JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Eryue Song,Kaifeng Wei,Haiqian Lian,Jingxian Hua,Hongxu Tao,Tingting Wu,Yichang Pan,Weihong Xing
Metal-organic frameworks (MOFs) used as molecular sieve membranes materials to gas separation has attracted much attention. However, the separation performance was also limited by its intrinsic flexibility of frameworks. Controlling its flexibility is still a big challenge. Herein, the doping of 2-aminobenzimidazole (ambz) into the ZIF-8 framework can obviously improve its original rigidity, which is due to the improved rigidity of the Zn‒N bond. Correspondingly, the high-quality doped ZIF-8 membrane for effective separation of C 3 H 6 /C 3 H 8 mixture were also fabricated. Compared with the permeation results on pure ZIF-8 membranes, the ambz-doped ZIF-8 membrane exhibited two specific transportation performance improvements. The first was that drop extent of C 3 H 6 /C 3 H 8 selectivity on the doped ZIF-8 membrane with the increase in feeding pressure was decreased, and the selectivity was also irreversible as the feeding pressure was released. This phenomenon was attributed to improved rigidity of the framework. The second was that the C 3 H 6 permeance was almost independent on the permeating temperature, which was also totally different with that on the pure ZIF-8 membrane, resulting from the significant change of adsorptive heat and diffusion energy of propylene on the ambz-doped ZIF-8 membrane. Therefore, this ambz-doped ZIF-8 membrane is promising in real world C 3 H 6 /C 3 H 8 separation.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2025
·
IF 3.3
Caicai Liu,Ran Li,Peng Yun,Fuzun Chen,Yu-E Shi,Xiaobo Zhu,Zhenguang Wang
Detection and discrimination of neonicotinoid insecticides (NNI) are highly desired but still a challenging task, due to the minor difference in molecular structures among massive subtypes of NNI. In this work, a room-temperature phosphorescence (RTP) sensor array for the detection and discrimination of NNI was fabricated aided by a host-guest doping strategy. NNI was doped into the boric acid host, which prompted their RTP intensities, through inhibiting the molecular motion, narrowing the energy gap between singlet and triplet states, and providing rigid protection structures. A sensor array was fabricated through integrating the RTP intensities and emission lifetimes Five types of NNI were quantitatively detected and discriminated by using statistical algorithms. Aided by the delayed collection model of RTP signal, the sensor array also showed excellent detection performances in practical food samples. These results opened a new door for designing detection route, showing great potential for applications in food analysis.
研究领域:
分析化学
·
食品安全
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Fangfang Dong,Shengrui Cui,Chengliang Lin,Xin Wan,Ning Wang,Xiang Huang,Wei Liu,Yongcheng Jin
The insufficient structural stability of high-voltage spinel cobalt-free LiNi 0.5 Mn 1.5 O 4 (LNMO) throughout the cycling process hinders its widespread application. To address these issues, we incorporate elemental iodine into LNMO during the precursor preparation process using an ethanol-assisted hydrothermal method and successfully modify the bulk and interface coating structure of LNMO-3% I 2 . The incorporation of iodine not only induces the formation of a cavity and fast lithium-ion transfer pathway within the particles but also facilitates the development of a thin LiI coating layer on the surface of cathode materials. Compared with bared LNMO, LNMO-3% I 2 exhibits a capacity retention of 90.31% following 500 cycles at 1C and a capacity retention of 88.74% even following 450cycles at a high-rate of 50C. Furthermore, the cells with LNMO-3% I 2 demonstrate an excellent electrochemical performance under both high temperatures of 40 ℃ and low temperatures of −15 ℃. This study offers valuable insights into the simultaneous optimization of internal and external structures in cathode materials, thereby enhancing the long-term cycling performance of high-voltage lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Song Shen,Yu-e Shi,Mingyuan Yin,Zhenguang Wang
Detection and discrimination of fluoroquinolones (FQs) are crucial for food safety but remain a formidable challenge due to their minor differences in molecular structures and the serious interferences from food matrices. Herein, we propose an afterglow assay for the detection and discrimination of FQs through modulating their room-temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF) properties by a host–guest doping strategy. FQs were doped into the boric acid host, forming boronic anhydride structures and hydrogen bonds, which prompted the RTP and TADF performance of FQs by stabilizing their excited states, preventing triplet exciton quenching, and reducing the energy gap between singlet and triplet states. The FQs can be quantitatively detected through monitoring the afterglow intensity of host–guest systems, as low as 0.25 μg/mL. The differences in the afterglow intensity and emission lifetime allowed accurate discrimination of 11 types of FQs through pattern recognition methods. Aided by the delayed signal detection model of afterglow emission, the background signal and the interferences from food matrices were effectively eliminated, which endow the detection and discrimination of mixed FQs in commercial meat samples, without multiple-step separation processes.
研究领域:
食品安全
·
分析化学
·
药物检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 33
·2204192
·
IF 17.521
Jiongwei Shan,Wei Wang,Bing Zhang,Xinying Wang,Weiliang Zhou,Liguo Yue,Yunyong Li
Designing dense thick sulfur cathodes to gain high-volumetric/areal-capacity lithium–sulfur batteries (LSBs) in lean electrolytes is extremely desired. Nevertheless, the severe Li 2 S clogging and unclear mechanism seriously hinder its development. Herein, an integrated strategy is developed to manipulate Li 2 S redox kinetics of CoP/MXene catalyst via electron-donor Cu doping. Meanwhile a dense S/Cu 0.1 Co 0.9 P/MXene cathode (density = 1.95 g cm −3 ) is constructed, which presents a large volumetric capacity of 1664 Ah L −1 (routine electrolyte) and a high areal capacity of ≈8.3 mAh cm −2 (lean electrolyte of 5.0 µL mg s −1 ) at 0.1 C. Systematical thermodynamics, kinetics, and theoretical simulation confirm that electron-donor Cu doping induces the charge accumulation of Co atoms to form more chemical bonding with polysulfides, whereas weakens Co S bonding energy and generates abundant lattice vacancies and active sites to facilitate the diffusion and catalysis of polysulfides/Li 2 S on electrocatalyst surface, thereby decreasing the diffusion energy barrier and activation energy of Li 2 S nucleation and dissolution, boosting Li 2 S redox kinetics, and inhibiting shuttling in the dense thick sulfur cathode. This work deeply understands the atomic-level manipulation mechanism of Li 2 S redox kinetics and provides dependable principles for designing high-volumetric-energy-density, lean-electrolyte LSBs through integrating bidirectional electro-catalysts with manipulated Li 2 S redox and dense-sulfur engineering.
研究领域:
材料化学
·
电化学
·
能源存储
·
纳米催化
·
固态离子学
·
先进电池技术
✓ 已验证
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-8
·
IF 16.6
Chen Biao,Huang Wenhuan,Zhang Guoqing
Pure organic room-temperature phosphorescence (RTP), particularly from guest-host doped systems, has seen exponential growth in the last several years due to their high modulation flexibility, and yet challenges remain with respect to mechanistic elucidations and advantageous applications. Here we show that by constructing guest-host doped RTP systems from chiral components, namely, chiral amino compound-modified phthalimide hosts and naphthalimide guests, a chiral-selective RTP enhancement phenomenon can be observed. For example, R -enantiomeric guests in R -enantiomeric hosts produce strong red RTP afterglow while no appreciable RTP could be observed in the S-R guest-host counterpart. An unprecedented RTP intensity difference > 10 2 folds with the ability to distinguish an enantiomeric excess of 98% could be achieved. Temperature-dependent measurements suggest that a chirality-dependent energy transfer process may be involved in the observed phenomenon, which can be harnessed to extend the RTP application to the chiral recognition of amino compounds, such as amino alcohols.
研究领域:
材料科学
·
物理化学
·
光学材料
·
有机化学
✓ 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）