CARBON
·
2024
·
IF 10.5
Liang Yin,Yiqian Wang,Ziqi Zhao,Yuyan Liu,Ningning Cao,Ting Shi,Xiaolong Zhang,Zhen Yu,Jingfeng Wang,Zhimin Fan
MXene (Ti 3 C 2 T x ) nanosheets produced through wet etching are typically obtained as low-concentration (<1 wt%) aqueous dispersions, leading to challenges like easy oxidation, high storage and transportation costs, and difficulties in direct processing. Here, we introduce a rapid and efficient technique to capture and semi-solidify single-layer MXene nanosheets using an erasable capture agent, transforming low-concentration MXene dispersions into high-solid-content (>85 wt%) semi-solids within minutes. This approach preserves the intrinsic properties of the MXene, imparts long-term stability, and enables reversible redispersibility. Importantly, the capture agent is fully removable without special treatment and can be recycled. Moreover, the method generalizes to other MXene compositions (e.g., Ti 2 CT x ) and hydrophilic two-dimensional materials such as graphene oxide. Devices fabricated from semi-solid MXene stored for extended periods exhibit excellent functionalities including infrared stealth, Joule heating, electrochemical energy storage, and electromagnetic interference shielding. This rapid capture and semi-solidification strategy significantly streamlines the transition from MXene synthesis to practical applications, paving the way for industrial-scale utilization of MXene.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Xingtao Zhao,Yakun Guo,Zekun Jing,Xue Liu,Ruidong Liu,Ran Tao,Tianyu Cai,Yingjun Li,Yuanlin Zhou,Maobing Shuai
Organic getters are often introduced into sealed systems to remove the excessive reactive hydrogen gas . In this work, the formable graphene aerogel hydrogen getters are prepared by integrating the alkyne-containing molecules (e.g., DEB) into the palladium-loaded three-dimensional layered porous graphene aerogel (Pd-GA). The performance of Pd-GA/DEB composite materials in reducing reactive hydrogen gas is examined at pressures of 0.1–1 bar at a temperature of 25 °C, and the hydrogen consumption is measured as a function of time. Results suggest that the hydrogen uptake capability of Pd-GA/DEB getters increases with the loading of Pd particles on the GA and the content of Pd 0 . The highest hydrogen absorption capacity is up to 215.5 cm 3 /g, and the hydrogenation rate of DEB molecules is 89.3%. This study promotes the fundamental understanding of solid-phase catalytic hydrogenation and the applications of 3D layered porous graphene aerogel in hydrogen absorption.
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
CHINESE JOURNAL OF POLYMER SCIENCE
·
2024
·
IF 4.1
Zhang Xin-Rao,Wang Fu-Shan,Wang Xin,Gao Yan,Zhang Hong-Xing,Liu Zhi-Qin,Feng Jia-Chun
Although Ziegler-Natta (Z-N) polyolefins have been widely used as raw materials to produce pharmaceutical or food packaging, the migration of acid scavengers, an additive usually introduced in Z-N polyolefins, from the packaging to its contents has not been reported. In this work, the migration of the two most used acid scavengers, calcium stearate (CaSt 2 ) and zinc stearate (ZnSt 2 ), from a Z-N polypropylene random copolymer (PPR) into water during autoclaving at 121 °C were comparatively investigated. It was found that, for PPR plates containing 0.1 wt% CaSt 2 or ZnSt 2 (PPR-0.1CaSt 2 , PPR-0.1ZnSt 2 , respectively), the concentration of migrated calcium ion into water increased with autoclaving time, while that of zinc ion was much lower at same treatment durations and did not show a significant increase with treatment time. Interestingly, after removing all plates and acidification treatment, a considerable amount of stearic acid was detected in sterilized water for PPR-0.1ZnSt 2 , but no such significant stearic acid was detected in sterilized water for PPR-0.1CaSt 2 . Based on the structural evolution of the two soaps upon heating, possible mechanisms for the different migration behavior of CaSt 2 and ZnSt 2 from PPR into water during autoclaving treatment were proposed. Our results suggest that the migration issue of acid scavengers is worthy of attention in pharmaceutical packaging materials produced from Z-N polyolefins.
研究领域:
材料科学
·
食品科学
·
药学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 15
·5730
·
IF 4.6
Zhi Wang,Changmin Shi,Pengfei Li,Wenzhu Wang,Wenzhen Xiao,Ting Sun,Jing Zhang
B-site cobalt (Co)-doped rare-earth orthoferrites ReFeO3have shown considerable enhancement in physical properties compared to their parent counterparts, and Co-doped LuFeO3has rarely been reported. In this work, LuFe1−xCoxO3(x = 0, 0.05, 0.1, 0.15) powders have been successfully prepared by a mechanochemical activation-assisted solid-state reaction (MAS) method at 1100 °C for 2 h. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy studies demonstrated that a shrinkage in lattice parameters emerges when B-site Fe ions are substituted by Co ions. The morphology and elemental distribution were investigated by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The UV–visible absorbance spectra show that LuFe0.85Co0.15O3powders have a narrower bandgap (1.75 eV) and higher absorbance than those of LuFeO3(2.06 eV), obviously improving the light utilization efficiency. Additionally, LuFe0.85Co0.15O3powders represent a higher photocatalytic capacity than LuFeO3powders and can almost completely degrade MO in 5.5 h with the assistance of oxalic acid under visible irradiation. We believe that the present study will promote the application of orthorhombic LuFeO3in photocatalysis.Keywords:cobalt doping;rare-earth orthoferrites;optical properties;photocatalysis;hole scavengers
研究领域:
材料科学
·
光催化领域
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2013
·
IF 4.612
Dan Tang,Jia-Xiao Zhu,An-Guo Wu,You-Hua Xu,Ting-Ting Duan,Zhao-Guang Zheng,Ru-Shang Wang,Dan Li,Quan Zhu
Methylglyoxal (MGO), a very reactive metabolite of glucose, plays a pivotal role in the pathogenesis of several chronic diseases associated with diabetes, and it has been validated as an attractive target for them. In the present study, a simple and effective method, namely pre-column incubation followed by fast high performance liquid chromatography based on superficially porous particles (shell), coupled with diode array detection and tandem mass spectrometry (UHPLC-DAD-MS n ), was proposed for rapid and high-throughput screening of natural MGO scavengers directly from the crude extract of Polygonum cuspidatum Sieb. et Zucc, a well-known traditional Chinese medicine which was used for treatment of diabetic complications. The hypothesis is that upon reaction with MGO, the peak areas of components with MGO scavenging potency in the chromatogram will be significantly reduced or disappear, and the structural characterization could be achieved by UHPLC-DAD-MS n hyphenated technique. First of all, 12 compounds in P. cuspidatum were well separated within shorter time (∼12 min) than previous methods and identified, and two of them, i.e. 3,5,4′-trihydroxystilbene-3 -O -(6″-galloyl)-glucoside ( 3 ) and emodin-8 -O -(6′-malonyl)-glucoside ( 8 ) were firstly reported ingredients. After incubation with MGO, four stilbene derivatives were demonstrated to possess potential MGO trapping activities. Furthermore, it was proved that both polydatin (piceid) and resveratrol exhibited effective MGO-trapping capacity by UHPLC analysis, and they could significantly inhibit the formation of advanced glycation end products (AGEs) in the human serum albumin (HSA)-MGO assay, indicating that they were potential candidate agents for delaying and preventing diabetic complications. Additionally, MGO trapping mechanism exploration by UHPLC-MS n showed that the positions 2 and 4 of the A ring of stilbene were major active sites for trapping MGO to form both mono- and di-MGO adducts, however, the glucosylation of the hydroxyl group would significantly decrease the trapping efficiency. Collectively, the current work provides a very promising method for rapid discovery of natural MGO scavengers directly from complex matrices such as herbal medicines with huge resources.
研究领域:
药理学
·
分析化学
·
糖尿病研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2017
·
IF 4.364
Xiao Du,Jun Wan,Jia Jia,Chao Pan,Xiaoyun Hu,Jun Fan,Enzhou Liu
Ag 3 PO 4 -Bi 2 MoO 6 heterojunctions with visible-light photocatalytic activity were successfully fabricated via a deposition-precipitation method. The investigation shows that Ag 3 PO 4 -Bi 2 MoO 6 composites exhibit enhanced visible light harvesting ability and better degradation efficiency for RhB compared with Bi 2 MoO 6 and Ag 3 PO 4 under visible light irradiation (λ > 420 nm). What's more, we found that the activity and the stability of Ag 3 PO 4 -Bi 2 MoO 6 heterojunction could be further improved by adding of H 2 O 2 in the RhB reaction solution. The enhanced photocatalytic performance and structure stability are primarily attributed to the efficient charge carrier separation of the heterojunction formed by Ag 3 PO 4 and Bi 2 MoO 6 , and the electron capturing property of H 2 O 2 on the surface of Ag 3 PO 4 -Bi 2 MoO 6 composites, leading to a highly efficient removal of RhB using the Ag 3 PO 4 -Bi 2 MoO 6 -H 2 O 2 system. In addition, the active species trapping experiments indicate that h + and •O 2 – play important roles during the photocatalytic degradation process . This work suggests that the H 2 O 2 assisted Ag 3 PO 4 -Bi 2 MoO 6 heterojunction system could be a potential promising photocatalyst for environmental 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
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2024
·
IF 3
Zou Yanyan,Pau Dennis,Yi Linlin,Li Yaoqiang,Li Kaiyuan
13X zeolite–calcium oxide (CaO) composite capture agent application in the pyrolysis recovery of polyvinyl chloride (PVC)-based waste cables was investigated in this research to elucidate the agent’s efficiency in capturing chlorine (Cl) and carbon (C) during pyrolysis. The 13X zeolite–CaO mixture is subjected to separate pyrolysis of the PVC-based cable outer sheath in experimental furnaces of simulated solar-powered and thermogravimetry. Subsequently, a range of spectroscopic techniques are employed to quantitatively analyze the gaseous and solid products resulting from the pyrolysis process. Through X-ray fluorescence, total carbon, and other analyses, the research outcomes demonstrated that the capture agent exhibits superior Cl and C capture performance compared to using a single agent for plastic pyrolysis. The yield of Cl element in the solid residue has increased significantly by 130–140% under the presence of optimized composite capture agent. By determining the dynamic changes of gaseous and solid products during the cable outer sheath pyrolysis, the influence of the capture agent on the redistribution and transformation mechanisms of Cl and C elements was identified, and it was found that contaminating volatiles were well immobilized in the solid residue. This research provides a new solution for efficient Cl and C capture in the pyrolysis recovery of waste cables and determines the fixation and transformation mechanisms of Cl and C elements by the composite capture agent, indicating a potential for feasible and sustainable resource utilization of waste cables.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Xueyi Guo,Weijia Wang,Xiuhong Yuan,Ying Yang,Qinghua Tian,Yang Xiang,Yan Sun,Zhiming Bai
Magnetic nano capture agent (MNCA)-based magnetic separation is considered as a promising approach to rapidly isolate heavy metals from blood. Limited removal efficiency and potential biosafety risks are the major challenges for the clinical use of MNCA-based magnetic separation. Here, we report a highly-efficient MNCA-based magnetic separation of heavy metals from blood in continuous multi-stage adsorption mode. The interactions between MNCA and blood components ( e.g. blood cells and plasma proteins) and the MNCA-induced cellular immune responses are studied in detail. The distribution and redistribution of heavy metals in blood are quantitatively analyzed. It demonstrates that concentration dependent redistribution can increase the contact between heavy metals and MNCA, leading to improvement on heavy metal removal efficiency. The removal performance is tested in batch mode and in continuous mode. Results show that 97.97% of Pb and 96.53% of Cd are removed from blood in 120 min using continuous multi-stage adsorption mode, and the residual concentrations of Pb and Cd in blood decrease from 400 μg L −1 to 8.11 μg L −1 and 13.84 μg L −1 , respectively. This study paves an effective way for heavy metal intoxication therapy by MNCA-based magnetic separation.
研究领域:
环境科学
·
生物医学工程
·
纳米技术
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Xueyi Guo,Weijia Wang,Ying Yang,Qinghua Tian,Yang Xiang,Yan Sun,Zhiming Bai
Magnetic nano capture agent (MNCA)-based magnetic separation can remove heavy metals from blood efficiently and safely. It has been considered as the next-generation therapy for heavy metal intoxication. In this work, we report the first use of MNCA to remove arsenic (As) with high efficiency from blood. MNCA with a flexible, non-covalent and biocompatible surface layer has been synthesized by packaging cetyltrimethylammonium bromide (CTAB) and bovine serum albumin (BSA) together with oleic acid coated magnetic iron oxide nanoparticles (MNP@OA) via Van der Waals force. This surface layer enhances arsenic anion diffusion from the surface to the binding sites, leading to increased arsenic removal performance of MNCA. The adsorption capacities of BSA and CTAB enfolded MNP@OA (MNP@CTAB-BSA) for As (III) and As (V) are 131.00 mg g −1 and 119.58 mg g −1 , respectively. 89.02% of As (III) and 81.78% of As (V) are removed from blood using MNP@CTAB-BSA, and the residual concentrations of As (III) and As (V) in blood decrease from 400.00 μg L −1 to 43.93 μg L −1 and 72.88 μg L −1 , respectively. The as-synthesized MNP@CTAB-BSA shows excellent biocompatibility. Under operation condition, only 0.80% of hemolysis and 1.64% of plasma protein adsorption are induced by MNP@CTAB-BSA, and the cell viability of peripheral blood mononuclear cells (PBMCs) is more than 95.53%. This study paves a fast, safe and effective way for arsenic intoxication therapy.
研究领域:
纳米技术
·
环境科学
·
毒理学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Lifang Chen,Haiyang Zheng,Aimin Li,Xin Qiu,Lian Wang
The photocatalytic reduction of nitrate has received considerable attention due to its high efficiency and environmentally friendly nature. The excessive addition of hole scavengers is the most commonly used method to increase the nitrate reduction efficiency. However, achieving high selectivity in the photocatalytic reduction of nitrate to N 2 with low concentration of hole scavengers remains challenging. In this study, the SrFe x Ti 1−x O 3 /TiO 2 S-scheme heterojunction photocatalysts with many Lewis acidic adsorption sites have been developed. The experimental results demonstrated that the incorporation of 6% Fe into SrFe 0.06 Ti 0.94 O 3 /TiO 2 (SFTO6) resulted in the nitrate conversion rate of 97.68% and the N 2 selectivity reached 96.35% with 25 mmol/L formic acid . Moreover, it also exhibited excellent stability and recycle ability. After 5 cycles, SFTO6 still exhibited a stable photocatalytic denitration efficiency of 92.94%, highlighting its potential for practical application. Through comprehensive mechanistic investigations, enhancing direct reduction process is considered the key to its high reduction efficiency with low formic acid . And the Lewis acidic adsorption sites enhance N 2 selectivity by enriching NO x − on the surface of the material. Overall, this study provides a novel approach for achieving efficient photocatalytic reduction of nitrate to N 2 under conditions with low concentration of hole scavengers.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2015
·
IF 4.529
Ruowen Liang,Fenfen Jing,Lijuan Shen,Na Qin,Ling Wu
A bifunctional photocatalyst-Fe-benzenedicarboxylate (MIL-53(Fe)) has been synthesized successfully via a facile solvothermal method. The resulting MIL-53(Fe) photocatalyst exhibited an excellent visible light ( λ ≥ 420 nm) photocatalytic activity for the reduction of Cr(VI), the reduction rate have reached about 100% after 40 min of visible light irradiation, which has been more efficient than that of N-doped TiO 2 (85%) under identical experimental conditions. Further experimental results have revealed that the photocatalytic activity of MIL-53(Fe) for the reduction of Cr(VI) can be drastically affected by the pH value of the reaction solution, the hole scavenger and atmosphere. Moreover, MIL-53(Fe) has exhibited considerable photocatalytic activity in the mixed systems (Cr(VI)/dyes). After 6 h of visible light illumination, the reduction ratio of Cr(VI) and the degradation ratio of dyes have been exceed 60% and 80%, respectively. More significantly, the synergistic effect can also be found during the process of photocatalytic treatment of Cr(VI) contained wastewater under the same photocatalytic reaction conditions, which makes it a potential candidate for environmental restoration. Finally, a possible reaction mechanism has also been investigated in detail.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Energy
·
2025
·Vol. 10
·期 12
·1470-1481
·
IF 60.1
Xu Yue,Li Tianyu,Peng Zhangquan,Xie Congxin,Li Xianfeng
Flow batteries are promising for renewable energy storage due to their safety and scalability. Zinc/bromine flow batteries (Zn/Br) are popular due to their high energy densities and inexpensive electrolytes. However, they have a poor service life and lead to environmental harm as a result of the generated corrosive and volatile Br 2 . Here we introduce a Br 2 scavenger to the catholyte, reducing the Br 2 concentration to an acceptable level (~7 mM). The scavenger, sodium sulfamate (SANa), reacts rapidly with Br 2 to form a mild product, N -bromo sodium sulfamate (Br-SANa; Br + ). Additionally, the two-electron transfer reaction of Br-SANa/Br − (Br + /Br − ) increases the energy density. We have developed a Zn/Br flow battery, paired with a Zn anode, that outperforms traditional Zn/Br flow batteries in energy density (152 Wh l −1 versus 90 Wh l −1 ) and cycle life (>600 versus 30 cycles), using a sulfonated polyetheretherketone membrane. We assembled a 5-kW stack that operated stably for over 700 cycles (~1,400 h). Using this reaction, we have built a large-scale battery system.
研究领域:
储能
·
电化学
·
可再生能源
·
液流电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）