ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2020
·
IF 7.864
Yang Chen,Yadan Du,Puxu Liu,Jiangfeng Yang,Libo Li,Jinping Li
NH3 is the most important gaseous alkaline pollutant, which when accumulated at high concentrations can have a serious impact on animal and human health. More importantly, NH3 emissions will react with acidic pollutant gases to form particulate matter (PM2.5) in the atmosphere, which also poses a huge threat to human activities. The use of adsorbents for NH3 removal from emission sources or air is an urgent issue. However, there are difficulties in the compatibility between high adsorption capacity and recyclability for most conventional adsorbents. In this work, a structural transformation strategy using metal–organic frameworks (MOFs) is proposed for large-scale and recyclable NH3 adsorption. A series of M(BDC) (M = Cu, Zn, Cd) materials can transform into one-dimensional M(BDC)(NH3)2 after NH3 adsorption, resulting in repeatable adsorption capacities of 17.2, 14.1, and 7.4 mmol/g, respectively. These MOFs can be completely regenerated at 250 °C for 80 min with no adsorption capacity loss. Besides, breakthrough and cycle tests indicate that Cu(BDC) and Zn(BDC) show good performance in the removal of low concentrations of NH3 from the air. Overall, combining the advantages of high adsorption capacity and recyclability due to the reversible structural transformation, Cu(BDC) and Zn(BDC) can be employed as ideal adsorbent candidates for NH3 removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Ting Chen,Yuanhong Chen,Chunxian Guo,Zhixiang Xie,Youpeng Li,Wenkui Wu,Yu Gu
Synthesis of nontoxic quantum dots (QDs) with excellent optical properties in aqueous phase to replace organic dyes with photobleaching drawbacks used in bioimaging has become a research priority. Herein, water-soluble Ag-In-Zn-S (AIZS) QDs were prepared by microwave-assisted hydrothermal method at 110 °C for 40 min. The luminescence peak of AIZS QDs was varied from 684.5 nm to 576.2 nm when the Ag/In molar ratio was changed in the range of 1/2–1/10. A clear blue-shift of PL peak from 616.8 nm to 551.5 nm was observed with increasing Zn 2+ element with the Ag/Zn molar ratio in the range of 1/0–1/14, indicating that the increase of Zn 2+ content caused the increase of band gap. The AIZS QDs exhibit the highest photoluminescent quantum yield (PLQY) of 20.67 % with the molar ratio of Ag/In/Zn=1/6/2, and fluorescence lifetime upped to 294.69 ns. Finally, human hepatocellular carcinomas (HepG2) cells and Hela cells were incubated with AIZS QDs solution at different concentrations and were found to have a high survival rate. Furthermore, HepG2 cells emitted bright yellow light when stimulated upon UV excitation, indicating that AIZS QDs can be applied in bioimaging field.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Zhuo Sun,Juan Lu,Xin Zhang,Xiangyu Shan,Qian Wu,Chao Li,Huiling Li,Shuning Yang,Li Tian
In this work, Zn-MOF electrospun nanofibres (Zn-MOF NFs), CdTe and Au@Pt-rGo were applied to Ru(bpy) 3 2+ /tri- n -propylamine electrochemiluminescence (ECL) system. And a novel ECL sensor for the determination of fenpropathrin was constructed for the first time. Due to the large surface area and pores, Zn-MOF NFs can both carry CdTe and Au@Pt-rGo and promote luminescence by facilitating electron transfer and reducing electron transport paths. CdTe participated in the luminescence reaction and improved the system’s sensitivity together with Ru(bpy) 3 2+ . Au@Pt-rGo can promote electron transport in the system. Under the synergistic effect of the three, the ECL sensor had achieved satisfactory results in weak alkaline solution. The constructed ECL sensor can detect fenpropathrin in the range of 4 × 10 −11 –4 × 10 −6 M, and the detection limit was 1.33 × 10 −11 M (S/N = 3). It can be used to detect fenpropathrin in juice samples, which provided a new idea for determining fenpropathrin.
研究领域:
分析化学
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环境科学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
Journal of Chemistry
·
2019
·
IF 1.727
Dekui Bai,Xiaofang Wang,Dongxia Huo,Quanhong Ying,Ni Wang,Baixue Xia
Cu/Zn/Al-hydrotalcite-like compound (Cu/Zn/Al-HTlc) was prepared by the coprecipitation method with ZnII, AlIII cations solution, and electroplating wastewater containing CuII cation. The preparation conditions of Cu/Zn/Al-HTlc were optimized. The metal ion pollutants removal effect and iodide maximum adsorption capacity of Cu/Zn/Al-HTlc were also studied. The physicochemical properties of the Cu/Zn/Al-HTlc were analyzed by X-ray diffraction, FTIR, SEM, N2 adsorption-desorption isotherms, and TG-DTG. The results showed that Cu/Zn/Al-HTlc should be prepared with the ZnII-AlIII molar ratio of 1.5 : 1, pH = 11, and aged at room temperature for 0.5 d. Structural analysis showed that the Cu/Zn/Al-HTlc was a layered compound. CuII and other metal ion pollutants can also be successfully removed from electroplating wastewater in the preparation process of Cu/Zn/Al-HTlc and reached Chinese National Emission Standard (GB 21900-2008). The optimal adsorption condition of calcinated Cu/Zn/Al-HTlc for iodide was as follows: the solid-liquid ratio was 1 : 250, the pH value was 8, and the adsorption process was carried out at 25°C for 30 min. The saturated adsorption capacity reached 1000 mg·g−1 at the optimal adsorption condition. The main reason for this high-saturated adsorption capacity of Cu/Zn/Al-HTlc was that iodide penetrated into the layered structure of Cu/Zn/Al-HTlc by physical adsorption and CuII undergoes a specific redox reaction, producing CuI. Hence, coprecipitation synthetic technology and prepared Cu/Zn/Al-HTlc could be potentially used for electroplating wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Kaixuan Kuang,Jiahui Wang,Xiuzhen Zheng,Jingbiao Ge,Huihui Xue,Sujuan Zhang,Sugang Meng,Shifu Chen
To improve the efficiency of photocatalytic H 2 production, many researches are widely studied on the microstructure regulation of cocatalysts, including morphology design, atomic doping, and heterostructures composite. Derived from Ni-Co MOF materials, hollow NiCoP (NCP) microspheres as electron acceptor can effectively promote the separation of photogenerated charge carriers (PCCs). With Zn 0.3 Cd 0.7 S (ZCS) nanoparticles supporting on the surface of NCP, a series of NiCoP/Zn 0.3 Cd 0.7 S (NCP/ZCS) composites were successfully prepared by electrostatic self-assembly and characterized by many tests. Under visible light illumination, 10 % NCP/ZCS catalyst had the best H 2 production rate (21.50 mmol g −1 h −1 ) with benzyl alcohol (PhCH 2 OH) as the sacrificial agent, about 45.74 times that of pure ZCS. Its apparent quantum yield (AQY) reached highest at 400 nm, which was about 18.94 %. Through a combination of photoelectric, PL and UPS experiments, a Z-scheme transfer model was proposed in the NCP/ZCS composite for highly efficient photocatalytic H 2 generation. For ZCS, the hollow structure of the NCP cocatalyst can improve the light utilization rate, increase the reaction active site and accelerate the electron transmission rate. This structural design of cocatalyst not only provides a new idea to understand the reaction process of photocatalysis, but also opens up new directions for the development of simple, efficient and low-cost cocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·
IF 3.7
Kang Liu,Shuang Luo,Jianying Liang,Pengfei Xu,Jinglv Feng,Shumin Qin,Jien Li
Graphical A hydrothermal process is used for co-doping Mo and Zn into tunnel-structured MnO 2 (MZMO), enhancing its ion diffusion kinetics and electrical conductivity by introducing impurity energy levels and generating oxygen vacancies. This co-doping strategy also stabilizes the MnO 2 framework, enabling the MZMO cathode to achieve exceptional capacity, highly reversible H + /Zn 2+ co-intercalation, and prolonged cycle life. To address the rising demand for eco-friendly and efficient energy storage devices, rechargeable aqueous zinc ion batteries (AZIBs) are emerging as a promising candidate for large-scale energy storage. α-MnO 2 has attracted extensive attention for its open channels and exceptional Zn 2+ storage capacity. However, the electrochemical performance of α-MnO 2 is significantly hindered by severe structural collapse and sluggish reaction kinetics. Herein, we propose a simple hydrothermal approach for co-doping Mo and Zn into tunnel-structured MnO 2 (MZMO). The ion diffusion kinetics of MZMO are optimized due to ameliorated electrical conductivity by doped cations and introduced oxygen vacancies within the MnO 2 lattice. Moreover, Mo and Zn co-doping stabilizes the MnO 2 framework, significantly enhancing its electrochemical performance during prolonged cycling. Charge storage mechanism analysis further validates the extraordinary stability of the MZMO phase structure during the Zn 2+ /H + co-intercalation and deintercalation. The MZMO cathode demonstrates rapid and reversible Zn 2+ storage, with a high capacity of 395 mAh g −1 at 0.2 A g −1 , and the capacity remains at 136 mAh g −1 after 1000 cycles at 2 A g −1 . This study demonstrates Mo and Zn co-doping is an effective strategy to enhance the electrochemical performance of MnO 2 , offering valuable insights for developing other promising cathodes for AZIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2016
·
IF 2.357
Lindong Li,Xingliang Chen,Shuhua Qi
The composite of hollow glass microspheres (HMG) coated by Ni 0.7 Zn 0.3 Fe 2 O 4 particles was fabricated via sol–gel method, and then the ternary composite (HMG/Ni 0.7 Zn 0.3 Fe 2 O 4 /PT) was synthesized by in situ polymerization. The electrical property, magnetic performance and reflection loss of the composites were measured, and the results suggest that the conductivity and the saturation magnetization (Ms) of HMG/Ni 0.7 Zn 0.3 Fe 2 O 4 /PT reach 6.87×10 −5 S/cm and 11.627 emu/g, respectively. The ternary composite has good microwave absorbing properties ( R min =−13.79 dB at 10.51 GHz) and the bandwidth less than −10 dB can reach 2.6 GHz (from 9.4 to 12.0 GHz) in X band (8.2–12.4 GHz). The morphology and chemical structure of the samples were measured through scanning electron microscopy (SEM), X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). This paper also analyzes the relationship between the reflection loss of the absorber and its thickness.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Yi Liu,Ying Chen,Yunli Liu,Zewen Chen,Huan Yang,Zhongxiao Yue,Qing Fang,Yunfei Zhi,Shaoyun Shan
Solar energy is considered as the cleanest, cheapest, and most sustainable energy source, and CO 2 cycloaddition that is drove by solar energy has unique advantages in the aspect of energy and environmental. Therefore, Zn and N co-doped porous carbon nanosheets (ZNCs), which were synthesized by a simple one-step pyrolysis method, as catalysts and photothermal material to photothermally drive cycloaddition of CO 2 . The prepared ZNCs show graphene-like layered structure, uniformly distributed Lewis acid (Zn atoms) sites and Lewis base (N atoms) sites, full spectrum absorption and high photothermal conversion efficiency. More importantly, ZNCs have a higher catalytic efficiency than traditional heating methods because it can be quickly in-situ heated by light, hence the yield of cyclic carbonate reached 91.1% (0.1 MPa CO 2 , 1000 mW·cm −2 full-spectrum irradiation, 12 h). ZNCs were recycled five times without significant reduction in catalytic efficiency, and have high activity to other series of epoxides. A possible CO 2 cycloaddition mechanism which is catalyzed by ZNCs is proposed, including the step of adsorption, ring opening, insertion and cyclic carbonates formation.
研究领域:
化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2014
·Vol. 29
·期 23
·2863-2870
·
IF 1.815
Yun Zhang,Xiaomei Wu,Yanbao Fu,Weidian Shen,Xiaoqin Zeng,Wenjiang Ding
Our research aims at exploring a new oxygen reduction reaction (ORR) catalyst with effective catalytic capability, which can be used in the metal-air batteries. ORR electrocatalysts of carbon black and carbon aerogel supported Pt-based nanoparticles were synthesized by a chemical impregnation reduction method. The electrochemical measurement consisted of cyclic voltammetry (CV) and line scan of scanning electrochemical microscopy (SECM) conducted in alkaline medium as well as the single-cell tests. All the tests indicate that the Pt–Zn/carbon aerogel (Pt–Zn/CA) catalyst, with the specific discharge capacity reaching 1349.5 mA h g−1, exhibits the best catalytic performance among all the tested catalysts. The doping of Zn forms Pt-rich surface, creates more d-band vacancies, and reduces the leaching problem; the use of carbon aerogels brings larger specific surface area. These aspects have all improved the catalytic activity per unit mass.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yuxi Yang
In this work, Ni-Zn-doped porous carbon materials (Ni@C) with regular dodecahedral morphologies were synthesized by calcination of Ni-doped ZIF-8 as a template, and applied in electrochemical sensing and quantitative electrochemical sensors to detect Hydroquinone (HQ), The uniformly dispersed Ni in Ni@C serves as the catalytically active material, and the synergistic effect of elemental Zn and porous carbon improves the electron transport efficiency of the material. The developed Ni@C electrochemical sensor detected HQ alone with a sensitivity of 180 μA μM -1 cm -2 and a linear range of 9.1 nM-80 μM. The results demonstrate that the enzyme-free electrochemical sensor based on Ni@C/GCE exhibits good sensitivity, a wide linear range and excellent selectivity. At the same time, the problem of the general conductivity of metal-organic framework (MOF) materials is solved, which provides a new idea for the application of such new materials in the direction of electrochemistry.
研究领域:
分析化学
·
材料科学
·
电化学
·
生物医学工程
·
环境监测
✓ 已验证
DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2024
·
IF 2.5
Xiaogang Yu,Md Mostafezur Rahman,Renpeng Yang,Chengwei Wu,Abdelhakim Bouyahya,Wei Zhang
Magnetic induction hyperthermia with self-regulated temperature is an advanced technology capable of automatically regulating hyperthermia temperature through a magnetic phase transition, which has a promising application prospect. This paper investigated the effects of Al 3+ doping on the magnetic properties and Curie temperature of Zn-Mn ferrite. The specific saturation magnetization and Curie temperatures of Zn 0.5 Mn 0.5 Al x Fe 2-x O 4 (0 ≤ x ≤ 0.6) nanoparticles decrease linearly with increment of Al 3+ content. The magnetic heating experiments exhibit that the synthesized nanoparticles can raise the temperature of agar phantom to above 42 °C and self-regulate the temperature below their Curie temperatures, demonstrating their potential for self-regulated temperature hyperthermia. Additionally, in vitro cell experiments confirm the nanoparticles’ good biocompatibility.
研究领域:
材料科学
·
生物医学工程
·
纳米医学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Xiao-shan Miao,Jia-wei Sun,Fu Ma,Hong-jian Zhao,Yan Zhou,Zheng-bing Han,Xu Li
Zn–SnO 2 /BiOBr, a novel heterojunction material for photocatalytic dye degradation, was synthesized successfully using the one-step hydrothermal method. The formation of the heterojunction enhanced the vacancy coupling effect. The photocatalytic experiment results showed that the degradation rate of Rhodamine B (RhB) due to 0.3Zn–SnO 2 /BiOBr (the heterojunction formed when the molar ratio of Zn–SnO 2 to BiOBr was 0.3) within 15 min was 9.27 and 476.9 times that of BiOBr and Zn–SnO 2 , respectively. Additionally, the degradation rate of basic fuchsin (BF) due to 0.3Zn–SnO 2 /BiOBr was 4.2 and 21.9 times that of BiOBr and Zn–SnO 2 , respectively. The significantly improved photocatalytic performance was because many oxygen vacancies in Zn–SnO 2 /BiOBr collaborated with the type-II heterojunction to promote a narrow bandgap value efficiently, increasing the photogenerated electrons (e – ) and hole (h + ), an increased charge separation efficiency under visible light, and favored the photocatalytic degradation of dyes.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）