and cancer. In the current study, we employed the dummy template molecular imprinting technology with a dummy template molecule replacing the target molecule to establish a pretreatment method for samples containing p-toluene sulfonate esters . Through computer simulation and ultraviolet–visible spectroscopy analysis, the optimal functional monomer acrylamide and polymerization solvent chloroform were selected. Subsequently, a dummy template molecularly imprinted polymer (DMIP) was prepared by the precipitation polymerization method, and the polymer was characterized in morphology, particle size, and composition. The results of the adsorption and enrichment study demonstrated that the DMIP has high adsorption capability (Q = 7.88 mg/g) and favorable imprinting effects (IF = 1.37); Further, it could simultaneously adsorb three p-toluene sulfonate esters. The optimal adsorption conditions were obtained by conditional optimization of solid-phase extraction (SPE). A pH 7 solution was selected as the loading condition, the methanol/1 % phosphoric acid solution (20:80, v/v) was selected as the washing solution, and acetonitrile containing 10 % acetic acid in 6 mL was selected as the elution solvent. Finally, we determined methyl p-toluene sulfonate alkyl esters, ethyl p-toluene sulfonate alkyl esters, and isopropyl p-toluene sulfonate alkyl esters in tosufloxacin toluene sulfonate and capecitabine at the 10 ppm level (relative to 1 mg/mL active pharmaceutical ingredient (API) samples) by using DMIP-based SPE coupled with HPLC. This approach facilitated the selective enrichment of p-toluene sulfonate esters GTIs from complex API samples.
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ACS Sensors
·
2024
·
IF 8.2
Yangyang Huo,Limin Qiu,Tianqi Wang,Hui Yu,Wenyuan Yang,Xiangting Dong,Ying Yang
The development of a portable, low-cost sensor capable of accurately detecting H2S gas in exhaled human breath at room temperature is highly anticipated in the fields of human health assessment and food spoilage evaluation. However, achieving outstanding gas sensing performance and applicability for flexible room-temperature operation with parts per billion H2S gas sensors still poses technical challenges. To address this issue, this study involves the in situ growth of MoS2 nanosheets on the surface of In2O3 fibers to construct a p–n heterojunction. The In2O3@MoS2-2 sensor exhibits a high response of 460.61 to 50 ppm of H2S gas at room temperature, which is 19.5 times higher than that of the pure In2O3 sensor and 322.1 times higher than that of pure MoS2. The In2O3@MoS2-2 also demonstrates a minimum detection limit of 3 ppb and maintains a stable response to H2S gas even after being bent 50 times at a 60° angle. These exceptional gas sensing properties are attributed to the increase in oxygen vacancies and chemisorbed oxygen on In2O3@MoS2-2 nanofibers as well as the formation of the p–n heterojunction, which modulates the heterojunction barrier. Furthermore, in this study, we successfully applied the In2O3@MoS2-2 sensor for oral disease and detection of food spoilage conditions, thereby providing new design insights for the development of portable exhaled gas sensors and gas sensors for evaluating food spoilage conditions at room temperature.
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MOLECULES
·
2024
·Vol. 29
·期 22
·5418
·
IF 4.2
Shuo Yang,Tianna Wu,Kaiyue Li,Ping Huang,Wenhui Li,Yuquan Zhuo,Keyan Liu,Ziwen Yang,Donglai Han
With the intensification of the energy crisis and the growing concern over environmental pollution, particularly the discharge of organic dye pollutants in industrial wastewater, photocatalytic degradation of these contaminants using solar energy has emerged as an effective, eco-friendly solution. In this study, we successfully synthesized 2D/2D g-C3N4/BiOI p-n heterojunctions via a simple precipitation method and a high-temperature calcination method. The unique 2D structures of g-C3N4nanosheets (NSs) and BiOI NSs, coupled with the synergistic effect between the two materials, significantly enhanced the photocatalytic degradation performance of the heterojunctions under simulated sunlight. The band structures, as determined by Tauc curves, Mott–Schottky curves and XPS-VB analysis, revealed a Z-scheme charge transfer mechanism that efficiently reduced charge carrier recombination and improved electron–hole separation. The photocatalytic activity of 2D/2D g-C3N4/BiOI p-n heterojunctions for rhodamine B (Rh B) degradation reached 99.7% efficiency within 60 min, a 2.37-fold and 1.27-fold improvement over pristine BiOI NSs and g-C3N4NSs, respectively. Furthermore, the heterojunction exhibited excellent recyclability stability, with the degradation efficiency decreasing by only 1.2% after five cycles. Radical scavenging experiments confirmed the involvement of superoxide radicals (∙O2−) and hydroxyl radicals (∙OH) as the primary reactive species in the degradation process. This work highlights the potential of 2D/2D g-C3N4/BiOI p-n heterojunctions for efficient photocatalytic applications in environmental remediation.
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Sustainable Materials and Technologies
·
2024
·
IF 8.6
Lei Guo,Yan-He Chen,Li-Mei Xu,Xiao-Lu Chen,Jin-Qiu Shen,Jian-Yong Zhang,Zhen-Jiang Liu
Herein, a fern-like p-n heterojunction by anchoring Ni 3 Fe-LDH nanoplates onto Co 3 O 4 nanoneedles have been optionally constructed. Essentially, p-n heterojunction ensured to induce strong built-in electric field, and inherit interfacial electron redistribution. Based on their compatible and well-matched electronic band structures, a staggered type-II photo-generated electron/holes transfer pathway have been elaborated by density functional theory calculation (DFT), in situ irradiation X-ray photoelectron spectroscopy (XPS), and fluorescent decay. This band bending and charge migrating module conferred the architecture with strong redox ability, sufficient exciton dissociation, and admirable optoelectronic characteristics. Moreover, the heterostructure acquired broad absorption spectrum to exhibit outperforming photocatalytic effect. Totally, this electron redistribution at the hierarchical interface, a type-II scheme charge-transfer pathway and the oxygen defects would lead to high efficiency in solar light assisted N 2 reduction. Typically, Co@Ni 3 Fe-2 catalyst exhibited the highest NH 3 production rate of 16.15 μg h −1 mg cat. −1 and Faraday efficiency (FE) of 31.57% at −0.6 V vs. RHE in 0.1 M Na 2 SO 4 solution. Fortunately, with light exposure, the NH 3 production rate and FE could increase by 27.9% and 18.1% than that under dark. This work would provide a plausible attitude towards the design of high efficient photocatalyst for artificial photosynthesis with multi-functionalized coupling effect.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Shuiqin Chai,Yuting Chi,Wanlin Sun,Xin Hou,Shuchen Pei,Kang Luo,Wenyi Lv
The abuse of tetracycline can lead to its residue in animal derived foods, posing many potential hazards to human health. Therefore, rapid and accurate detection of tetracycline is an important means to ensure food safety. Nitrogen doped and phosphorus doped silicon quantum dots (N-SiQDs, P-SiQDs) with remarkable optical stability were fabricated via a one-pot hydrothermal procedure in this study. Upon the excitation at 346 nm, N-SiQDs and P-SiQDs emitted fluorescence at 431 nm and 505 nm, respectively. Two SiQDs had the potential to serve as a probe for detecting low concentrations of tetracycline (TC), employing a mechanism of the static quenching effect. The calibration curves of N-SiQDs and P-SiQDs were linear within the range of 0–0.8 μM and 0–0.4 μM, the limits of detection were low as 5.35 × 10 −4 μmol/L and 6.90 × 10 −3 μmol/L, respectively. This method could be used successfully to detect TC in honey samples. Moreover, the remarkable antibacterial efficacy of two SiQDs could be attributed to the generation of a large number of intracellular reactive oxygen species. The SEM images showed that the structure of bacterial cell was disrupted and the surface became irregular when treated with both SiQDs. These properties enabled potential usage of SiQDs as excellent antibacterial material for different biomedical applications.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuejia Yin,Yajie Chen,Xinyan Yu,Qiuyu Zhang,Yaxin Ru,Guohui Tian
During the photocatalytic CO 2 reduction process, fast charge transport, abundant active sites, and high visible light utilization in photocatalysts are key to achieving excellent CO 2 conversion efficiency. In this work, we have designed and prepared hierarchical CuS@SnS 2 p-n heterostructure hollow cubes for photocatalytic CO 2 reduction. First, a monolayer of CuS was in situ generated on the pre-prepared Cu 2 O cubes to construct core–shell Cu 2 O@CuS cubes by sulfidation of Cu 2 O cubes. The following etching process led to the formation of CuS hollow cubes. Finally, the hierarchical CuS@SnS 2 p-n heterostructure hollow cubes were obtained by growing SnS 2 nanosheets on the CuS hollow cubes. The prepared CuS@SnS 2 p-n heterostructure hollow cubes showed an improved photocatalytic CO 2 reduction activity compared with the bare CuS and SnS 2 control samples. The p-n heterojunction formed between SnS 2 and CuS as well as its hollow structure enhanced the charge carrier separation efficiency and the light absorption capacity of the hybrid catalyst. Furthermore, after the decoration of Au nanoparticles, the formed Schottky junction further discouraged the charge carrier recombination. Thus, the cooperative p-n heterojunction and Schottky junction greatly facilitated photocatalytic CO 2 reduction, and exhibiting the maximum CO and CH 4 yields of 140.1 and 77.5 μmol g −1 h −1 , respectively. This work presents an efficient design of high-performance catalysts for photocatalytic CO 2 reduction.
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
·
IF 7.7
Bin Jiang,Jiayun Guan,Yilin Lv,Chaojie Yang,Minfeng Yang,Xinyu Shen,Bin Xu,Qi Wang,Yuling Qin,Li Wu
The cholinergic hypothesis constitutes a pivotal theoretical framework for elucidating the pathological mechanisms underpinning Alzheimer's disease (AD). Quantitative assessment of cholinesterases (ChEs) and NAD(P)H levels in neuronal cells, particularly within the septo-hippocampal pathway, is imperative for the comprehensive study of the cholinergic system. In this study, we designed and synthesized a dual-channel, dual-enzyme-responsive fluorescent indicator that was chemically optimized for detecting levels of ChEs and NAD(P)H in neuronal cells. Biological experiments demonstrated that this indicator can sensitively and reliably visualize the dynamics of intracellular ChEs and NAD(P)H following stimulation. The corresponding ChEs activities and NAD(P)H concentrations demonstrated a linear correlation with fluorescence intensity, reaching equilibrium within a few minutes. This innovative and precise technique for visualizing ChEs and NAD(P)H dynamics with high spatial resolution during the progression of AD is expected to serve as a robust tool for investigating alterations in the cholinergic nervous system, including changes in acetylcholine neurotransmission and neuronal energy metabolism.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xingrui Gao,Xiao Liu,Xixi Di,Yixuan Shi,Dong Liu,Jingxi Yang,Zuoping Zhao,Wei Wang,Xiaohui Ji,Xianzhao Shao
Environmentally friendly advanced oxidation (AOPs) is an effective means to treat trace amounts of antibiotics in water. However, traditional transition metal catalysts face challenges of metal leaching, limiting their practical utility. In this research, by activating peroxymonosulphate (PMS) using a nitrogen-phosphorus co-doped porous carbon (NP-HPMC-900) catalyst, a non-radical-dominated degradation mechanism was achieved. Material characterization revealed uniform distribution of N (3.35 at%) and P (2.56 at%) dopants in NP-HPMC-900, significantly enhancing the electronic structure and defect density ( I D /I G = 0.86) of the carbon framework. Catalytic degradation experiments demonstrated that NP-HPMC-900 achieved 90 % tetracycline hydrochloride (TCH) removal within 30 min at pH 4, 6 and 10, with a superior apparent speed constant ( k obs = 0.02671 min −1 ) compared to conventional metal-based catalysts. Density functional theory (DFT) calculations confirmed that N-P doping modulated the local electron density of carbon matrix, enhancing its electron donor properties and PMS activation capability. Ecological toxicity assessments revealed significantly reduced phytotoxicity of degradation products, validating environmental safety. This study proposes a general strategy for activating PMS through N-P co-doped carbon materials from the perspective of catalyst-PMS synergistic degradation of pollutants, providing theoretical and practical insights into metal-free catalysts for sustainable water treatment.
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Advanced Fiber Materials
·
2025
·
IF 21.3
Zhou Mi,Huang Lele,Wan Yuhang,Jiang Qing,Qu Xueru,Mia Md Hasib,Xu Jie,Gao Chao,Hou Lin,Yu Zhicai,He Hualing
Firefighting clothing provides essential safeguards for firefighters while engaging in fire suppression and life rescue operations. However, the inability to actively detect hazardous gas and self-thermal degradation of conventional firefighting clothing induce critical safety threats to firefighters. Herein, we design a dual-mode perceptual sensor via programmable assembly of single-walled carbon nanotubes (SWCNTs) and Ti 3 C 2 T x MXene@MoS 2 nanocomposite in dual-mode triaxial structural aerogel fiber (DM-TSF) for both selective NH 3 and temperature monitoring. The DM-TSF is prepared through triaxial wet spinning, with an alternating p / n -type thermoelectric (TE) core, a signal decoupling aramid nanofibers layer, and an NH 3 sensing outer sheath. The TE core is composed of alternately interconnected p -type/SWCNT and n -type SWCNT/Polyethyleneimine, which exhibits high TE efficiency (8.44 μV K −1 for p -segment, 7.44 μV K −1 for n -segment) and wide-range (10–500 °C) temperature monitoring in DM-TSF. Furthermore, the abundant adsorption sites and high-density Schottky heterojunctions of the Ti 3 C 2 T x MXene@MoS 2 nanocomposite in the outer sheath enabled DM-TSF to exhibit an outstanding sensitivity (3.14% ppm −1 @20 ppm) and high selectivity for NH 3 . A portable wireless system based on DM-TSF was further developed and integrated into firefighting clothing for temperature and NH 3 monitoring, triggering alarms within 2 s and 28 s, respectively. This work sheds new light on the fabrication of intelligent multiplex hazard detection fibers that can respond to multi-hazard elements, thereby enhancing firefighters’ safety in complex fire scenarios. Graphical
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zhuling Shao,Yanli Wu,Chengxu Gu,Yuyang Ma
A novel polysaccharide, designated PS1–1, was isolated from the marine fungus P. sclerotiorum , which was obtained from a sponge found in the Xisha Islands of the South China Sea. PS1–1 was a heteropolysaccharide with a molecular weight of 7.66 kDa, and consisting of mannose, galactose, and a small amount of glucose in an approximate ratio of 8.35:2.07:1.0. Structural characterization via methylation analysis and NMR spectroscopy revealed that PS1–1 (7.66 kDa) consists of a backbone of →6)-α-D-Man p -(1 → and →2)-α-D-Man p -(1→, with side chains of →2)-β-D-Gal f -(1→, →2)-α-D-Man p -(1→, and α-D-Glc p -(1→), composed of mannose, galactose, and glucose in a ratio of 8.35:2.07:1.0. In high-fat diet and STZ-induced type 2 diabetic mice, PS1–1 significantly reduced fasting blood glucose, improved glucose tolerance, and alleviated insulin resistance (decreased HOMA-IR by 59.28 % in the high-dose group). It also ameliorated dyslipidemia (reducing TG, TC, LDL-C by 54–57 %) and oxidative stress (increasing SOD activity and T-AOC). These findings suggest that PS1–1 possesses promising therapeutic potential for the management of type 2 diabetes and may offer a basis for further development in diabetes treatment.
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CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Zhipeng Zhang,Yao Yin,Kai Liang,Ranzhao Shen,Xu Fan,Bihe Yuan
The high flammability and severe dripping behavior of ethylene-vinyl acetate (EVA) limit its widespread application. It remains a persistent challenge to enhance the flame retardancy and smoke suppression performance of EVA composites while maintaining their tensile properties. In this study, a microencapsulated P/N/B-based flame retardant, referred to as MBPAPP, was synthesized via a one-pot method. The flame retardant consists of a melamine-boric acid composite (MA-BA, shell) and piperazine pyrophosphate (PAPP, core). At a loading of 20 wt% MBPAPP, EVA/MBPAPP composite achieves a UL-94 V-0 rating without dripping. In the cone calorimetry test, compared with EVA/PAPP, EVA/MBPAPP exhibits reductions in the peak heat release rate (50.5 %), total heat release (16.9 %), total smoke production (17.1 %), and the peak of CO content (52.5 %). This is attributed to the fact that EVA/MBPAPP forms a boron-containing char layer composed of B-O and B-N structures, contributing to the enhancement of compactness and thermal stability. Moreover, compared with PAPP, microencapsulation enhances the compatibility between modified MBPAPP and EVA, mitigating the deterioration of tensile properties in the composite.
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危险品化学品经营许可证（带存储）