DALTON TRANSACTIONS
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2024
·Vol. 53
·期 27
·11481-11489
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IF 3.5
Fangyou Meng,Qing Chen,Kaiyi Shi,Shuangzhu Jia,Xuexin Dai
This study investigated a novel electrocatalyst with a core–shell structure of CoNiP@N,P-C. The unique carbon shell of this catalyst serves a dual purpose: exposing numerous active sites and safeguarding CoNiP nanoparticles from dissolution caused by the electrolyte. As a result, the CoNiP@N,P-C nanoparticles exhibit exceptional electrochemical properties. The CoNiP@N,P-C catalyst displays overpotentials of 234 and 314 mV for the HER and OER, respectively, within a simulated seawater solution (1 M KOH + 0.5 M NaCl), indicating its outstanding catalytic performance. Moreover, when subjected to full seawater splitting, the CoNiP@N,P-C catalyst exhibited high activity, achieving a 1.71 V cell voltage at a current density of 10 mA cm−2. As revealed by density functional theory (DFT) calculations, the CoNiP@N,P-C catalyst exhibits Gibbs free energy for hydrogen adsorption (ΔGH* = −0.19 eV) that is decreased in comparison with CoP@N,P-C, NiP@N,P-C, and N,P-C (−0.321 eV, −0.434 eV, and 0.723 eV, respectively). This finding confirms that the core–shell structure plays a role in enhancing the HER kinetics and improving the catalytic performance, which is consistent with the experimental observations. Consequently, this study introduces the concept of utilizing bimetal phosphide core–shell structures for overall seawater splitting, offering a novel approach in this field of research.
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高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2025
·
IF 4.9
Bao Xuemei,Yang Yongcong,Zhao Tianjing,Liu Song,Zhou Wenyao,Liu Qianqian,Yu Fengjiao,Yang Yang
A modified polysulfone (PSF) ultrafiltration (UF) membrane is designed by grafting phytic acid/silver ion (PA-Ag I ) complex aggregates on the membrane surface for achieving improved separation and anti-biofouling performance. We demonstrate that PA molecules directly grafted on the PSF membrane surface through hydrogen bonding offer a suitable coordinating ability to immobilize Ag ions to form hydrophilic aggregates. One-cycle sequential assembly reinforced by a high concentration of PA is confirmed optimal for generating a compact grafting layer with better water affinity and properly narrowing the pore aperture. This modification results in a reasonable permeation flux (313.3 L m –2 h –1 bar –1 ), a high BSA rejection (93.2%) and a good antifouling property. Moreover, the PA-Ag I /PSF membrane displays excellent antibacterial and anti-adhesion properties against E. coli and B. subtilis , attributed to the gradual release of Ag ions from the moderately stable PA-Ag I complexes in a favorable aqueous environment. The PA-Ag I /PSF membrane keeps over 83% of water flux after incubation of bacteria culture for 48 h, presenting outperforming anti-biofouling durability. The low dosage of Ag ions from the PA-Ag I /PSF membrane has merits of low consumption, optimization of release profile, and alleviated environmental concerns.
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DESALINATION
·
2024
·
IF 8.3
Yiyun Cao,Lvji Yan,Bichao Wu,Dun Wei,Baixue Ouyang,Peng Chen,Tingzheng Zhang,Justice Annor Asare,Yuxin Jiang,Yingjie He,Haiying Wang
The capacitive deionization technology has demonstrated its efficacy in removing chlorine-containing contaminants from water. However, the long-term and selective removal of Cl − remains a significant challenge. We present the synthesis of nitrogen‑phosphorus co-doped carbon composites embedded with silver-metal particles by incorporating N and P heteroatoms, which serve as effective anchoring sites for metallic Ag. The design of the electrode material ultimately enhances the electrochemical stability of silver by facilitating strong interactions between nitrogen and phosphorus with the silver and carbon substrates, respectively, forming stable chemical bonds. The electrode material exhibited excellent dechlorination performance, with a selectivity factor (Cl − versus SO 4 2− ) of up to 83.4 for Cl − in wastewater in a mixed solution and an adsorption capacity of 99.2 mg·g −1 for Cl − . Additionally, the silver-based selective dechlorination electrode achieved a desalination capacity of 77.7 mg·g −1 for Cl − in a single system and demonstrated remarkable stability over 100 cycles, retaining 93.99 % of its capacity. The present study demonstrates that introducing nitrogen and phosphorus can significantly enhance the cyclic stability of silver‑carbon electrodes, thereby facilitating the sustainable treatment of chlorinated wastewater.
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PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Fei Hu,Yu Cai,Yuhui Xie,Hui Jiang,Feng Wu,Dong Feng,Yang Meng,Yi Mei,Delong Xie
The development of transparent flame-retardant coatings has garnered significant attention due to their potential applications in enhancing fire safety while maintaining aesthetic appeal. This study investigates the synthesis and characterization of a phosphorus‑nitrogen (P N) synergistic flame-retardant system, referred to as PD, which is synthesized from phytic acid (PA) and dicyandiamide (DICY) for polyacrylate substrates. Through a series of experimental analyses including XPS, FTIR, TGA, SEM-EDS, and cone calorimetry, the flame-retardant efficacy and mechanisms of the PD/SiO 2 composite were investigated. The results demonstrate that the incorporation of PD/SiO 2 effectively enhances the flame retardancy of polyacrylate coatings, manifesting promising gas-phase and condensed-phase flame retardant effects. The coatings exhibit excellent stability, compatibility, and adhesion with polyacrylate substrates, while maintaining high levels of light transmittance and mechanical properties. Moreover, the optimized formulations show improved water resistance and meet stringent flame-retardant standards such as LOI and UL-94. The study underscores the potential of transparent flame-retardant coatings in various industries and highlights avenues for further optimization and practical application.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xinde Bao,Xiaofan Li,Yepan Zhong,Sifan Fan,Zurong Huang,Xin Guan,Xiaoyun Chen,Jinguo Lin
To enhance the flame-retardant and smoke-suppression of fast-growing wood, Chinese fir ( Cunninghamia lanceolata (Lamb.) Hook .) was impregnated with environmentally friendly, non-toxic, and green flame retardants and subsequently characterized. The results indicated that compared with unmodified wood, the thermal stability and fire resistance of modified wood were improved, the total heat release of delignification (DWM) and non-delignification (NWM) modified decreased by 47.08 % and 27.87 %, respectively, the total smoke production decreased by 18.24 % and 98.14 %, respectively, and the weight gains of modified wood was significantly increased by 67.12 % and 24.26 %, respectively. The impregnation and filling of composite flame retardants interfered with the crystalline regions of wood and reducing then by 26.86 % and 27.22 %, respectively, but did not change the crystal structure of wood. The appearance of Si-O-C, Si-O-Si, Si-O, Al-O, and P-O characteristic peaks confirmed that the composite flame retardants were not only physically filled but also chemically bound in the wood and formed a gel cross-linked network structure. According to the microscopic morphology observations, the composite flame retardants were uniformly distributed in the wood, and delignification reduced the color difference on the wood surface. Therefore, the composite flame retardant modified wood can be widely used as a decorative material. Simultaneously, this material reduces the possibility of fire, reduces the emission of harmful gases, and enhances environmental protection and human safety.
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POLYMER COMPOSITES
·
2024
·Vol. 45
·期 10
·9209-9223
·
IF 4.8
Sensen Han,Shuangshan Li,Dongyan Liu,Yu Dong,Ziqi Gao,Yanxi Zhang,Qingshi Meng
The development of polyurethane composites with significant flame retardancy and corrosion resistance for widening its practical application is a great importance. In this study, supramolecular wrapped α-ZrP (MCP@ZrP) was prepared via self-assembly of melamine, cobalt ions (Co 2+ ) and phytic acid (PA) on the surfaces of α-zirconium phosphate (α-ZrP). It was found that both compatibility and dispersion of α-ZrP sheets in thermoplastic polyurethane (TPU) matrices were improved with the incorporation of organic supramolecular components in TPU/MCP@ZrP nanocomposites. Moreover, their fire-retardant characteristic was significantly enhanced, along with effective suppression of smoke and toxic gas emission. By adding 5 wt% MCP@ZrP, peak heat release rate, total heat release, total smoke production, and total CO production of such nanocomposites were reduced by 35.66%, 18.01%, 15.52%, and 41.42%, respectively. The generation of a continuous and dense char layer benefited from well-dispersed MCP@ZrP nanohybrids, which resulted in tortuous effect to impede heat diffusion and prevent the evaporation of volatile gasses. By means of the barrier effect of ZrP, TPU/MCP@ZrP composite films also showed improved anticorrosion performance. Effective interfacial adhesion, achieved by combining MCP supermolecules and α-ZrP sheets, offers a viable approach to improve protective properties of TPU nanocomposites. Highlights Supramolecular-wrapped α-ZrP was prepared via self-assembly strategy. MCP@ZrP showed good dispersion and interface adhesion within TPU matrices. MCP@ZrP enhanced the flame retardancy and mechanical performance of TPU. MCP@ZrP preventing smoke and toxic gas evaporation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Rongrong Si,Honggang Luo,Junwen Pu
Wood-conducting polymer materials have been widely used as supercapacitor electrode; however, it remains challenging to achieve a simple method to improve the homogeneity of the conductive material on wood and to reach high mass loading. Herein, a novel “pore-making, active substance-filling, densification (dissolution, in-situ polymerization of polyaniline (PANI), self-shrinking)” strategy is proposed for the preparation of wood electrodes with a high mass loading (41.4 wt%) and homogeneity. Ingeniously, ZnCl 2 as a dissolving agent and pore-making agent to treat delignified wood can generate more pores on the wood, which is more conducive to the penetration of aniline small molecules, besides, the dissolved fine fibers can be entangled with more PANI, which can improve the loading and homogeneity of PANI. After drying treatment, there will be shrinkage again, playing a certain physical densification effect on the large lumen. The optical electrode was RWP2 showing high electrochemical performance (2328.9 mF/cm 2 , 1 mA/cm 2 ), and stability (5000 cycles, 89.3 %). Moving forward, the RWP2//RWP2 SSC showed an excellent energy density of 164.24 μwh/cm 2 at a power density of 250 μw/cm 2 . Remarkably, the simple and versatile strategy of designing wood-based materials with high mass loading provides new research ideas for realizing multifunctional applications.
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COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Yu-long Liu,Zi-cheng Tang,Zi-jie Huang,Wan-jun Jiang,Ting-yu Zhu,Jie Chen,Jing-hui Yang,Xiao-dong Qi,Yong Wang
Phase change materials (PCMs) with thermal energy storage property are vital in solar-thermal energy conversion and utilization systems. However, low thermal conductivity, low light absorption, and severe brittleness are major application-hindering factors. In this work, paraffin wax (PW) was vacuum impregnated into poly(dimethylsiloxane) (PDMS)/boron nitride (BN)/polypyrrole (PPy) foam to create flexible phase change composites (PCCs) with excellent thermal conductivity and solar-thermal energy conversion efficiency. The PDMS/BN/PPy foams were successfully prepared via the sugar template and chemical vapor deposition methods. The PDMS/BN/PPy/PW PCCs exhibited excellent phase change latent heat of 172 J g −1 and dimensional retention ratio of 98.91%. The continuous BN network imparted the PCCs with enhanced thermal conductivity of 0.43 W m −1 K −1 . Meanwhile, the flexible PCCs were capable of being elastically deformed and closely adhered to the rough surface, thus further improving the heat transfer efficiency. More importantly, the wrinkled PPy and the hierarchical porous structure improved light absorption by extending the optical path for multiple reflections, maintaining an outstanding solar-thermal energy conversion efficiency of 91.9%. A solar-thermal-electric energy conversion (STEEC) system was constructed to display the potential of PCCs to generate clean energy. PCCs could output a current of 84.7 mA and support the rotation of a fan for 243 s, even without light irradiation. This study provides a facile approach to preparing multi-functional PCCs, showing the advantages in the rapid collection and storage of solar energy.
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CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Bo Hu,Qing Fang,Bailing Liu,Jianxin Ma,Qingbo An,Hong-Ying Zang,Yang-Guang Li,Haiming Xie,Zhong-Min Su
Proton-conducting materials serving as key components in various electrochemical and energy conversion devices have attracted a great deal of attention. The creation of superior proton-conducting materials in a wide temperature range under both humidified and anhydrous conditions is of great significance for practical applications. In this paper, we develop a coprecipitation synthesis approach for a new proton-conducting nanocomposite, [Bi2O2]Hx-PA0.28, which consists of a layered framework with [Bi2O2]2+ and phytic acid (C6H18O24P6, abbreviated as PA) existing as interlayer-embedded charge-balancing anions. Infrared spectroscopy (FTIR), solid-state NMR, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) suggest that oxygen atoms on the surface of the [Bi2O2]2+ layer bridge the uncoordinated oxygen atoms on the phosphate group to form a strong hydrogen bonding network. This leads to a water-assisted proton conductivity of 1.76 × 10–2 S cm–1 at 90 °C under 98% RH and even a stable anhydrous proton conductivity of 5.24 × 10–3 S cm–1 at 150 °C. Isotope effect tests have verified the selective transmission of hydrogen ions by the composite electrolyte materials. [Bi2O2]Hx-PA0.28 as electrolyte was further assembled into an ion-selective electrode for the recognition of hydrogen ions. Furthermore, open circuit potential time (OCPT) testing further confirms that solid-state electrolytes composed of [Bi2O2]Hx-PA0.28 exhibit a good electrochemical stability. This work broadens the possibilities for the development of solid-state proton conductors in a wide temperature range, even under anhydrous conditions.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Renquan Xing,Ying Liu,Jing Yan,Run Wang,Xupin Zhuang,Guang Yang
Moist-electric generators (MEGs), which are capable of spontaneously generating energy from ubiquitous moisture, are considered as a potential power supply candidate for wearable electronics . However, the application of the MEGs in the wearable field is still challenging due to the low electric output and the lack of wearable attributes such as breathability and flame retardancy. Herein, we demonstrated a wearable MEG with high power-output, breathability and flame retardancy, which was fabricated by designing an asymmetrical nanofiber assembly using hydrophilic polyvinyl alcohol/phytic acid (PVA/PA) and hydrophobic polyvinylidene difluoride (PVDF) nanofiber membranes. Owing to the synergistic effects of strong water absorption, enhanced ion release and numerous micro-nano transport channels, a single MEG of 1 cm 2 could constantly generate high direct-current (DC) power, i.e., a voltage of 1.0 V, a current of 15.5 μA, and a power density of 3.0 μW cm −2 , outperforming other reported nanofiber-based MEGs. More importantly, the asymmetric nanofiber structure ensured the moisture circulation inside MEG and thus produced a sustained voltage output for 7 days without any deterioration. The MEG also showed good flexibility, air/moisture permeability and flame retardancy, which give it necessary wearable attributes. Furthermore, large-scale integration of MEG units could be readily realized to fabricate a power source device for driving different portable electronics, while the moisture sensitivity made the MEG well used for sensing applications (e.g., respiration monitoring, fire warning).
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Nano Energy
·
2024
·
IF 16.8
Hanchen Wang,Ruzhi Shang,Junwei Chen,Xiaoya Jin,Kailiu Chen,Biao Huang,Huamin Chen,Qi-Lin Lu
Chitosan hydrogel has garnered significant interest for its potential to confer excellent biocompatibility, degradability, and renewability upon flexible electronics. Nonetheless, its inherent mechanical weaknesses have necessitated compromises in terms of flexibility, conductivity, and sensing sensitivity, thereby limiting its applicability. In this study, we present a flexible chitosan sensing hydrogel with remarkable properties, including high-conductivity (9.96 S/m) and ultra-sensitivity (gauge factor=11.83), achieved through the coordination effect of phytic acid (PA). A novel protective cross-linking strategy was employed, balancing the strong complexing ability of PA through the regulation of carboxylated cellulose nanofiber (CCNF) to establish a moderate cross-linked network between chitosan (CS) and polyethyleneimine (PEI). CCNF not only forms hydrogen bonds with CS and PEI, occupying some active sites that could chelate with PA, but also repels adjoining PA via electrostatic repulsion , thereby preventing excessive coordination. Consequently, the resulting hydrogel exhibits superior properties, including excellent flexibility, deformability , conductivity and GF, while simultaneously possessing high sensing sensitivity and energy harvesting capacity. Remarkably, the hydrogel-assembled sensors demonstrate outstanding performance in monitoring subtle facial expression changes, throat motion, and various limb movements. Even more impressively, the hydrogel-based triboelectric nanogenerator (TENG) exhibits exceptional energy harvesting capacity (1070.8 mW/m 2 ) and high accuracy (98 %) for handwriting recognition. This study presents a promising approach for constructing biomass-based multifunctional hydrogels with enhanced sensing capabilities and energy harvesting abilities, paving the way for their utilization in high-performance self-powered devices and intelligent handwriting recognition systems.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wenhao Xi,Tongchen Wu,Pan Wang,Wenlong Huang,Bifen Gao,Liwen He,Yilin Chen,Bizhou Lin
Transition metal phosphides (TMPs) with high electrocatalytic activity for the oxygen evolution reaction (OER) are reckoned as a substitution of precious group metals catalysts in rechargeable Zn-air battery. In this work, Co/Co 2 P heterojunction nanoparticles supported N,P-doped carbon nanosheets (Co/Co 2 P@NPCNS) were designed and prepared via a facile one-step molten salt-assisted pyrolysis process. Density function theory calculations reveal that the heterogeneous interactions of Co/Co 2 P effectively enhance the bifunctional electrocatalytic activity for oxygen reduction reaction (ORR) and OER. The synergistic interaction between the Co/Co 2 P heterojunction nanoparticles with highly exposed active sites and excellent catalytic activity and the two-dimensional doped carbon nanosheets with high conductivity contributes to Co/Co 2 P@NPCNS exhibiting preeminent bifunctional ORR/OER activity and stability with a high half-wave potential for ORR (0.87 V), a low overpotential for OER (302 mV at 10 mA cm −2 ) and a low potential gap (0.66 V). The homemade rechargeable Zn-air battery performs high peak power density (187 mW cm −2 ) and exceptional endurance. This heterogeneous interface tactic of integrating TMPs with heteroatom-doped carbon materials may shed light on the research and development of non-precious metal electrocatalysts.
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