INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Peng Wei,Xin Ye,Jianhua Jiao,Fan Wu,Haodong Zhang,Shaoyang Wu,Shanshan Lv,Qirui Liang,Yurong Ren
Iron phosphide (FeP) has garnered significant attention due to its abundant iron reserves, low cost and impressive hydrogen evolution reaction (HER) activity. Nevertheless, sluggish charge transport, large particle size and poor oxygen evolution reaction (OER) activity make it still difficult to meet the desired practical applications. As we know, heterogeneous element doping, porous two-dimensional structure design, and nanoconfinement control can effectively improve the mass/charge transfer rate and expose more active sites. Hence, ultra-small bimetallic iron-cobalt phosphide nanoparticles encapsulated and dispersed in two-dimensional nitrogen-doped carbon nanosheet (FeCoP@NC) catalysts were successfully constructed. The optimized FeCoP@NC shows outstanding electrocatalytic stability and activity toward OER and HER under alkaline conditions. The overall water splitting performance was further measured by using FeCoP@NC as both anode and cathode, which also delivers good performance indicators. This work provides a new perspective and potential value for the rational design of non-precious metal bifunctional catalysts.
✓ 已验证
产品关联
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Yajie Ding,Hua Ma,Chaoze Ji,Dingxiang Wei,Hongzhou Shang,Lihua Liu,Ning Qiao
A pH and temperature dual-responsive KGM/P(NIPAM-CA) hydrogel drug carrier was prepared by using natural polysaccharide konjac glucomannan (KGM), pH-sensitive monomer crotonic acid (CA), and temperature-sensitive monomer N-isopropylacrylamide (NIPAM). The effect of mass ratio of NIPAM to KGM on the properties of KGM/P(NIPAM-CA) hydrogels was studied by a range of testing methods. The drug loading and release properties of KGM/P(NIPAM-CA) hydrogel were investigated using 5-fluorouracil (5-FU) as a model drug. Results show that KGM/P(NIPAM-CA) exhibits good swelling and mechanical properties determined by its composition. As a drug carrier KGM/P(NIPAM-CA) hydrogel demonstrated a maximum encapsulation efficiency of 30.17% and a maximum drug loading capacity of 54.41% for 5-FU at 25°C. In simulated colonic fluid (SCF) at 25°C, the cumulative drug release rate of KGM/P(NIPAM-CA) reached 58.86% within 48 hours, which was 1.8 times higher than that in simulated gastric fluid (SGF). Furthermore, the hydrogel demonstrated biocompatibility, with a hemolysis rate of less than 3% and a cell viability exceeding 90%. These results establish KGM/P(NIPAM-CA) as a promising, biocompatible platform for stimuli-responsive, colon-targeted drug delivery.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Jingfang Zhang,Jiangping Ran,Weishang Jia,Xinxiu Yan,Lanxiang Feng,Wei Zou,Yaoyue Yang,Liping Wang
Lithium metal batteries (LMBs) are recognized as one of the most promising next-generation energy storage systems due to their exceptionally high energy density and relatively low cost. However, the inevitable growth of lithium dendrites remains a critical challenge. Electrolyte additives have emerged as a straightforward and effective strategy for anode modification. Among these, nitrate salts (particularly LiNO 3 ) have been widely employed to suppress the polysulfide “shuttle effect” in lithium‑sulfur (Li S) batteries while enhancing Coulombic efficiency (CE). Nevertheless, the underlying reaction mechanisms remain insufficiently understood. To guide the rational design of high-performance electrolyte additives, this study systematically investigates the synergistic effects of different cationic nitrate additives (K + , Na + ) and N O bond anions (NO 3 − , NO 2 − ) on Li deposition behavior. The results demonstrate that NO 3 − can effectively participate in the Li + solvation process, facilitating the formation of an inorganic-rich, high-quality solid electrolyte interphase (SEI). In contrast, although NO 2 − exhibits stronger adsorption energy with both Li + and the Li (110) surface, which enables more uniform lithium deposition, it fails to construct a stable SEI structure. Furthermore, cations demonstrate distinct synergistic interactions with N O anions during electrochemical processes, significantly influencing Li + deposition kinetics. This work provides fundamental insights into the mechanistic roles of K + /Na + -based nitrate and nitrite additives in LMBs. Additionally, a novel characterization approach utilizing conventional transmission electron microscopy (TEM) is proposed to evaluate SEI quality, providing a practical tool for interfacial analysis. These findings present valuable guidelines for designing advanced electrolyte additives and controlling Li deposition behavior in high-energy-density battery systems.
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 8
·5263-5280
·
IF 4.9
Han Qiuxia,Xu Yanmeng,Zhao Qian,Wang Shiwei,Zhang Chunzhe,Zhang Qiang,Wang Fei,Bai Yu,Chen Yong
The study reports a tactic for superior antibacterial performance on cotton via synergism of complementary functionalities of quaternary ammonium salt and malonylurea-based N -chloramine combined in a silane. Knoevenagel Condensation between 4-(chloromethyl)benzaldehyde and malonylurea formed a product whose chloromethyl group was used to quaternize tertiary amine of N , N -dimethylethanolamine. The O − H of the quaternization product was subsequently alcoholyzed with Si − H of trimethoxysilane. The methoxysilyl groups of the alcoholysis silane were hydrolyzed to silanol ones that condensed with either their own kind or hydroxy groups of cellulose to polymerize into a crosslinked polysiloxane finishing on cotton. Upon chlorination of malonylurea-based N − H bonds, each repeating unit of the polysiloxane has one quaternary ammonium salt and two imide N -chloramine sites. Antibacterial assays against Staphylococcus aureus and Escherichia coli proved that the synergism of quaternary ammonium salt and N -chloramine, a higher efficacy and a broader spectrum arising from their complementary elimination mechanisms and physiochemical features. Biocidal stability and rechargeability of the polysiloxane finishing were both promising due to the robust and hydrophobicity of silicone backbone and the sturdy cyclic N -chloramine. This research presented a general approach for generation of super biocidability on substrates that can react with hydroxy group using silanes to carry complementary functionalities. Graphical abstract
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Zihao Qiu,Gerile Naren,Rui Meng,Rui Liang
Rare-earth metal complexes have received wide attention for their excellent photo-physical properties and their light absorption capacity and energy transfer efficiency of organic ligands, which are the main factors affecting the photoluminescence of rare-earth metal co-mplexes. Therefore, in this study, four N -acyl amino acid praseodymium complexes, (Pr[CH 3 (CH 2 ) n CONHCH(CH 3 )COO] 3 , n = 4,6,8,10) with different carbon chain lengths were synthesized using H(hex-ala), H(oct-ala), H(dec-ala) and H(dod-ala) ligands and the Pr 3+ reaction method with the goal to obtain rare earth metal-organic complexes with good optical properties . The molecular structure of the praseodymium complexes was determined using CHN elemental analysis , 1 H NMR , and FT-IR spectroscopic analysis . Solubility tests in pure solvents have determined that Pr(oct-ala) 3 and Pr(dec-ala) 3 are highly soluble in polar solvents . However, Pr(dod-ala) 3 , which contains a long carbon chain and crystallizes easily, has a low solubility. The photophysical properties of the praseodymium complexes can be obtained by fluorescence spectroscopy in the visible region, which shows that the luminescence of the four praseodymium complexes occurs in the blue region, and the fluorescence lifetimes are about 0.32 μs. The effect of temperature change on the luminescence properties of the praseodymium complexes was analyzed by variable-temperature fluorescence spectroscopy . The fluorescence inte-nsity of Pr(dec-ala) 3 , which is more absorbent, is higher in the range of 25 °C–70 °C. The luminescence properties of praseodymium complexes in the near-infrared region were obtained by near-infrared emission spectroscopy , and three major emission intensities were found at 926 nm ( 1 D 2 → 3 F 2 ), 1001 nm ( 1 D 2 → 3 F 4 ), and 1376 nm ( 1 D 2 → 1 G 4 ), among which the intensity of the emission peaks of Pr(dod-ala) 3 was the strongest at 1001 nm, indicating a good match between the ligand-centered triplet state of Pr 3+ and the 1 D 2 emission state. In addition, in this study, the molecular structure of praseodymium complexes was geometrically optimized by density functional theory (DFT) method using Gaussian software, and the bond strengths and topological properties of the praseodymium complexes were obtained by Atoms in Molecules (AIM) theory analysis. The results show that there are closed-shell interactions between the ligand and Pr 3+ , in which Pr(oct-ala) 3 has the largest Pr–O bond strength among the complexes with different carbon chain lengths.
✓ 已验证
产品关联
DOI
高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2025
·
IF 1.8
Ye Xing,Ya-nan Wang,Shimin Dang,Weichuang Ye,Hai-chao Li
In this paper, N-doped carbon nano-hollow cubes (CNHCs) were successfully prepared for the first time by a salt separation strategy, which breaks through the morphological limitations of traditional hollow structures such as spherical or tubular. This study combines β-cyclodextrin (β-CD) with CO(NH2)2 to exploit the high-temperature stability of NaCl crystal. Precise modulation of the material morphology was achieved by high-temperature carbonisation (700 °C) of the self-assembled precursor and subsequent aqueous washing to remove the salt template. This study provides a novel salt separation strategy for the morphology design and functionalisation of carbon nanomaterials and expands the preparation of complex hollow structures.
✓ 已验证
产品关联
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2014
·Vol. 4
·期 1
·1-11
·
IF 5.078
Qu Dan,Zheng Min,Zhang Ligong,Zhao Haifeng,Xie Zhigang,Jing Xiabin,Haddad Raid E.,Fan Hongyou,Sun Zaicheng
Photoluminescent graphene quantum dots (GQDs) have received enormous attention because of their unique chemical, electronic and optical properties. Here a series of GQDs were synthesized under hydrothermal processes in order to investigate the formation process and optical properties of N-doped GQDs. Citric acid (CA) was used as a carbon precursor and self-assembled into sheet structure in a basic condition and formed N-free GQD graphite framework through intermolecular dehydrolysis reaction. N-doped GQDs were prepared using a series of N-containing bases such as urea. Detailed structural and property studies demonstrated the formation mechanism of N-doped GQDs for tunable optical emissions. Hydrothermal conditions promote formation of amide between –NH 2 and –COOH with the presence of amine in the reaction. The intramoleculur dehydrolysis between neighbour amide and COOH groups led to formation of pyrrolic N in the graphene framework. Further, the pyrrolic N transformed to graphite N under hydrothermal conditions. N-doping results in a great improvement of PL quantum yield (QY) of GQDs. By optimized reaction conditions, the highest PL QY (94%) of N-doped GQDs was obtained using CA as a carbon source and ethylene diamine as a N source. The obtained N-doped GQDs exhibit an excitation-independent blue emission with single exponential lifetime decay.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Liwei Su,Jing Zhan,Qihang Gu,Huan Chen,Lianbang Wang,Yuanhao Wang,Qing Hu,Manman Ren
Nickel foam (NF) is the most commonly-used current collector for supercapacitors due to open porous structures, good electrical conductivity, and excellent mechanical toughness. However, its insufficient specific surface area (SSA) and surface trace O affect the nucleation, nanostructures, and mass loadings of active materials, severely limiting the mass- and area-specific energy densities of electrodes. Therefore, it is of vital importance to achieving a higher SSA and preferred chemical composition. This work proposes a novel route to modify the surface with an N-doped carbon nanolayer (about 50 nm thick, ~1 wt% of the NF) and studies its influence on the morphology regulation and capacitive performance of NiCoMn-based carbonate hydroxide (as a case study). The preparation, chemical composition, and microstructure of the nanolayer are studied in depth. The morphology evolution of the carbonate hydroxide refers to shapes (from needles to flakes), flake thicknesses (5.2–18.4 nm), and mass loadings (0.8–6.0 mg cm −2 ). The optimized nanoflake delivers twice mass-specific capacitance and 4.5-folds area-specific capacitance of the nanoneedle at 1.0 A g −1 in aqueous electrolytes. The reversible capacitance is 1818F g −1 (909C g −1 ) at 10 A g −1 , with 95% retention after 10,000 cycles. The solid-state asymmetric capacitor offers a maximum energy density of 91.22 Wh kg −1 at a power density of 400 W kg −1 that is highly competitive related to reported works.
✓ 已验证
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 3
·1403-1412
·
IF 2.4
Yu Chujie,Liu Baoyang,Li Mingzhu,Ding Xuli
Sodium-ion battery is evolving into a desirable alternative technology to lithium-ion batteries, thanks to its wide material distribution and low cost. Tin-antimony oxide is gaining research interest as a sodium-ion battery anode material owing to its ideal theoretical specific capacity, environment friendly, and low cost. However, because of the inner nature of poor electrical conductivity of oxides and slow ionic diffusion kinetic, the electrochemical performance of tin-antimony oxides (SSO) differs significantly from the theoretical value of merit. In this paper, we demonstrated N-doping porous carbon fibers encapsulated Sn/Sb@Sb 2 SnO 5 composite (Sn/Sb@Sb 2 SnO 5 @PCFs-N) material. Through the use of a simple electrostatic spinning technique, the Sn and Sb nanocrystalline were in situ generated around the SSOs in a specific way, and the N-doping in the fabricated porous carbon fibers can modulate the charge transport in the fabricated composite. The unique structure can successfully increase the electrical conductivity and the specific capacity of the fabricated composite. Using as anode for Na + ions storage, the fabricated composite delivers high specific capacity and good cycling stability and rate capability, showing a high capacity of 450 mAhg −1 at 50 mAg −1 current density even after 100 cycles. The better rate capability can be sustained even when the current raised up to 500 mA g −1 . This current work can offer a perspective on the effect of phases modified and doping on the functionality of materials for the next-generation high-specific energy sodium-ion battery.
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Jieting Ding,Shan Ji,Hui Wang,Vladimir Linkov,Hengjun Gai,Fusheng Liu,Quanbing Liu,Rongfang Wang
Water electrolysis offers a promising approach toward future sustainable energy mix utilizing hydrogen as energy carrier. Bifunctional catalyst which is active in both oxygen and hydrogen evolution reactions can significantly enhance total electrochemical water splitting efficiency and simplify electrolysis systems. In this study, nitrogen doped nickel-containing porous carbon networks were prepared to fulfill this role. Peptone was used as carbon and nitrogen source during the synthesis and NaCl presence as a template resulted in the formation of open mesopores interconnected by thin carbon sheets with nanosized Ni particles encapsulated in the carbon matrix. A low onset potential of 53 mV and a charge transfer resistance of 3.8 Ω with excellent cycling stability were demonstrated when the optimized catalyst Ni-2 was applied in HER. It was also shown that Ni-2 onset potential, charge transfer resistance, and durability in OER were comparable to those of a commercial RuO2 catalyst. During the electrolysis study conducted at 10 mA cm–2, Ni-2 maintained a cell voltage of 1.63 V with remarkable stability during 25 h operation.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）