ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiaofeng Lai,Song Wang,Ying Xie,Binghang Liu,Jianhui Sun,Yuxin Li,Haitao Yu,Kai Pan
CsPbBr3 perovskite nanocrystals have emerged as promising candidates for photocatalysis. However, their conversion efficiency is hampered by material instability, and the accumulation of deactivated perovskites produced after photocatalytic reactions raises significant environmental concerns. To address this issue, we developed a mechanochemical grinding approach assisted by oleylamine as an additive to restore the optical properties and photocatalytic activity of deactivated CsPbBr3, which was due to aggregation in the photocatalytic CO2 reduction reaction. Upon regeneration, the CsPbBr3 nanocrystals exhibited an average length of 34.21 nm and an average width of 20.86 nm, demonstrating optical properties comparable to those of the pristine CsPbBr3 nanocrystals. Moreover, they achieved a conversion efficiency of 88.7% compared with pristine CsPbBr3 nanocrystals in the photocatalytic CO2 reduction reaction. This method effectively enhanced the utilization of CsPbBr3, offering a novel approach for the recycling and recovery of perovskite materials and thereby minimizing material waste and environmental pollution.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 13
·7447-7461
·
IF 4.21
Zhang Caihong,Wu Min,Yang Shuang,Song Xueping,Xu Ying
Abstract The low yield and size nonuniformity of cellulose nanofibrils (CNFs) prepared by mechanical grinding restrict their extensive application in many fields. In this study, microfibrillated cellulose (MFC) with varying grinding time (0–2.5 h) was post-treated with endoglucanase (EG) to improve the yield and size uniformity of the CNFs. With the same grinding time, the yield of the CNFs post-treated with EG increased approximately one-fold, and the diameter of the microfibrils decreased according to the SEM and TEM images. The yield of the CNFs ground for 0.5 h and post-treated by EG was similar to that of the sample ground for 2.5 h, and approximately 26.1 kWh/kg mechanical grinding energy were saved by the EG post-treatment while obtaining the same CNF yield. There was an abundance of micropores that affected the specific surface area of samples, and the width of the micropores was centered between 1.3 and 2.0 nm. The crystallinity index (CrI) of the MFC decreased gradually from 74.90 to 69.30% with prolonged grinding time, whereas the CrI of the samples post-treated by EG slightly increased between 1.7 and 3.0%. The tensile strength and elongation at break of the films prepared by the EG post-treated samples slightly decreased, while the Young’s modulus and transmittance increased. This study provides a valid and an eco-friendly biological method to improve the yield and size uniformity of CNFs and reduce energy consumption. Graphic abstract
研究领域:
材料科学
·
生物技术
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2024
·
IF 1.3
Rusi Hao,Wenliang Sun
Lithium iron phosphate (LiFePO 4 , LFP) is a frequently utilized cathode material for lithium-ion batteries. However, its practical applications are constrained by its relatively low ionic and electronic conductivities. To address this issue, it is possible to utilize highly conductive metallic coatings to enhance the material's electronic conductivity. Herein, LiFePO 4 with Cu composites (LFP/Cu) as cathode was synthesized by a simple solid-state process via one-step grinding in the presence of CuNO 3 and ascorbic acid. The discharge capacity of the LFP/Cu cathode with 0.75 wt% Cu was found to be 160.9 mA h g −1 at 0.1 C, representing a close approximation of its theoretical capacity and a notable enhancement compared to pure LFP (145.9 mA h g −1 ). Furthermore, it demonstrates excellent stability with a capacity retention of 136.5 mA h g −1 after 100 cycles at 2 C, as well as good rate performance. The electrochemical impedance spectra demonstrate that the incorporation of copper results in a further reduction in the resistance of LFP/Cu compared to pure LFP. The incorporation of copper particles into lithium iron phosphate has been shown to enhance its electronic conductivity, thereby further enhancing its electrochemical performance. In this study, we present a facile and cost-effective room-temperature synthesis method for the preparation of LiFePO 4 /Cu composites with improved electrochemical properties. This work provides a promising avenue for the design of cathode materials in lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2024
·Vol. 26
·期 12
·7312-7319
·
IF 9.3
Hao-Cheng Wang,Xiao Liu,Jian-Gong Ma,Peng Cheng
Green and economical synthetic approaches for metal–organic frameworks (MOFs) and incorporating multiple functionalities into MOF matrixes are of great interest for wide applications. Herein, we developed a rapid, high-throughput and universal centrifuge tube grinding (CTG) synthetic strategy for the synthesis of a series of popular MOFs in centrifuge tubes. Significantly, a variety of catalytic and optically active organic, biological and complex molecules were incorporated into the in situ formed defects of MOF skeletons by one-pot CTG synthesis to achieve various novel MOF-encapsulated composite materials. Types of MOFs as well as different composites can be rapidly and greenly synthesized simultaneously in centrifuge tubes with different sizes on a single vortex mixer even on a gram scale. Our strategy provides a facile route for the incorporation of multiple functionalities, especially large active molecules, into MOFs and for greenly affording various MOF-based materials towards various applications in diverse areas.
研究领域:
材料科学
·
化学工程
·
催化与光学材料
✓ 已验证
产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2022
·
IF 7.425
Wei Jia,Zibian Fan,An Du,Lin Shi
Ultrahigh-pressure homogenization is a powerful technique for accelerating Baijiu ageing. In this study, the molecular mechanism of artificial ageing was thoroughly investigated utilizing foodomics combined with a mass spectrum information optimization program. Various characterizations of compounds in the ageing process were performed through ultra high performance liquid chromatography quadrupole-orbitrap high resolution mass spectrometry (UHPLC-Q-Orbitrap) based colloid theoretics. High-pressure shear grinding provides a high-pressure and high-temperature environment for Baijiu, accelerating the formation of flavour compounds and the decomposition of odour and harmful substances, thus improving the sensory characteristics of Feng-flavour Baijiu and shortening the ageing time. A total of 2069 substances were identified according to fragment spectra and Bayesian network model-based peak distribution. Molecules with VIP > 1, including 14 esters, 10 acids, 4 ketones, 3 aldehydes, 2 alcohols and 2 phenols, were quantified as potential markers of chemometric analysis. A novel prediction model for Baijiu ageing degree was furnished, and ageing years of Feng-flavour Chinese Baijiu were accurately predicted by factor analysis with KMO 0.784 and a polynomial regression model with r 0.94. The results demonstrated that in 400 bar, fresh distilled Baijiu could reach a natural ageing effect of 6.43 years, which was consistent with the sensory evaluation.
研究领域:
食品科学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Wanwei Jiang,Xijun Xu,Yuxuan Liu,Liang Tan,Fengchen Zhou,Zhiwei Xu,Renzong Hu
Aqueous zinc-ion batteries have emerged as prospective energy storage devices to partly replace organic ion batteries due to their high safety and eco-friendliness. Providing multifold synthesis methods of cathode materials is essential for Zn-ion battery development. Here, we demonstrated a practical strategy for the large-scale fabrication of high performance β-MnO 2 @C hybrid cathode materials by plasma assisted milling (P-milling). After P-milling for 10 h, the porous hybrid microparticles consisted of MnO 2 nanocrystallites , which combined and wrapped with the thin carbon layer derived from expanded graphite. The pores among the β-MnO 2 @C particles facilitated electrolyte infiltration during continuous cycling, while combining with carbon greatly enhanced the conductivity of the hybrids and helped to alleviate MnO 2 dissolution. Therefore, the β-MnO 2 @C hybrids delivered excellent cycle stability, with a high capacity of 130 mAh g −1 for 400 cycles at a current rate of 300 mA g −1 in an aqueous Zn(CF 3 SO 3 ) 2 electrolyte. This capacity retention was amongst the highest reported so far for MnO 2 -based cathode materials for Zn-ion batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
BIOMASS & BIOENERGY
·
2023
·
IF 6
Zhuqian Xiao,Jiajie Li,Hongpeng Wang,Qing Ge,Chuang Xing,Jun Huang,Jianbing Ji,Jianwei Mao
The controllable conversion of cellulose on heterogeneous catalysts is a promising strategy in biomass utilization . However, the catalysts in this field are fabricated by a conventional, calcination/hydrothermal method, both of which are time-consuming, high cost and limit their large-scale applications. In this study, we developed the mechanical force as an auxiliary method to fabricate nonmodel supported catalyst with the assistance of chitosan (CTS). The input kinetic energy facilitated strain refinement and microstructure defects generation by shear force and plastic deformations , which stimulated the metal precursors anchored in situ in the CTS matrix. Based on the interactions between metals (Ni and Sn) and nitrogen atoms , the single metal nanoparticles and intermetallic compounds (Ni x Sn y ) were well dispersed with 152 μmol/g of Lewis acid and 91 μmol/g of base amount by interaction with nitrogen sites. 62.8% of C 2,3 polyols were obtained from cellulose on 15%Ni–15%W/CTS catalyst. More importantly, this catalyst prepared by mechanochemical abrading demonstrated perfect stability with less than 2.0 ppm of etched metal cations for the eighth use in acidic hydrothermal conditions. In accordance, the nitrogen sites in the carbon matrix offered strong covalent bonds regarding as anchoring rope for stabilizing Ni species. This work potentially offers a facile but effective method for the development of supported Ni–Sn catalysts with possible large-scale production.
研究领域:
生物质转化
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2012
·Vol. 14
·期 6
·1994-1997
·
IF 3.842
Pipi Wang,Guanjun Li,Yiping Chen,Shangwen Chen,Stuart L. James,Wenbing Yuan
Using a small planetary ball mill, liquid-assisted grinding (LAG) of metal salts or oxides (ZnO, CdO, CdCO3, Cu(OAc)2·H2O, Co(OAc)2·4H2O, Mn(OAc)2·4H2O, Ni(OAc)2·4H2O, FeSO4·7H2O) with two equivalents of isonicotinic acid (HINA) and small amounts of water (up to 5.6 molar equivalents) gave discrete aquo complexes trans-[M(INA)2(OH2)4] (M = Zn, Cd, Cu, Fe, Co, Ni, Mn) efficiently within 30 min. For M = Zn, Cd and Cu these complexes readily undergo reversible formal dehydration to the extended network structures [M(INA)2] (M = Zn, Cu) or [Cd(INA)2(OH2)]·DMF by further LAG with non-aqueous liquids such as methanol or DMF. Overall, the mechanochemical dehydrations are more effective than heating or immersion in bulk solvents. The work demonstrates a two-step mechanochemical synthesis of coordination networks via discrete aquo complexes which may be preferable to single step reactions or grinding-annealing procedures in some cases. For example, the two step method was the only way to prepare [Cd(INA)2(OH2)]·DMF mechanochemically and the porous network Cu(INA)2 could not be obtained from the aquo complex by heating.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
PARTICULATE SCIENCE AND TECHNOLOGY
·
2025
·
IF 1.5
Yingying Wang,Zhenchao Ma,Yibo Kong,Bobo Zhou,Zhe Li
The coal gasification fly ash (CGFA) has low flotation efficiency and serious environmental pollution, due to the abundant oxygen-containing functional groups and developed pore structures. Herein, the grinding process and novel nano-mixed collectors were synergistically used on enhancing CGFA flotation, where the nano-mixed collectors were synthesized through nanoemulsifying and rapid-cooling method. The grinding time and nano-mixed collector compositions with different beeswax and kerosene contents were used to determine the optimum flotation process parameters. The results indicated that the removal rate of unburned carbon (RUC) for CGFA with optimum grinding process (12 min) and nano-mixed collector system (#4) exhibited significant higher value (92.48%) than that of raw CGFA samples (61.25%). The grinding process could obviously decrease the pore volumes and contents of oxygen-containing functional groups on CGFA surfaces, as well as reduce the average diameter of CGFA samples from 81.538 to 7.872 µm. Moreover, the application of novel nano-mixed collectors as flotation collectors could further improve the surface hydrophobicity, decrease the surface pore volumes, high wetting heat and low water adsorption capacity. Therefore, this study can provide a new approach for solving the problems of low flotation efficiency and improving the efficient utilization of CGFA.
研究领域:
环境科学
·
矿物加工工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today
·
2021
·
IF 31.041
Liusi Yang,Dashuai Wang,Minsu Liu,Heming Liu,Junyang Tan,Zhongyue Wang,Heyuan Zhou,Qiangmin Yu,Jingyun Wang,Junhao Lin,Xiaolong Zou,Ling Qiu,Hui-Ming Cheng,Bilu Liu
Two-dimensional (2D) materials have many promising applications, but their scalable production remains challenging. Herein, we develop a glue-assisted grinding exfoliation (GAGE) method in which the adhesive polymer acts as a glue to massively produce 2D materials with large lateral sizes, high quality, and high yield. Density functional theory simulation shows that the exfoliation mechanism involves the competition between the binding energy of selected polymers and the 2D materials which is larger than the exfoliation energy of the layered materials. Taking h-BN as an example, the GAGE produces 2D h-BN with an average lateral size of 2.18 μm and thickness of 3.91 nm. The method is also extended to produce various other 2D materials, including graphene, MoS 2 , WS 2 , Bi 2 O 2 Se, mica, vermiculite, and montmorillonite . Two representative applications of thus-produced 2D materials have been demonstrated, including 2D h-BN/polymer composites for insulating thermal conduction and 2D MoS 2 -based electrocatalysts for large-current-density hydrogen evolution , indicating the great potential of massively produced 2D materials.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Jian Cheng,Yue Qiang,Cui Zhou,Haokun Shi,Haichao Liu,Cong Geng,Yahong Xie
Commercial carbon-based perovskite solar cells have rapidly developed due to its low cost and long-term stability. However, commercial carbon paste as counter electrode always produces a large number of defects at the perovskite interface, thereby greatly affecting the performance of the perovskite solar cells . In this work, a grinding process is used to compact the thin carbon film . The process effectively eliminates defects and improves the extraction efficiency of holes from the photoexcited layer, resulting in 21.2% increase in the efficiency of the carbon-based perovskite solar cells. In addition, open-circuit voltage decay on the order of tens of seconds is analyzed in detail. A new capacitor-like model is established to successfully explain the hysteresis phenomenon . Perovskite solar cells show 700 h of stability with ground carbon counter electrode.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 3
·741
·
IF 4.927
Zhengqi Dong,Rui Wang,Mingyue Wang,Zheng Meng,Xiaotong Wang,Meihua Han,Yifei Guo,Xiangtao Wang
Naringenin (NRG) is a natural flavonoid compound abundantly present in citrus fruits and has the potential to treat respiratory disorders. However, the clinical therapeutic effect of NRG is limited by its low bioavailability due to poor solubility. To enhance the solubility, naringenin nanosuspensions (NRG-NSps) were prepared by applying tocopherol polyethylene glycol succinate (TPGS) as the nanocarrier via the media-milling method. The particle size, morphology, and drug-loading content of NRG-NSps were examined, and the stability was evaluated by detecting particle size changes in different physiological media. NRG-NSps exhibited a flaky appearance with a mean diameter of 216.9 nm, and the drug-loading content was 66.7%. NRG-NSps exhibited good storage stability and media stability. NRG-NSps presented a sustainable release profile, and the cumulative drug-release rate approached approximately 95% within 7 d. NRG-NSps improved the antitussive effect significantly compared with the original NRG, the cough frequency was decreased from 22 to 15 times, and the cough incubation period was prolonged from 85.3 to 121.6 s. Besides, NRG-NSps also enhanced expectorant effects significantly, and phenol red secretion was increased from 1.02 to 1.45 μg/mL. These results indicate that NRG-NSps could enhance the bioavailability of NRG significantly and possess a potential clinical application.Keywords:naringenin nanosuspension;media-milling method;bioavailability;antitussive effect;expectorant effect
研究领域:
药剂学
·
呼吸系统疾病
·
药物递送
✓ 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）