MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Ni Wang,Ziwei Deng
The clean-up of oil spills is a worldwide challenge for the prevention of serious environmental pollution. Therefore, it is imperative to develop materials for oil-spill cleanup that have high absorption/separation capacity, good selectivity, controlled collection and easy recyclability. Here, we present a facile and low-cost approach for fabricating magnetic, durable, and superhydrophobic carbon sponges. The resultant carbon sponges feature fast magnetic response, excellent superhydrophobicity/superoleophilicity, high chemical resistance, environmental stability and mechanical durability, as well as high oil/water separation efficiency and oil absorbency. More importantly, given the magnetically controllable property endowed by magnetic particles to superhydrophobic carbon sponges, which act as magnetically controlled “smart absorbents”, the carbon sponges can therefore controllably and selectively adsorb oils from oil-water mixtures. Thus, our strategy may open up a new avenue for developing magnetic responsive intelligent oil sorbent materials suitable for practical applications in the fields of water remediation, oil spill clean-up and oil recovery.
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
Polymers
·
2023
·Vol. 15
·期 3
·521
·
IF 5
Ying Leng,Kai Jin,Tian Wang,Hui Sun
The facile preparation of non-noble metal nanoparticle loaded carbon nanomaterials is promising for efficient oxygen reduction reaction (ORR) electrocatalysis. Herein, a facile preparation strategy is proposed to prepare nitrogen-doped carbon sponge loaded with fine cobalt nanoparticles by the direct pyrolysis of the cobalt ions adsorbed polymeric precursor. The polymeric sponge precursor with continuous framework and high porosity is formed by the self-assembly of a poly(amic acid). Taking advantage of the negatively charged surface and porous structure, cobalt ions can be efficiently adsorbed into the polymeric sponge. After pyrolysis, fine cobalt nanoparticles covered by carbon layers are formed, while the sponge-like structure of the precursor is also well-preserved in order to give cobalt nanoparticles loaded nitrogen-doped carbon sponges (Co/CoO@NCS) with a high loading content of 44%. The Co/CoO@NCS exhibits promising catalytic activity toward ORR with a half-wave potential of 0.830 V and a limiting current density of 4.71 mA cm−2. Overall, we propose a facile polymer self-assembly strategy to encapsulate transition metal nanoparticles with high loading content on a nitrogen-doped carbon sponge for efficient ORR catalysis.Keywords:nitrogen-doped carbon sponge;oxygen reduction reaction;self-assembly;cobalt nanoparticle
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemElectroChem
·
2021
·Vol. 8
·期 24
·4781-4789
·
IF 4.59
Keyan Wei,Hongmei Zheng,Jingting Hou,Zeming Tang,Jing Zheng,Qingxue Lai,Yanyu Liang
Graphical Soak it up : In situ activation/dedoping induces conversion to produce high-activity and high-density defective carbon materials, which are used to enhance oxygen reduction performance. The N-dedoping-based defect engineering strategy has been designed as an efficient method to develop advanced defective carbon electrocatalysts for the oxygen reduction reaction (ORR). However, the defective structures, especially the defect density of carbon materials fabricated by this method, were significantly suppressed by the limited N doping level. Herein, an in situ activation/N-dedoping strategy was proposed to fabricate a controllable defective carbon sponge (DCS) for ORR electrocatalysts, during which a Schiff-base polymer with a high N content was employed as the carbon precursor and N source while zinc oxide (ZnO) nanoparticles were the thermally removable structure template and activator. As a result, the optimized DCS1100 with a high specific surface area of 1198 m 2 /g and a low nitrogen content of 2.81 at.% delivered a comparable activity and four-electron selectivity but superior stability to commercial 30 % Pt/C in 0.1 M KOH electrolyte.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2019
·
IF 5.714
Zhuo Chen,Alireza Afshari,Jinhan Mo
Phthalates are widely used as additives to consumer products. Many diseases have been shown to be related to the uptake of phthalates. To achieve equilibrium constant phthalate generation for mass transfer and exposure experiments, the present study developed a porous media based method using Teflon generators connected to the media with stainless steel connectors. Carbon sponges with the porosities of 20 ppi (pores per inch), 30 ppi, 40 ppi and honeycomb ceramics of 14 ppi were used as porous media fillers to evaluate the effect of temperature-controlled states, materials, and pore sizes on the generating performance of phthalates. The results showed that 30 ppi carbon sponge fillers at 25.0 ± 0.4 °C performed satisfactorily. DMP, DiBP and DEHP were used as examined phthalates and were generated at 12,800 ± 740 μg/m 3 , 330 ± 13 μg/m 3 and 2.37 ± 0.15 μg/m 3 , respectively. The times to reach stable concentrations were 4.5 h, 18.5 h and 89.5 h, respectively. The reproducibility of DiBP and DEHP delivery deviated by less than 2.4%. Long-term generating experiments should be performed in the future. The porous media based method could stably deliver gaseous PAEs and tends to be widely used in the research of the adsorption of PAEs on surfaces (airborne particles, settled dust and indoor surfaces) and exposure experiments.
研究领域:
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Wenya Hu,Dekui Song,Xiaohu Shi,Lichuan Zhou,Zihan Zhao,Ting Xue,Xinyun Lin,Nan Liu
Neurofeedback training based on brain rhythm is appealing for both cognitive neuroscience and disorder treatment. However, electrodes that can integrate dual functions of recording and feedback without signal compromise still lack. Herein, an anisotropic cellulose carbon sponge (CCS) electrode by tailoring conductivity through the temperature that has the dual ability to record electrophysiological signals and sense pressures as feedback is developed. The electrode is fabricated via a gradient temperature annealing on CCS, which involves lower (300 °C) and higher (1000 °C) temperature treatments, namely CCS-LT and CCS-HT. CCS-LT exhibits perpendicular resilience to the alignment direction of CCS, and CCS-HT possesses lower sheet resistance (≈13 Ω sq −1 ) parallel to the alignment direction. As a pressure sensor, CCS-LT can achieve excellent sensitivity (1.04 kPa −1 ), fast response time (27 ms), and reliable stability for 1000 cycles. CCS-HT can serve as skin electrodes for electrophysiological sensing. The anisotropic functionality of annealed CCS allows it to be used in one sensing and regulation closed-loop system driven by nerves, achieving accurate acquisition of human brain rhythm and machine movement information simultaneously. This not only helps rapid tracking of brain activity but also facilitates feedback regulation to enhance human brain function, having great potential applications in neurofeedback and disease rehabilitation.
研究领域:
生物医学工程
·
神经科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Tianbiao Zeng,Dong Feng,Qimeng Peng,Qi Liu,Guocui Xi,Gang Chen
Among the germanium-based compounds, GeTe is a promising anode candidate that exhibits high theoretical capacity (856 mAh g–1 vs Li+/Li and 401 mAh g–1 vs Na+/Na) and low volume expansion during an ion intercalation/deintercalation process. Nevertheless, achieving good dispersion of metal-like GeTe in anode materials remains a significant challenge. Herein, hybrid GeTe/graphene (GeTe/G) is proposed as a highly efficient anode for LiBs and SiBs by facile ball milling. Pulverized GeTe is effectively anchored on peeled graphene sheets that can accelerate Li+ transport in electrodes as predicted by theoretical calculations and thus result in improved overall electrochemical performance. For instance, GeTe/G possesses a high reversible capacity of 478 mAh g–1 under 0.1 A g–1 in the 300th cycle. Moreover, by further cross-linking the GeTe/G using carbon nanotube (CNT) and carbon nanofiber pyrolysis from cotton cellulose, the as-prepared three-dimensional (3D) flexible anode possesses macropores that acted as positive channels favorably for ion transport. Remarkably, the as-prepared flexible 3D GeTe/G/CNT electrode with a thickness of 1050 μm exhibits a high reversible capacity of 451.4 mAh g–1 (4.38 mAh cm–2) vs Li+/Li and 372.5 mAh g-1 (2.08 mAh cm-2) vs Na+/Na, respectively, in the second cycle under 0.1 A g–1. These results shed some light on the direct application of 3D flexible carbon sponge electrodes in high-performance LiBs/SiBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Qiduo Chen,Shan Tang,Dong Feng,Yuhui Xie,Feng Wu,Delong Xie,Yi Mei,Tianbiao Zeng
As a typical conversion alloyed anode material , Germanium selenide (GeSe 2 ) exhibits isotropic lithiation behavior and high theoretical charge-discharge specific capacity. However, pure GeSe 2 anode faces significant volume expansion (∼250 %−360 %) and further exploration is needed in the preparation of flexible electrode materials and structural design. Herein, a simple strategy is designed to load GeSe 2 /C-2 nanoparticles with porous carbon-coated structure on a flexible cross-networking substrate. The 3D network substrate is composed of highly conductive carbon nanotubes and adhesive cotton cellulose fibers. A two-step method involving coating and cross-linking is designed to achieve the fabrication of self-supporting flexible electrodes. As an anode for LIBs , the one layer GeSe 2 discs with ∼0.65 mm thickness manifest capacities of 827.1, 744.4, 676.3, and 472.9 mAh g −1 at 0.1, 0.2, 0.5, and 1 A g −1 , respectively. This superior Li + storage performance can be attributed to the positive collective impact from the integration of nano-scale material, low crystalline properties, and carbon sponge skeleton. Furthermore, the GITT tests indicate that the diffusion coefficient of Li + in the GeSe 2 -based electrodes ranged from 10 −15 to 10 −12 cm 2 /s, and the thickness of the flexible electrode (including two layers) has a negligible impact on its electrochemical performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
InfoMat
·
2020
·Vol. 2
·期 6
·1225-1235
·
IF 0
Yipeng Chen,Lintong Hu,Caicai Li,Baokang Dang,Qingfeng Sun,Tianyou Zhai,Huiqiao Li
Piezoresistive sensors, as an indispensable part of electronic and intelligent wearable devices, are often hindered by nonrenewable resources (graphene, conventional metal, or silicon). Biomass-derived carbonaceous materials boast many advantages such as their light weight, renewability, and excellent chemical stabilization. However, a major challenge is that the strength and resilience of carbon-based piezoresistive materials still falls short of requirements due to their random microarchitectures which cannot provide sufficiently good stress distribution. Encouraged by the excellent compressible properties and extraordinary strength of the Thalia dealbata stem, we propose a wood biomass-derived carbon piezoresistive sensor with an artificial interconnected lamellar structure like the stem itself. By introducing a freezing-induced assembly process, a wood-based, completely delignified, nano-lignocellulose material can be built into a “bridges supported lamellar” type architecture, where subsequent freeze-drying and pyrolysis results in carbon aerogel monoliths. The resultant bioinspired carbon sponge has high compressibility and strength, of the order of two to five times higher than that of conventional metal, carbon, and organic materials. Combined with excellent biocompatible properties and chemical durability, these are useful properties for intelligent wearable devices and human-motion detection.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
SENSORS AND ACTUATORS A-PHYSICAL
·
2023
·
IF 4.6
Chenhui Bai,Jiedong Zhang,Kun Yang,Zhiyi Zhang,Hulin Zhang
The passivity and stretchability of sensors are the focus of current electronic research, and the main reason for limiting their development is that sensors always require external power supplies and lack enough stretchability. In response to this problem, the development of self-powered sensors is a good solution. In this paper, a self-powered vertical stretchable environment-friendly light intensity sensor has been realized by combining the electrolyte-based thermogalvanic gel and organic carbon sponge that is prepared by making the mixture of carbon nanotubes and polydimethylsiloxane porous. The upper photothermal layer can absorb light effectively and converts it into heat that trigger the lower thermogalvanic layer to send thermovoltage signals. Via the subtle photo-thermal-electric conversion, we can achieve the active monitoring for light intensity due to a strong correlation between output voltages and the light intensity. Further, we have designed a light intensity monitoring platform, through which the user terminal can receive the light intensity information in real time. The passive light intensity sensor may possess potential applications in artificial breeding, artificial planting, energy saving and emission reduction.
研究领域:
材料科学
·
电子工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 16
·7746-7755
·
IF 11.301
Liaoyuan Xia,Le Huang,Yan Qing,Xueqin Zhang,Yiqiang Wu,Wenping Jiang,Xihong Lu
A sandwich-type supercapacitor consisting of self-healing layers and electrode layers can easily delaminate during deformation, thereby seriously affecting its reliability. In this work, a type of omni-healable electrode (denoted as CS@PANa–Fe3+–LiCl) is reported, which completely integrates a three-dimensional (3D) electrode material, a self-healing hydrogel and an electrolyte. Consequently, the ease of delamination and the large contact resistance due to the sandwich-type structure can be effectively overcome. Herein, the 3D porous carbon sponge (CS) serves both as an electroactive material and a carrier for the Fe3+-crosslinked sodium polyacrylate–LiCl (denoted as PANa–Fe3+–LiCl) hydrogel electrolyte. Combining the high electrical conductivity and good capacitance of the CS with the high ionic conductivity and excellent self-healability of the PANa–Fe3+–LiCl hydrogel electrolyte, the omnidirectionally integrated electrode exhibits good electrochemical and mechanical properties as well as excellent self-healing characteristics; furthermore, its capacity retention rate remains high (91.6%) even after five cutting/healing cycles. The as-fabricated CS@PA-SC device exhibits full self-healability, high energy density, good cycling stability, and integration characteristics. This investigation offers a facile and versatile strategy to integrate omni-healable electrodes that can be utilized to construct completely self-healable supercapacitors for wearable electronics.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 5
·1182-1189
·
IF 5.958
Xianglong Huang,Jianhua Deng,Yuruo Qi,Dingyu Liu,Yuanke Wu,Wei Gao,Wei Zhong,Fang Zhang,Shujuan Bao,Maowen Xu
A rechargeable K–Se battery is emerging as an energy storage system because of its much higher specific capacity than that of the traditional alkali metal-ion batteries, but is facing some critical issues and challenges. Exploiting stable and efficient Se-based cathode materials is one of the key points for addressing the intrinsic drawbacks of this new system. Herein, we developed an effective electrode (nitrogen-doped porous carbon sponge) to serve as an advanced electrode for K–Se batteries. The novel electrode presents good multifunctional characteristics, such as efficient confinement of selenium, valid accommodation of volumetric change, stable conductive framework and promotion of fast electron/ion transportation. Accordingly, desirable electrochemical performances are achieved when the as-obtained Se/carbon composite is used as the cathode of K–Se batteries. This work, via smart and efficient electrode design, unfolds a new idea to accelerate the development of advanced K–Se batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Xuke Ma,Longqian Wang,Shuangqing Li,Yafei Zhao,Huishan Shang,Chaoyang Jia,Shisheng Wang,Yifei Zhao,Bing Zhang
Utilizing solar energy for interfacial solar steam generation and wastewater remediation is regarded as one of the sustainable approaches for alleviating clean water shortage. However, it is still a great challenge to comprehend all the requirements of efficient evaporation, salt resistance and wastewater treatment as well as low cost in one evaporator, thus hindering its large-scale practical application. Herein, in this work, an environmentally friendly and low-cost hierarchical porous architecture (APC@TMF) was prepared by assembling potassium citrate activated poplar catkin derived porous carbon (APC) into the porous structure of thermalized melamine formaldehyde resin sponge (TMF) by a simple dipping method. The APC@TMF integrates the advantages of APC and TMF, thus leading to good light absorption, low thermal conductivity, high hydrophilicity and fast water transport. As expected, APC@TMF exhibits a high evaporation flux of 2.28 kg m −2 h −1 with energy conversion efficiency of 96.3 % in seawater, which outperforms TMF, PVA/TMF, PVA/APC and recently reported evaporators. Beyond that, it demonstrates good performance for seawater desalination and wastewater remediation as well as high cost-effectiveness.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 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）