ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Lin-Lin Zhang,Huan-Huan Li,Yan-Hong Shi,Chao-Ying Fan,Xing-Long Wu,Hai-Feng Wang,Hai-Zhu Sun,Jing-Ping Zhang
In this paper, gelatin as a natural biomass was selected to successfully prepare an oxygen-enriched carbon with layered sedimentary rocks structure, which exhibited ultrahigh-rate performance and excellent cycling stability as supercapacitors. The specific capacitance reached 272.6 F g–1 at 1 A g–1 and still retained 197.0 F g–1 even at 100 A g–1 (with high capacitance retention of 72.3%). The outstanding electrochemical performance resulted from the special layered structure with large surface area (827.8 m2 g–1) and high content of oxygen (16.215 wt %), which effectively realized the synergistic effects of the electrical double-layer capacitance and pseudocapacitance. Moreover, it delivered an energy density of 25.3 Wh kg–1 even with a high power density of 34.7 kW kg–1 and ultralong cycling stability (with no capacitance decay even over 10 000 cycles at 2 A g–1) in a symmetric supercapacitor, which are highly desirable for their practical application in energy storage devices and conversion.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2022
·Vol. 40
·期 22
·2701-2711
·
IF 5.56
Shuangyan Meng,Li Li,Hui Xi,Jing Yang,Ting Xiao,Rui Zuo,Xueqing Xu,Ziqiang Lei,Zhiwang Yang,Qunji Xue
Comprehensive Summary A series of nickel-doped copper tungstate/oxygen-rich TiO 2 heterojunction-constructed composites of x Ni-CuWO 4 /OTiO 2 were successfully prepared to demonstrate the enhancement of the visible-light photoactivity through promoting the photogenerated charge carrier separation efficiency. Of all these composites, 0.2Ni-CuWO 4 /OTiO 2 exhibits excellent and stable visible light photoactivity for the photooxidative coupling of benzylamine to the corresponding N -benzyl-1-phenymethanimine (BPMI) in air atmosphere. The conversion of benzylamine and the selectivity to BPMI reach 97% and 99%, respectively. The catalyst shows good cyclability with the conversion of benzylamine decreasing just by 22% after being repeated six times with the well-maintained selectivity of BPMI. The composite also exhibits excellent photo-bactericidal ability, which greatly inhibits the reproducing of both the Gram-positive bacteria ( e.g ., S. epidermidis ) and Gram-negative bacteria ( e.g ., E. coli ).
研究领域:
材料科学
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环境科学
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微生物学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xiaomin Qiu,Chaoting Deng,Xiaoyu Cao,Hengjun Gai,Hongbing Song
In this work, choline fluoride, choline chloride, and 2-fluoroethyl-trimethylammonium bromide containing –F, –Cl, and –Br structures were used as hydrogen bond receptors. Acetamide, urea, trifluoroacetamide, xylitol, ethylene glycol, malonic acid and lactic acid containing –HN 2 , –COOH, –OH, and –F structures were used as hydrogen bond donors. We constructed functional deep eutectic solvents rich in hydrogen bond donors and acceptors while providing alcohol hydrogen bond attraction sites and aldehyde and ketone hydrogen bond attraction sites. The efficient separation and enrichment of trace alcohols, aldehydes, and ketones in Fischer-Tropsch (F-T) oil products were achieved through hydrogen bond interaction. The mechanism of selective extraction of different types of oxygenated compounds by functionalized deep eutectic solvents was revealed, and the linear relationship among structure, hydrogen bond descriptor, and extraction performance was clarified through quantum chemistry calculations. Further, liquid–liquid extraction was used to extract and separate the oxygenated compounds from high-temperature F-T oil products using the synthesized functional deep eutectic solvent. The experimental results showed that propanol, butyraldehyde, and methylethylketone could be extracted simultaneously and efficiently, and the solvent effects were consistent with the results of quantum chemistry calculation. The excellent extraction and separation effects were due to the large number of hydrogen bonds and oxyphilic atomic forces of deep eutectic solvents. The modern solvent was reasonably designed, which is significant for extracting different oxygenated compounds from high-temperature F-T oil products.
研究领域:
化学工程
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yangqi Gan,Gui Chen,Yafei Sang,Fa Zhou,Ruilin Man,Jianhan Huang
Herein oxygen-rich hyper-cross-linked polymers with hierarchical porosity were developed via two continuous Friedel-Crafts reactions. Their aniline adsorption was evaluated from aqueous solution. It indicated that the first Friedel-Crafts reaction introduced plentiful oxygen (O) on the polymers with the O content of 12.53 wt%. The second Friedel-Crafts reaction produced predominated micropores with micropore area over the Brunauer-Emmett-Teller (BET) surface area of 56.8%, the hierarchical porosity including micropores, mesopores, and macropores were characteristic for the as-fabricated polymers. The aniline adsorption was largely improved on the synthesized polymers, in which the maximum capacity was 178.4 mg/g at 303 K as the introduced O and the manufactured micropores were greatly beneficial for the adsorption. The Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy demonstrated that the introduced O as a functional of the C O, C O, and O H groups strongly interacted with aniline. More importantly, 80 min was sufficient to reach the equilibrium, 0.6 g the polymers made the aniline solution (<40 mg/L) meet the discharge requirement of Chinese environmental protection authorities (<5 mg/L).
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Dan Zhao,Xianfa Zhang,Wenjing Wang,Lili Sui,Chuanyu Guo,Yingming Xu,Xin Zhou,Xiaoli Cheng,Shan Gao,Lihua Huo
Real-time detection of herbicides has been a challenge for the application of metal oxide gas sensors. In this paper, we report the application of TiO 2 sensors with oxygen vacancies for the detection of isopropylamine . Spherical structure with oxygen vacancies was successfully prepared by a simple one-step hydrothermal method combined with ionic liquid as morphology regulator. The morphology and structure of the materials were analyzed using XRD, SEM and TEM. Further studies reveal that the oxygen vacancies in this material play an important role in the detection of isopropylamine. The sensor exhibits excellent selectivity, moisture resistance and long-term stability. The response is 61.7–100 ppm isopropylamine, along with fast response time of 22 s. It is noteworthy that the lower limit of detection for isopropylamine can reach 0.2 ppm, which is very meaningful to practical application of detecting gas residues. The excellent performance can primarily be attributed to the formation of abundant oxygen vacancies into the material, which increases the adsorption capacity of gas molecules. This new sensing design strategy offers a vital reference to extend the application of non-metallic elements doped metal oxide semiconductors .
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yue Meng,Zhiling Huang,Di Liu,Bo Xie,Ying Guo,Shengjie Xia
In this paper, based on oxygen rich vacancies Bi 2 WO 6 -Ov@CoFe-LDHs heterojunction (BWO-Ov@LDHs), which can efficiently activate PS under visible light, BWO-Ov@LDHs/PS material system was fabricated for efficient degradation of tetracycline (TC). After 30 minutes photodegradation, the removal of TC by BWO-Ov@LDHs/PS reached 93.4 %, which is 2.9–3.1 times than that of pure PS and BWO-Ov@LDHs. Based on band structure, XPS result and theoretical calculations such as work function and differential charge density, it indicates that the Z-scheme heterojunction accelerates the transfer and conversion of electrons, and the activation of persulfate ions generates sulfate radicals, enhancing the photocatalytic performance, the variable valence state further strengthens the generation of sulfate radicals, and the tripartite synergy promotes the efficient photocatalytic degradation of TC. The results based on LC-MS provided the intermediate products and pathways of the degradation process, while toxicity analysis showed that the toxicity of intermediate products was lower.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhi-Qiang Wang,Biao Zeng,Dan Zhou,Lu Tai,Xiao-Dong Liu,Woon-Ming Lau
Sodium ion battery (SIB) is considered as one of the most promising alternatives to Lithium ion battery (LIB) for large-scale energy storage, but wide usages of SIB are hindered by the lack of suitable anode materials with long cycling lifespan and high-rate capacity. With the merits of high theoretical specific capacity, preferable environmental benignity and wide resources availability, FeSe 2 -based materials have recently emerged as an attractive choice of SIB anode materials. In this work, a novel rich-oxygen-doped FeSe 2 nanosheets (O-FeSe 2 NSs) was constructed as a high-performance anode material for SIB. Substantially, the rich O on O-FeSe 2 NSs effectively promotes the active material and its intermediate reaction products to form an amorphous phase during cycling and hence alleviates the electrode’s volume expansion which usually causes poor cycling stability. Besides, the rich O atoms enables the formation of stable Solid electrolyte interface (SEI) as well as fast diffusion rate of Na + , and therefore enhances the cycling life of the electrode. In addition, the unique sheet structure with rich O atoms endows O-FeSe 2 NSs with super-high pseudocapacitance capacity which facilitates high-rate capabilities. Consequently, the O-FeSe 2 NSs electrode displays prolonged cycling life and high-rate capacity with a large specific capacity of 268.4/268.6 mAh g −1 which is kept even after 700 cycles under the current density of 1.0 A g −1 . Combined with detailed survey of electrochemical storage mechanism and Na + diffusion kinetics, the present work is expected to provide a new research idea of FeSe 2 -based anode materials and motivates a deep understanding of the Na-storage in the O-FeSe 2 NSs host for rechargeable SIB.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Zhoujing Yang,Xiaqing Chang,Hongyu Mi,Zhiyu Wang,Juntao Gao,Xiaoqiang Xiao,Fengjiao Guo,Chenchen Ji,Jieshan Qiu
The lack of cathode materials with satisfactory Zn 2+ storage capability substantially hinders the realization of high-performance aqueous zinc-ion hybrid capacitors (ZHCs). Herein, we propose a facile KMnO 4 template-assisted KOH activation strategy to prepare a novel oxygen-enriched hierarchically porous carbon (HPC-1-4). This strategy efficiently converts coal tar pitch (CTP) into a well-tuned carbon material with a large specific surface area of 3019 m 2 g −1 and a high oxygen content of 9.20 at%, which is conducive to providing rich active sites, rapid charge transport, and appreciable pseudocapacitance for Zn-ion storage. Thus, the as-fabricated HPC-1-4-based aqueous ZHC exhibits prominent performance, including a high gravimetric capacity (206.7 mAh g −1 at 0.25 A g −1 ), a remarkable energy density (153.4 Wh kg −1 at 184.2 W kg −1 ), and an impressive power output (15240 W kg −1 at 63.5 Wh kg −1 ). In-depth ex-situ characterizations indicate that the excellent electrochemical properties of ZHCs are due to the synergistic effect of the Zn 2+ adsorption mechanism and reversible chemisorption . In addition, the assembled quasi-solid-state device demonstrates excellent electrochemical stability of up to 100% capacity retention over 50000 cycles, accompanied with a desirable energy density of 115.6 Wh kg −1 . The facile preparation method of converting CTP into carbonaceous functional materials has advanced the development of efficient and eco-friendly energy storage technologies.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zhaojin Li,Wei Song,Di Zhang,Qiujun Wang,Huilan Sun,Qujiang Sun,Bo Wang
Co-free Li-rich Mn-based cathode materials (Co-free LRMOs) have become one of the most promising cathode materials in lithium-ion batteries for the next generation due to their low cost, high capacity, and environmental friendliness. Under high voltage, redox reactions involving anions can easily lead to various issues, including oxygen release, dissolution of transition metal elements (TMs), and structural collapse in these materials. The absence of the Co element further exacerbates this issue. Here, a simple one-step solid-phase reaction strategy is proposed to achieve nanoscale dual modification of the Co-free LRMOs with F and Tb doping. The dual modification has a relatively small impact on the cell parameters and Li+ diffusion ability of the LRMOs, leading to no significant improvement in its rate performance. The modified LRMOs only exhibited discharge capacities of 220.7, 200.1, 140.0, 115.5, and 90.9 mAh·g–1 at 0.1, 0.2, 1.0, 2.0, and 5.0 C, respectively. However, the modified Co-free LRMOs exhibit extremely strong structural stability and retain 95.1% of the initial capacity after 300 cycles, so far, the highest capacity retention rates among all Ni/Mn-based Li-rich materials. Mechanism studies have shown that the enhancement in structural stability of the Co-free LRMOs is attributed to the increased concentration of oxygen vacancies and Ni3+ ions through F doping. Furthermore, Tb doping not only hinders the release of O2 but also enhances the Li+ migration and electronic conductivity coefficient of the LRMOs.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 45
·25794-25801
·
IF 2.936
Jianhui Li,Lidan Xing,Zaisheng Wang,Wenqiang Tu,Xuerui Yang,Yilong Lin,Yuqing Liao,Mengqing Xu,Weishan Li
The capacity fading of layered lithium-rich oxide (Li1.2Mn0.54Ni0.13Co0.13O2, LLO) cathodes greatly hinders their practical application in next generation lithium ion batteries. It has been demonstrated in this work that the slow capacity fading of a LLO/Li cell within 120 cycles is mainly caused by electrolyte oxidation and LLO phase transformation with Ni dissolution. After 120 cycles, the dissolution of Mn becomes worse than that of Ni, leading to structural destruction of the generated spinel phase structure of LLO and fast capacity fading. Tripropyl borate (TPB) is proposed as a film-forming electrolyte additive, which shows a great capability to enhance the cycling stability of LLO/Li, with a capacity retention improvement from 21% to 78% after 250 cycles at 0.5C. Electrochemical and physical characterization demonstrated that the TPB-derived SEI film shows great capability to suppress electrolyte oxidation and the structural destruction of the generated spinel phase of LLO.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Hui Cai,Meng Rong,Siqi Liang,Qike Wang,Qiyu Meng,Shan Ni,Huizhou Liu,Liangrong Yang
Efficient recovery of rare earth elements (REEs) from wastewater is crucial for environmental remediation and the sustainable development of resources. Nevertheless, achieving efficient and selective REEs extraction in the systems containing low-concentration REEs and high-concentration competing metal ions remains a challenge. Here, we report on the fabrication of two-dimensional defective carbon nitride (DGCN-K) with extended nanoporous furnished oxygen-enriched sites, which is achieved through re-arrangement of framework structural unit using a flexible polycondensation-ion-thermal strategy. The extended nanoporous and continuous transmission nanochannels establish a dedicated structure microenvironment surrounding the active sites center, promoting the effective ion diffusion and increasing the accessibility of active sites. Meanwhile, the incorporation of abundant electronegative cyano and hydroxyl group modifies coordination microenvironment, improving hydrophilicity and strengthening interaction affinity with REEs. Consequently, DGCN-K shows excellent REEs adsorption performance, achieving high adsorption capacity (Nd(III) 146.25 mg/g, Dy(III) 180.82 mg/g, Lu(III) 204.34 mg/g,) within short adsorption equilibrium time (30 min). Furthermore, DGCN-K possesses high REEs selective removal rate in the mixed binary system and actual leaching tailings. This study provides a feasible microenvironment regulation strategy for the construction of 2D defective carbon nitride with oxygen-enriched sites and extended nanoporous for synergistically enabling efficient recovery of REEs.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·Vol. 20
·期 23
·2307292
·
IF 13
Yongjian Li,Xinyu Zhu,Yuefeng Su,Lifeng Xu,Lai Chen,Duanyun Cao,Ning Li,Feng Wu
Layered Li-rich oxide cathode materials are capable of offering high energy density due to their cumulative cationic and anionic redox mechanism during (de)lithiation process. However, the structural instability of the layered Li-rich oxide cathode materials, especially in the deeply delitiated state, results in severe capacity and voltage degradation. Considering the minimal isotropic structural evolution of disordered rock salt oxide cathode during cycling, cation-disordered nano-domains have been controllably introduced into layered Li-rich oxides by co-doping of d 0 -TM and alkali ions. Combining electrochemical and synchrotron-based advanced characterizations, the incorporation of the phase-compatible cation-disordered domains can not only hinder the oxygen framework collapse along the c axis of layered Li-rich cathode under high operation voltage but also promote the Mn and anionic activities as well as Li + (de)intercalation kinetics, leading to remarkable improvement in rate capability and mitigation of capacity and voltage decay. With this unique layered/rocksalt intergrown structure, the intergrown cathode yields an ultrahigh capacity of 288.4 mAh g −1 at 0.1 C, and outstanding capacity retention of ≈90.0% with obviously suppressed voltage decay after 100 cycles at 0.5, 1, and 2 C rate. This work provides a new direction toward advanced cathode materials for next-generation Li-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）