JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Hongyu Liu,Mengxin Xie,Bingli Pan,Bingchan Wang,Longlong Zhang,Yuxuan Zhou,Ning Li,Enxi Yue,Honggang Wang
The synergistic effect of nanoparticles can effectively improve the tribological performances of base oils. In this study, a novel lubricant additive by embedding 2D FeOCl on 2D Zn − MOF was reported for the first time in order to boost the tribological performances of polyethylene glycol (PEG200). The FeOCl/Zn − MOF prepared by a facile microwave assisted strategy was found to be a typical flower-like appearance, where FeOCl nanosheets decorated on the surface of Zn − MOF sheets. Owing to the electron transfer and synergistic effect between FeOCl and Zn − MOF, the novel FeOCl/Zn − MOF effectively reduced the coefficient of friction by 48 % and wear scar diameter by 88 % at the loading of 0.4 wt% FeOCl/Zn − MOF in the base oil. The work suggests the face-to-face combination of FeOCl and Zn − MOF for enhanced tribological performances, representing a new strategy to prepare efficient lubricant additives using assembled 2D nanomaterials.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2024
·Vol. 14
·期 4
·276
·
IF 3.8
Ting Bai,Xiaohui Li,Liang Ding,Jin Wang,Yong-Shan Xiao,Bin Cao
A series of Zn-modified HBeta (Zn/HBeta) catalysts were prepared via the wetness impregnation method with different zinc precursors such as ZnSO4·7H2O, ZnCl2, C4H6O4Zn·2H2O and Zn(NO3)2·6H2O, and their catalytic performance in the conversion of ethanol to propylene reaction was evaluated. Results indicate that the amount and strength distribution of the acid sites of the Zn/HBeta catalysts were easily tuned by employing different types of zinc precursors. More importantly, when the zinc species were introduced to the HBeta, the propylene yield was significantly enhanced, whereas the yields of ethylene and C2–C4alkanes were remarkably suppressed. For the catalyst prepared by using the ZnCl2precursor, a higher propylene yield of up to 43.4% for Zn/HBeta-C was achieved as a result of the moderate amount and strength distribution of acid sites. The average coking rate of the used Zn/HBeta catalysts strongly depended on the amount of total acid sites, especially the strong acid sites, i.e., the higher the amount of total acid sites of the catalyst, the greater the average coking rate. For the catalyst prepared by using the ZnSO4·7H2O precursor, Zn/HBeta-S exhibited a better stability even after depositing more coke, which was due to the higher amount of strong acid sites.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Kunming Sun,Tinghui Deng,Jing Sun,Shuo Gao,Huwei Liu,Shuyun Zhu,Xian-En Zhao
Artemisinin (ART) is a type of frontline drug to treat drug-resistant falciparum malaria. Simple, accurate and selective determination of ART is significant to monitor its clinical pharmaceutical efficacy. Herein, a new ratiometric fluorescence method has been designed for the determination of ART with Zn-MOF as fluorescence reference and hemin as catalyst, respectively. Zn-MOF possesses intrinsic fluorescence at 443 nm owing to 2-aminoterephthalic acid ligand. When o -phenylenediamine (OPD) is mixed with hemin, a weak fluorescent signal at 570 nm ascribed to oxidized product of OPD (oxOPD) is observed. In the presence of ART, hemin can catalyze ART to break its peroxide bridge and release a large number of reactive oxygen species, which effectively oxidize OPD into luminescent oxOPD. Therefore, the fluorescence at 570 nm is enhanced significantly while the fluorescence of Zn-MOF remains basically unchanged. Thus, a ratiometric fluorescence sensing platform has been constructed for the detection of ART. This method exhibits wider linear range (0.15 μM-150 μM) with detection limit of 50 nM. This novel and selective method has been used to detect ART in compound naphthoquinone phosphate tablets.
研究领域:
药学
·
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYHEDRON
·
2024
·
IF 2.4
Rong Chen,Yuting Zhu,Na Song,Huixue Fang,Yan Ma,Lengfeng Wu,Shengjun Liu,Kui Zhang
Photosensitizers are highly desirable due to their many applications. Photosensitizers play an important role in photocatalysis. However, conventional photosensitizers are not conducive to recycling. The proximity of the photosensitizing dye to the corresponding carrier is important in dye sensitization and in enhancing photocatalytic performance; however, most photosensitizers exhibit weak interactions with carriers. The transition of the photosensitizer from the molecule to the crystalline state enhances the stability of the photocatalyst and improves photocatalytic performance. In this study, MOF (metal–organic framework) @Zn-TCPP(M) hybrids were synthesized. The H 2 yield of NM@Zn-T(Cu)-3 was 620.56 µmol g −1 (4 h), which was 10.64 times and 3.80 times greater than Zn-TCPP(Cu) and NH 2 -MIL-125, respectively. The results revealed that the modification of the MOF with Zn-TCPP(M) altered the charge-transfer capability, and thus improved photocatalytic activity. This study reports a novel strategy to enhance the photocatalytic performance of Metal-Organic Framework using Zn-TCPP(M).
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
·
2021
·Vol. 146
·期 22
·6883-6892
·
IF 4.616
Jing Chen,Fanghong Xu,Qian Zhang,Shuying Li,Xiaoquan Lu
A fluorescent probe based on single metal–organic framework material without additional fluorophores and active sites can significantly improve the stability of the probe for detection, and has very important application value in environmental analysis and detection. In this paper, a simple and rapid fluorescence detection method was established with Zn-MOF, which realized the highly sensitive detection of tetracycline antibiotics and NH4+ in water. The prepared Zn-MOF has abundant pores and can exist stably in water. When tetracycline antibiotics are present in Zn-MOF aqueous solution, based on the unique coordination ability between Zn and N, tetracycline antibiotics rich in N will be adsorbed into the pore canals of MOF, and aggregation-induced luminescence will occur. The original non-fluorescent Zn-MOF will immediately produce yellow fluorescence, realizing the detection of tetracycline antibiotics in water, with the limit of detection reaching 0.017 μM in a linear range of 0.02–13 μM. Zn-MOF is further used for the detection of tetracycline antibiotics in actual samples of milk and honey. Oxytetracycline (OTC) with the best fluorescence response of tetracycline antibiotics was coated on Zn-MOF to synthesize OTC@Zn-MOF fluorescent probe. NH4+ will replace the original ligand of Zn-MOF, which will disintegrate MOF and release OTC, resulting in a fluorescence decrease. Therefore, NH4+ can be detected with low limit of detection (0.038 μM) in a linear range of 0 to 3 mM. The probe is expected to be able to detect ammonia in the environment.
研究领域:
环境分析
·
化学传感
·
药物检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Guochao Wan,Wenhao Sun,Lei Liu,Changming Mao,Zhonghua Zhang,Xiaosong Guo,Guicun Li
Reducing the free radicals associated with electrochemical reactions and the activity of H2O is an effective measure to inhibit side reactions and improve stability for rechargeable aqueous Zn-ion batteries. Herein, methylsulfonylmethane (MSM), a popular dietary supplement for humans, is used as an innoxious and low-cost additive to scavenge free radicals and optimize the coordination condition for aqueous ZnSO4 electrolyte. Profiting from the double effects of MSM, the Zn∥Ti asymmetric cells exhibit excellent stability and display a high Coulombic efficiency (CE) of 99.5% in the aqueous MSM/ZnSO4 electrolyte for 1000 h, and the Zn∥Zn cells achieve a long cycle life of over 2000 h. In addition, MSM can effectively suppress the dissolution of an ammonium vanadate (NVO) cathode. The positive role of MSM is further exhibited in the Zn∥NVO and Zn∥PANI full cells, exhibiting outstanding charge/discharge performance and capacity retention. This work provides a type of innoxious additive for an aqueous electrolyte for aqueous rechargeable zinc-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 41
·16138-16147
·
IF 3.069
Yu Guo,Qing-Ying Yu,Ji Zhang,Hui-Zhen Yang,Zheng Huang,Xiao-Qi Yu
The unique properties of 1,4,7,10-tetraazacyclododecane (cyclen) make it not only a suitable polyamine headgroup in cationic lipids for gene delivery, but also a good host molecule for metal coordination. In this study, a series of cyclen-based lipids and their Zn(II)-complexes were synthesized to study the effect of Zn-coordination on the gene transfection. Both the Zn-free and Zn-containing lipids could form nano-sized particles with suitable positive potential to condense and protect DNA from degradation by DNase. More importantly, Zn coordination could significantly reduce the cytotoxicity of the liposomes. Meanwhile, the gene transfection efficiency of the cyclen-based lipids could also be distinctly improved by the Zn-coordination. Mechanistic studies reveal that the Zn-free and Zn-containing liposomes showed similar cellular uptake properties. However, confocal microscopy shows that Zn-containing liposomes may induce more efficient endosomal escape than the Zn-free counterpart, which could be attributed to their much higher pH buffering capacity. This study presents an efficient strategy to enhance the gene transfection efficiency and biocompatibility of cyclen-based cationic lipids.
研究领域:
药学
·
分子生物学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 27
·10218-10225
·
IF 5.7
Tingfeng Ma,Bin Li,Yongkang Zhu,Senwei Wu,Xiujian Zhao,Xinhong Chu,Shouqin Tian
Tungsten oxides have attracted much attention and research in the field of photochromic smart windows, but their application is limited by their slow light response and poor reversibility. In order to overcome the limitations, Zn2+-doped W18O49 nanoparticles were prepared using a facile hydrothermal method and they exhibited good photochromic performance with a quick coloring rate under UV irradiation because more oxygen vacancies in the crystal lattice caused by Zn doping could facilitate the reduction of W6+ to W5+, which was confirmed from XRD and XPS results. In addition, the Zn-doped W18O49 nanoparticle-based films showed excellent photochromic properties with a high visible transmittance (Tlum) of 85.33%, a large solar modulation efficiency (ΔTsol) of 47.18% and a fast photochromic speed (3 min) as well as good cycling stability. These properties are better than those reported in most previous works. Therefore, this work can provide a promising photochromic material with high performance for smart windows.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Ming Yang,Qianhui Bai
Water pollution has become a great problem and aroused worldwide concern. As a new class of materials, metal-organic frameworks (MOFs) exhibit significant potential for wastewater treatment due to their high surface area, porosity, stability and tunability. In this work, flower-like hierarchical Ni-Zn MOF microspheres were synthesized via a facile solvothermal method. The mole ratio of Ni to Zn had a great influence on the morphology and microstructure of the final products. With the increase mole ratio of Zn to Ni, the morphology of MOFs gradually changed from spheroidal structure to rod-like structure. Using the Congo red (CR) experiment to evaluate the adsorption performance, Ni-Zn MOF displayed superior adsorption capacity towards CR (460.90 mg g −1 ), compared with Ni MOF (276.70 mg g −1 ) and Zn MOF (132.20 mg g −1 ). Besides the tuned morphology and pore structure, electron transferring from Zn species to Ni species would also favor the physicochemical adsorption of Ni-Zn MOF towards CR.
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 ENVIRONMENTAL MANAGEMENT
·
2023
·
IF 8.7
Dongyang Liu,Hanzhi Wang,Yue Teng,Qirui Wu,Chunming Tang,Xinxin Gao,Chaoqi Chen,Liandong Zhu
With the development of livestock industry , contaminants such as divalent zinc ions (Zn (Ⅱ)) and estrone are often simultaneously detected in livestock wastewater. Nevertheless, the combined toxicity of these two pollutants on microalgae is still unclear. Moreover, microalgae have the potential for biosorption and bioaccumulation of heavy metals and organic compounds. Thus, this study investigated the joint effects of Zn (Ⅱ) and estrone on microalgae Chlorella sorokiniana , in terms of growth, photosynthetic activity and biomolecules , as well as pollutants removal by algae. Interestingly, a low Zn (Ⅱ) concentration promoted C . sorokiniana growth and photosynthetic activity, while the high concentration experienced inhibition. As the increase of estrone concentration, chlorophyll a content increased continuously to resist the environmental stress. Concurrently, the secretion of extracellular polysaccharides and proteins by algae increased with exposure to Zn (Ⅱ) and estrone, reducing toxicity of pollutants to microalgae. Reactive oxygen species and superoxide dismutase activity increased as the increase of pollutant concentration after 96 h cultivation, but high pollutant concentrations resulted in damage of cells, as proved by increased MDA content. Additionally, C. sorokiniana displayed remarkable removal efficiency for Zn (Ⅱ) and estrone, reaching up to 86.14% and 84.96% respectively. The study provides insights into the biochemical responses of microalgae to pollutants and highlights the potential of microalgae in pollutants removal.
研究领域:
环境科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Ce Qiu,Xiaohui Zhu,Liang Xue,Mingzhu Ni,Yang Zhao,Bo Liu,Hui Xia
Adding Mn 2+ in aqueous electrolyte is a well adopted approach to improve cycle performance for Zn/MnO 2 batteries. The function of Mn 2+ additive in aqueous electrolyte, however, is not well understood, which could affect revealing the real performance of the MnO 2 cathode itself. In this work, a battery system with Zn anode and birnessite MnO 2 cathode is constructed and systematically investigated by using MnSO 4 additive in the electrolyte with different concentrations. The function of Mn 2+ in the electrolyte, the structural evolution of the electrode, the reaction mechanism, and the cause for capacity fading are comprehensively investigated in this system. It is found that Mn 2+ can be continuously electro-oxidized at the cathode and form ε-MnO 2 when the charge voltage is above 1.7 V during cycling, leading to successive capacity increase up to hundreds of cycles. The capacity increase, however, stops after certain cycle numbers, and is followed by fast capacity fading, which is correlated to the competition between ε-MnO 2 formation and phase transition from birnessite to spinel ZnMn 2 O 4 . It is suggested that addition of Mn 2+ in the electrolyte cannot stabilize the MnO 2 cathode and the improved cycle performance is achieved at the expense of consuming the Mn 2+ in the electrolyte.
研究领域:
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Xukai Li,Weirui Chen,Dongpo Liu,Gaozu Liao,Jing Wang,Yiming Tang,Laisheng Li
Due to its low interfacial electron migration ability and highly hydrophilic, Fe-MCM-41 (FeM) had poor activity and stability during catalytic ozonation . To this end, the secondary metal Zn and Si-F group were introduced into the framework of FeM to create surface potential difference and hydrophobic sites. Comparative characterizations showed that there existed rich acid sites with great potential difference on F-Fe-Zn-MCM-41 (FFeZnM). Additionally, because of the existence of hydrophobic and electron-withdrawing Si-F unit, the electron migration ability, hydrophobicity and acidity of FFeZnM were enhanced. The greater O 3 mass transfer was induced by Si-F group and O 3 was directly activated at Fe and Zn Lewis acid sites into •OH, •O 2 - and 1 O 2 . With •OH acting as main species, FFeZnM/O 3 achieved the superior IBP removal (93.4%, 30 min) and TOC removal (46.6%, 120 min) over those of sole O 3 and F-FeM/O 3 processes, respectively. HCO 3 - , Cl - , NO 3 - and SO 4 2- hindered IBP degradation by FFeZnM/O 3 , but high concentration humic acid (HA) exhibited promotion by forming HA-IBP complex. IBP degradation by FFeZnM/O 3 was enhanced with tap water , river water, and effluent from the secondary sedimentation tank of the sewage plant acting as medium. This study proposed an innovative approach to catalyst design for catalytic ozonation.
研究领域:
环境科学
·
材料科学
✓ 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）