SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Huai Wang,Zhenyu Yuan,Jingfeng Li,Renze Zhang,Fanli Meng
Xylene is not only a carcinogenic gas, but also one of indoor pollution gases. Therefore, it is indispensable to develop a xylene gas sensor with fast response and high sensitivity. In this paper, 5 wt%rGO-Fe 2 (MoO 4 ) 3 -1 wt%Pt gas sensitive material was prepared by integrating the excellent properties of reduced graphene oxide (rGO) and noble metal Pt. In addition, the microstructure, elemental composition, phase and crystal structure of 5 wt%rGO-Fe 2 (MoO 4 ) 3 -1 wt%Pt nanocomposites were characterized. The nanostructure of Pt-modified Fe 2 (MoO 4 ) 3 nano-hollow spheres compounded on rGO was successfully prepared. The gas sensitive experiment results showed that 5 wt%rGO-Fe 2 (MoO 4 ) 3 -1 wt%Pt had better gas sensitive performance than Fe 2 (MoO 4 ) 3 (FMO), FMO-1 wt%Pt and 5 wt%rGO-FMO. At the optimum working temperature (175℃), the 5 wt%rGO-FMO-1 wt%Pt sensor had a maximum response value to xylene, and could detect 500 ppb xylene. In addition, the 5 wt%rGO-FMO-1 wt%Pt nanocomposite showed a rapid response and recovery process to xylene. Moreover, the gas sensitivity mechanism and enhancement of gas sensitivity of 5 wt%rGO-FMO-1 wt%Pt to xylene were systematically analyzed. The 5 wt%rGO-FMO-1 wt%Pt gas sensor prepared provided a new reference for the detection of xylene.
研究领域:
材料科学
·
环境科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Meng Ge,Yuanye Zhuang,Shiyang Bai,Jingjing Sun,Yingying Cheng,Xufeng Gong,Jihong Sun,Yanmin Yu
Metal-organic frameworks (MOFs) exhibit excellent structural properties, but their application in catalysis is limited due to their saturated coordination structures. Herein, catalysts containing unsaturated coordination MOF structural units loaded onto 3-aminophenol-formaldehyde resin (APF) were prepared using a stepwise assembly method. The amino groups in APF serve as anchoring groups, enabling the optimal dispersion of zinc on the surface of the carrier. The coordination saturation and the dominant surface groups can be controlled by the stepwise assembly. SEM, FT-IR, UV spectroscopy, XPS, zeta potential, and SAXS were employed to demonstrate the stepwise assembly process. The characterization results revealed that the binding strength between zinc and ligands on the APF spheres, as well as the coordination saturation state of zinc, progressively increased during the stepwise assembly process. Additionally, comprehensive evaluation of the catalytic performance was conducted via the cycloaddition reaction of CO₂ with epoxides to elucidate the feasibility and superiority of the synergistic catalysis between metal ions and functional ligands in the dual-active-center catalyst. The hybrid catalyst Zn-BDC/A-1 with the highest surface roughness but lowest Zn coordination exhibited the most efficient catalytic performance. Furthermore, the density functional theory (DFT) calculations substantiated that zinc centers on the APF surface exhibit a preferential coordination geometry involving no more than two ligand groups, and a ligand-dominated chemical environment. These findings demonstrate that the stepwise assembly maintains the coordinative unsaturation of metal centers and also optimizes the spatial availability of ligand functionalities.
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
WATER RESEARCH
·
2015
·
IF 5.528
Lu Wang,Yulei Liu,Jun Ma,Feng Zhao
Sulphamethoxazole (SMX) is extensively used in humans and livestock, but its appearance in natural water raises environmental concerns. This study demonstrated that SMX and its degradation product , 3-amino-5-methylisoxazole (3A5MI), could be effectively degraded in microbial fuel cell (MFC) reactors. Approximately 85% of 20 ppm SMX was degraded within 12 h, and this was a more rapid biodegradation rate than has been previously shown in the literature. In addition, 3A5MI, a toxic chemical that forms in the SMX degradation process, can be further mineralized. The degradation products of SMX were detected by mass spectrometry, and three speculated by-products were confirmed with chemical standards. It was observed that nitrogen atoms of SMX were progressively eliminated during the degradation process, which may relate with the degradation of SMX and 3A5MI. An antibacterial activity test showed that the biotoxicity of SMX towards Shewanella oneidensis MR-1 and Escherichia coli DH5α was greatly reduced after MFC treatment. Moreover, the ATP level of the MFC microbe was nearly threefold higher than that in open-circuit controls, which may be related to the rapid degradation of SMX in MFCs. This study can facilitate further investigations about the biodegradation of SMX.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 86
·83288-83295
·
IF 3.289
Chongmin Liu,Shuai Liu,Pingxiao Wu,Yaping Dai,Lytuong Tran,Nengwu Zhu,Chuling Guo,Ihsanullah Sohoo
Modified calcium saturated montmorillonite (Mt) was prepared at different 3-aminopropyltriethoxysilane (APTES) loadings through grafting. The as-products were characterized by XRD, FTIR and elemental analysis. Surface analysis such as acidity was examined at different H+ concentrations, showing that the release of OH− from the modified samples increased in the following order: APTES4.0CEC–Mt > APTES3.0CEC–Mt > APTES2.0CEC–Mt > APTES1.0CEC–Mt. Batch experiments were conducted and different conditions (pH, temperature and co-existing ions) were used to evaluate the adsorption capacity of the modified samples. The study developed a new way to confirm the mechanism, which indicated that ligand adsorption was the dominant sorption mechanism for Sr(II) uptake onto APTES–Mts. In general, APTES grafted montmorillonite possessed a higher efficiency of Sr(II) uptake and showed great potential for Sr(II)-rich wastewater treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
·
环境污染治理
·
吸附科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2018
·
IF 3.235
Xiaoming Chen,Mingdi Yang,Qishu Qu,Qingchun Zhao,Wensheng Zou
The synthesis and electrochromic properties of a novel regiosymmetric polymer based on 3,4-ethylenedioxythiophene, poly(2,3-bis(bromomethyl)-2,3-dihydrothieno[3,4-b][1,4]dioxine) (PEDOT(MeBr) 2 ) were highlighted. The monomer was electrochemically polymerized via repetitive cycling between 0 and 1.8 V in lithium perchlorate (LiClO 4 )–acetonitrile (ACN) electrolytic medium. The corresponding polymer was characterized by FTIR spectra, scanning electron microscopy, cyclic voltammetry , UV–Vis-NIR spectroscopy and colorimetry . It features a reversible redox process and demonstrates a stable blue-to-transmissive electrochromic behavior with very low driving potentials (−0.1 and 0.65 V). Additionally the polymer film exhibits enhanced optical contrast (60% at 669 nm) and improved coloration efficiency (183.1 cm 2 /C at 100% full contrast during bleaching process) which are higher than those of PEDOT, a relatively longer response time compared with PEDOT and reasonable redox stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 28
·2101476
·
IF 18.808
Yanlin Pan,Xiaobo Hu,Yixin Guo,Xingyu Pan,Fei Zhao,Guoen Weng,Jiahua Tao,Chunhu Zhao,Jinchun Jiang,Shaoqiang Chen,Pingxiong Yang,Junhao Chu
The vapor transport deposition of quasi-one-dimensional antimony selenosulfide (Sb 2 (S,Se) 3 ) has recently attracted increasing research interest for the inexpensive, high-throughput production of thin film photovoltaic devices. Further improvements in Sb 2 (S,Se) 3 solar cell performance urgently require the identification of processing strategies to control the orientation, however the growth mechanism of high quality absorbers is still not completely clear. Herein, a facile and general vapor transport deposition approach to precisely control the growth of large-grained dense Sb 2 (S,Se) 3 films with good crystallization and preferred orientation via the source vapor speed is utilized. It is found that defect activation energy rather than the defect concentration plays a decisive role in the Sb 2 (S,Se) 3 photovoltaic performance. Admittance spectroscopy analysis is used to obtain efficient Sb 2 (S,Se) 3 solar cells. By employing dual-source coordinations to optimize the absorber layer a power conversion efficiency of 8.17% is obtained which is the highest efficiency for Sb 2 (S,Se) 3 solar cells fabricated by vapor transport technology. This study suggests that there are other opportunities for gaining deeper a understanding of the defect physics and carrier recombination mechanisms in other highly oriented low-dimensional materials to achieve improved device performance.
研究领域:
材料科学
·
光伏技术
·
半导体薄膜
·
可再生能源
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2022
·Vol. 15
·期 11
·e202200313
·
IF 9.14
Gaoli Guo,Xiaoping Tan,Kaidi Wang,Huang Zhang
Aqueous zinc batteries have been regarded as a promising energy storage technology due to their high energy, high material abundance, low toxicity, and intrinsic safety. NASICON-type materials have been proposed as efficient cathodes for rechargeable batteries, yet they suffer from fast degradation and low Coulombic efficiency in aqueous batteries. Here we demonstrate that a rationally designed aqueous electrolyte containing a supporting Na salt and polymer additive can efficiently suppress the water activity through hydrogen bonding and facilitate the anion involvement in interfacial reactions, thus enabling the stable operation of sodium superionic conductor (NASICON) cathodes in aqueous zinc batteries. As exemplified by a Na 3 V 2 (PO 4 ) 3 cathode, the cell with zinc metal anode exhibits high cycling Coulombic efficiencies (around 99.9 % in average) with a steady output voltage and capacity retention for 300 cycles. This work addresses the potential issues with NASICON-type cathodes in aqueous zinc batteries and proposes an effective solution via fundamental interphasial chemistry to design efficient and sustainable aqueous electrolytes. Graphical Engineering electrode-electrolyte interphase : A rationally designed aqueous electrolyte with bi-cation and polymer additive is reported for aqueous zinc batteries with NASICON cathodes. As exemplified by a Na 3 V 2 (PO 4 ) 3 cathode, the full cells exhibited remarkable cycling stability and efficiency, benefiting from the well-suppressed material dissolution by electrolyte-induced interfacial engineering.
研究领域:
电化学储能
·
材料科学
·
界面化学
·
能源化学
·
无机非金属材料
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2011
·
IF 3.37
Min Sun,Bin Ding,Jianyong Yu,You-Lo Hsieh,Gang Sun
A highly sensitive coating comprising 3-mercaptopropionic acid (MPA) monolayer modified electrospun polystyrene (PS) membranes was constructed on the electrode of quartz crystal microbalance (QCM) for Cu 2+ detection. The three-dimensional fibrous PS membranes with high specific surface area (SSA) were deposited on the electrode of QCM via electrospinning. The PS membranes were sputter coated with gold, then modified with self-assembled monolayer of MPA. The PS-MPA sensors showed fast response (2–3 s) to Cu 2+ and a detection limit down to 100 ppb. Additionally, sensor sensitivity increased concurrently with both increasing PS loading and SSA on QCM electrodes . The response of the PS-MPA sensors with a PS membrane loading of 978 Hz and SSA of 43.31 m 2 /g was 40 times larger than that without membranes when exposed to 1 ppm of Cu 2+ . The sensor responses were reproducible toward Cu 2+ in the 100–5 ppm concentration range, whereas a linear response was found in the 100–1 ppm concentration range. The sensor response to Cu 2+ showed a linear relationship with an increase in pH from 2 to 7. Moreover, the sensors also exhibited chelation selectivity for other transition metal ions in the descending order Cu 2+ > Ni 2+ > Zn 2+ > Fe 2+ at concentration between 1 and 5 ppm.
研究领域:
分析化学
·
环境监测
·
材料科学
·
生物传感器
·
纳米技术
·
重金属检测
·
表面功能化
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 14
·5336-5343
·
IF 6.482
Shuyuan Li,Zhongyuan Huang,Yinguo Xiao,Chunwen Sun
Solid-state electrolytes (SSEs) are expected to replace liquid electrolytes in lithium metal batteries (LMBs) with good safety and mechanical strength. However, the existing problems of the Li1.3Al0.3Ti1.7(PO4)3 (LATP) electrolyte, like its poor contact with electrodes, serious side reactions and low ionic conductivity, limit its practical application. In this work, a chlorine (Cl)-doped LATP electrolyte showing a high ionic conductivity of 0.423 mS cm−1 was successfully synthesized. Neutron powder diffraction (NPD) results reveal that the change of the Li+ coordination environment after Cl doping has an effect on the ion diffusion path in the bulk LATP. The fabricated Li symmetric battery with the Cl-doped LATP exhibits long-term compatibility and electrochemical stability against the lithium metal anode. The enhanced performance may be attributed to the in situ formed stable solid electrolyte interphase (SEI) layer. Meanwhile, compared to the LATP electrolyte, the Li|LiFePO4 (LFP) full battery with Cl-doped LATP as an electrolyte has an improved rate performance and cycling performance. This work demonstrates that Cl doping may be an effective approach for improving the performance of the LATP electrolyte.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
BIOMACROMOLECULES
·
2022
·
IF 6.978
Zhaoyue Li,Yilin Qian,Yihuan Lai,Fu-Sheng Du,Zi-Chen Li
Poly(α-methylene ester)s are an attractive type of functional aliphatic polyesters that represent a platform for the fabrication of various biodegradable and biomedical polymers. Herein, we report the controlled ring-opening polymerization (ROP) of a seven-membered α-methylene lactone (3-methylene-1,5-dioxepan-2-one, MDXO) that was synthesized based on the Baylis–Hillman reaction. The chemoselective ROP of MDXO was catalyzed by diphenyl phosphate (DPP) at 60 °C or stannous octoate (Sn(Oct)2) at 130 °C, generating α-methylene-containing polyester (PMDXO) with a linear structure and easily tunable molar mass. The ring-opening copolymerization of MDXO with ε-caprolactone or 1,5-dioxepan-2-one was also performed under the catalysis of DPP or Sn(Oct)2 to afford copolymers with different compositions and sequence structures that are influenced by the kinds of monomers and catalysts. PMDXO is a slowly crystallizable polymer with a glass transition temperature of ca. −33 °C, and its melting temperature and enthalpy are significantly influenced by the thermal history. The thermal properties of the copolymers are dependent on their composition and sequence structure. Finally, the post-modification of PMDXO based on the thiol-Michael addition reaction was briefly explored using triethylamine as a catalyst. Given the optimized condition, PMDXO could be dually modified to afford biodegradable polyesters with different functionalities.
研究领域:
材料科学
·
高分子化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 34
·20368-20373
·
IF 3.119
Fenying Wang,Baoping Ling,Qianjin Li,Rahma Abouhany
3-Aminopropyltriethoxysilane (APTES) is a silane widely used to supply amino groups for further modifications on various materials, but it is less studied as a catalyst to catalyze sol–gel silica polymerization. Here, by using APTES as the catalyst instead of the conventional basic catalysts, a novel strategy was developed to prepare silica-based molecularly imprinted polymers (MIPs). Meanwhile, APTES was employed as the functional monomer to create imprinted nanocavities for specific recognition of target molecules. The as-synthesized MIP exhibited ultra-high recognition capability due to the elimination of the detrimental effect on the imprinting performance caused by the additional catalysts. The preparation process, specificity, pH effect, binding capacity and affinity of the MIP were studied in detail. The MIP microparticles could be packed into a solid phase extraction column for removing the target molecule in water efficiently, and the molecule could easily be enriched by 40 times. The interaction of the functional monomer and template was studied by the calculation method, giving a more clear understanding of the recognition behaviours of the imprinted polymers. The strategy could be extended not only to prepare highly specific MIPs for other small phosphoric molecules, but also for biomolecules e.g. phosphorylated peptides or proteins.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
PROCESS BIOCHEMISTRY
·
2020
·
IF 2.952
Yuan Lu,Hongqian Dai,Hanbing Shi,Lan Tang,Xingyuan Sun,Zhimin Ou
Fe 3 O 4 -Arg was selected as the optimal carrier due to its high activity recovery of immobilized cells in the preparation of Fe 3 O 4 -Arg-Cells. The optimal immobilization conditions for the preparation of Fe 3 O 4 -Arg-Cells were 30 °C, 4 h, pH 7, and 3 g dry yeast. The activity recovery of immobilized cells reached 76.8 %. For a batch reduction in a shaker in an alternating magnetic field, Fe 3 O 4 -Arg-Cells were used as a catalyst to gain ethyl ( R )-4-chloro-3-hydroxybutyrate (( R )-CHBE). For further improvement in reduction productivity, a continuous reduction in the magnetic fluidized bed reactor system (MFBRS) was completed. Under their optimal transformation conditions, it took 24 h for Fe 3 O 4 -Arg-Cells to complete the conversion of ethyl 4-chloro-3-oxobutanoate (COBE) (0.8553 mol/L) in the shaker and only 8 h for the batch reduction in an alternating magnetic field. Continuous reduction in MFBRS provided new ideas for the efficient production of ( R )-CHBE; 1.5882 mol/L (10 mL) of COBE can be completely converted in 6 h. The conversion and enantiomeric excess (e.e.) of ( R )-CHBE were 100 % and above 99.9 % respectively, in the three reaction systems mentioned above.
研究领域:
生物化学
·
合成生物学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）