Nanomaterials
·
2020
·Vol. 10
·期 4
·808
·
IF 4.324
Yuhao Liu,Xiaoxiao Qu,Guangxu Huang,Baolin Xing,Fengmei Zhang,Binbin Li,Chuanxiang Zhang,Yijun Cao
Three-dimensional porous carbon is considered as an ideal electrode material for supercapacitors (SCs) applications owing to its good conductivity, developed pore structure, and excellent connectivity. Herein, using longan shell as precursor, 3-dimensional porous carbon with abundant and interconnected pores and moderate heteroatoms were obtained via simple carbonization and potassium hydroxide (KOH) activation treatment. The electrochemical performances of obtained 3-dimensional porous carbon were investigated as electrode materials in symmetric SCs with aqueous and solid electrolytes. The optimized material that is named after longan shell 3-dimensional porous carbon 800 (LSPC800) possesses high porosity (1.644 cm3g−1) and N content (1.14 at %). In the three-electrode measurement, the LSPC800 displays an excellent capacitance value of 359 F g−1. Besides, the LSPC800 also achieves splendid specific capacitance (254 F g−1) in the two electrode system, while the fabricated SC employing 1 M Li2SO4as electrolyte acquires ultrahigh power density (15930.38 W kg−1). Most importantly, LSPC800 electrodes are further applied into the SC adopting the KOH/polyvinyl alcohol (PVA) gel electrolyte, which reaches up to an outstanding capacitance of 313 F g−1at 0.5 A g−1. In addition, for the all-solid-state SC, its rate capability at 50 A g−1is 72.73% and retention at the 10,000th run is 93.64%. Evidently, this work is of great significance to the simple fabrication of 3-dimensional porous carbon and further opens up a way of improving the value-added utilization of biomass materials, as well as proving that the biomass porous carbons have immense potential for high-performance SCs application.Keywords:3-dimensional porous carbon;biomass;high nitrogen content;all-solid-state supercapacitors
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 8
·1809
·
IF 4.2
Yuhong Zhao,Qi Zhang,Zhuhua Gong,Wenlin Zhang,Yun Ren,Qiang Li,Hongjia Lu,Qinhong Liao,Zexiong Chen,Jianmin Tang
In this study, we prepared high-nitrogen self-doped porous carbons (NPC1 and NPC2) derived from the pruned branches and seeds ofZanthoxylum bungeanumusing a simple one-step method. NPC1 and NPC2 exhibited elevated nitrogen contents of 3.56% and 4.22%, respectively, along with rich porous structures, high specific surface areas of 1492.9 and 1712.7 m2g−1and abundant surface groups. Notably, both NPC1 and NPC2 demonstrated remarkable adsorption abilities for the pollutant methylene blue (MB), with maximum monolayer adsorption capacities of 568.18 and 581.40 mg g−1, respectively. The adsorption kinetics followed the pseudo-second-order kinetics and the adsorption isotherms conformed to the Langmuir isotherm model. The adsorption mechanism primarily relied on the hierarchical pore structures of NPC1 and NPC2 and their diverse strong interactions with MB molecules. This study offers a new approach for the cost-effective design of nitrogen self-doped porous carbons, facilitating the efficient removal of MB from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Peng Deng,Qingjie Jiao,Hui Ren
Improving the recovery and utilization efficiency of obsolete energetic materials (EMs) is essential for addressing environmental pollution . In this sense, a sustainable one-step high-temperature carbonization strategy using 2,2′,4,4′,6,6′-hexanitrostilbene-based (HNS-based) energetic hollow nanospheres as energetic precursors was used to fabricate nitrogen-doped (N-doped) porous hollow carbon nanospheres with a high N content. The experimental results suggested carbon-based materials with a hollow spherical framework nanostructure can be obtained by the high-temperature carbonization of energetic precursors. The obtained samples possessed N-doped contents of 19.54 wt% at the carbonization temperature of 600 °C and even 6.10 wt% at 900 °C. In addition, hollow carbon nanospheres with a large number of hierarchical pores and a high surface area (503.5 m 2 /g) were produced at 900 °C. This strategy prevented unnecessary safety risks and improved recovery and utilization efficiency in a more sustainable and economic manner than conventional disposal methods of EMs. Therefore, this work provides a proof-of-principle concept for the fabrication of carbon-based fundamental functional materials from obsolete EMs.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Yusen Chen,Shuzhao Zhang,Xiongcheng Duan,Jia Liu,Hengye Li,Meijie Wei,Wei Wang
The rapid and efficient removal of radioiodine from water is a challenging and meaningful task to safeguard human health. Herein, two calix[4]pyrrole-based polymers were prepared through Mannich reaction between nitrogen-rich 2,4,6-tri(piperazin-1-yl)-1,3,5-triazine (TPT) and two configurational isomers of tetra- meso resorcinol-functionalized calix[4]pyrrole (2α2β-CP and 4α-CP), referred as 2α2β-CP-TPT and 4α-CP-TPT, respectively. The nitrogen contents of 2α,2β-CP-TPT and 4α-CP-TPT were as high as 15.11 % and 14.84 %, respectively. Accompanied by the bowl-shaped calix[4]pyrroles, the CP-TPTs showed high vapor iodine uptake, especially 4.82 g/g for 4α-CP-TPT. More importantly, the CP-TPTs exhibited rapid adsorption kinetics for capture iodine from aqueous phase, with the 2α,2β-CP-TPT at 1 mg/mL level showing a k 2 value as high as 7.374 × 10 −3 g/(mg min). In addition, high iodine adsorption capacity for 2α,2β-CP-TPT and 4α-CP-TPT were achieved to be 1989.6 and 2812.6 mg/g from water, respectively. Even more impressive was the removal efficiency above 98 % in flow-through applications even at flow rate as high as 10 mL/min and in simulated seawater conditions. The CP-TPTs could also exhibit high dynamic iodine adsorption capacity from water as well as excellent stability and outstanding reusability. Adsorption mechanism study discovered the foundational role of the charge transfer interaction on the excellent adsorption performance of the CP-TPTs. All these features demonstrated promising application prospects of the CP-TPTs for iodine removal from water.
研究领域:
环境化学
·
功能高分子材料
·
核素去除
·
吸附科学
·
水污染控制
·
放射化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2025
·
IF 3
Huang Jiaxing,Liu Yumeng,Zhang Liangliang,Li Li,Tan Zhengwen,Zhang Ling,Qiao Zhen-an
Owing to the unique structural characteristics and heteroatom doping as electrode materials for supercapacitor application, nitrogen-doped hollow porous carbon spheres (N-HPCS) have been extensively studied. However, the synthesis of N-HPCS with high nitrogen contents above 15% (mass fraction) is still a great challenge. Herein, an ethylenediamine-assisted co-assembly strategy is used to control the self-assembly between the 2,6-diaminopyridine-glyoxal Schiff base polymer precursor and the silica template, resulting in high N-content N-HPCS. The N-HPCS renders quantitatively controllable shell thickness (7–40 nm), controllable diameter of cavity (270–620 nm), high and adjustable N content (up to 15.1%, mass fraction), as well as a high ratio of beneficial N species (44.5% pyridine N and 36.7% pyridone/pyrrole N). N-HPCS exhibits excellent properties for supercapacitors with a ratio capacitance of 335 F/g at 0.2 A/g, and almost no attenuation of specific capacitance after 3000 cycles at a current density of 5 A/g, showing excellent cycle stability. The as-synthesized N-HPCS with high surface area, hollow structure and high nitrogen content exhibits broad application prospects as an advanced energy storage material.
研究领域:
材料科学
·
纳米技术
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储能
·
电化学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2019
·
IF 4.182
Xiaohuan Qi,Tianquan Lin,Shaoning Zhang,Jijian Xu,Huimin Zhang,Fangfang Xu,Fuqiang Huang
Nitrogen-doped hierarchical porous hard carbon (NPC) that are capable of high N content, high specific surface area and high chemical stability has the potential to be a promising electrode material for energy storage application. Here we report a N-doped hierarchical porous hard carbon via a facile Ti-peroxy initiated in-situ polymerization of p -phenylenediamine. Ti-peroxy can also serve as a hard template to manipulate the formation of hierarchical porous. This nitrogen-doped hierarchical porous hard carbon has advantages of high N-content (7.2 at. %) and high surface area (1515 m 2 g −1 ), displaying a specific capacitance of 360 F g −1 and an extraordinary cycling stability above 98% after 30,000 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Siyu Zhong,Huaizhi Liu,Donghai Wei,Jin Hu,Hang Zhang,Hongshuai Hou,Meixia Peng,Guanhua Zhang,Huigao Duan
An effective design of carbon materials with appropriate nanoarchitecture and optimized physicochemical property is critically demanded for superb lithium/sodium storage capacities. N-rich (up to 15.7%) hollow carbon nanotubes (NCNT) with long aspect ratio are well developed via a template method by exploring polypyrrole as the high nitrogen-containing carbon precursor. Owing to the hollow structure with large cavity and long aspect ratio, the NCNT exhibits Li + /Na + storage capability with favorable volume buffer and rapid ion and electron transfer at high rate, resulting in long-term cycling and high-rate property. Meanwhile, the high N content creates abundant active sites and extrinsic defects, facilitating the improved specific capacity and rate performance. Impressively, our NCNT-600 electrode displays a favorable reversible capacity of 132 mAh g −1 after 5000 cycles at 4000 mA g −1 for SIBs and 170 mAh g −1 after 2000 cycles at the same current for LIBs. Further quantitative kinetic analysis reveals the dominated capacitive contribution of Li + /Na + storage in NCNT, which is attributed to the porous hollow nanotubes and N-rich carbon with volume strain mitigation and enhanced electronic/ionic transfer capability. Given the cost-effectiveness and material sustainability, our work will shed light on the further design of other carbon-based materials for advanced energy storage devices.
研究领域:
材料科学
·
能源存储
·
纳米技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2014
·
IF 3.552
Jing-Chuan Song,Zhong-Yuan Lu,Zhao-Yan Sun
3-Aminophenol/formaldehyde (AF) resin colloidal spheres with narrow size distribution and high nitrogen content are synthesized in the presence of urea. The obtained particles that indicated by transmission electron microscopy (TEM) and field emission scanning electron microscopy (FE-SEM) are spherical morphology and uniform. It can be further carbonized into carbon spheres preserving high nitrogen percent. The particle size is tunable from 300 nm to 850 nm by appropriately varying the concentration of precursor or water/ethanol volume ratio. Even using the water as an only solvent, we can also obtain spherical particles with different size. Typically, the nitrogen percent in the obtained polymer and carbon particles is as high as 10.39 wt% and 8.95 wt%, respectively. The typical surface area of resulted carbon particles obtained from nitrogen adsorption measurement is 459 m 2 g −1 . X-ray diffraction demonstrates the obtained carbon spheres are amorphous , which are expected to have practical application in the field of energy devices. The method can be considered as a low cost and facile method for mass production.
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）