MOLECULES
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2024
·Vol. 29
·期 22
·5418
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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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JOURNAL OF CHROMATOGRAPHY A
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2024
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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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FOOD CHEMISTRY
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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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JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Feijing Xu,Nian Yin,Shanjun Gao,Chunhui Shen
Ammonium polyphosphate (APP) and intumescent flame-retardant di-(3-amin-opropyltriethoxysilane) spirocyclic pentaerythritol diphosphate (PDAP) were prepared as an intumescent flame retardant with synergistic effect, and polylactic acid (PLA) was modified by melt blending. The flame retardancy of PLA/PDAP/APP was evaluated by limiting oxygen index (LOI), vertical combustion test (UL-94), and cone calorimetry test (CCT), and the thermal stability of PLA/PDAP/APP was studied by thermogravimetric analysis and thermogravimetry-Fourier transform infrared spectroscopy (FTIR). The possible flame-retardant mechanisms of PLA/PDAP/APP were analyzed based on the results of laser Raman spectroscopy and FTIR. When PDAP:APP = 2:1 and the addition amount of PDAP/APP is 20 wt%, the LOI value of PLA/IFR-modified material is as high as 43%, and the UL-94 test reaches V-0 level, and in the CCT, the PHRR and THR of PLA/PDAP/APP (2:1)-modified material are reduced by 80.7% and 76.8%, respectively, compared with pure PLA, and the carbon residue is as high as 62.01%. The results show that the compound APP/PDAP has an excellent flame-retardant effect on PLA, which provides a good research case for PLA flame-retardant-modified plastic materials.
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CHEMICAL ENGINEERING JOURNAL
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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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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Shuai He,Rongrong Ren,Liwu Qiang,Man Zhao,Qinyun Yan,Wei Wen,Junming Zhang,He Xiao,Jianfeng Jia
The development of efficient, non-precious electrocatalysts for the oxygen evolution reaction (OER) is critical for sustainable energy conversion technologies. Here, a core-shell structured catalyst C@CoFeSi-P, with vertically aligned cobalt iron silicate nanosheets grown in-situ on hollow mesoporous carbon spheres (HMCS), is synthesized via the hard-template-assisted hydrothermal method followed by low-temperature phosphating. To solve the sluggish kinetics of OER, this design integrates hierarchical porosity, conductive carbon matrices, and optimized electronic structures. The characterization results reveal that Fe doping induces lattice expansion in Co 2 SiO 4 , and phosphate modification generates an amorphous surface rich in unsaturated coordination sites, which collectively enhances the adsorption of oxygen intermediates (*OH, *O, and *OOH). The density functional theory (DFT) calculations demonstrate that the synergistic effects of Fe incorporation and PO 4 3- groups lower the energy barrier (ΔG = 0.29 eV) for the potential-determining step (*O → *OOH), accelerating reaction kinetics. This C@CoFeSi-P catalyst reaches superior OER performance, with overpotentials of 277 mV at 10 mA cm −2 and 404 mV at 100 mA cm −2 . Except that, it also exhibits remarkable stability over 40 h, surpassing most reported transition metal silicate-based catalysts. Furthermore, the Pt/C‖C@CoFeSi-P system displays superior overall water-splitting efficiency compared to conventional Pt/C‖RuO 2 , highlighting its practical potential. This work provides a guidance for multi-scale modulation of electrocatalysts through atomic doping and surface engineering, offering a cost-effective alternative to noble-metal-based systems for sustainable energy applications.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Tinglei Wang,Lu Zhang,Laipeng Sun,Jiaqi Zhao,Yuan Wang,Zexing Qu,Yu Wang
The site-specific boron-doped graphitic carbon nitride (B-g-C3N4-20) has been synthesized via precise solid-state synthesis methods. Thermodynamic analysis indicates that its excellent reproducibility stems from similar activation energies of the dehydration and condensation reactions involving phenylboronic acid and melamine, as well as the dehydration polymerization of melamine with cyanuric acid. It allows both reactions to occur concurrently, leading to the orderly arrangement of intercalated molecules within the carbon nitride nanosheets, facilitating targeted boron incorporation. The boron atoms of the intercalated molecules not only form triple bonds with nitrogen atoms, horizontally arranging in an ordered manner, but also vertically interact with tertiary nitrogen atoms of the carbon nitride nanosheets. This dual-directional ordered interaction between boron and nitrogen creates atomic-scale p–n junctions at the microscopic level and exhibits a pronounced p–n junction effect at the macroscopic level. Such structural characteristics significantly improve the transport pathways for photogenerated charge carriers, resulting in a remarkable increase in photocatalytic performance with a hydrogen peroxide production rate 30 times higher than that of pure graphitic carbon nitride under neutral conditions. This work not only offers additional perspectives for advancing solid-state synthesis methods but also serves as an innovative example for the development of other functional materials.
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SENSORS AND ACTUATORS B-CHEMICAL
·
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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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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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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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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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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