RSC Advances
·
2024
·Vol. 14
·期 12
·8204-8213
·
IF 3.9
Fangli Li,Ziqin Huang,Changjiang Liu,Meini Yang,Jixiang Wu,Wenhui Rao,Chuanbai Yu
Currently, additively efficient flame retardants are being developed to enhance the smoke suppression, flame retardancy, and thermal properties of composite materials. To this end, the current study designed and prepared a novel P/N/Si/Zn-containing organic–inorganic hybrid denoted as APHZ. Its inorganic part was 2-methylimidazole zinc salt (ZIF-8), which improved its smoke suppression and catalytic carbonization. The organic part (P/N/Si-containing compound) promoted its flame retardancy and interfacial compatibility between APHZ and epoxy resin (EP). The test results revealed that EP/APHZ-3 composites achieved a V-0 rating and a notable LOI value of 30.7% when introducing 3 wt% APHZ into the EP matrix. Cone calorimetry tests (CCT) further demonstrated that the average heat release rate (av-HRR), total smoke production (TSP), and CO production (COP) of EP/APHZ-3 were reduced by 23.3%, 14.0%, and 21.1%, respectively. Meanwhile, the char residual was increased by 60.6%, as compared to pure EP. Furthermore, the flame-retardant mechanism of EP/APHZ composites was investigated by the XPS, TG-FTIR, and Raman spectroscopy techniques. The observed synergistic effect of the imidazole skeleton ZIF-8 and P/N/Si-containing compound in APHZ facilitated the generation of a dense multi-element char layer, with the condensed phase flame-retardant mechanism playing a dominant role. These findings contribute to developing and designing high-performance flame-retardant EP.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Jingjie Gao,Shaowei Bai,Fan Wang,Liangzhen Yang,Yufeng Hu,Yuhuan Yang,Bing Bai,Zuoming Zhang
Enzymatic glycosylation is an efficient and biocompatible approach to enhance natural product bioavailability. Cellobiose phosphorylase, a novel glycosyltransferase, utilizes 1-phospho-glucose (1-p-Glc) as a glycosyl donor for regioselective glycosylation of various natural substrates. However, the high cost of 1-p-Glc limits the economic feasibility of the process. Thus, a dual-enzyme cascade system involving cellulase Ac Cel9A and cellobiose phosphorylase Cb CBP using a co-immobilization strategy was developed to overcome this challenge. The system utilizes low-cost carboxymethyl cellulose (CMC) for continuous 1-p-Glc production, which was then used in the fluorodeoxy glucose (FDG) glycosylation to generate fluorodeoxy cellobiose (FDC), which potentially traces fungal infections. The compartmentalized co-immobilization of the two enzymes within the internal and external regions of a porous zeolitic imidazolate framework-8 (ZIF-8) carrier enhanced the overall stability of the dual-enzyme system. The immobilized enzymes retained approximately 63.3 % activity after seven reuse cycles and 74 % catalytic efficiency after 12 days of storage at room temperature. Therefore, the developed co-immobilized multi-enzyme system holds significant potential for industrial biocatalysis applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Peiyun Shu,Zhe He,Gentian Yue,Yueyue Gao,Jinghao Huo,Chen Dong,Furui Tan
The application of zeolite imidazole salt metal organic frameworks (ZIFs) and layered double hydroxides (LDHs) as bimetallic materials for supercapacitor electrodes is extensive, however, their inherent limitations hinder broader usage in supercapacitors. In this work, we developed a ZnNi-ZIF/LDH composite with a honeycomb structure through a sequential process involving ion doping and hydrolysis, utilizing ZIF-8 as a template to achieve a nanoscale honeycomb architecture. Subsequent phosphorization treatment yielded ZnNi-ZIF/LDH@P composite, further improving its conductivity. This process significantly enhanced the capacitive performance and stability of the composite electrode. The ZnNi-ZIF/LDH@P composite electrode revealed an excellent specific capacitance of 2855 F·g −1 at a current density of 2 A·g −1 , maintaining an impressive 93.4 % capacitance retention after 6000 charge-discharge cycles at a current density of 15 A·g −1 . The assembled ZnNi-ZIF/LDH@P//AC asymmetric supercapacitor was capable of powering a HENU light panel for at least 2 min, and its specific capacitance remained 96.4 % of the initial value after 4000 cycles at a current density of 5 A·g −1 . Overall, the ZnNi-ZIF/LDH@P composite demonstrates outstanding capacitance performance, highlighting its great potential in the field of energy storage.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yong Tang,Xiyu Zhang,Zheng Liu,Xiaoya Liu,Xiaojie Li
Epoxy resin is renowned for its admirable comprehensive properties, but its inherent brittleness and poor fire safety severely limit its practical application in high-tech fields. Therefore, improving the fire safety and toughness of epoxy thermosets while maintaining their strength and thermal stability is both urgent and challenging. In this study, a novel hyperbranched polymer (HBPDR-DPP) has been synthesized via a one-pot, two-step process using dichlorodiphenylsilane, resveratrol, and diphenylphosphinic chloride. This polymer was then incorporated into high-performance epoxy thermosets. The resulting thermoset, containing 4 wt% HBPDR-DPP, exhibited an impressive limiting oxygen index (LOI) of 30.2 %, along with a 26.0 % decrease in peak heat release rate (PHRR) and a 10.9 % reduction in total smoke production (TSP) compared to the unmodified epoxy thermoset. These notable improvements can be primarily attributed to the synergistic carbonization effects of the silicon- and phosphorus-containing segments in HBPDR-DPP. Meanwhile, the 4 wt% HBPDR-DPP-modified epoxy thermoset exhibited significant improvements in mechanical properties, with tensile strength, flexural strength, and impact strength increasing by 37.8 %, 54.6 %, and 83.4 %, respectively. These enhancements can be attributed to the hyperbranched structure and the combination of rigid aromatic units with flexible Si-O chains in HBPDR-DPP. Moreover, the EP/HBPDR-DPP thermoset demonstrated excellent thermal stability. This study presents a simple and effective strategy for enhancing both the fire safety and mechanical properties of epoxy thermosets, offering valuable insights for the development of high-performance thermosetting materials.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Haitao Shi,Haijun Zhang,Yuan Gao,Jiajia Yang,Jiping Chen
Solid amine adsorbents are showing promise as effective adsorbents for the capture of CO 2 from various gas mixtures, including biogas and flue exhaust gas. In this study, we introduced a co-grafting strategy using 1,4-butanediol diglycidyl ether (BDDE) on the surface of P(DVB-D). This approach aimed to exploit the reaction involving the opening of epoxy groups with amine groups, forming covalent bonds between polyethyleneimine (PEI) and mesoporous organic polymers, along with the introduction of hydroxy groups to enhance adsorbent long-term stability and antioxidation ability. After an extensive assessment, P(DVB-D)@B-41.2 %PEI exhibited a maximum CO 2 capture capacity of 4.53 mmol/g at 50 °C and 50 % RH. Notably, its remarkable CO 2 adsorption performance persisted across a diverse temperature spectrum (30–90 °C) and an extensive concentration span (5–30 % vol.). In contrast to conventional adsorbents prepared solely through impregnation methods, P(DVB-D)@B-41.2 %PEI exhibited impressive long-term stability throughout 50 successive cycles and excellent resistance to oxidative degradation. These findings underscore the considerable potential of P(DVB-D)@B-41.2 %PEI in the realm of carbon capture and sequestration (CCS) technology.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yunong Qin,Chengrun Liu,Xin Peng,Zhixin Ma,Ling Li,Song Chen,Wenming Zhang
For the first time, we constructed a band-matched ZnO/NiO staggered p-n heterojunction photoelectrochemical (PEC) catalyst with superior charge separation and transfer efficiency to optimize the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) kinetics demands of a photo-enhanced zinc-air battery (PZAB). The ingenious design of heterojunction architecture effectively stimulates an internal self-built electric field (BEF), thus accelerating charge separation and migration during PEC catalysis. Upon illumination, the photocathode not only endows a promoted PEC catalytic competence to drive ORR and OER, but also reduces the charge–discharge voltage gap of PZAB. Density functional theory (DFT) calculations further disentangled the PEC catalysis activity origins by substantiating the strongly decreased Gibbs free energy potently for generating the essential intermediates *OH and *OOH during ORR and OER, respectively, and visualized the charge densities in photocathode to illustrate the authentic separation of photogenerated carriers. Remarkably, our work experimentally and theoretically sheds lights on engineering innovative and efficient bifunctional PEC catalysts to drive PZABs with photo-enhancement.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Siying Lin,Huiyuan Meng,Qi Li,Xudong Xiao,Huiquan Gu,Ying Xie,Baojiang Jiang
The simultaneous generation of hydrogen (H 2 ) and the oxidative transformation of organic molecules through photocatalytic processes represents a highly promising dual-purpose strategy. This approach obviates the necessity for sacrificial agents while augmenting catalytic efficiency, thereby facilitating the integrated production of high-value chemicals and renewable energy carriers. Polymeric carbon nitride (PCN) has emerged as a leading candidate among coupled photocatalysts. Nevertheless, PCN’s efficacy is constrained by the inefficient separation of charges and the functional limitations of its active sites. Herein, the incorporation of P-N 3 groups into PCN introduces active sites with pronounced charge asymmetry, resulting in strong local charge polarization. This asymmetric charge distribution, mediated by the P-N 3 groups, significantly enhances exciton dissociation. Remarkably, the P-N 3 -modified narrow-dimensional fragmented carbon nitride (P-CNNS) achieves an 85 % conversion rate for 4-MBA with nearly 100 % selectivity, and a hydrogen evolution rate of 27.9 mmol g −1 (with Pt as a co-catalyst), representing 6.2 times higher than that of bulk carbon nitride (BCN). The charge-polarized sites facilitate the transfer of electrons, which is a pivotal process in the activation of 4-methoxybenzyl alcohol (4-MBA). Additionally, these sites serve as adsorption sites, facilitating the oxidation of 4-MBA into anisaldehyde (AA). This work underscores the potential of non-metallic site catalysts for a wide range of coupled photocatalytic applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2015
·
IF 2.752
Zhihai Cao,Hangnan Chen,Shudi Zhu,Zhijie Chen,Chang Xu,Dongming Qi,Ulrich Ziener
A convenient method based on the inverse miniemulsion technique was proposed to prepare raspberry-like Au/SiO 2 nanocomposite particles (NCPs). HAuCl 4 was incorporated into porous SiO 2 nano-supports through a sol–gel process of a silica precursor in inverse miniemulsions. Raspberry-like Au/SiO 2 NCPs were subsequently obtained through in situ reduction of the incorporated HAuCl 4 by hydrazine at the surface of SiO 2 nano-supports. Most of Au nanoparticles (NPs) were half-embedded in the SiO 2 nano-supports and were covered by a thin layer of porous SiO 2 , offering a good morphological stability to the Au/SiO 2 NCPs. The content of Au NPs of the Au/SiO 2 NCPs could be adjusted by the loading of HAuCl 4 . The influences of the HAuCl 4 loading on the particle size and particle morphology of the Au/SiO 2 NCPs, the pore properties of the SiO 2 nano-supports, as well as the properties of the Au NPs were systematically investigated. The formation mechanism of the raspberry-like Au/SiO 2 NCPs was discussed. All the synthesized Au/SiO 2 NCPs displayed a high catalytic activity towards the reduction of p -nitrophenol.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Nuoxin Xu,Xingrong Xiao,Hui Yang,Enjie Yu,Qilong Zhang
In this study, TiO 2 nanowires with various aspect ratios were prepared via a precursor-controlled hydrothermal process. Ternary composite films comprised of P(VDF-HFP) polymer, Ag particles and the as-synthesized TiO 2 nanowires were then fabricated. The results reveal that TiO 2 NWs with high aspect ratios (i.e., pa-TiO 2 ) exhibit superiority in enhancing the dielectric constants of composites in comparison with their low-aspect-ratio counterparts (i.e., pr-TiO 2 ). For instance, the dielectric constant of the Ag/pa-TiO 2 /P(VDF-HFP) composite with 30 vol% TiO 2 NWs reaches 33.4 at 100 Hz, which is 42.1% larger than that of Ag/pr-TiO 2 /P(VDF-HFP) sample and 227% higher than pristine P(VDF-HFP). In addition, TiO 2 nanowires also serve as physical obstacles to avoid aggregation of Ag particles. As a consequence, the ternary composites filled with high-aspect-ratio TiO 2 NWs exhibit suppressed dielectric losses (e.g., 0.023 at 100 Hz) and low conductivities, making them promising candidates for applications in integrated capacitors and energy storage devices.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 22
·8602-8609
·
IF 8.262
Wei Wan,Qiang Wang,Li Zhang,Hai-Wei Liang,Ping Chen,Shu-Hong Yu
The zinc–air battery is a promising energy device because of its high energy density and high safety. Developing efficient electrocatalysts for the oxygen reduction reaction (ORR) in air electrode is of great importance for high-performance zinc–air batteries. Herein, we first report N, P and Fe-tridoped nanoporous carbon ORR electrocatalysts derived from plant biomass corn silk. It is a cheap, accessible and recyclable biomass, which can offer a good basis for developing catalysts with low-cost and high yield production. The electrocatalysts were prepared by a hydrothermal process and a two step heat treatment process. The Fe element doped in the catalyst mainly came from FeCl3 and the P element came from corn silks. The N was from NH3 and corn silks. The biomass-derived catalyst exhibited a remarkably higher ORR activity, superior stability and tolerance to methanol poisoning effects in alkaline media than Pt/C catalyst. The catalyst also showed higher voltage and higher specific capacity than the Pt/C in a zinc–air battery and it may be an alternative to Pt/C in the practical application of the zinc–air battery. This study showed the possibility for rational design and preparation of high-performance electrocatalysts with a low-cost from a highly available and recyclable plant biomass.
✓ 已验证
产品关联
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2016
·Vol. 11
·期 2
·305-313
·
IF 0.728
Xing Li,Lei Bei,Zhi Sun,Kun Liu,Xu Zhang,Xiaozhao Han
The study aimed at investigating the addition effects of P, K, and micronutrient fertilizers on the permeability of N-nutrient fertilizer urea through a representative polymer membrane, which is of great importance in polymer-coated compound fertilizer. Specifically, the permeability of urea through polystyrene membrane was determined experimentally at the nominal temperature of 298 K using the Ussing chamber method for fertilizer solutions of urea–water, urea–NaH 2 PO 4 –water, urea–Ca(H 2 PO 4 ) 2 –water, urea–KCl–water, and urea–NaCl–water. The experimental data showed that the addition effects of NaH 2 PO 4 , KCl, and NaCl on urea permeability were pronounced and could be promotion or suppression depending on the amounts added. The variation of urea permeability with additive concentration could be explained by the ‘solution–diffusion’ model, suggesting that the specific intermolecular and interionic interactions in the permeation solution were an important factor determining the permeability. Using the saturated urea–water solution as basis, the addition of saturated KCl increased the urea permeability by 2.5 times, while the addition of saturated Ca(H 2 PO 4 ) 2 and NaH 2 PO 4 decreased the permeability by 41% and 76%, respectively. © 2016 Curtin University of Technology and John Wiley & Sons, Ltd.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 51
·期 23
·10574-10584
·
IF 2.302
Zhao Jie,Xie Yu,Fang Jing,Ling Yun,Gao Yunhua,Liu Xiaoming,Zhang Qiugen,Xu Qiuhua,Xiong Hui
A novel electromagnetic material has been synthesized through P -phenylenediamine-benzoquinone (PB) Schiff base Ag(I) complexes chemically bonded to few-layered graphene (FLG). The structure of the samples was characterized by Fourier transform infrared spectroscopy and X-ray diffraction. The shape and size were observed by scanning electron microscopy and transmission electron microscopy. The conductive properties were tested by a four-probe conductivity tester at room temperature, and the magnetic properties of the samples were tested with the vibrating sample magnetometer. These results show that the PB Schiff base Ag(I) complexes are chemically bonded onto the FLG layers. The conductivity, magnetic saturation, residual magnetization, and coercive force of the composite achieve 5.86 S cm −1 , 1.47 emu g −1 , 0.26 emu g −1 , and 208.3 Oe, respectively. Finally, based on the experimental results, the probable formation, electronic transmission, and magnetic mechanism have also been investigated.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）