FlatChem
·
2024
·
IF 5.9
Siqi Gong,Jing Li,Fan Zhao,Mengdie Yan,Chenghao Huang,Guanzhong Huo,Chunli Li,Bing Wu,Jiapeng Liu
The emerging energy-saving and environmentally friendly capacitive deionization (CDI) technology has attracted more and more attention. However, it remains a great challenge to develop CDI electrode materials with excellent comprehensive properties. Herein, the porous N, P co-doping Ti 3 C 2 T x MXene (N, P-Ti 3 C 2 T x ) was prepared successfully by combining simple flocculation with an annealing process. Benefitting from the synergistic effect of the combination of porous structure and co-doping of N and P heteroatoms, the N, P-Ti 3 C 2 T x exhibits substantial specific surface area, which provides more surface bounding active sites for electrochemical reactions, thus assisting to boost the CDI performance. As a result, the N, P-Ti 3 C 2 T x exhibited an admirable salt (Na + ) adsorption capacity of 53.3 mg g −1 and exceptional recycling property. Impressively, the N, P-Ti 3 C 2 T x also exhibited superior desalination performance of Pb 2+ , characterized by an exceptionally high desalination capacity of up to 168.2 mg g −1 at 1.2 V, and the corresponding desalination rate reached 0.047 mg g −1 s −1 . Additionally, the deionization mechanism involved was elucidated through a series of characterizations. This work will furnish an effective avenue for the innovative design of MXene-based electrode materials toward high-performance CDI.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Huiling Yuan,Qihang Sun,Jinming Chang,Hejun Gao,Juan Zhang,Fang Liao,Hongquan Fu,Yunwen Liao
The rapid expansion of nuclear energy confronts ecological challenges, especially the analysis of heavy water (D 2 O) in radioactive wastewater. The unique red carbon (C 3 O 2 ) molecule spontaneously polymerizes into highly conjugated fluorescent structures, p(C 3 O 2 ) n , enabling us to deeply investigate their recognition mechanism for D 2 O, as aggregation-induced emission luminogens. Density functional theory calculations and experiments reveal the π–π stacking crystal structure of p(C 3 O 2 ) n nanosheets in an aggregated state, enhancing their fluorescence properties in solution. This allows for highly sensitive, fast (< 0.2 s), and stable detection of D 2 O, with a minimum detection limit of 2.91×10 −5 %, unaffected by external factors. The fluorescence quenching is attributed to hydrogen bond formation between -C=O groups and D 2 O's D atoms (static quenching) and intramolecular electron transfer (dynamic quenching). Thus, p(C 3 O 2 ) n polyesters serve as an effective luminescent probe for D 2 O sensing, offering a novel approach for designing conjugated fluorescent polyesters.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Xu Liu,Xuxu Zhai,Yuheng Zhao,Liang Shan,Zhongqing Liu,Yuefeng Liu
Sulfur element is widely applied as a non-metallic dopant into carbon framework for the modulation of their chemical activities. An interesting question is whether the intrinsic catalytic performances for the H 2 S selective oxidation to sulfur can be manipulated by sulfur element introduction into carbocatalysts. In this study, we employ a simple solvent-free method to introduce S atoms into framework of N-doped carbocatalysts, resulting in a notable enhancement of the product S selectivity with negligible loss of H 2 S selective oxidation. The experimental results show that the as-synthesized N-S-C-2 catalyst exhibits a H 2 S conversion of 97.5 % and sulfur selectivity of >80 % at a high O 2 -to-H 2 S ratio (2.5) under continuous mode (over the dew point temperature of sulfur, c.a. 210 °C), while also demonstrating robust stability (> 100 h), anti-CO 2 (up to 50 vol%) and anti-oxidation properties. Kinetic analysis and H 2 S/O 2 -TPD-MS results reveal that S introduction attenuates the adsorption and dissociation of H 2 S and O 2 by the N-doped carbon catalyst. Furthermore, density functional theory calculations elucidate that S doping elevates the adsorption energies of H 2 S and O 2 at the pyridinic N site, thereby moderately reducing the adsorption of H 2 S and O 2 , consequently preventing the over-oxidation of H 2 S to SO 2 and enhancing S selectivity. The double doping promotion effect of carbon materials reported in this investigation offers an alternative insight for the development of highly selective carbon desulfurization catalysts.
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MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Xutong Duan,Yongfei Wang,Ruijie Guo,Baolong Niu,Huifang Wang,Hong Yan
To solve the problems of poor corrosion resistance, low adhesion and poor abrasion resistance of general superhydrophobic coatings, A superhydrophobic nano-SiO 2 /N-doped carbon dots ( N -CDs) was prepared on the surface of AZ31B magnesium alloy. The electrolyte consisted of nano-silica particles and N -CDs dispersion, where nano-SiO 2 particles were innovatively added to improve the abrasion resistance of the coating. After the superhydrophobic modification by 1 H ,1 H ,2 H ,2 H -perfluorooctyltriethoxysilane (PTES), the coating exhibited a water contact angle (WCA) of 154° and a rolling angle (RA) of 7°. The analysis undertaken via potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) demonstrated improved electrochemical performance for the coated magnesium alloy samples when compared with uncoated counterparts. The assemblies formed by the coordination of Mg 2+ with the functional groups of N -CD (−NH 2 , –COOH and –OH) were electrodeposited onto the surface of the magnesium alloy matrix, achieving a dense protective film and thereby slowing down the corrosion rate. At the same time, the abrasion resistance test results indicated that the prepared coating possessed excellent abrasion resistance, possessing the ability to resist damage to the coating caused by friction to a certain extent, proposing a new idea for fabricating superhydrophobic coatings with increased abrasion resistance on Mg alloys.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
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IF 7.7
Jiayi Qu,Yujun Guo,Xingtai Chen,Hongsen Xie,Shuheng Ding,Haoyun Zhao,Xiaoning Wang,Davoud Dastan,Xi-Tao Yin,Xiaoguang Ma
This paper reports the first hydrothermal synthesis of Nd-doped (1–4 mol%) CdS gas sensor materials. After gas sensitivity testing, it was found that sensors doped with 3 mol% performed best in detecting n-butanol gas at 275 °C: the response to 100 ppm n-butanol reached 127 (approximately 3.34 times that of pure CdS), Compared with common VOC gases in daily life, the sensor has good selectivity for n-butanol, with an extremely fast recovery time (3 s). It also demonstrated extremely high detection accuracy (R² = 0.96857) across a concentration range of 10–300 ppm n-butanol, along with excellent humidity resistance and long-term stability. Characterization of the material was conducted using XRD (X-ray diffraction), SEM (scanning electron microscope), TEM (transmission electron microscope), and XPS (X-ray photoelectron spectroscopy), revealing the following reasons for the enhanced gas-sensing performance: 1. Nd³ ⁺ doping causes lattice distortion, forming a highly active region around the sulfur vacancy and enhancing the gas-vacancy electron exchange efficiency. 2. Lattice distortion inhibits grain growth (≈26.85 nm), providing more gas adsorption/reaction sites and significantly improving the response value. reaction sites, significantly improving the response value. 3. Nd³ ⁺ reduces the adsorption energy of n-butanol, promoting gas adsorption/reaction processes while accelerating desorption. This paper provides materials with practical application value for sensors used in n-butanol detection.
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JOURNAL OF FOOD SCIENCE
·
2025
·Vol. 90
·期 7
·e70373
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IF 3.4
Jingyu Lu,Liyang Zhou,Chang Liu,He Qian
Obesity is often associated with dysregulated glycerophospholipid metabolism. Lycopene is known for its anti-obesity properties. However, the mechanism by which lycopene affects glycerophospholipid metabolism in obesity remains unclear. Here, a lycopene small intestinal sustained-release system (SR-Ly) was designed. Subsequently, SR-Ly was used to interfere with fatty liver caused by high-fat diet in mice. SR-Ly exhibited high encapsulation efficiency, stability, and sustained release, significantly enhancing lycopene's bioavailability. Moreover, treatment with SR-Ly resulted in reduced body weight gain in obese mice. Lipidomic analysis revealed significant modulation of glycerophospholipid pathways with lycopene increasing beneficial glycerophospholipids. Correlation-based analysis further suggested that lycopene may promote the conversion of N-acyl phosphatidylethanolamine to N-acylethanolamines (NAE), highlighting a possible metabolic route of interest. Structural equation modeling supported the association between lycopene intervention and improved glycerophospholipid metabolism. Additionally, compared to lipid oxidation, it was verified at both the gene and protein levels that lycopene has a greater positive effect on lipid synthesis in the mouse liver. Hence, SR-Ly is a promising therapeutic approach for fatty liver, effectively targeting glycerophospholipid metabolism. Practical Application SR-Ly enhanced lycopene's stability, bioavailability, and sustained release. SR-Ly reduced body weight gain and modulated glycerophospholipid metabolism. Lycopene promoted N-acyl phosphatidylethanolamine conversion to N-Acylethanolamines. Lycopene improved glycerophospholipid metabolism, favoring lipid synthesis over oxidation.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
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IF 9.7
Limin Wang,Zhenxiang Chen,Yongchun Liu,Nifei Shi,Yanni Wu,Yifan Jiang,Jiacheng Luo,Xinglan Peng,Youjun Fan,Wei Chen,Du-Hong Chen
Despite excellent charge-discharge performance in carbon-based supercapacitors, their mechanisms across pH solutions remain unclear due to difficulties decoupling capacitive effects from porous structures and intricate micro-nano molecular/ionic channels. To investigate these mechanisms, we electrochemically synthesize structure-defined, nanohole-free N-doped graphene (ENG) as a model system. Attenuated total reflection in situ infrared spectroscopy (ATR-FTIR) reveals splendid electrochemical activity for pyridinic N and carboxyl functional groups in acidic medium. In contrast, hydroxyl groups dominate the charge-discharge behavior of ENG in alkaline medium. This behavior differs from the neutral medium scenario, where only C O bonds produce detectable ATR-FTIR peaks. Theoretical calculations identified strong adsorption affinity of pyridinic N and carboxyl functional groups for H + over OH − , which directly enhances the electrochemical activity of ENG in acidic medium. This work pioneers a targeted synthesis strategy for ENG, establishing it as a robust model to decode charge-discharge mechanisms of carbon-based materials across the full pH range.
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PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2025
·
IF 4.9
Huan Huan,Wei Wu,Qingyi Feng,Yongliang Tang,Sean Li,Hongxiang Deng,Xia Xiang,Xiaotao Zu,Yangfang Li
Wrinkled graphene prepared by the bubbling chemical vapor deposition method was ball milled to produce active materials for lithium-ion battery anode. By controlling milling parameters, the graphene with optimum electrode performance was obtained. After 2000 cycles at a current of 2000 mA g −1 , the reversible specific capacity can be maintained at 213.04 mAh g −1 , with a retention rate of 150.61 %. It was found that two lithium storage mechanisms coexist in this graphene material, and their capacitive control plays a major role, for example, accounting for 75.87 % contribution at a voltage scan rate of 0.8 mV s −1 . To further improve the electrode performance, B and N co-doped graphene was also prepared through ball milling. The results showed that, at the current of 2000 mA g −1 , the reversible specific capacity after 2000 cycles could reach 225.59 mAh g −1 , which was 5.9 % higher than that of the undoped one.
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ChemCatChem
·
2025
·
IF 3.9
Xinquan Wu,Zhen Sun,Hao Li,Xiaolei Guo,Zhen-Feng Huang,Ruijie Gao,Chengxiang Shi,Xiangwen Zhang,Lun Pan,Ji-Jun Zou
Platinum-based catalysts are highly effective for the oxygen reduction reaction (ORR), but their prohibitive cost and insufficient activity impede large-scale commercialization. Herein, we report a Pt@Fe-NC electrocatalyst synthesized by depositing uniform platinum nanoparticles onto an iron–nitrogen–carbon (Fe–NC) support via an ethylene glycol reduction method. The Fe–NC support, prepared from an iron (II)-1,10-phenanthroline complex precursor to ensure high iron utilization, modulates the electronic structure of the Pt nanoparticles, thereby enhancing both catalytic activity and stability. The optimized Pt@Fe-NC catalyst (13.54 wt% Pt) exhibits exceptional ORR performance in acidic media, with a half-wave potential of 0.852 V and notable stability. When integrated into a zinc-air battery, the catalyst delivered a high specific capacity of 652.66 mAh g Zn −1 . Furthermore, a proton exchange membrane fuel cell (PEMFC) employing this catalyst achieved a high open-circuit voltage (OCV) of 0.964 V and a peak power density of 1.722 W cm −2 , outperforming most previously reported Pt-based catalysts. This study highlights a synergistic strategy between Pt nanoparticles and metal-nitrogen-carbon (M–N–C) supports to boost ORR performance, presenting a viable path toward advanced, cost-effective catalysts for energy conversion devices like PEMFCs and zinc-air batteries. Graphical A method of preparing Fe–NC loaded Pt nanoparticle catalysts is presented. The method is used to prepare Fe–NC substrate by loading iron complexes with 1,10-phenanthroline on carbon black and then Pt nanoparticles obtained by ethylene glycol reduction method are loaded on the Fe–NC substrate. The results show that the enhanced activity of the Pt@Fe-NC catalyst is due to the modification of the electronic structure of Fe on Pt in the Fe-NC support.
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OPTICAL MATERIALS
·
2025
·
IF 4.2
Liangmiao Zhang,Changzheng Pan,Hao Zeng,Kailin Han,Yanfeng Gao
Nickel oxide (NiO), an electrochromic (EC) material, has been extensively used in various fields such as smart energy-saving windows, intelligent displays, and anti-counterfeiting technologies. However, crystalline NiO exhibits some drawbacks that hinder its practical applications. In this research, we successfully synthesized amorphous and porous C/N-doped NiO films through a two-step process. The process involved the formation of a complex between acetate tetrahydrate and monoethanolamine, followed by spray coating and calcination. The resultant C/N-doped NiO films demonstrated exceptional EC properties, including a high optical modulation of 57.7 % at 500 nm, rapid coloration and bleaching times of 7 and 11 s, respectively, and an ultra-high coloring efficiency of 108.2 cm 2 /C. Furthermore, the films exhibited remarkable cycling stability, maintaining a transmittance of 63.1 % after 500 cycles. Notably, when applied to smart windows, these films reduced the temperature of room center by 14.3 °C compared to traditional double-glazed windows. This study introduces a promising material for EC smart windows and display applications, advancing the field beyond previously reported methods.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qiang Hu,Tongqing Chen,Lingling Yan,Junhui Yi,Hongxin Cai,Liang Chen,Lingli Wang
A series of Nd 2 O 3 -decorated ZnO nanosheets were successfully synthesized through a facile hydrothermal approach for n-butanol sensing applications. The results demonstrate that Nd 2 O 3 modification significantly improves the sensing performance. The optimal sensor with 7.5 wt% Nd 2 O 3 loading (denoted as Nd2) achieves a high response of 1503.73 toward 100 ppm n-butanol (68 times higher than that of pure ZnO), along with a rapid recovery time of 3 s and a low detection limit of 500 ppb. Furthermore, the sensor exhibits excellent selectivity against common volatile organic compounds (VOCs) and long-term stability. Comprehensive performance analyses reveal that the performance enhancement originates from the synergistic effect of two fundamental mechanisms: the formation of Nd 2 O 3 /ZnO heterojunctions that effectively modulate the electron-depletion layer, and the increased oxygen vacancy concentration that promotes surface redox kinetics. This work not only highlights the application potential of Nd 2 O 3 /ZnO heterostructures in n-butanol detection, but also provides a feasible material design strategy for developing high-performance gas sensors.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Shiyu Sun,Bin Lu,Hongxun Hao,Jiangna Xing,Zijian Zhou,Xue Bai,Khadija Tabassum,Na Wang,Ting Wang,Xin Huang
Band engineering has garnered significant attention for its role in tailoring the band structures of g-C3N4, which is crucial for enhancing the light collection and conversion processes. In this paper, a novel visible-light-driven g-C3N4 was synthesized by a simple and efficient thermal polymerization method, and the morphology and bandgap were modulated by incorporating a high electronegativity oxygen element (O). Scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), X-ray powder diffraction (XRD), etc., were applied to analyze the morphology and chemical structure of the samples and the photogenerated charges separation performance was also investigated by ultraviolet–visible diffuse reflectance spectroscopy (UV–vis DRS), electrochemical impedance spectroscopy (EIS), etc. Besides, tetracycline (TC) photodegradation efficiency was tested, and the results show that the reaction rate constant and removal rate of MG0.002 are 0.0933 min–1 and 81.6% (within 60 min), and the recyclability and adaptability are excellent. Moreover, the mechanism of O regulatory was studied by element analyzer (EA) and X-ray photoelectron spectroscopy (XPS), and the results indicate that sp2-hybridized N atoms are preferentially replaced by O atoms in the MG0.02 structure. Finally, the TC degradation enhancement mechanism was investigated and the results indicated that the electrons were redistributed due to the influence of high electronegativity oxygen, which can not only generate midgap states and promote the visible light absorption, but also realize the effective transfer and separation of photogenerated carriers, thus significantly improving the photocatalytic activity.
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