INDUSTRIAL CROPS AND PRODUCTS
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2021
·
IF 5.645
Manman Xu,Anqi Wang,Ying Xiang,Ahsan Ejaz,Junfeng Niu
Developing the unique structure of biomass as a template is beneficial for promoting the commercial application of template-based hierarchical porous carbon materials. Herein, self-template bagasse-based porous carbons with high capacitance performance are successfully synthesized though low-temperature carbonization to fix the original vascular bundle structure of the bagasse and high-temperature activated carbonization to obtain hierarchical porous structures in the tube wall. As electrode materials for supercapacitors, the as-fabricated self-template porous carbons display a high specific surface of 1351.7 m 2 g −1 , abundant oxygen functional groups of 17.33%, an ultrahigh specific capacitance of 418.5 F g −1 at 0.5 A g −1 and a good rate performance of 63.1% at a current density ranging from 0.5 to 10 A g −1 , which is mainly attributed to both natural and synthetic hierarchical porous structures in the obtained samples. Moreover, the self-template bagasse-based porous carbon devices also possess a remarkable energy density of 14.5 Wh kg −1 at 125 W kg −1 and good cycling stability of up to 98.9% after 10,000 cycles at 2 A g −1 . The design strategy described in this work offers a method to further simplify the template synthesis steps, while improving the performance, of biomass-based hierarchical porous carbons. Therefore, these materials can be developed as high capacitance electrodes for energy storage applications.
研究领域:
材料科学
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能源存储
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生物质利用
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Hua Qiang,Mingxing Shi,Keren Lu,Fengyun Wang,Mingzhu Xia
Mesoporous carbon materials hold significant potential in capacitive deionization (CDI) technology owing to expansive accessible surface area, more adaptable pore structure, excellent conductivity properties and effective surface modification and functionalization. While templating is a common method for synthesizing mesoporous carbons, the commonly used hard and soft templating approaches among them suffer from the challenges of expensive precursors and templating agents, complex procedures, secondary contaminants and difficulties in template removal. In contrast, the self-templating method not only circumvents the traditional template removal or combustion steps but also eliminates the use of organic solvents and hazardous chemicals, thus minimizing environmental impact. In this paper, we have successfully synthesized phosphorus-doped mesoporous carbon with a large average pore size (p aver ) using a green and convenient self-templating method employing dual sodium salts of sodium alginate (SA) and sodium phytate (SP). Compared to single SA (6.76 nm) or SP (3.74 nm) self-templated carbonization, the average pore size of carbon materials obtained from dual self-templated carbonization with a proportional mixture (12.97 nm) is significantly improved. The larger average pore size provides a greater surface area for electrode-electrolyte interactions, allowing for easier access and faster diffusion of ions into the pores, thereby enhancing the electrochemical and capacitive deionization properties of the material. The resulting material demonstrates promising electrochemical and desalination performance as evidenced by possessing a specific capacitance of 175.8 A/g and an adsorption capacity of 19.65 mg/g, underlining its potential for application in capacitive deionization utilizing mesoporous carbon materials with large average pore size.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
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IF 6.14
Lijin Huang,Man He,Beibei Chen,Bin Hu
N-doped magnetic porous carbon (N-MPC) is an emerging adsorbent for water pollution control. However, high cost and multisteps procedure make the direct fabrication of N-MPCs difficult until now. Herein, highly dispersed N-MPCs were synthesized by a facial one-pot solid-state pyrolysis strategy. Heating the mixture of ZnO, Co(OH)2, and 2-methylimidazole (HmIm), Zn/Co bimetallic ZIFs formed at the initial stages, being the primary self-template to produce N-MPCs during subsequent high-temperature treatment. By altering the pyrolysis temperature and the molar ratio of ZnO/Co(OH)2 in the precursor, the magnetism, nitrogen content, and surface areas of N-MPCs can be easily controlled. Due to its high special surface areas and the decoration of abundant nitrogen functional groups (pyrrole-N and pyridinic-N), the optimized N-MPC-700-7/3 exhibited a superior adsorption performance for Hg2+ uptake (489 mg g–1). Moreover, the N-MPCs exhibited fast dynamics in adsorption (K2 = 0.47 g mg–1 min–1) and good chemical stability. The simple, sustainable, and impressive method provides an attractive way to manufacture efficiency MPC sorbents, and the prepared N-MPCs merit good application potential in environmental remediation.
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
JOURNAL OF MATERIALS RESEARCH
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2013
·Vol. 28
·期 12
·1582-1588
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IF 1.713
Wenyan Wang,Zhanwei Ma,Runjuan Liang,Tinghua Wu,Ying Wu
SnZn(OH)6 (ZHS) with different morphologies were synthesized by a facile self-templated method at room temperature. It was found that the morphology of ZHS could be controlled by varying the concentration of OH−. The crystalline structure and morphology of the particles were characterized by x-ray diffraction, UV-vis diffuse reflectance spectroscopy, scanning electron microscopy images, and N2 adsorption. The results indicated that the particles had almost uniform monoclinic geometry and uniform size. The photocatalytic activity of ZHS with different morphologies was tested through degradation of Rhodamine B (RhB). Therein, the hollow ZHS showed the highest light catalytic performance due to its large BET surface area, wide band gap, and high crystallinity.
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
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiahui Li,Yangfeng Wang,Mengru Hu,Zhangze Ye,Xiaohua Zheng,Peng Li,Chu Liang
The realization of heteroatom doping can enable carbon functional materials to have superior physiochemical properties via tailoring electron and ion distribution . However, the facile synthesis of heteroatom-doped carbon materials without CO 2 emission from precursor is a major challenge for low-carbon utilization of carbon materials. Herein, we report a facile self–templated method to synthesize boron–doped porous carbon derived from CO 2 based on the new reactions of 2LiBH 4 ·CO 2 with CO 2 . Boron–doped porous carbon is produced via a consecutive reaction between 2LiBH 4 ·CO 2 and CO 2 . The solid intermediate products with porous structure are formed at the first-step reaction. The newly developed porous solid products serve as the template for the chemical vapor deposition of gaseous intermediate products at the second-step reactions. The self-templated mechanism is demonstrated to form porous templates at initial stage for depositing carbon and boron sources on templates to produce boron-doped porous carbon. As a lithium storage material, it delivers a reversible capacity as high as ∼ 1660 mAh/g at 0.2 A/g and ∼ 890 mAh/g at 1.0 A/g after 1200 cycles. This finding opens a low-carbon and self-templated strategy to synthesize heteroatom–doped carbon functional materials from CO 2 .
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2016
·
IF 13.334
Xiuxia Zuo,Yonggao Xia,Qing Ji,Xiang Gao,Shanshan Yin,Meimei Wang,Xiaoyan Wang,Bao Qiu,Anxiang Wei,Zaicheng Sun,Zhaoping Liu,Jin Zhu,Ya-Jun Cheng
Porous silicon has found wide applications in many different fields including catalysis and lithium-ion batteries. Three-dimensional hierarchical macro-/mesoporous silicon is synthesized from zero-dimensional Stöber silica particles through a facile and scalable magnesiothermic reduction process. By systematic structure characterization of the macro-/mesoporous silicon, a self-templating mechanism governing the formation of the porous silicon is proposed. Applications as lithium-ion battery anode and photocatalytic hydrogen evolution catalyst are demonstrated. It is found that the macro-/mesoporous silicon shows significantly improved cyclic and rate performance over the commercial nanosized and micrometer-sized silicon particles. After 300 cycles at 0.2 A g–1, the reversible specific capacity is still retained as much as 959 mAh g–1 with a high mass loading density of 1.4 mg cm–2. With the large current density of 2 A g–1, a reversible capacity of 632 mAh g–1 is exhibited. The coexistence of both macro- and mesoporous structures is responsible for the enhanced performance. The macro-/mesoporous silicon also shows superior catalytic performance for photocatalytic hydrogen evolution compared to the silicon nanoparticles.
研究领域:
材料科学
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能源科学
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催化科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2020
·
IF 7.1
Xurong Qiao,Chao Ma,Xiao Chang,Xiaofang Li,Kun Li,Lei Zhu,Fujun Xia,Qingzhong Xue
One-dimensional cobalt oxide (Co 3 O 4 ) exhibits great potential in gas sensing, but the application is severely hindered because of the agglomeration or close packing during the normal synthesis process. Herein, 3D radial Co 3 O 4 assembled with nanorods is fabricated by employing cobalt-based layered hydroxide metal salt (Co-LHMS) as a self-template. Meanwhile, Co 3 O 4 with flake floral and dumbbell radial structure obtained by tuning the hydrothermal reaction time of precursors is used as a control group for gas sensing tests. The sensitivity of 3D radial Co 3 O 4 to sub-ppm acetone is 4 times higher than other structures and the detection limit is 100 ppb at a relatively low working temperature of 200 ℃, which is excellent among intrinsic acetone sensors based on pure Co 3 O 4 . The satisfactory gas sensing performance can be ascribed to the large specific surface, numerous transmission pathways, and low grain boundary resistance of the material. Furthermore, this work provides an idea for the further improvement of one-dimensional gas sensors.
研究领域:
材料科学
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传感器技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Advances
·
2021
·Vol. 2
·期 12
·3971-3980
·
IF 0
Shuai Wang,Zheng Lu,Yuan Fang,Tian Zheng,Zidong Zhang,Wenjian Wang,Rui Zhao,Weidong Xue
Rational construction of self-supporting electrodes has been extensively investigated in energy conversion and storage. In this work, hierarchical N-doped carbon-encapsulated Ni3S2 grown on a 3D porous Ni foam (H-Ni3S2@NC/NF) was controllably synthesized by a one-pot self-templated solvothermal method. Herein, we highlight the self-templated growth of multilayered Ni3S2 with N-doped carbon intercalation at a certain temperature. The unique H-Ni3S2@NC/NF shows enhanced active sites and a modulated electronic structure, which facilitates mass/electron transport. Thereby, the H-Ni3S2@NC outperforms a lower overpotential of 238 mV at 10 mA cm−2 and a low Tafel slope of 62 mV dec−1 than that of binary and ternary metal sulfides, suggesting an excellent mono-metal sulfide as a self-supporting electrode for oxygen evolution reaction.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Hui Peng,Shengliang Qi,Qian Miao,Rui Zhao,Yipu Xu,Guofu Ma,Ziqiang Lei
Holey carbon nanosheets provide unique in-plane pores and abundant interlayer channels, which facilitates the penetration and transmission of ions and significant application in the energy storage. However, rational design and fabrication of holey carbon nanosheets with optimized morphology and porosity remains a challenge. Herein, the nitrogen-doped holey carbon nanosheets (N-HCNs) have been prepared via one-step activation and self-generated template assisted carbonization route using “bottom-up” self-assembled polyimide (PI) nanoflowers as carbon precursor and ethylenediaminetetraacetic acid disodium zinc salt hydrate (EDTA-Na 2 Zn) as activating agent and self-generated template. The N-HCNs demonstrates an integral nanoflowers structure with intertwined and holey carbon nanosheets, which would benefit for the transport of ions and electrons, resulting in a satisfactory specific capacitance of 205 F g −1 at a current density of 0.5 A g −1 . More important, a symmetric aqueous supercapacitor assembled based on N-HCNs electrodes carries a wide operating voltage of 2.0 V, possesses high energy density of 17.92 Wh kg −1 at a power density of 500 W kg −1 , along with outstanding cycling stability. The present work proposes an affordable strategy to design novel porous carbon materials with controlled morphology for advanced energy storage and conversion.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Jiangshan Gao,Huanhuan Wang,Yang Zhou,Zhiming Liu,Yan He
The combination of magnetic nanoparticles and transition metal oxides has attracted much attention in microwave absorption applications. Herein, the MnO 2 /Mn 3 O 4 @Ni-Co/graphite carbon (GC) nanocubes with porous structure and ultrathin nanosheets was constructed by self-template strategy and in-situ synthesis. The composites not only synergize the magnetic loss of magnetic Ni-Co nanoparticles with the dielectric losses of GC and MnO 2 /Mn 3 O 4 , but also enhance the multiple interface polarization and improve impedance matching. As a result, the MnO 2 /Mn 3 O 4 @Ni-Co/GC nanocubes present outstanding electromagnetic wave (EMW) absorption performances, in which a RL min of −26 dB at 6.4 GHz with a thickness of 4 mm and an effective absorption bandwidth covering from 5.3 GHz to 6.4 GHz are achieved. Meanwhile, the widest effective absorption bandwidth with the value of 3.7 GHz can be achieved at a matching thickness of 2.0 mm. More importantly, this work provides a new strategy for the synthesis of EMW absorbing materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Qicheng Zhang,Yue Song,Bin Chen,Xuewen Hu,Wenchao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
Two-dimensional (2D) materials have unique planar structures and ultrathin thicknesses, but are prone to restacking and agglomerate due to the high surface energy. Building hierarchical structures is one of the effective ways to exploit their inherent properties and unique structural advantages. We unexpectedly found that the introduction of saturated NaCl solution to the hydrothermal synthesis of MoS 2 could significantly change its structure, resulting in the hierarchically structured nanosheet-assembled MoS 2 nanorods (R-MoS 2 ) with intercalated alkali ions. The formation process and synthesis mechanism of R-MoS 2 via NaNH 4 Mo 3 O 10 ·H 2 O reaction intermediate are systematically revealed by morphology and spectroscopy. Benefiting from this interesting hierarchical structure, the catalytic conversion of R-MoS 2 for p -chloronitrobenzene hydrogenation is significantly improved. Density functional theory calculation also demonstrates the intercalation of Na in MoS 2 can downshift the d -band center of Mo and favors the key final desorption process.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jing Li,Yang Yang,Ni Liang,Xi Wang,Xiong Tong,Bo Pan
In this study, we propose a simple and sustainable strategy to fabricate hierarchical porous graphitic carbon (HPGC) through the direct pyrolysis of banana peduncle, in which the naturally occurring potassium-rich components allow it to act as carbon source, template, and self-activator all in one. During pyrolysis, the formation of KCl and K 2 CO 3 enabled simultaneous carbonization and self-template/self-activation of banana peduncle, eliminating the need for exogenous chemicals. The resulting HPGC exhibited high graphitization, hydrophobicity, and a large specific surface area of 1686.30 m 2 g −1 , with a hierarchical pore structure dominated by micropores (peaking at 0.86 nm) and narrow mesopores (<4.0 nm). HPGC achieved exceptional sorption capacities of 730.63 and 833.44 mg g −1 for dimethyl phthalate and diethyl phthalate, respectively, within 2 h, significantly outperforming most reported sorbents. The superior performance is attributed to the developed pore structure and large surface area, which provided abundant sorption sites through pore-filling and surface coverage. Meanwhile, the hydrophobic π-conjugated carbon framework of HPGC facilitated the sorption via hydrophobic effects, π-π electron donor–acceptor interactions, and π-π stacking. Additionally, hydrogen bonding may be involved, but with minor contribution. Thermodynamic parameters indicated that the sorption process was spontaneous and exothermic, driven primarily by hydrophobic effects, resulting in an entropy gain in systems. The stronger sorption of diethyl phthalate compared with dimethyl phthalate was attributed to stronger hydrophobic interaction with HPGC. This work highlights a novel, cost-efficient, and environmental-friendly approach to synthesizing high-performance porous carbon for phthalate easters removal, offering significant potential for large-scale applications in water remediation.
研究领域:
环境科学
·
材料科学
✓ 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）