C-Journal of Carbon Research
·
2025
·Vol. 11
·期 2
·32
·
IF 2.9
Ran An,Jinyue Liu,Haomiao Ma,Yuqing Yan,Yuanru Guo,Qingjiang Pan,Shujun Li
To address the need for reducing carbon emissions and enhancing the sustainable utilization of non-fossil resources, a one-step calcination strategy has been developed to fabricate hierarchical carbon aerogels from balsa wood. The resulting wood-derived carbon aerogels (WCA) were functionalized with Mg(OH)2to boost their environmental remediation potential. Comprehensive characterization using XRD, FT-IR, XPS, and SEM confirmed that the optimized WCA/Mg(OH)2composite (WCAMg) retained a three-dimensional hierarchical porous structure, and Mg(OH)2nanosheets were attached to it. The adsorption performance of WCAMg composites towards Cd2+was systematically investigated through controlled experiments, which focused on three critical variables (Mg(OH)2loading content, initial Cd2+concentration and solution ionic strength). The functionalized WCAMg demonstrated a maximum Cd2+adsorption capacity of 351.1 mg g−1—a tenfold improvement over pristine WCA. Combined with exceptional adsorption efficiency, this biomass-derived composite offers an eco-friendly, cost-effective solution for heavy metal ion remediation. Its scalable fabrication from renewable resources aligns with sustainable water treatment objectives, presenting the advantage of pollution mitigation.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Jiehua Bao,Yuming Zhou,Yiwei Zhang,Yanyun Wang,Shuang Liang,Zhiwu Guo,Chang Guo,Yi Xue,Tao Zhuang,Yingjie Hu
In this study, we synthesized a series of Ni-based catalysts with different CeO 2 contents (0, 1, 2, 5 and 10 wt%) anchoring on the Al-Mg oxide spheres (AMO) with three-dimensional hollow flower-like structure. The triethoxyoctylsilane (TEOOS) and polyvinylpyrrolidone (PVP) were selected as effective modified reagents to introduce hydrophobic functionality on the surface of AMO and Ni-CeO 2 nanoparticles, respectively, for controllable anchoring Ni-CeO 2 nanoparticles on AMO by hydrophobic interaction driving mechanism. The effects of CeO 2 content on the texture, dispersion of Ni species, the reducibility of Ni 2+ , surface electronic states and acidity were investigated in detail. The Ni-5CeO 2 /AMO was found to achieve the highest 2,2′-bipyridine selectivity of 90.6% and maximum turnover number (TON) of 8611, specifically. Moreover, the Ni-5CeO 2 /AMO exhibits superior stability, maintaining 89% of 2,2′-bipyridine yield after 6 runs, due to the mitigated nickel leaching and promotion of the desorption of 2,2′-bipyridine. Furthermore, with the help of DFT calculations, a possible reaction mechanism was discussed and illustrated.
研究领域:
催化化学
·
材料科学
·
表面化学
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2022
·
IF 9.417
Yanqing Xue,Qitang Hao,Xinlei Li,Han Zhang,Peiqing Wang,Chengze Yin,Bo Li,Xinliang Wang
The strength-ductility trade-off severely limits the extensive application of particle-reinforced aluminum matrix composites mainly owing to the critical issues of local particle agglomeration and poor interfacial characteristics. The present work concentrates on these intractable puzzles and proposes Mg-Ag microalloying TiB 2 /Al-4.5Cu composites fabricated by an optimized salt-metal reaction method and multistage heat treatment. The resulting microstructure evidence that this new tactic synergistically ameliorates the detrimental agglomeration of TiB 2 particles by Mg and Ag doped at the TiB 2 /α-Al interface， meanwhile promoting the formation of nanosized Ω-Al 2 Cu and σ-Al 5 Cu 6 Mg 2 phases. The mechanical property experimental results indicate that the Mg-Ag microalloyed TiB 2 /Al-4.5Cu composites exhibit an accredited combination of the tensile strength (ultimate tensile strength is 496.3 ± 15.0 MPa) and ductility (uniform elongation is 12.8 ± 1.4 %). We emphasize the reciprocal effect between TiB 2 particles and the precipitated phase associated with unrelaxed misfit strains. Close attention is also paid to the interface binding characteristics and semi-coherent interphase boundary to evaluate their contribution to the ductility. The microalloying strategy can potentially be applied to many other metal matrix composites and boost analogous approaches for designing ultrahigh yet ductile materials for technological applications.
研究领域:
材料科学
·
金属学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER TESTING
·
2020
·
IF 3.275
Tongyi Wu,Xuejun Lai,Hongqiang Li,Yishen Chen,Yanlin Wang,Tian Liu,Xingrong Zeng
It is of great significance and challenge to efficiently improve the tracking and erosion resistance of silicone rubber along with the growing requirements in the field of outdoor high voltage insulation. In this work, we herein proposed an effective way to address this issue by incorporating vinyltriethoxysilane (ViTES) and layered Mg–Al double hydroxide (LDH) into high temperature vulcanized silicone rubber (HTVSR). ViTES/LDH notably enhanced the tracking and erosion resistance of HTVSR. With addition of 3.33 phr ViTES and 5.00 phr LDH, the anti-tracking performance of HTVSR reached the 1A 4.5 level, and the eroded mass was merely 0.3%. The results of scanning electron microscopy and equilibrium swelling showed that ViTES substantially improved the interfacial interaction between HTVSR and LDH and the crosslinking density of HTVSR, and enhanced the dispersion of LDH sheets in the HTVSR matrix. The possible synergistic suppression mechanism of ViTES/LDH on the tracking and erosion of HTVSR was further studied and demonstrated by the plasma irradiation analysis, thermogravimetry and thermogravimetry-Fourier transform infrared spectrometry. It was indicated that under the high voltage arcing discharge, LDH facilitated the formation of a dense barrier layer consisting of bimetal mixed oxides on the HTVSR surface, exerting outstanding lamellar barrier effect. The further degradation and the generation as well as development of electrical tracking were efficiently suppressed. Our findings provided a new approach to fabricate silicone rubber with excellent tracking and erosion resistance.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2021
·
IF 9.297
Weiye Wang,Qingliang Zhao,Jing Ding,Kun Wang,Junqiu Jiang
Bio-electro-Fenton powered by microbial fuel cell (MFC-powered BEF) can in-situ generate and utilize hydrogen peroxide to degrade refractory pollutants. Most of the previous works loaded transition metal on the cathode to participate in the Fenton reaction showed limited electrical or degradation performance. The coupling of alkaline-earth metal (Mg 0 and MgO) and transition metal on cathode could improve the electrochemical and catalytic properties of MFC-powered BEF system, which had not been reported so far. In this research, a novel cathode of Fe–Mn–Mg/carbon fiber (Fe–Mn–Mg/CF) was developed with good polymerization effect of Mg to Fe and Mn, and outstanding production of reactive oxide species (•OH and •O 2 − ), which further improved the overall electricity generation efficiency and enhanced the degradation of pollutants. Accordingly, the maximum power density generated in MFC-powered BEF system with Fe–Mn–Mg/CF cathode was 2.07 times higher than that of the frequently used Fe–Mn/CF. Owing to the superiority of surface holes and MgO in H + adsorption and electron transfer , the integration of Fe, Mn with Mg promoted the in-situ generation of H 2 O 2 and active radicals, resulting in the highest catalytic performance of degrading refractory pollutants . Initial pH, external resistance, initial concentration of contaminant and cycle use frequency of cathode were also evaluated on the degradation efficiency of the BEF system. Furthermore, reaction and degradation mechanisms were proposed from H 2 O 2 production and free radical characterization. Overall, this study provided a novel cathode preparation approach for the MFC-powered BEF system, which vastly promoted its electrochemical and catalytic properties.
研究领域:
环境科学
·
电化学
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2022
·
IF 5.907
Tianqi Yuan,Miao Chen,Xiaotong Sun,Jianping Guan,Fawei Zhu,Kai Tang,Zhipeng Zhang,Qi Liu,Xiaoqing Chen
Designing chiral adsorption separation material with high enantioselectivity and stability is a promising route to realize the enantioselective recognition and separation of racemic molecules. Here, for the first time, camphor sulfonic acid derivatives (CSA) were synthesized as a chiral resolving agent, and it was modified on Mg/Al layered double hydroxide (Mg/Al-LDH) through electrostatic self-assembly to construct functionalized chiral adsorption separation material (CSA@LDH), which could be served as an adsorbent for enantioselective recognition and separation of propranolol enantiomers ( R,S -PRO). The CSA@LDH maintained the advantage of limited chiral space in layered structures to achieve the selective enrichment of R -PRO, and the e.e. % value of single separation could reach 19.5%. Meanwhile, density functional theory (DFT) calculations supported that chiral recognition and separation were ascribed to the discrepancy in affinities stemming from the difference of π-π interaction force and hydrogen bonding capacity of CSA with R,S -PRO. Hence, considering the superior ability of hydrogen bond coordination and stereocontrol of camphor sulfonic acid derivatives, it is expected to be more widely used as a chiral resolving agent for other enantiomeric recognition and separation.
研究领域:
化学
·
材料科学
·
药物化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Yawei Wang,Shu Jin,Xiaoqin Sun,Shunhang Wei,Long Chen,Xiaoxiang Xu
In spite of a strong visible light absorbance as far as 600 nm, CaNbO 2 N generally exhibits poor photocatalytic activity under normal conditions because of various structural defects and poor charge mobility. In this work, we have synthesized a series of Mg-modified CaNbO 2 N, i.e. CaNb 1-x Mg x O 2+y N 1-y (0 ≤ x ≤ 0.2), and performed a detailed investigation on their crystal structures, optical absorption and other physicochemical properties. Our results show that there is a slight shrinkage of the unit cell and a blue-shift of absorption edges upon Mg incorporation into CaNbO 2 N. The nitrogen contents as well as defects levels can be effectively tuned by altering the content of Mg. More strikingly, photocatalytic oxygen productions are much improved after Mg modifications under visible light irradiation (λ ≥ 420 nm). An average oxygen production rate as much as ∼126.8 umol h −1 and an apparent quantum efficiency as high as ∼3.4 % at 420 ± 20 nm is achieved for CaNb 0.9 Mg 0.1 O 2+y N 1-y (x = 0.1). These improvements probably stem from a substantial decrease of Nb 4+ defects in CaNbO 2 N as well as slight positive shift of valence band maximum (VBM) after Mg modifications. Meanwhile, photoelectrochemical analysis suggests charge migration is somewhat enhanced in response to Mg modifications.
研究领域:
材料科学
·
光催化
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 27
·13216-13231
·
IF 3.553
Huang Liqu,Wang Xianli,Zhang Yue,Cheng Zhaojun,Xue Feng,Guo Yunfei,Deng Yongji,Chu Chenglin,Tao Li,Bai Jing
Hypospadias is a common congenital malformation of the male urogenital system. As a recently arisen reconstruction method for hypospadias, polymer tissue engineering urethral scaffold often results in necrosis and other complications due to the lack of bioactivity. To improve the bioactivity of polymer, in this work, we prepared biodegradable Mg/poly(lactic-co-glycolic acid) (PLGA) composite nanofiber scaffolds by electrospun with 3, 6, and 9 wt.% of micron-scale Mg particles. The mechanical properties of the PLGA scaffold gradually decrease with the addition of Mg particles but still at an acceptable level. On the other hand, these composite scaffolds show very good biocompatibility and promotional bioactivity, namely non-cytotoxicity, gradual proliferation enhancement, and good adhesion state of human adipose stem cells (HADSCs) on the scaffold surface. Besides, through quantitative real-time polymerase chain reaction (qRT-PCR) test, different genes expression levels of human umbilical vein endothelial cells (HUVECs) were also gradually up-regulated with the increase in Mg content. The present results indicate that Mg containing PLGA scaffolds might not only have the potential to promote tissue regeneration related to urethral repair, but also stimulate endothelial cells to achieve vascularization and anti-inflammatory functions. Consequently, considering both the mechanical properties and bioactivity for clinical demand, the Mg/PLGA composite scaffolds with suitable Mg contents are promising for the regeneration of defective urethral tissues.
研究领域:
组织工程
·
生物材料科学
·
再生医学
·
泌尿外科
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2020
·
IF 4.605
Yaowu Cao,Qinghai Guo,Mengsi Liang,Weihao Sun
Antimony enrichment in aquatic environments is of great concern to international community. High-temperature geothermal waters usually contain excessive Sb, which are apt to contaminate the groundwaters or surface waters used as drinking waters in and around a hydrothermal area. However, Sb removal from geothermal water is rarely documented and the effect of high temperature on Sb removal has not received much attention. In this study, batch sorption experiments were conducted to investigate Sb removal from water by a hydroxyl-intercalated, mechanochemically synthesized Mg-Fe-LDH (i.e. Mg-Fe-OH-LDH) capable of avoiding secondary pollutions commonly related to other Mg-Fe-LDH intercalated by undesirable anions, such as Cl − and NO 3 − . The sorption capacities of Mg-Fe-OH-LDH for Sb(III) and Sb(V) were up to 48.7 and 30.0 mg/g, respectively. Notably, Mg-Fe-OH-LDH performed even better in removing aqueous Sb(V) at higher temperatures, superior to sorption of Sb by iron oxides that is generally exothermic and tends to be inhibited by increasing reaction temperature. The removal of Sb(V) existing as Sb(OH) 6 − by Mg-Fe-OH-LDH was attributable to its exchange with interlayer hydroxyl, and therefore could be impaired to some degree by coexisting anions with stronger electronegativity or smaller ionic radii . In contrast, anion exchange didn't contribute so much to Sb(III) sorption, because the main Sb(III) species at pH < 10 is neutral Sb(OH) 3 . XPS analyses confirmed that inner-sphere complexation between sorbed Sb(III) and Fe on Mg-Fe-OH-LDH layers was formed, which was hardly affected by competitive anions. Mg-Fe-OH-LDH is promising to be practically applied in removing both Sb(III) and Sb(V) from contaminated natural waters, wastewaters, or geothermal waters potentially acting as a pollution source .
研究领域:
环境科学
·
水处理
·
地球化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Qian Chen,Wenyan Guo,Dan Fang,Ting Li,Lin Chen,Chun Mao,Mimi Wan,Jian Shen
The efficient capture and detection of circulating tumor cells (CTCs) in blood is very important for the early detection of cancer. In this work, efficient detection of CTCs through electrochemical means utilizing Mg-Based micromotors was realized, the prepared Fe 3 O 4 /P/anti-E nanoparticle was subjected to modification using an aldehyde-amine condensation reaction to attach it to the Mg ball. Utilizing the asymmetrical structure of micromotor, we find that the movement range of the magnesium microsphere has obviously improved. On this basis, efficient capture of CTCs can be realized upon the modification of Fe 3 O 4 /P/anti-E with capturing cyclability ability. Such a behavior can be attributed to the anti-E modified on the micromotor can target the epithelial cell adhesion factors on CTCs. Furthermore, A funnel-shaped electrochemical detection device was developed to realize the electrochemical detection of captured CTCs based on the insularity of CTCs. The strategy can potentially provide new visions for the early detection and timely treatment of cancer.
研究领域:
癌症研究
·
生物医学工程
·
纳米技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF TIANJIN UNIVERSITY
·
2018
·Vol. 25
·期 2
·169-184
·
IF 0
Li Yingxia,Li Jiaxin,Yang Xiao,Wang Xitao,Xu Yanhong,Zhang Lihong
A series of PtCuCeMgAl quintuple hydrotalcite-like compounds with different Ce contents were synthesized by one-pot method. After calcining and reduction, CeO 2 -modified Mg(Al)O-supported Pt–Cu alloy catalysts were obtained. To understand the effect of Cu and Ce, the structure and physico-chemistry properties of the catalysts were characterized and analyzed, and the catalytic behaviors were investigated in a direct dehydrogenation of propane to propene. The results show that the Pt 4+ , Cu 2+ , and Ce 3+ ions can be incorporated into the brucite-like layers and the Ce content significantly affects the interaction strength between Pt and Cu and the dehydrogenation performance of propane. Under the reaction conditions, the highest propane conversion (45%) with 89% selectivity to propene and a 40% propene yield were achieved with a 0.3 wt% Ce-modified PtCu/Mg(Al)O catalyst. The improved catalytic performance is related to the easy formation of Pt–Cu alloy phase, excellent resistance to sintering, and coke deposits of active components modified by CeO 2 .
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Lei Chen,Wenxia Zhuang,Jingmin Lan,Xiaoling Liu,Shi Jiang,Lei Wang,Yu Zhou,Jun Wang
Mg-bearing MTW silicalite zeolite, MgSi-ZSM-12, was straightforwardly synthesized by involving an unusual acidic pre-gelation system and engaged as the task-specific support for loading the Au nanoparticles (NPs). The resulting Au/MgSi-ZSM-12 catalyst showed stably excellent activity for the oxidation of HMF into FDCA in the presence of atmospheric dioxygen (O 2 ) without externally adding any liquid base, affording a yield of 87 % and turnover number (TON) of 331 based on the surface Au sites. Superior basicity was evidenced by embedding Mg species into the all-silica zeolitic skeleton, which enables strong, weak, and near-zero affinity towards aldehyde, alcohol, and carboxyl groups, respectively, thus, allows rapid and high-uptake adsorption of HMF, but negligible adsorption of FDCA. This unique feature of the Mg-bearing all-silica zeolite support together with its synergy with the active sites of Au NPs is revealed to accelerate the production of FDCA under the base-free mild condition.
研究领域:
催化化学
·
材料科学
·
环境化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）