Materials Today Communications
·
2024
·
IF 3.7
Yufei An,Yiping Su,Gang Li,Shuoyang Liang,Yingying Cai,Ruiheng Zhang,Xuehua Shen,Feng Yan,Zuotai Zhang
CO 2 capture through mineral carbonation extends the applicability of carbon sequestration by enabling storage in various cementitious materials derived from solid wastes. Calcium-containing cementitious materials receive extensive attention due to their potential for carbon capture, however, the underlying mechanisms both decalcification and carbonation during composition-structure evolution remain to be fully elucidated. Herein, a mineral carbonation strategy was reported to enhance carbon uptake performance, depending on the evolution stage of calcium (alumino) silicate hydrates (C-(A-)S-H) gel induced by alkali activation. Sequential dynamic monitoring and experimental characterizations confirmed that the decalcification and carbonation processes are closely linked to Ca-bonding states within the C-(A-)S-H structure. The results indicate that the short chains of alumino-silicate and the majority of the weakly bonded Ca phases are more prone to carbonation. Estimation of carbonation capacities also revealed that samples with 3h-activation exhibit the highest carbonation capacities (80.5 %), showing the higher carbonate potential with free Ca and weakly bound Ca (e.g. Ca(OH) 2 and interlay Ca in tobermorite-like structure) than samples with more intralayer Ca. Our work can provide new insights into the understanding of alkali activation induced decalcification and the improvement on carbonation capacities in early-formed C-(A-)S-H analogues.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Shuen Chen,Gengchang Lai,Xiaoyi Zhang,Xiaoxiao Feng,Liping Tong,Chenglong Peng,Xingchen He,Yang Li,Jiahong Wang
Phosphorus is an ideal anode material for high-rate lithium-ion batteries due to its high theoretical specific capacity and moderate operating potential. However, phosphorus undergoes tremendous volume expansion and low electrical conductivity during lithium storage, affecting its actual lithium storage performance. The formation of P–C bonds is an effective strategy to inhibit the volume expansion and maintain stable electrical contact between phosphorus and the current collector. Herein, high strength metal nanoparticles, such as molybdenum nanoparticles, are introduced into the ball milling process to reinforce P–C bonding and enhance the lithium storage performance. As a result, the BP/Mo/CNTs anode provides a high-rate capacity of 984 mAh g–1 at 8.0 A g–1 and high capacity retention of 90.3% after 300 cycles at 0.5 A g–1. To demonstrate the universality of this method, BP/W/CNTs nanocomposites were prepared by tungsten-assisted ball milling. This facile strategy provides a practical approach for the formation of abundant covalent bonds to improve the electrochemical performance of composites.
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JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Peng-Fei Guo,Le-Yan Li,Hang Xu,Bin Zhao
The self-coupling reaction of primary amines is an efficient method for obtaining imines, which are important components in the organic synthesis of medicines, pesticides, and fine chemical products. However, this reaction often requires the utilization of noble metals as catalysts to achieve high yields. Therefore, it is both desirable and challenging to explore efficient noble-metal-free catalysts. In this study, a composite catalyst of CuInS 2 / C with a regular octahedral shape and porous framework was synthesized using the HKUST-1 as precursor. The CuInS 2 / C catalyst exhibited effective catalytic activity in the self-coupling synthesis of imines under mild conditions, achieving a turnover frequency (TOF) of 105 h −1 , which surpasses other non-noble metal catalysts. Mechanism investigations revealed that the excellent catalytic performance of CuInS 2 / C was attributed to its Cu(I) center and porous structure. The former generates radicals, while the latter enhances the transport of substrates and products, facilitating imine synthesis. Importantly, the CuInS 2 / C catalyst could be reused at least four times and applied in gram-scale experiments, demonstrating promising practical applications. This research presents a direct approach to developing noble-metal-free and highly efficient composite catalysts for imine synthesis using MOFs as precursors.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shuqiang Wang,Yanpeng Xue,Feifei Huang,Zhigang Yu,Ying Jin
Fine-tuning the surface structure of transition metal oxides at the atomic level is a promising way to improve the catalytic properties of materials . However, the influence of crystal surface structure on electrode reaction kinetics is still limited. In this study, we propose an in-situ synthesis strategy to obtain two-dimensional carbon/cerium oxide core–shell nanosheets by thermal decomposition of Ce-MOF nanosheets grown on the surface of carbon nanostructures , and fine-tuning the surface structure by introducing oxygen vacancies through defect engineering during the oxide nucleation process is conducted to obtain controllable exposed {1 1 1} and {1 1 0} surface CeO 2 @C composites. Both experiments and theoretical calculations show that the {1 1 0} -dominated nanocomplex (CeO 2 @C-350S) has better kinetic behavior and catalytic activity due to its abundant surface defects , which is manifested in higher active surface area , richer carrier concentration, and better promotion of diffusion and adsorption. In addition, CeO 2 @C-350S electrode has an extremely wide linear range and good stability in the electrochemical detection of nitrite. After 1000 times of the accelerated cycle experiments, CeO 2 @C-350S electrode still maintains 79.3 % of its initial current response, and recovers to 87.3 % after 10 min of stopping the test. The electrode stability is excellent, which is attributed to the clever carbon shell structure of the material. This synthesis strategy can be extended to other carbon-based oxide composite catalysts to improve the electrocatalytic performance and overall stability by adjusting the surface structure.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yu Zhang,Rong Li,Qi Guo,Fangxiang Song,Kang Kai,Qianlin Chen
The emergence of the lithium-ion battery as a subject of intense research interest has propelled of high-energy–density LiFe x Mn 1-x PO 4 (LFMP) becoming a prominent area of investigation. However, the material suffers from inherently low electronic conductivity due to its olivine structure, which imposes severe constraints on electron transport kinetics, thus adversely impacting both charge–discharge rates and overall electrochemical performance. We propose an innovative protocol for high-precision reaction mechanism modulation. By employing Fe 3 (PO 4 ) 2 ·8H 2 O with strategically enhanced (020) crystal plane exposure as a pivotal precursor, we synthesized LiFe 0.75 Mn 0.25 PO 4 /C cathode material featuring a shorter ion diffusion path. Comprehensive characterization coupled with electrochemical validation revealed that the resultant cathode material exhibits a smaller particle size and more uniform morphology, along with a superior rate performance and cycle stability. The discharge specific capacity is 144.1 mAh g −1 and the capacity retention reaches 96.1 % over 1000 cycles at a 1C rate. The findings demonstrate that the regulation of the growth trajectory of the precursor Fe 3 (PO 4 ) 2 ·8H 2 O crystal plane can markedly enhance the electronic conductivity and Li + mobility of the cathode material, thereby optimising the electrochemical performance.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 2
·020547
·
IF 3.1
Weida Li,Haoyan Gu,Hao Yang,Quanchen Li,Xinran Li,Yaping Wang,Guangchuan Liang
High volumetric energy density LiFePO4/C cathode materials were synthesized by wet ball milling, spray drying, and carbothermal reduction method using glucose and polyethylene glycol (PEG) as composite carbon sources and dodecyl polyglucoside (C12APG) as a milling aid. With the introduction of C12APG during the ball milling process, the prepared cathode materials have uniform particle size (100–200 nm in diameter) and regular primary particle morphology. In addition, PEG substitutes part of glucose as a carbon source, resulting in low carbon content and high graphitization of residual carbon after high-temperature calcination. The prepared LiFePO4/C cathode materials have a high powder compaction density (2.68 g cm−3) and excellent electrochemical performance (discharged capacities of 161.2 and 141.7 mAh g−1 at 0.2 C and 5 C, and cycle retention of 98.6% for 100 cycles at 1 C/1 C). This LiFePO4/C composite was assembled into 14500-type cylindrical batteries with a compaction density of 2.62 g cm−3 for the positive electrode. The volumetric energy densities of the positive electrode were 1135.18 Wh L−1 and 918.16 Wh L−1 at 0.2 C and 5 C, respectively.
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ACS Omega
·
2024
·
IF 3.7
Hong Duan,Han Li,Tianyi Liu,Yuan Chen,Mengmeng Luo,Ying Shi,Jing Zhou,Marwan M. A. Rashed,Kefeng Zhai,Lili Li,Zhaojun Wei
Atherosclerosis (AS) is a common cardiovascular disease that poses a major threat to health. Schisandra chinensis is a medicinal and edible plant that is commonly used to treat cardiovascular diseases. In this paper, HPLC was used to detect and analyze 5 different components in Schisandra chinensis. Network pharmacological predictions highlight the PI3K/AKT/mTOR pathway as an important pharmacological pathway. The effective ingredient Schisandrin C was screened by the molecular docking technique. ox-LDL-induced HUVECs were used to construct the atherosclerosis model for further experimental verification. The results showed that Schisandrin C interfered with the PI3K/AKT/mTOR autophagy pathway. This study lays a foundation for the further application of Schisandrin C in the prevention and treatment of atherosclerosis in the future.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yashi Qing,Enming Huang,Lixia Cao,Haigang Gao,Shengyong Zhao,Yanxiang Li,Wangliang Li
The prevalence of 17β-estradiol (E2) in wastewater has attracted widespread attention due to the negative impacts on ecological environments and human health. Nowadays, photocatalysis has been emerged as an efficient technology for E2 containing wastewater treatment. However, traditional powder photocatalysts face challenges such as easy agglomeration, secondary pollution and difficult recovery, limiting their large-scale application. In this study, a photocatalytic PA/C-PANI@BiOBr membrane was fabricated by immobilizing polyaniline (PANI) layer and BiOBr nanosheets on polyamide (PA) membrane through in-situ chemical bath deposition. This process leveraged the strong hydrogen bond interaction between PANI and PA, with the fine PANI fibers providing nucleation sites for the in-situ growth of BiOBr nanosheets. By repeating the immersion process, we controlled variations in the coverage density and morphology of BiOBr on the membrane surface. The PA/C-PANI@BiOBr membrane exhibited outstanding light absorption and photocatalytic performance. Notably, the optimal PA/C-PANI@BiOBr-10 membrane achieved 100 % removal efficiency of 3 mg L −1 E2 within 40 min. In dynamic cyclic experiments, PA/C-PANI@BiOBr-10 membrane maintained stable permeability and high removal efficiency of pollutants. The photocatalytic mechanism underlying these results was elucidated through photoelectric testing and further photocatalytic experiments. Furthermore, the PA/C-PANI/BiOBr-10 membrane demonstrated remarkable durability over multiple consecutive cycles, with E2 removal efficiency remaining above 96.5 % after 5 cycles.
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MOLECULES
·
2024
·Vol. 29
·期 9
·2078
·
IF 4.2
Yu Cao,Zeming Dai,Xuan Zhou,Yuting Lin,Jianhua Hou
The dyes in printing and dyeing wastewater are harmful to the human body and the environment. It is essential to develop practical and effective adsorbents to deal with them. In this study, an Fe-doped, ZIF-67 derived Fe/Co/C composite material with strong magnetism was successfully synthesized. The effects of pH, initial concentration, and adsorption time on the properties of the adsorbent were investigated. To further improve the removal efficiency and enhance the practicality, potassium peroxymonosulfate (PMS) was added to the system due to its Fenton-like effect. Then, an Fe/Co/C composite was used with PMS to remove Congo red (CR) with a 98% removal of 250 mg·L−1. Moreover, for its high saturation magnetization of 85.4 emu·g−1, the Fe/Co/C composite can be easily recovered by applying a magnetic field, solving the problem that powdery functional materials are difficult to recover and, thus, avoiding secondary pollution. Furthermore, since the composite material was doped before carbonization, this synthetic strategy is flexible and the required metal elements can be added at will to achieve different purposes. This study demonstrates that this Fe-doped, ZIF-67 derived magnetic material has potential application prospects for dye adsorption.
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Journal of Energy Storage
·
2024
·
IF 8.9
Ye Liu,Kunting Lei,Shaoxiong Liu,Rui Yin,Minghai Zhao,Zhifeng Huang,Hai Hu,Li Liu
In this paper, a novel selenium-doped carbon nanosheet-decorated FeSe x -SnSe/C nanofibers (FeSnSe/SCNFs) composites have been prepared by electrostatic spinning. The unique morphology and structure endow the material with good electrochemical properties. The composite designated as FeSnSe/SCNFs-1, which has a molar ratio of 2:1 between Fe and Sn, performs best electrochemically. FeSnSe/SCNFs-1 anodes show a high reversible capacity of 816.1 mAh g −1 at 100 mA g −1 in lithium-ion batteries, and maintain a capacity of 414.8 mAh g −1 at 5000 mA g −1 . After 800 cycles at 1000 mA g −1 , it exhibits a capacity of 551.8 mAh g −1 , and after 100 cycles in potassium ion batteries at 100 mA g −1 , the capacity is 316.3 mAh g −1 with a retention rate of 90.5 % compared to the second cycle's capacity. This paper offers a novel approach to enhancing metal selenides' anode material performance for lithium/potassium ion batteries.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zheng Lu,Xuyang Wu,Xiaoqing Zhang,Chun Wang,Tong Zhang,Kang Li,Furui Gu,Chun Li,Wei Yuan,Yong Tang
Owing to their excellent theoretical capacity, the metal oxide/carbon composites derived from metal-organic frameworks (MOFs) show significant potentials as excellent anodes for lithium-ion batteries (LIBs). However, the metal oxides in the MOF-derivatives are usually in the form of crystals, resulting in the poor electrochemical performance. In this study, the pore-rich Co/MnO@C composite with low crystallinity (Co/MnO-LC@C) was in-situ synthesized via the pyrolysis of MnCo-MOF-74 precursor and proposed as advanced anode for LIBs. The active materials with low crystallinity uniformly distributed within the carbon skeleton exhibit an excellent discharge capacity with a superior cycling stability. The reversible capacity of the proposed Co/MnO-LC@C composite can be as high as 710 mA h g −1 at 1 A g −1 over 900 cycles. In addition, the composite can retain a remarkable specific capacity of 200 mA h g −1 with zero capacity decay over 3500 cycles at 10 A g −1 . The notably improved electrochemical performance is attributed to the rich pore structure, carbon skeleton structure, high specific surface area along with active materials with low crystallinity, leading to the alleviated volume expansion and facilitated lithium-ion transport characteristics. This work is expected to provide an innovative aspect for developing advanced anodes for LIBs.
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ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Po Jin,Ya-nan Zhang,Zhong Li,Wanlu Zheng,Liangliang Cheng,Like Li,Xuegang Li,Yong Zhao
Background The concentration of cytochrome C is demonstrated to be an effective indicator of the microbial corrosion strength of metals. Traditional cytochrome C sensor can detect cytochrome C with a low detection limit, but their use is limited by their high cost, cumbersome operation, and susceptibility to malignant environments. In addition, studies on the monitoring of cytochrome C in the field of microbial corrosion has still not been carried out. Therefore, there is a need for a highly sensitive, selective, low-cost, anti-interference, and stable cytochrome C sensor with online monitoring and remote sensing capabilities for in-situ measurement of microbial corrosion strength. Results This paper proposed a highly sensitive label-free fiber-optic sensor based on Mach-Zehnder interferometer (MZI) for in-situ measurement of the microbial corrosion marker cytochrome C. Two-dimensional Ti 2 C-MXene material is uniformly immobilized onto the surface of the sensing area to improve the sensitivity, hydrophilicity , and specific surface area of the sensing area, as well as to facilitate the immobilization of specific sensitive materials. The cytochrome C antibody is modified on the surface of Ti 2 C-MXene to specifically recognize cytochrome C, whose concentration variation can be measured by monitoring the spectral shift of MZI sensor. Results demonstrate a measurement sensitivity of 1.428 nm/μM for cytochrome C concentrations ranging from 0 to 7.04 μM. The detection limit of the sensor is calculated to be 0.392 μM with remarkable performance, including selectivity , stability, and reliability. Besides, the measurement result of the proposed sensor in real microbial corrosive environment is consistent with that of the ideal environment. Significance and novelty This is the first instance of achieving in-situ and label-free measurement of cytochrome C by using a fiber-optic MZI sensor, which undoubtedly provides a feasible solution for the effective monitoring of microbial metal corrosion in the environment.
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