PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Yuhan Zhang,Nan Xiao,Yanjing Gao,Fang Sun
This study introduces a novel p -diethylene glycol monomethyl ether cinnamyl formamide-based disulfide monomer , N,N′ -(disulfanediylbis(2,1-phenylene)) bis(4-(4-(2-(2-methoxyethoxy)ethoxy) phenyl)-2-oxobut-3-enamide) (Mp-BSCF), designed to reduce the volume shrinkage of photosensitive resins and initiate monomer polymerization under 455 nm LED light irradiation. The photochemical properties and photoinitiation efficiency of Mp-BSCF are systematically investigated using UV–vis absorption spectroscopy , electron paramagnetic resonance (EPR) and real-time infrared spectroscopy . Although its weak absorption around 455 nm, Mp-BSCF can generate arylthiyl radicals under 455 nm LED irradiation, and then effectively initiate the polymerization of triethylene glycol dimethacrylate (TEGDMA)/A glycerolate dimethacrylate (Bis-GMA) system. Increasing Mp-BSCF addition enhances the final double bond conversion and maximum polymerization rate of the TEGDMA/Bis-GMA system, reaching up to 82.0 % and 2.02 % s −1 , respectively. Notably, Mp-BSCF significantly reduces the volume shrinkage of the photopolymerization system, with the addition of 10 % Mp-BSCF resulting in a 50 % reduction compared to the control system. This reduction is attributed to the dynamic reversible nature of the S S bond “breaking-recovery” and the intermolecular hydrogen bond interaction. Additionally, Mp-BSCF improves the thermal stability, friction resistance, and hardness of the TEGDMA/Bis-GMA photopolymerization system.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Zhangxin Xu,Mingyang Liu,Shuting Zhang,Jinlong Zou,Baojiang Jiang
Rechargeable/flexible zinc-air batteries (ZABs) show great potential for energy storage, yet cathode catalysts currently used lack durability under harsh conditions. Thus, rational catalyst design and the protection of the primary active site in these environments are critical. Here, we have developed an innovative catalyst by encapsulating the Co/Co 3 Fe 7 alloy heterojunction within a N, P co-doped multifunctional carbon nano-armor (Co/Co 3 Fe 7 @PNCNT), employing both armor protection and heterojunction engineering strategies. The formation of the Co/Co 3 Fe 7 heterojunction can adjust the d-band center and induce a local electric field effect to promote ORR (oxygen reduction reaction)/OER (oxygen evolution reaction) activity. The tubular carbon nano-armor effectively prevents metal particle aggregation, corrosion, and ensures long-term stability in strongly alkaline environments. Co-P bonds construct atomic-level electron transfer channels between the metal heterojunction as well as the nano-armor, accelerating charge transfer to promote ORR/OER reaction kinetics. Density functional theory calculations also confirm the construction of an internal electric field at the Co/Co 3 Fe 7 interface and the adjustment of the d-band center via the heterojunction formation. The Co/Co 3 Fe 7 @PNCNT-based rechargeable/flexible ZABs has excellent power density and ultra-long-term cycling stability (1730 h). It exhibits great potential in large-scale energy storage, portable electronics and wearable devices. This work provides a new design route for the precise construction of multifunctional nano-armor and heterojunctions.
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jingru Zhang,Guangxin Yang,Junyu Zhang,Cong Kong,Jun Wang
The misuse of sulfonamide and fluoroquinolone antibiotics leads to pollution of the water environment, necessitating the development of cost-effective and efficient degradation methods. This article presents a one-step hydrothermal method (200℃, 8 h) for the preparation of Fe-N-co-doped biochar/carbon quantum dots (Fe/N/BC/CQDs) as a photocatalytic material. The Fe/N/BC/CQDs was employed for the activation of H 2 O and O 2 , facilitating the degradation of sulfonamide and fluoroquinolone antibiotics, with superoxide radicals, photo-generated holes, hydroxyl radicals, and singlet oxygen dominated the photodegradation process. Under 1 h dark and 8 h natural light conditions, the degradation efficiency of norfloxacin, sulfathiazole, sulfamethoxazole, sulfamonomethoxine, sulfadoxin, sulfamethazine (10 mg/L) by Fe/N/BC/CQDs ranged from 74.21 % to 89.23 %. The potential degradation pathways of sulfonamide and fluoroquinolone antibiotics were proposed based on ultrahigh-performance liquid chromatography tandem high-resolution mass spectrometry analysis of the intermediates. The Fe-N-doped biochar’s hierarchical pore structure enhances synergistic adsorption-catalysis effects, while the incorporated carbon quantum dots (CQDs) broaden solar spectrum utilization, effectively overcoming the high-intensity light dependency common to conventional photocatalysts. Efficient charge separation was achieved through the formation of a p-n heterojunction between Fe-N-co-doped biochar and CQDs. Additionally, the applicability of Fe/N/BC/CQDs in real water systems was confirmed, providing valuable insights for the construction of p-n heterojunction structures to degrade organic pollutants in water.
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高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Zheng Zhou,Zhao Zhang,Qilong Zhang,Hui Yang,Yulu Zhu,Yuanyu Wang,Lu Chen
Piezoelectric nanogenerators (PENGs), as a promising solution to harvest mechanical energy from ambient environment, have attracted much attention over the past decade. Here, the core–shell structured BaTiO3@Carbon (BT@C) nanoparticles (NPs) were synthesized by a simple surface-modifying method and then used to fabricate the efficient PENGs with poly[(vinylidene fluoride)-co-trifluoroethylene] (P(VDF-TrFE)). The carbon shell with the uniform thickness of 10–15 nm can increase the content of the polar β phase in P(VDF-TrFE) and significantly enhance the interfacial polarization between BT NPs and the polymer matrix during the poling process. Out of all compositions, the 15 wt % BT@C/P(VDF-TrFE) PENG exhibited the optimal piezoelectric performance with an output voltage of ∼17 V and a maximum power of 14.3 μW under bending–releasing mode. More importantly, the PENG can also efficiently harvest other types of mechanical energy from human activities and exhibits stable output after 1500 bending–releasing cycles. When the PENG was bent and beat by bicycle spokes, a peak voltage of 16 V was generated, which can light up 12 white LEDs directly and charge the commercial capacitors. Our research provides a new strategy to fabricate flexible and efficient PENGs from a nanoscale viewpoint; it can be hopefully applied in energy-harvesting systems and wearable electric sensors.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiaojun Wang,Haichang Li,Changmeng Xu,Hongran Sun,Cheng Fan,Wenming Song,Huifang Li,Jiangshan Gao,Zhiming Liu,Yan He
Sodium-ion batteries (SIBs) have attracted widespread attention because of the economic benefit of low-cost and abundance of sodium resources. Iron-based electrodes (sulfide, selenide and phosphide) that operate through conversion mechanism have shown huge potential for excellent sodium-ion storage. However, the problems related with serious volume expansion and lack of general synthesis methods of iron-based materials shorten the cycle life and hindered their application in SIBs. Herein, a general synthetic strategy of electrospinning process was developed to achieve the yolk-shelled Fe x Q y @C (Q = S, Se and P) film for binder-free anode of high-performance SIBs. Such method has more precursor materials to choose from and is highly scalable. More importantly, the designed electrodes have a unique yolk-shell structure and a three-dimensional conductive network. When applied as a binder-free anode of SIBs, all three samples exhibit outstanding sodium storage performance (FeS 2 @C-40: remaining 280 mAh g −1 after 400 cycles at 1 A g −1 , Fe 7 Se 8 @C-40: remaining 186.5 mAh g −1 after 200 cycles at 0.1 A g −1 and FeP 4 @C-40: remaining 205 mAh g −1 after 1000 cycles at 0.5 A g −1 ). Therefore, the scalability and universality of this general synthetic strategy can open up a new direction for the exploration of high-energy density and flexible electrode materials.
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高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 5
·3249-3264
·
IF 5.044
Sun Ling,Xie Yutong,Wu Jiamin,Wang Huixin,Wang Shihao,Li Wennan,Zhang Jiaojiao,Zhang Zheng,Zhu Ping,Lu Zhou,Dong Chaohong
A novel flame retardant containing phosphorus and nitrogen elements, ammonium salt of N,N-dimethylene p-benzenesulfonic phosphonic acid (ADBSPA), was prepared by one-step continuous chemical method. The chemical structure of the ADBSPA was determined by nuclear magnetic resonance spectrum (NMR) and Fourier transform infrared (FTIR), and ADBSPA was processed onto cotton materials by immersion method. The flame retardancy of coated cotton materials was analyzed by limiting oxygen index (LOI) and Vertical burning test. The LOI value of cotton coated with 350 g/L ADBSPA increased from the original 18.2 ± 0.2% to 31.7 ± 0.2%, and the damaged length of this sample reduced to 6.6 ± 0.1 cm, which proved that ADBSPA enhanced the anti-burning ability of cotton materials. Cone calorimetry was used to evaluate the combustion behavior of cotton materials before and after coating. Compared with original sample, ADBSPA changed the combustion path of cotton materials, and the intuitive performance was that the ADBSPA-cotton-4 reserved 25.1 ± 0.5% of char residue at 250 s, and its peak heat release rate (PHRR) greatly reduced to 17 ± 1 kW/m 2 . The surface morphology of uncoated and coated cotton materials was characterized by scanning electron microscopy (SEM). It was observed that the coated sample still maintained a complete fiber skeleton after burning. In addition, thermogravimetric (TG) analysis confirmed that the coated cotton materials had good thermo-oxidative and thermal stability. All results pointed out that the phosphorus and nitrogen elements contained in ADBSPA as well as cotton cellulose constituted the three basic conditions of intumescent flame-retardant system. The polyphosphoric acid compounds formed by phosphorus element at high temperature promoted the dehydration of cotton fibers into char layer. The non-flammable gases produced by the nitrogen element in the combustion process covered the surface of fabrics, thereby playing the role of shielding heat and diluting combustible gases. Graphic abstract A novel phosphorus-nitrogen flame retardant was prepared by one-step continuous chemical method and applied to improve the thermal stability and anti-flammability of cotton materials.
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高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Yin Yanyou,Zhang Yu,Liu Nannan,Sun Bing,Zhang Naiqing
Biomass-derived approaches have been accepted as a practical way for the design of transitional metal phosphides confined by carbon matrix (TMPs@C) as energy storage materials. Herein, we successfully synthesize P/N-co-doped carbon nanosheets encapsulating Cu3P nanoparticles (Cu3P@P/N-C) by a feasible aqueous reaction followed by a phosphorization procedure using sodium alginate as the biomass carbon source. Cu-alginate hydrogel balls can be squeezed into two-dimensional (2D) nanosheets through a freeze–drying process. Then, Cu3P@P/N-C was obtained after the phosphorization procedure. This rationally designed structure not only improved the kinetics of ion/electron transportation but also buffered the volume expansion of Cu3P nanoparticles during the continuous charge and discharge processes. In addition, the 2D P/N co-doped carbon nanosheets can also serve as a conductive matrix, which can enhance the electronic conductivity of the whole electrode as well as provide rapid channels for electron/ion diffusion. Thus, when applied as anode materials for sodium-ion batteries, it exhibited remarkable cycling stability and rate performance. Prominently, Cu3P@P/N-C demonstrated an outstanding reversible capacity of 209.3 mAh g−1 at 1 A g−1 after 1,000 cycles. Besides, it still maintained a superior specific capacity of 118.2 mAh g−1 after 2,000 cycles, even at a high current density of 5 A g−1.
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PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Tian-Hong Jing,Kai-Chun Zhao,Guang-Hui Shi,Yi-Ying Zhuang,Xiao-Chao Chen,Xiao-Li Zhao,Yong Lu,Ye Liu
A series of bis-P,O-hybrid ligands ( L1–L4 ) were synthesized and characterized. The crystal structures demonstrated that the ligand of L2 , 1,4-bis((2-(diphenylphosphaneyl)phenoxy)methyl)benzene, not only acted as a typical trans -positioned diphosphine as observed in the complexes Pd( L2 )(OAc) 2 and Pd( L2 )Cl 2 , but also potentially as a P,P,O-tripodal pincer. As a result, under mild conditions (80 °C, 0.5–3.0 MPa), L2 enabled Pd(OAc) 2 to exhibit remarkable performance in terms of high activity and excellent regioselectivity ( l / b > 97/3) in the alkoxycarbonylation of vinyl arenes with the isolated yields of 57–91 %.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Yan Gong,Xiaofeng Wu,Xinyuan Zhou,Xiaofei Li,Ning Han,Yunfa Chen
The typical core-shell Pt@ZnO, 1 mol% Ga doped Pt@ZnO and 2 mol% Ga doped Pt@ZnO nanoparticles were synthesized and utilized in acetone and NO 2 sensing. Among those nanoparticles, 1 mol% Ga doped Pt@ZnO based sensor presents excellent acetone sensitive and interesting reversible switching from P- to N-type NO 2 sensing. The response of the 1 mol% Ga doped Pt@ZnO based sensor to 50 ppm acetone is as high as 296, and the detecting concentration limit to acetone and NO 2 is as low as 10 ppb and 20 ppb. The analogical binary p-n transition phase diagram was established to understand the NO 2 -sensing reversible switching as a function of operating temperature (T) and NO 2 gas concentration (C). The role of Ga doping in enhancing the sensing property and the mechanism of NO 2 p–n sensing transition is elaborated. In conclusion, the doping of Ga into core-shell Pt@ZnO was proved to be a feasible method for fabricating acetone and NO 2 sensor, with high sensitivity and selectivity.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yang Liu,Weihua Chen,Lehui Lu,Bai Yang
Room temperature phosphorescence (RTP) materials have been widely noticed due to their superior optical properties in the past decade. Herein, we report the Si-assisted N, P co-doped RTP carbonized polymer dots (CPDs), prepared by one-step microwave assisted heating of 3-(2-Aminoethylamino)propyldimethoxymethylsilane and phosphoric acid aqueous solution. The obtained CPDs exhibit bright RTP with an absolute photoluminescence quantum yield 34.17%, absolute phosphorescence quantum yield 11.42% and long lifetime of 1.42 s, which lasts for about 16 s to the naked eyes. We apply the obtained CPDs into information encryption and Polyethylene terephthalate (PET) film graphic anti-counterfeiting with facile way. Additionally, we make more efforts to realize aqueous RTP CPDs composite. The obtained aqueous CPDs composite exhibits bright aqueous RTP with absolute photoluminescence quantum yield (QY) of 12.61%, absolute phosphorescence quantum yield (QY) of 5.08% and RTP lifetime of 1.46 s, which lasts for about 10 s to the naked eyes. The RTP CPDs composite is nontoxic and biocompatible. These brilliant characteristics allow CPDs composite to be applicable in biological imaging. Thisstudy affords a new RTP material which can be easily prepared and used for information encryption, graphic anti-counterfeiting and biological imaging
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DOI
PubMed
高影响因子
FIRE SAFETY JOURNAL
·
2022
·
IF 3.78
Qinyong Liu,Xingyu Chen,Guiyang Zhu,Xiaoyu Gu,Hongfei Li,Sheng Zhang,Jun Sun,Xiaodong Jin
A novel integrative supramolecular intumescent flame retardant was fabricated by self-assembly of melamine, p -aminobenzene sulfonic acid and phytic acid and was abbreviated as MAP. After chelation with Fe 3+ or Zn 2+ , the resulted products (MAP-Fe and MAP-Zn) were melt-blended with polylactic acid (PLA) to enhance the flame retardancy of PLA. The fire performance was characterized by limiting oxygen index (LOI), UL-94 vertical burning and cone calorimeter tests. The results showed that control PLA was flammable with a low LOI of 20.4%, and it cannot satisfy any UL-94 grade for its severe ignited dripping, whilst the incorporation of 3% MAP-Zn increased the LOI to 29.2％, upgraded the UL-94 rating to V-0, and reduced the peak heat release rate by 18.7%. It was proposed that MAP-Zn mainly promoted the formation of more graphitic carbon in the char residues . In addition, the presence of 3% MAP-Zn slightly reduced the tensile strength of PLA from 64.9 MPa of the control PLA to 60.1 MPa, which met the requirements of most practical applications.
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高影响因子
CRYSTENGCOMM
·
2018
·Vol. 21
·期 3
·554-562
·
IF 3.304
Junli Wang,Yajie Qiao,Tingting Wang,Hongsong Yu,Ying Feng,Junhao Zhang
Stibnite (Sb2S3) is a promising material in photoelectronic and energy devices, but it frequently exhibits sheaf-like and hierarchical-like structures that consist of secondary nanorods (NRs) or nanowires (NWs) because of its spatial fractal splitting growth habit. Foreign ions or seeds enable the alteration of the growth dynamics and the consequent shape engineering of nanocrystals. We here report that the introduction of trace amounts of isovalent Bi3+ ions (typically 1–2 atom% Bi/Sb) is efficient to synthesize highly disperse, uniform Sb2S3 NRs with reduced diameters and lengths. Two temperature-dependent growth mechanisms stemming from the presence of Bi ions, the full splitting growth at high temperature and the seeded growth at low temperature, are proposed to demonstrate the formation of separated, thinner NRs. Meanwhile, the surfactant removal and the coupling with p-type CuSCN are simultaneously performed on these Sb2S3 NRs, and the resultant CuSCN/Sb2S3 composite, which contains a large amount of point-to-surface contact p–n heterojunctions with a suitable band alignment, holds promise in self-powered UV-visible photodetectors via the photovoltaic effect.
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高影响因子
危险品化学品经营许可证（带存储）