Materials
·
2023
·Vol. 16
·期 15
·5478
·
IF 3.4
Yaohui Xu,Liangjuan Gao,Pingkeng Wu,Zhao Ding
A cubic fluorite-type CeO2with mesoporous multilayered morphology was synthesized by the solvothermal method followed by calcination in air, and its oxygen storage capacity (OSC) was quantified by the amount of O2consumption per gram of CeO2based on hydrogen temperature programmed reduction (H2–TPR) measurements. Doping CeO2with ytterbium (Yb) and nitrogen (N) ions proved to be an effective route to improving its OSC in this work. The OSC of undoped CeO2was 0.115 mmol O2/g and reached as high as 0.222 mmol O2/g upon the addition of 5 mol.% Yb(NO3)3∙5H2O, further enhanced to 0.274 mmol O2/g with the introduction of 20 mol.% triethanolamine. Both the introductions of Yb cations and N anions into the CeO2lattice were conducive to the formation of more non-stoichiometric oxygen vacancy (VO) defects and reducible–reoxidizable Cen+ions. To determine the structure performance relationships, the partial least squares method was employed to construct two linear functions for the doping level vs. lattice parameter and [VO] vs. OSC/SBET.Keywords:CeO2;doping;solvothermal;oxygen storage capacity;porous
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Solar RRL
·
2023
·Vol. 7
·期 20
·2300369
·
IF 7.9
Haoyu Wang,Shuanghong Wu,Haolin Zhang,Xianghua Yao,Furong Wang,Peng Huang,Xiaodong Liu
The light-soaking (LS) effect has been reported to limit the accuracy and stability of device power output of perovskite solar cells (PSCs) and it is significant to develop effective approaches and strategies to eliminate the LS effect in PSCs. There are very few reports on suppressing the LS effect in CsPbI 2 Br-based all-inorganic PSCs. Herein, a method to eliminate the LS effect by synchronous passivation of anionic and cationic defects in CsPbI 2 Br perovskite film is demonstrated. The 4-(chlorosulfonyl)benzoic acid (CSBA) is added into perovskite precursor and the in situ generation of I 3 − effectively passivates the anionic halogen vacancy defects in CsPbI 2 Br. In the meantime, the Lewis base groups on CSBA coordinate with Cs + and Pb 2+ to passivate the cationic defects. This zwitterionic passivation effect of CSBA remarkably cuts off the path of defect-induced charge recombination and thus eliminates the LS effect. This work offers a deep opinion for future researchers to modulate the LS effect of all-inorganic PSCs.
✓ 已验证
DOI
高影响因子
Journal of Oleo Science
·
2023
·
IF 1.5
Yuanyuan Zhang,You Li,Zhaoming Ran,Na Wang,Aicha Mekkaoui,Ce Wang,Li Zhao,Baocai Xu
Amino acid surfactants derived from animal/vegetable oils and amino acids have attracted growing interest in surfactant industry. The relationship between the molecular structures of natural building blocks and the performance of the derived surfactants has become a significant subject in their application. A series of serinate surfactants with different characteristic acyls were synthesized. The specific effect of the fatty acyl structures, namely, the hydrocarbon chain length, the number of C=C bonds, and hydroxyl substituent, on the foam properties and interfacial behaviors were revealed. The serinate surfactants with long fatty acyls showed better interfacial activity and were more closely arranged at the interface, thus improving the foam stability. But the long fatty acyls also decreased the water solubility, and lead to the decreased the foamability of N-stearyl serinate surfactant. The C=C bonds in the fatty acyl improved the water solubility of the surfactants. But multiple cis C=C bonds caused the bend of hydrocarbon chains, which was unfavorable for the close arrangement of surfactant molecules, thus leading to the decrease of the foam stability. The hydroxyl group in the ricinoleoyl decreased the intermolecular van der Waals interactions and hindered the close arrangement of ricinoleoyl serinate surfactant molecules, leading to the decrease of the foam stability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Russian Journal of Physical Chemistry B
·
2023
·Vol. 17
·期 3
·695-701
·
IF 1.4
Wang Y.,Dong X.,Jiang B.,Dai X.,Song H.
Abstract An alternative route to synthesize Ni 2 P–N/TiO 2 in N 2 atmosphere instead of H 2 atmosphere by thermal treatment method was proposed, and the Ni 2 P–N/TiO 2 catalyst was investigated in benzofuran hydrodeoxygenation (BF HDO) performance. X-ray diffraction (XRD), transmission electron microscope (TEM), N 2 -adsorption specific surface area measurements, CO uptake and X-ray photoelectron spectroscopy (XPS) were used to characterize the catalysts. The results showed that, the Ni 2 P–N/TiO 2 catalyst possessed a smaller and highly dispersed Ni 2 P particles on the catalysts showed a higher benzofuran hydrodeoxygenation conversion (91.9%) and ethylcyclohexane selectivity (70.4%).
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2023
·
IF 3.8
Yanjing Li,Shilong Dong,Lili Wang,Xiaoyan Sun,Wenying Zhao,Shuguang Xiang
LLE data of cyclooctane/3-methylpentane + benzene/toluene + N -methylpyrrolidone (NMP) at 298.15 K and 313.15 K under a pressure of 101.3 kPa were measured in this work. The Othmer-Tobias and Hand equations were adopted to validate the reliability of LLE data, where the correlation coefficients ( R 2 ) were close to unity, indicating the high reliability of the experimental data. The experimental data were analyzed using the distribution coefficient ( D ) and separation factor ( S ), and the effect of NMP extracting benzene and toluene from aromatics was explored. Meanwhile, the reason for the different extraction efficiencies of benzene and toluene using NMP was analyzed by quantum chemical calculations. The NRTL and UNIQUAC thermodynamic models were used to correlate the liquid–liquid equilibrium data, and the relevant binary interaction parameters were obtained. The calculated root mean square deviation (RMSD) were all less than 0.0063, indicating that the obtained binary interaction parameters can be used to simulate and calculate the extraction of aromatics using NMP.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 17
·1-10
·
IF 2.8
Wang Wenjun,Wu Jingxuan,Zou Song,Luo Qingsong,Wang Zhenxing,Wan Yu,Wang Yimu,Feng Changhao
In this study, LaFeO 3 nanotubes were created using the electrostatic spinning method and then calcined at various temperatures. Investigations into the impact of calcined temperatures on the morphological properties of LaFeO 3 nanotubes used a variety of methods. The results show that the surface of LaFeO 3 nanotubes gradually became rougher when the calcination temperature was above 700 °C, which could enhance the gas-sensitive properties of n-butanol. The response of LaFeO 3 nanotubes is 45.3–100 ppm n-butanol at 150 °C, and the low detection limit is 0.3 ppm. In addition, LaFeO 3 nanotubes calcined at 700 °C were found to have excellent selectivity for n-butanol. The mechanism of calcination temperature on the improvement of gas-sensitive properties of LaFeO 3 nanotubes was also proposed.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Haowei Liu,Pengchao Wu,Lumiao Hou,Xiaofan Zhang,He Zheng,Bolin Niu,Shaohua Liu,Jianwei Fu
Porous organic polymers (POPs) have great potential in air and water pollutant treatments. However, the cost-effective syntheis of novel POPs remains a challenge. In this work, we fabricated a new porous organic polymer with P-N linkage (PCPD) via a low-cost catalyst-free polycondensation between 3,3′-diaminobenzidine and hexachlorocyclotriphosphazene under solvothermal conditions. The chemical composition , microstructure and thermal property were characterized by FT-IR, SEM, TEM NMR, DSC , TGA and N 2 sorption . The adsorption performance of PCPD was also studied. The results revealed that PCPD owns good microporosity , N-rich skeleton as well as abundant amino/imine groups. Tested for CO 2 adsorption at 273 K/1 bar and 298 K/1 bar, PCPD exhibited superior CO 2 uptakes of 127.6 mg g −1 and 83.6 mg g −1 , respectively. Moreover, the isosteric heats of adsorption at low adsorption values was up to 33.3 kJ mol −1 . PCPD also delivered a superior removal performance towards toxic Cr (VI) from aqueous solution with equilibrium adsorption capacity of 205 mg g −1 and instantaneous adsorption capacity of 148 mg g −1 within 5 min at pH= 2. The Cr (VI) adsorption process is spontaneous and exothermic and well obeys intraparticle diffusion model, pseudo-second order kinetics , and Langmuir isotherm model. The plausible removal mechanism included electrostatic interaction, hydrogen bonding interaction, pore filling and the concurrent Cr (VI) reduction followed by in situ chelation on polymer adsorbent. PCPD would open a new field for efficient treatment of air and water pollutants due to its fascinating structure feature and excellent adsorption performance.
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 18
·3889
·
IF 4.967
Jing Li,Fanxun Lv,Ran Yang,Liping Zhang,Wei Tao,Guotao Liu,Hui Gao,Ying Guan
Medulla tetrapanacisis composed of a lignocellulosic biopolymer and has a regular porous structure, which makes it a potential biomass material for preparing porous N-doped biochar. Herewith, N-dopedMedulla tetrapanacisbiochar (UBC) was successfully prepared by modification with urea and NaHCO3under pyrolysis at 700 °C. The nitrogen-containing groups were efficiently introduced into biochar, and the micro-pore structures of the UBC were developed with sizeable specific surface area, which was loaded with massive adsorption sites. The adsorption kinetics and isotherms of the UBC conformed to pseudo-second-order and Langmuir model. The superior adsorption capacities of the UBC for methylene blue (MB) and congo red (CR) were 923.0 mg/g and 728.0 mg/g, and the capacities for Cu2+and Pb2+were 468.5 mg/g and 1466.5 mg/g, respectively. Moreover, the UBC had a stronger affinity for Cr3+and Fe3+in multiple metal ions and retained at a preferable adsorption performance for dyes and heavy metals after five cycles. Precipitation, complexation, and physical adsorption were the main mechanisms of the UBC-adsorbing metal ions and dyes. Thus, lignocellulosic biochar has great potential for removing dyes and heavy metals in aqueous solutions.Keywords:urea modification;efficient adsorption;porous biochar
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 45
·e53105
·
IF 3.057
Xiaohan Li,Ke Zhang,Jiateng Huang,Ziyao Zhou,Kaili Xie,Xiaojie Li,Wei Wei
In order to improve the flame-retardant properties of epoxy resin (EP) without sacrificing the mechanical properties, a high-efficient P/N/S-containing reactive flame retardant (VTZD) was synthesized by a facile one-pot method from vanillin, 2-aminobenzothiazole and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), and used in epoxy-amine thermosets. When 5 wt% of VTZD was added with merely 0.31 wt% of phosphorus, the LOI value of cured resins increased to 32.7%, and the thermosets achieved a UL-94 V-0 rating. Furthermore, the peak heat release rate and the total heat release of the VTZD-modified EP decreased by up to 34.66% and 32.49%, respectively, in comparison to those of the original EP. Subsequently, the residual char morphology and structure of epoxy thermosets were investigated, as well as the pyrolysis behavior of VTZD. The flame-retardant mechanism was discussed in detail, and it confirmed that VTZD exhibited a bi-phase flame retardant effect. In addition, the mechanical properties of the cured products were well maintained and even improved. All the results demonstrated that the VTZD was a bio-based high-efficiency flame retardant for EP with a broad prospect in practical applications.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Xian-Hui Zhang,Liang-Liang Zha,Ji-Wei Chen,Chuan-Ying Wei,Bo Wu,Jun-Wei Wang,Hong-Liang Yu,Jian-Hua Wu,Xue-Feng Yan
There are numerous challenges in the low-cost batch fabrication of high-performance absorbers. A low-cost preparation process for metal-containing acrylic resin ( 3SM-yAN , y = 6, 9 and 12) employs a one-step free radical polymerization of iron (III) chloride, sodium methacrylate, and acrylonitrile. Fe-3SM-yAN was prepared using carbonization. The carbonization of metal-containing acrylic resin was performed at 800 °C in an argon atmosphere for two hours. The broadest effective absorption bandwidth (EAB) of Fe-3SM-9AN absorbing material yielded 8.07 GHz at 2 mm with a minimum reflection loss of − 36.70 dB (11.41 GHz), and the EAB could cover 14.8 GHz (3.2–18 GHz) with a tunable absorber thickness from 1.0 to 5.0 mm. The synergistic effect of impedance matching and strong electromagnetic attenuation was found to yield excellent microwave absorption of Fe-3SM-yAN （y = 6, 9 and 12）. The magnetic porous shell-like Fe-3SM-yAN is potentially highly suitable for batch production of lightweight and efficient microwave-absorbing materials.
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 18
·9953-9967
·
IF 6.123
Wan Jiansheng,Li Hong,Cai Xiaoyu,Yan Jun,Liao Yongping
In this study, functional coatings with N-halamine structure were formed on cotton fabrics by dopamine (DA) auto-deposition and DA/Polyethyleneimine (PEI) covalent co-deposition, respectively. SEM、UV-Vis and XPS had confirmed the deposition of DA and DA/ polydopamine (PDA) on the cotton fabrics. When the mass ratio of DA/PEI was 1:1.5, a uniform functional coating was formed. XRD had indicated that the coating and the oxidative sodium hypochlorite solution did not affect the crystal structure of cellulose. The DA/PEI co-deposited modified cotton fabric had excellent antibacterial property after chlorination, and the inactivation rate against E coli and S aureus could reach 100% with a contact time of 30 min. In vitro cell cytocompatibility studies demonstrated that the DA/PEI co-deposited modified cotton fabric has good biocompatibility. The functional coating on the cotton fabric remained stable after 50 washing cycles. The UPF values and the wrinkle recovery angle (WRA) tests showed that the DA/PEI co-deposited coating imparted great durable press and UV protective properties to the cotton fabric. The breaking strength loss rate of the modified cotton fabrics after chlorination was about 20%, which had little effect on the wearing property. Graphic abstract
✓ 已验证
产品关联
DOI
高影响因子
Carbon Letters
·
2022
·Vol. 33
·期 2
·409-418
·
IF 3.117
Chen Liang,Yang Lanyun,Xu Chenxi,Chen Kechun,Wang Wei,Yang Liming,Hou Zhaohui
Recently, hollow carbon spheres (HCS) have aroused great interests in the field of energy storage and conversion owing to their unique morphology, structure and other charming properties. Nevertheless, unsatisfactory electrical conductivity and relatively poor volumetric energy density caused by inevitable gaps between discrete carbon spheres greatly impede the practical application of HCS. In this work, for the first time we propose a novel dual-template strategy and successfully fabricate interconnected 3D hollow N-doped carbon network (HNCN) by a facile and scalable pyrolysis process. By systematical characterization and analysis, it can be found that HNCN is assembled by HCS and lots of mesoporous carbon. Compared to the counterparts, the obtained HNCN exhibits unique 3D interconnected architecture, larger specific surface area, hierarchical meso/macropore structure, higher structure defects, higher N doping amount and more optimized N configurations (especially for pyridinic-N and graphitic-N). As a result, these advantageous features endow HNCN with remarkably promoted electrochemical performance for supercapacitor and oxygen reduction reaction. Clearly, our proposed dual-template strategy provides a good guidance on overcoming the intrinsic shortcomings of HCS, which undoubtedly broadens their application in energy storage and conversion.
✓ 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）