INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Yuan Zhao,Qingshuang Wang,Dongming Yin,Shouliang Li,Chunli Wang,Long Liang,Shaolei Zhao,Chunmin Zhang,Limin Wang,Yong Cheng
The high dehydrogenation temperature of α-AlH 3 has always been an important factor hindering its development. In order to solve this problem, we synthesize Bi-MOF by hydrothermal method and burn it under inert gas to obtain Bi@C, which is used as catalyst ( x Bi@C, x = 3, 5 and 7 wt%) to improve the hydrogen desorption performance of α-AlH 3 . The dehydrogenation onset temperature of α-AlH 3 +5 wt% Bi@C drop to 80.4 °C, which is reduced by 43.4% compared with pure α-AlH 3 . At 120 °C, it can provide a stable hydrogen capacity of 7.45 wt%. In contrast, pure α-AlH 3 releases only 6.66 wt% hydrogen at the same time. The density functional theory calculations further indicate that the existence of Bi@C catalyst can make the Al–H bond length increase, more conducive to the release of hydrogen. The results show that the synergistic effect of Bi and porous carbon in Bi@C materials can improve the hydrogen desorption kinetics of α-AlH 3 , providing a good prospect for the application of α-AlH 3 in hydrogen storage .
研究领域:
材料科学
·
氢能存储
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Weiwei Zhu,Dekui Shen,Haijiao Xie
The primary objective of this investigation is to assess the electrochemical properties of porous carbon, concurrently doped with nitrogen and oxygen, featuring a diverse array of surface heteroatoms. We synthesized this type of porous carbon material from Houttuynia cordata, subjected to procedures of nitrogen infusion and activation. Our findings indicate a strong relationship between the pseudocapacitance of the dually doped porous carbon and the concentration of pyridinic-nitrogen. As the pyridinic-nitrogen content increases, the pseudocapacitance first increases due to the growing tendency of active sites. After the pyridinic-nitrogen/carbon atomic ratio reaches 0.027, the pseudocapacitance decreases because the conductivity of the carbon material decreases. Density functional theory simulations indicate that the band gap of pyridinic-nitrogen-doped graphene is 0.021 eV, which is larger than that of nitrogen-free graphene. The increased band gap makes electronic transitions less likely, and the conductivity decreases.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 9
·2369
·
IF 5.076
Bao Wang,Lihua Kang,Mingyuan Zhu
A hierarchical porous carbon material (HPC) with an ultra-high specific surface area was synthesized with sisal fiber (SF) as a precursor, and then H3PW12O40·24H2O (HPW) was immobilized on the support of SF-HPC by a simple impregnation method. A series characterization technology approved that the obtained SF-HPC had a high surface area of 3152.46 m2g−1with micropores and macropores. HPW was well-dispersed on the surface of the SF-HPC support, which reduced the loading of HPW to as low as 5%. HPW/SF-HPW showed excellent catalytic performance for oxidative desulfurization, and the desulfurization rate reached almost 100% under the optimal reaction conditions. The desulfurization rate of HPW/SF-HPW could be maintained at above 94% after four recycles.Keywords:oxidative desulfurization;hierarchical porous carbon;HPW loading;dispersion
研究领域:
材料科学
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催化化学
✓ 已验证
DOI
PubMed
高影响因子
Processes
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2022
·Vol. 10
·期 7
·1359
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IF 3.352
Xiaoyu Huo,Chao Jia,Shanshan Shi,Tao Teng,Shaojie Zhou,Mingda Hua,Xiangdong Zhu,Shicheng Zhang,Qunjie Xu
Potassium thiocyanate (KSCN), a highly efficient “three birds with one stone” activator, might work with inorganic activators to produce excellent N/S co-doped porous carbon (NSC) materials for environmental remediation. However, the effects of inorganic activators on cooperative activation are unclear. As a result, the influence of inorganic activators on the synthesis of NSC materials was investigated further. This study shows that the surface areas of the NSC materials acquired through cooperative activation by potassium salts (KOH or K2CO3) were considerably higher than those acquired through KSCN activation alone (1403 m2/g). Furthermore, KSCN could cooperate with K2CO3to prepare samples with excellent specific surface area (2900 m2/g) or N/S content. The as-prepared NSC materials demonstrated higher adsorption capability for chloramphenicol (833 mg/g) and Pb2+(303 mg/g) (pore fitting, complexation). The research provides critical insights into the one-step synthesis of NSC materials with a vast application potential.Keywords:N/S co-doping;porous carbon;chloramphenicol adsorption;Pb2+removal
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Gaigai Duan,Shiyi Zeng,Haotian Jin,Shuijian He,Haoqi Yang,Xiaoshuai Han,Chunmei Zhang,Yong Huang,Shaohua Jiang
Carbon-based supercapacitors are highly regarded for their high specific power and long cycle life. However, they often face the challenge of low specific energy and difficulty in simultaneously improving both specific energy and specific power. In this study, a high-performance composite electrode was prepared using the cross-section of bamboo as raw material, followed by KOH activation, in-situ growth of ZIF-67, and carbonization. The bamboo-derived porous carbon showed significant improvement in performance indicators such as specific capacitance and energy density. Electrochemical characterization in a three-electrode system showed that at a current density of 1 mA cm −2 , our composite electrode material achieved a peak specific capacitance of 24.7 F cm −2 . When assembled into a symmetric supercapacitor, it can provide an energy density of 1.00 mWh cm −2 at a power density of 2.49 mW cm −2 . Notably, at a substantial current density of 30 mA cm −2 , the electrode maintained a capacitance retention of 96.2 % after 10,000 cycles. These results not only highlight the potential of bamboo-derived porous carbon but also point to a broad avenue for the preparation of energy storage devices by combining MOFs with bamboo.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
·
IF 4.7
Jingkun Zhao,Meijie Gao,Zixin Wu,Siyu Gao,Zhongyan Hu,Shangru Zhai,Qingda An,Zuoyi Xiao,Gongbing Zhou
The extensive therapeutic use of tetracycline (TC) in human and veterinary healthcare systems has resulted in notable environmental persistence, with detectable residues increasingly documented in aquatic ecosystems worldwide. While photocatalytic technology has been widely applied for TC degradation, improving the photocatalytic activity of catalysts remains a critical challenge. Improving charge separation efficiency is a key approach to enhance the activity of photocatalysts. In this work, we successfully coupled g-C 3 N 4 and CaMoO 4 on 3D porous carbon via a hydrothermal method. The photocatalytic properties of the composites were determined through the degradation of TC under visible light. Under simulated visible light irradiation, the results demonstrated that the g-C 3 N 4 /CaMoO 4 @C achieved 94.8% degradation of TC under 90 min of light exposure, significantly outperforming pure g-C 3 N 4 and pure CaMoO 4 , which achieved only 39.7% and 39.2% degradation in the same period. And the g-C 3 N 4 /CaMoO 4 @C achieved 73.59% removal of total organic carbon. The photocatalytic activity was investigated by adjusting key parameters, including TC solution pH, initial concentration, and catalyst dosage. The morphology, structure and composition of the catalysts were characterized by XRD, XPS and TEM characterization techniques, and the reasons for the improved performance of the composite photocatalysts were analyzed by combining the results of UV-Vis and PL characterizations, and the photocatalytic mechanism of the catalysts was further explored by ESR characterization.
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
Nano Energy
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2016
·
IF 11.553
Dan Liu,Gang Cheng,Heng Zhao,Chao Zeng,Deyu Qu,Liang Xiao,Haolin Tang,Zhao Deng,Yu Li,Bao-Lian Su
Polyhedral oligosilsesquioxanes (POSS), regarded as the smallest possible particles of silica , are used as carbon source and assembled into hierarchically porous carbon structures by a block copolymer-assisted method. The obtained carbon materials with high specific surface area of over 2000 m 2 g −1 and large pore volume of over 1.19 cm 3 g −1 possess both quite uniform micropores with the size of ~1 nm and highly ordered mesopores with the size of ~4 nm, owing to the molecular-scale templating effect of POSS siloxane cages as well as the good assembly compatibility between the block copolymers and the aminophenyl-functionalized POSS used. The mesopore arrangement can be two-dimensionally hexagonal ( p 6 m ) or body-centered cubic ( Im 3 ¯ m ) by simply adjusting different block copolymers. Nitrogen functionalities with a relatively high content (~4 wt%) can spontaneously be incorporated into those carbon materials. Benifiting from the uniform microporosity and the nitrogen doping, the specific capacitance of the POSS-derived hierarchically porous carbons can reach ~160 F g −1 in ionic liquid electrolyte and ~210 F g −1 in 1 M H 2 SO 4 aqueous electrolyte, when measured at a current density of 0.25 A g −1 in a symmetrical two-electrode cell. More importantly, the highly ordered mesopores can facilitate ions fast transportion to the fine micropores to achieve the excellent power performance. The hierarchial carbon sample with a hexagonal mesostructure and a high mesoporosity displays the best rate capability with 94% and 97% of capacitance retention in ionic liquid and 1 M H 2 SO 4 , respectively, with the current density range from 0.25 to 10 A g −1 . By combining self-assembly strategy with rich POSS chemistry, we believe that many other hierarchical hybrid materials or carbon materials with unique electrochemical properties can be synthesized.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Yanan Ma,Dingyu Zhang,Haimeng Wang,Yuxuan Liang,Yuan Zhang,Fengfeng Yan,Liang Sun,Qian Wang,Wei Li
Synthesis of multiple-site single-atom catalyst (SAC) with metal-containing nanoparticles by using zeolite imidazole framework (ZIF) for improving the bifunctional electrocatalytic performance is of great significance, yet it is also a challenge. Trimetallic ZIF-derived porous carbon nanosheets with the CoFe alloy nanoparticles enclosed in nitrogen-doped carbon nanotubes (N-CNTs) are fabricated by utilizing three transition metals as ZIF precursors and sodium chloride as templates via a typical two-step process, including synthesis and pyrolysis. By building CoFe alloy and tailoring d-band center ( E d ) of the Co site, the as-obtained FeCoZn@S-CN ZIF exhibits predominant kinetic activity and durability towards ORR and OER with an extremely low potential gap (Δ E ) value of 0.584 V, exceeding many other efficient counterparts. This study provides an effective approach for designing and synthesizing atomically dispersed multi-metal site catalysts with alloyed nanoparticles to achieve high-efficient bifunctional electrocatalytic performance in the application of the recharged zinc-air battery (ZAB).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
·
IF 12.2
Gao Feiyue,Zhou Chuncai,Cao Yachuan,Yu Yue,Li Yunfei,Liu Guijian
As a highly toxic rare metal, the removal of thallium (Tl) from wastewater has been widely investigated, and adsorption is considered one of the most promising treatment technologies for Tl-containing contaminated water because of its cost-effectiveness, convenience, and high efficacy. In this work, coal tar residue (CTR)-based porous carbon was synthesized through K 2 FeO 4 activation, and applied in adsorbing Tl(I). K 2 FeO 4 could synergistically produce porosity and load iron oxide on the produced porous carbon surface because of the catalytic cracking and oxidative etching during the activation of CTR. The adsorbent was synthesized at 800 ℃ with a mass ratio of K 2 FeO 4 /CTR being 3 (PC 3–800 ) showed optimal Tl(I) adsorption performance. The removal efficiency and distribution coefficient of PC 3–800 were above 95 % and 10 4 mL/g, respectively, in a wide pH range (4−10). Furthermore, the selection and reusability of PC 3–800 were favorable. The adsorption was a spontaneous, exothermic, and entropy increase process. The adsorption process was dominated by electrostatic attraction, surface complexation, and surface oxidation . The results suggested that removing Tl(I) from contaminated water via CTR-based porous carbon was feasible.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 19
·4633
·
IF 4.2
Yan-Fang Li,Li-Fang Wang,Shu-Juan Gao,Tan-Lai Yu,Qi-Feng Li,Jun-Wei Wang
A Co-doped porous carbon was successfully fabricated by a facile carbonizing procedure using coal hydrogasification semi-coke (SC) as the carbon and cobalt nitrate as the magnetic precursors, respectively. The mass ratio of the precursors was changed to regulate the microwave absorption (MA) capabilities. The favorable MA capabilities are a result of a synergistic interaction be-tween the dielectric loss from the carbon framework, the magnetic loss from nano-sized Co particles, and multiple scattering from the residual pores. At a thickness of 4.0 mm, the Co/C composite showed the lowest reflection loss of −33.45 dB when the initial mass ratio of cobalt nitrate and SC was 1:1. The effective absorbing bandwidth (EAB) could achieve 3.5 GHz at 2 mm thickness. This work not only opens up a new avenue for the facile fabrication of dielectric and magnetic loss combinations and their structural design, but it also creates a new route for the high value-added exploitation of SC.
研究领域:
材料科学
·
能源与环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Cuiwen Jiang,Yanli Wang,Jing Liang,Liping Xie,Zhongdan Liang,Kejing Huang,Huiling Li,Tao Li,Dejiao Ning,Li Tang,Xiaochuan Huang,Lihong Luo,Yu Ya,Feiyan Yan
Patulin (PAT) in food is a menace to human health. Hence, a sensitive and precise approach to PAT detection is significant. In this research, an innovative electrochemical assay was developed for sensitively determining PAT by assembling aptamers on a carboxylation hierarchically porous carbon (HPC-COOH) modified glassy carbon electrode. Diverse analytical methods were used to describe electrode morphology, structure, chemical composition, and electrochemistry properties. The HPC-COOH, with a large surface area, played a crucial role as a unique substrate to effectively immobilize aptamers and enhance target PATs' recognition and capture ability. Simultaneously, the excellent electrical conductivity of HPC-COOH was significant for the signal amplification of sensors. Under optimized conditions, the aptasensor enabled efficient PAT detection in a broad concentration range (0.5–5.0×10 6 ng/L) with a low detection limit (0.25 ng/L). The designed aptasensor showed high sensitivity, selectivity, reproducibility, and stability under optimized conditions. The sensors’ feasibility for practical applications was further demonstrated by analyzing apple juice and haw juice samples.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Shujuan Jia,Qian Guo,Ming Shen,Qiang Gao,Kai Wang
A hydrothermal method was employed to synthesize nitrogen-doped porous carbon spheres (NPCSs), with tetraethoxysilane as the silica source, a phenolic resin , formed by the reacting 3-aminophenol with amphiphilic aliphatic aldehydes , as a carbon source and the self-assembly of imidazole cationic surfactant (1-dodecyl-3-methylimidazolium bromide) as a soft template. The effect of the carbon chain length of the fatty aldehyde on the morphology, pore parameters and electrochemical properties of the synthesized carbon nanomaterials was systematically investigated. Notably, the pyrene probe test shows that aliphatic aldehydes with different hydrophobic chain lengths are solubilized to the fence layer of the surfactant , which may increase the distance between the hydrophilic head groups of the surfactant and lead to collapsing of carbon sphere surfaces. Nonetheless, the synthesized N-doped porous carbon spheres exhibit interconnected pore structures , high surface area (1032–1040 m 2 g −1 ), large pore volume (0.82–1.30 cm 3 g −1 ), large pore size (3.73–6.32 nm) and abundant N content (5.86–6.94 at%). Moreover, Electrochemical tests in 6 M KOH demonstrated impressive electrochemical performance , with specific capacitance as high as 181 F g −1 at 1 A g −1 and an excellent rate capacity of 96% retention after 5000 cycles at 10 A g −1 .
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）