Journal of Energy Storage
·
2022
·
IF 8.907
Li Lu,Qianqian Xu,Yeke Chen,Yujie Zhou,Tingshun Jiang,Qian Zhao
A new type of layered multi-space composite material was synthesized by solvothermal method based on the spindle shape of FeCo-MIL-88 sulfide, nickel sulfide and nickel oxide (Fe .92 Co .08 S@NiS/NiO). The morphology and structure of the hybrid were studied by SEM, TEM, XRD and XPS. The lamellar structure provided a large gap for effective electron transfer, and the composite showed significant electrochemical properties. This includes excellent specific capacitance (1868 F·g −1 at 1 A·g −1 ) and significant cycle stability (the specific capacitance remains at 62.5% after 5000 cycles). In addition, when the asymmetric supercapacitor is 251.1 W·kg −1 , the energy density is 38.2 Wh·kg −1 , and the cycle stability is excellent after 5000 cycles, and the capacity retention rate is 85.3%. The results show that Fe .92 Co .08 S@NiS/NiO composite electrode has potential application in high performance supercapacitors. This new material has strong competitive potential in high-performance ultracapacitor electrode materials.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 37
·19852-19858
·
IF 14.511
Yunlong Zhang,Yanan Li,Xiaoshan Wang,Xiaoling Teng,Lu Guan,Hao Yang,Zhengqiu He,Yi Wan,Shiwei Guo,Han Hu,Mingbo Wu
The introduction of redox mediators, for example lithium iodide (LiI), into the catholyte of lithium-ion capacitors (LICs) could provide extra capacity through the iodide-involved redox reactions, allowing an alternative strategy to balance the huge capacity gap between the cathode and anode. Nevertheless, the formidable shuttle effect of the soluble mediators results in deteriorated cycling life. Herein, a metal–organic framework (MOF) interlayer is introduced to prohibit shuttling via physical obstruction and mild chemical attraction. After loading the MOF particles on the separator, the micropore of the MOFs could restrict the intragranular diffusion of the redox mediators while their intergranular migration could be prohibited by the mild chemical adsorption exerted by the MOF particles. The electrochemical evaluation reveals that the employment of the MOF-modified separator could boost the coulombic efficiency and cycling life of the activated carbon (AC) cathode with the LiI-included catholyte. Based on this discovery, a LIC was constructed by pairing the AC cathode with the LiI-involved catholyte and nanostructured Li2TiSiO5 anode at the same mass loading where the MOF-modified separator is employed to prohibit the shuttle of iodine species. Because of the synergistic effects, such a LIC could offer a high energy, large power density, and long cycling life.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Heyu Li,Minghua Liu,Wenqi Zou,Yuancai Lv,Yifan Liu,Lihui Chen
In this study, Ni-metal–organic frameworks (MOFs) were used as precursors to obtain carbon-supported nickel composites (Ni@C) after calcination. The hydrodeoxygenation properties of the model compound and corncob lignin were investigated without an external hydrogenation source and initial pressure. Additionally, the effect of Ni@C on degradation of model compounds, corncob lignin, and benzyl phenyl ether (BPE) under different conditions was examined. The results showed that with isopropanol as the in situ hydrogen source, the conversion percentage of BPE was 90.2% and the yield of phenol was 88.3 wt % at 150 °C. The catalysts were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), NH3 temperature-programmed desorption (NH3-TPD), X-ray photoelectron spectroscopy (XPS), and thermogravimetry (TG), and the lignin and bio-oil were characterized by gas chromatography–mass spectrometry (GC–MS) and two-dimensional heteronuclear single quantum coherence (2D-HSQC). It was found that the Ni@C catalyst with well dispersion, high support rate, and rich acid sites was successfully synthesized. In the process of degradation, the C–O ether bond in the structure of lignin was successfully broken to generate the phenolic monomer, and the high-efficiency hydrodeoxygenation of lignin was realized under mild conditions.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Jianghui Liu,Juan Cui,Jianfeng Gao,Huahua Guo,Xu Chai
In this study, activated carbon operated by microwave (MW) pretreatment and further MW regeneration was used to remove sulfachloropyridazine (SCP) to explore the influence of MW on activated carbon. The results reveal the adsorption capacity (q e , exp ) of pretreated activated carbon (PAC) was double that of the original activated carbon (OAC). With an increase in adsorption/MW times, the q e , exp of regenerated activated carbon (RAC) did not change much. Through Brunauer-Emmett-Teller (BET) analyses, the Micropore volume of PAC (V micro = 0.4035 cm 3 g −1 ) was higher than that of OAC (V micro = 0.1548 cm 3 g −1 ), this indicated that PAC creates a large number of micropores as a result of MW pretreatment. Also, S BET of RAC kept within a stable range (824.97–868.88 cm 2 g −1 ), and S BET of 6th-RAC was still as high as 861.18 m 2 g −1 after 6 continuous adsorption/MW cycles, which indicated the activated carbon restored stable properties after multiple microwave regeneration.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Composites Science
·
2022
·Vol. 6
·期 2
·55
·
IF 0
Tao Wen,Baotao Huang,Li Zhou
Activated carbon (AC) has been widely utilized for the adsorption of pollutants from water. However, it is difficult to recycle the AC after adsorption. In this paper, we report a facile one-pot approach to fabricate magnetic poly(vinyl alcohol)/AC composite gel (mPVA/AC CG) by dropwise addition of an aqueous mixture of PVA, AC and iron ions into the ammonia solution. The obtained mPVA/AC CG after freeze-drying shows porous microstructure and favorable magnetic properties. The utilization of mPVA/AC CG for adsorptive removal of methylene blue (MB) and methyl orange (MO) dyes from water was investigated. The mPVA/AC CG not only exhibited good adsorption performance for both MB and MO dyes but also could be readily recycled using a magnet after adsorption. The adsorption process was well described by the pseudo-second-order kinetic model and the Langmuir isotherm model. Considering the simple fabrication process, good adsorption performance and favorable magnetic separation capability, this work provides a viable strategy for combining the features of AC and magnetic gel for fabrication of applicable magnetic adsorbent.Keywords:magnetic gel;activated carbon;adsorption;dye;methylene blue;methyl orange
✓ 已验证
产品关联
DOI
Water
·
2022
·Vol. 14
·期 4
·630
·
IF 3.53
Haibing Zhang,Yasong Zhou,Shaohui Guo,Zhipu Wang,Qing Wang
The efficient mineralization of high-concentration aqueous aniline (HCAA) is an issue needing to be resolved. In this study, a hybrid process of ozonation and electrochemical oxidation (ECO) was proposed for improving the mineralization of HCAA (1000 mg·L−1). The results indicated that chemical oxygen demand (COD) removal by the hybrid process was far greater than that of a single ozonation or ECO process, revealing that the hybrid process might avoid low efficiency in late ozonation and initial ECO. Thus, a subsequent combination effect clearly existed. In this hybrid process, ozonation stage time was selected as 60 min for optimal COD removal. The main products of the ozonation stage were maleic and succinic acids, with declining pH which was beneficial to the following ECO stage. Nitrite and nitrate formed during ozonation, which acted as electrolytes for the ECO stage, in which maleic and succinic acids were fully degraded and pH thus increased. Moreover, the aniline degradation mechanism of the hybrid process was deduced, demonstrating the superiority of this hybrid process. Finally, more than 95% COD removal was achieved, which met the COD limit requirement and achieved pH control simultaneously, according to the discharge standards of water pollutants for dyeing and finishing of the textile industry in China (GB 4287–2012).Keywords:aniline;hybrid process;mineralization;ozonation;ECO
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 8
·4427-4438
·
IF 6.123
Li Fangchao,Miao Gan,Gao Zhongshuai,Xu Ting,Zhu Xiaotao,Miao Xiao,Song Yuanming,Ren Guina,Li Xiangming
The development of a versatile platform that can separate oil/water mixture, remove dye from water, and purify wastewater is extremely desirable, yet still hard to realize. Herein, to address this challenge, a composite hydrogel was produced by freezing–thawing treatment using chitosan, polyvinyl alcohol, and carbon black as the raw materials. The obtained hydrogel displayed both slippery oil-repellency and water-affinity in air, underwater, when submerged in oil, and exploiting this special wettability, the hydrogel coated mesh can be used to separate oil/water mixtures efficiently. After 25 oil–water separation cycles, the hydrogel-coated filter still had a separation efficiency of over 98%. With its superhydrophilicity and active functional groups, the resulting hydrogel was able to absorb dye molecules dissolved in water effectively. Due to the photothermal effect of carbon black, the local temperature of the hydrogel was increasing quickly under sunlight illustration, which allowed it to be an advanced platform for daily wastewater purification through solar distillation. Graphical abstract A versatile hydrogel platform for oil–water separation, dye adsorption, and domestic wastewater purification was developed.
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2022
·Vol. 9
·期 9
·e202200301
·
IF 4.782
Shuang Xia,Wen Huang,Wenqi Yan,Xinhai Yuan,Xi Chen,Lili Liu,Lijun Fu,Yusong Zhu,Qinhong Huang,Yuping Wu,Teunis van Ree,Rudolf Holze
Graphical Separators for advanced Li−S batteries were prepared using spherical rutile TiO 2 with oxygen vacancies and three-dimensional interconnected graphene-like carbon. As an advanced energy-storage system, Li−S batteries have attracted much attention, but there is still a series of problems hindering their commercialization, such as the ‘shuttle effect’ and corrosion of lithium anodes. To alleviate these two important problems simultaneously, we modified the separators with spherical rutile TiO 2 with oxygen vacancies (abbreviated OT) and three-dimensional interconnected graphene-like carbon (abbreviated GC) for advanced Li−S batteries to improve the electrochemical performance. The modified separators (abbreviation OTCD) have low charge transfer impedance, a catalytic effect on polysulfides, and a barrier effect on polysulfides, which can suppress the ‘shuttle effect’ and prevents the corrosion of lithium anodes in Li−S batteries. The as-prepared Li−S batteries show good cycling stability for 250 cycles with 0.048 % capacity decay per cycle at 1 C. Moreover, the SEM images of lithium anodes after 50 cycles showed that the lithium anodes were uncorroded. This work provides a practical and effective reference for the advanced Li−S batteries.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xinghua Wu,Kaicheng Wang,Junting Zhang,Xiaohua Jie,Zhong Chen,Yuekun Lai
In this study, we fabricated a sprayable polyester-SiO 2 anti-condensation coating. The coating exhibited superhydrophobicity and condensation resistance at various sub-cooled temperatures. We found that the number of nucleation sites is greatly related to surface energy and dynamic growth of droplets. Besides, different droplet-jumping events were observed on the superhydrophobic surfaces under different relative humidity (RH). Droplet-jumping events of 50 times were observed under 48% RH in an 11-min cooling period, which is five-times higher than those under other relative humidity conditions. To avoid contamination triggered nucleation events, anti-fouling property, a key factor of an anti-condensation surface, was also studied. Oil repellence and contamination tests verified the good anti-fouling property of our coating. The resistance of our coating to scratches has been investigated by nano-indentation, cross-cut adhesion, and sandpaper abrasion tests. Compared with other reported anti-condensation coatings, our coating proved to be better than previously reported anti-condensation coatings. Our work opens significant research and market opportunities for the widely used polyester coatings in anti-condensation applications.
✓ 已验证
产品关联
DOI
高影响因子
E-POLYMERS
·
2022
·Vol. 22
·期 1
·357-369
·
IF 3.074
Xing Huang,Guomin Song,Jianjun Shi,Jiafei Ren,Ruilu Guo,Chunyuan Li,Guangxin Chen,Qifang Li,Zheng Zhou
Octa(dimethylethoxysiloxy) POSS (ODES) was synthesized successfully and used as the novel curing agent to prepare RTV silicone rubber (SROD) with outstanding mechanical properties and thermal stability. Compared with the silicone rubber cross-linked by tetraethoxysilane (SRTE), the novel RTV silicone rubber using octa(dimethylethoxysiloxy) POSS as a cross-linker had better mechanical, thermal, and optical properties. The highest tensile strength of SROD reached 1.26 MPa, which is three times that of SRTE. Besides, the decomposition temperature of 10% weight loss reached 507.7°C, exceeding that of SRTE by nearly 150°C. In addition, it was remarkable that due to the good compatibility of ODES with the silicone rubber matrix, the series of SROD showed good transmittance, greater than 87%. The thermal decomposition process of SROD was investigated by TGA coupled with real-time FTIR, and the results revealed the rigid structure and large steric hindrance of ODES that efficiently blocked the “backbiting” of the polysiloxy chains and delayed the end-induced ring decomposition, and consequently, improved the thermal stability of SROD significantly.
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE COMMUNICATIONS
·
2022
·
IF 1.934
Yan Zhao,Guangjian Xing,Hexuan Liu,Wenting Zhang,Qingjun Liu,Chang Zhao,Yan Li,Yanyan Wang
Molybdenum disulfide (MoS 2 ) film has been successfully deposited within a three-dimensional (3D) graphene aerogel (GA) by a magnetron sputtering method to facilely construct MoS 2 /GA composite as a high-performance electrode material of supercapacitor . Through cyclic voltammetry , constant current charge/discharge and electrochemical impedance spectroscopy tests of three-electrode supercapacitor, the electrochemical performance of the MoS 2 /GA composite was evaluated, demonstrating specific capacitances of 187.3 and 175.0 F g −1 at 0.5 and 1 A g −1 , respectively. When cycles 1000 times under the condition of 2 A g −1 , the capacitance retention remains 93.5%. The excellent electrochemical properties of MoS 2 /GA were attributed to the effective structural integration of MoS 2 film and graphene sheets achieved with the magnetron sputtering process, which can further develop other GA-based composites as a feasible technique. The as-prepared MoS 2 /GA with outstanding performance in this work has a promising prospect in supercapacitor application.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Jingyu Qian,Jing Mo,Yukang Zhou,Mengjie Fan,Yingwen Chen,Jining Liu,Yuan Xu,Shubao Shen
Catalytic oxidation at room temperature is a promising alternative approach for indoor formaldehyde elimination. However, the development of non-precious metal room temperature catalysts is still highly challenging. In this study, manganese-cerium composite oxides (MC) were developed and optimized. The removal performance of low concentrations of formaldehyde at room temperature was comprehensively evaluated. Formaldehyde removal was achieved with MC under dark at a level comparable to that of the commercial P25 catalyst. The removal efficiency of 90.9% in 24 h at room temperature was obtained for the initial formaldehyde concentration of 1.2 ± 0.1 ppm. Using electron paramagnetic resonance spectroscopy , free radicals were confirmed to play a key role in formaldehyde degradation on MC. Formate was detected as the main intermediate product by in situ DRIFTs, and the mechanism of MC catalytic oxidation at room temperature was deduced.
✓ 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）