LANGMUIR
·
2012
·
IF 4.186
Dong Wang,Panfeng Long,Renhao Dong,Jingcheng Hao
A new ternary system of tetradecyldimethylamine oxide (C14DMAO)/4-phenylazo benzoic acid (AzoH)/H2O was first investigated, and it was found that the self-assembly can be regulated via temperature and β-cyclodextrin (β-CD) recognition. In the temperature regulated self-assembly, the self-assembled phase structural transition between wormlike micelles and multilamellar vesicles (onions) were determined by cryogenic-transmission electron microscopy (cryo-TEM) images and 2H nuclear magnetic resonance (2H NMR) spectra. The phase structural transition temperatures (PSTT) controlled by changing the amount of AzoH were measured by differential scanning calorimetry analysis. The self-assembled phase structural transition mechanism was discussed. It is argued that the self-assembled phase structural transition is the synergetic balance among the hydrophilic headgroup, steric structures of the hydrophobic chain, and membrane charge. β-CD molecules were used as controlling hands to modulate the phase structural transition of self-assembly of the C14DMAO/AzoH/H2O system in solution via snatching C14DMAO molecules. The phase structural transitions from the threadlike micellar phase to the lamellar phase and from the lamellar phase to the vesicular phase can each be controlled because of the β-CD molecular recognition. The phase structural transitions were confirmed by cryo-TEM observations and 2H NMR measurements. The rheological properties were also investigated to display the importance in the phase structural transition. It was found that the dye molecule, AzoH, is harder to enclose by β-CD than by C14DMAO because of the lower complex stability constant (i.e., KC14DMAO@β-CD ≫ KAzoH@β-CD. Therefore, the phase structural transition is mainly controlled by the inclusion of C14DMAO into the hydrophobic cavity of β-CD molecules. The phase structural transition controlled via temperature and β-CD may find potential applications such as in actuators, shape memories, drug delivery systems, and drag-reducing fluids, etc.
研究领域:
化学
·
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Xuan Zhan,Yikun Wang,Chenyang Sun,Yuchen Fang,Lihua Huang,Zakir Ullah,Qiang Chen,Xuejing Wang,Zheng Xing,Gangfeng Ouyang
Photocatalysis based on chromophores such as porphyrin, coumarin, anthraquinone, and pyrene is a promising technology to achieve green synthesis of various high-value chemicals, but the robust and non-covalent immobilization of chromophores onto light-inert scaffolds for industrialization-oriented heterogeneous photocatalysis remains challenging. In this work, a simple and universal strategy is presented for preparing highly efficient and recyclable heterogeneous photocatalysts from chromophores, which is achieved via biotinylation of chromophore molecules and subsequent supramolecular binding of chromophore-biotin dyads to streptavidin-decorated magnetic beads. As an example, commercial magnetic beads modified by 5,10,15,20-tetrakis(4-aminophenyl) porphyrin not only possessed remarkable photocatalytic activities for the oxidative coupling of benzylamine derivatives and the oxidation of thioanisole derivatives with highest product yields of beyond 95% and turnover numbers approaching 10000, driven by photogenerated reactive oxygen species but also demonstrated impressive chemical stability and efficient recyclability via simple magnetic separation during 10 successive test cycles. The findings revealed in this work pave the way for advancing green synthesis of valuable organic compounds in the pharmaceutical industry, agricultural sector, etc., with rationally designed heterogeneous photocatalytic systems.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2012
·
IF 3.461
Yan Dong,Huiming Lin,Fengyu Qu
The magnetic mesoporous carbon materials have been synthesized by chemical activation followed by reduction of Fe(NO 3 ) 3 under N 2 condition. All these materials possess dual-pore mesopore texture (2.8–2.9 nm and 3.5–4.1 nm), large surface areas (975–1321 m 2 /g), and high pore volumes (0.85–1.08 cm 3 /g). The adsorption capability and behavior of four dyes, methylthionine chloride (MC), methyl orange (MO), rhodamine B (RB), and gongo red (GR), were carried out on these magnetic bimodal mesoporous carbon materials. All the materials show the well adsorption capacity of the four dyes (highest reach 768 mg/g). After investigating the adsorption isotherms of these dyes, they all fit the typical Langmuir adsorption model. And the adsorption amount is mainly affected by BET surface area and the structure/size matching between adsorbent and adsorbate. With the highest BET surface area and 1D short mesopore structure, the sample shows the larger adsorbing capacity for the smaller molecular dyes (MC, MO). Moreover, the 1D long mesopore is benefit to absorb the dye with 1D long chain structural molecule (GR), while the storage capacity of RB (2D molecular structure) on 1D mesoporous adsorbent is the lowest.
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
Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 25
·7391-7398
·
IF 0
Yan Dong,Huiming Lin,Qumei Jin,Lei Li,Dan Wang,Dan Zhou,Fengyu Qu
The mesoporous carbon fibers, of about 400 to 900 nm in diameter, have been synthesized by an electrospinning method with PF resin and PVP as carbon sources and triblock copolymer Pluronic P123 and tetraethyl orthosilicate (TEOS) as mesoporous templates. All materials have large surface areas (1215–2092 m2 g−1), high pore volumes (0.66–1.37 cm3 g−1), and mesoporous structure (with pore sizes of 2.31–2.64, 3.79–3.86, and 5.68–5.70 nm). The adsorption capability of four dyes, methylthionine chloride, methyl orange, rhodamine B, and congo red have been investigated. All the adsorption isotherms fit the typical Langmuir adsorption model well. The mesoporous carbon fibers show high adsorption capacity for these bulky dye molecules. The adsorption amount is mainly determined by the surface area, pore size and the structure/size matching between adsorbent and adsorbate. With the highest BET surface area, C-3.5 (with 3.5 g TEOS) exhibits the highest adsorption amount (1044 mg g−1).
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
MATERIALS RESEARCH BULLETIN
·
2021
·
IF 4.641
Lei Zhang,Shuai Lin
The halide perovskite films suffer from poor photoelectrochemical performance in aqueous solution, inhibiting their further industrial deployment. Here, we propose a new concept of “cosensitized perovskites” that employ the cosensitization strategy to improve the photoelectrochemical properties of the prototypical CH 3 NH 3 PbI 3 film in the aqueous solution via two commercial coumarin dyes. The resulting photocurrent of the cosensitization-modified perovskite film in the aqueous solution increases by 40 % than those of the single dye-based films, and is several orders of magnitude higher than that offered by the bare perovskite film under the same conditions. The first-principles calculations reveal the detailed atomic and electronic structures of the cosensitized systems, and suggest that the improved photoelectrochemical performance is attributed to the multiple types of surface coordination when the cosensitization is available and the conjugation in the dye molecules; these effectively reduce the surface charge traps. This study serves as the first example to highlight the cosensitization strategy for the perovskite materials, and expects the cosensitization method for a wide range of perovskite-based applications, including solar cells, photodetectors, light-emitting diodes, photocatalysts, and water-splitting systems.
研究领域:
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
Membranes
·
2022
·Vol. 12
·期 10
·938
·
IF 4.562
Haoyu Wang,Zhiyun Han,Yanjuan Liu,Maojin Zheng,Zhenbang Liu,Wei Wang,Yingying Fan,Dongxue Han,Li Niu
Developing efficient and recyclable membranes for water contaminant removal still remains a challenge in terms of practical applications. Herein, a recyclable membrane constituted of polyacrylonitrile-graphene and oxide-polydopamine was fabricated and demonstrated efficient adsorption capacities with respect to heavy metal ions (62.9 mg g−1of Cu2+ion, CuSO450 mg L−1) and organic dye molecules (306.7 mg g−1of methylene blue and 339.6 mg g−1of eriochrome black T, MB/EBT 50 mg L−1). The polyacrylonitrile fibers provide the skeleton of the membrane, while the graphene oxide and polydopamine endow the membrane with hydrophilicity, which is favorable for the adsorption of pollutants in water. Benefitting from the protonation and deprotonation effects of graphene oxide and polydopamine, the obtained membrane demonstrated promotion of the selective adsorption or desorption of pollutant molecules. This guarantees that the adsorbed pollutant molecules can be desorbed promptly from the membrane through simple pH adjustment, ensuring the reusability of the membrane. After ten adsorption–desorption cycles, the membrane could still maintain a desirable adsorption capacity. In addition, compared with other, similar membranes reported, this composite membrane displays the highest mechanical stability. This work puts forward an alternative strategy for recyclable membrane design and expects to promote the utilization of membrane techniques in practical wastewater treatment.Keywords:wastewater treatment;pH-dependent;membrane
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
Engineering Research Express
·
2024
·Vol. 6
·期 2
·025015
·
IF 1.5
Wenlong Deng,Linyu Mei,Yue Niu,Zicheng Zhang,Yunpeng Shao
Metal–organic framework (MOF) materials have been increasingly used owing to their high porosity, chemical stability, and semiconducting properties. With the help of MOF materials, MOF-based SERS substrates can exhibit high sensitivity. Herein, we proposed a flower-like Ag nanoparticles (AgNFs)/metal–organic framework (MOF)/ carbon fiber cloth (CFC) substrate-based surface-enhanced Raman scattering (SERS) sensor for the high-sensitive detection of dye molecules. MOF is used as a signal amplifier to accelerate the approach of dye molecules near AgNFs on the MOF surface and anchor AgNFs on the substrate surface. The detection occurred on the AgNFs/MOF/CFC SERS substrate, providing an enhancement factor (EF) of 5.53 × 107. Benefitting from the signal amplification function of AgNFs/MOF/CFC and the superiority of SERS, this sensor represented high sensitivity performance and a wide detection range. Importantly, the combination of Co elements with silver in the AgNFs/MOF/CFC composite substrate enhances the resistance of Ag to oxidation by atmospheric moisture resulting in excellent stability (the substrate maintained good SERS activity after 45 days of exposure to air) of the SERS substrate. The basic performance of the substrate was evaluated using rhodamine 6 G (R6G). (Detection limit reached 10−12 M) The detection limit of TC was 0.1 ppm. This method provides a potential and cost-effective strategy to develop advanced SERS sensing devices to effectively monitor pollutants in environmental waters.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Chongling Wang,Na Li,Pengfei Bian,Guohua Li,Jingyue Yang,Qing Li,Tifeng Jiao
Molecular self-assembly is a technology in which different structural components spontaneously form assemblies with special functions through weak, reversible non-covalent interactions on the basis of molecular recognition . The amphiphilic and biocompatibility of polypeptides make it has natural advantage in self-assembly at the air-water interface. In this work, the self-assembled films of palmitoyl pentapeptide-4 (PP4) and dye molecules were prepared by Langmuir-Blodgett (LB) technology. It was found that the PP4/dye composite film had good acid-alkali gas response. In addition, the LB film prepared by PP4 and methyl orange (MO) showed chiral signal, which was reflected in the circular dichroism spectrum. The current research work provides new clues for the preparation of functional self-assembled films and their applications as gas sensors and chemical switches.
研究领域:
生物化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Qi Liu,Junming Qiu,Xianchang Yan,Yuemeng Fei,Yue Qiang,Qingyan Chang,Yi Wei,Xiaoliang Zhang,Wenming Tian,Shengye Jin,Ze Yu,Licheng Sun
All-inorganic CsPbIBr 2 perovskite solar cells (PSCs) have attracted considerable research attention in recent years due to their excellent thermal stability. However, their power conversion efficiencies (PCEs) are relatively low and still far below the theoretical limit. Here, we report the use of an organic dye molecule (namely VG1-C8) as a bifunctional interlayer between perovskite and the hole-transport layer in CsPbIBr 2 PSCs. Combined experimental and theoretical calculation results disclose that the multiple Lewis base sites in VG1-C8 can effectively passivate the trap states on the perovskite films. Meanwhile, the π-conjugated dye molecule significantly accelerates the hole extraction from the perovskite absorber as evidenced by the photoluminescence analysis. Consequently, the VG1-C8 treatment simultaneously boosts the photovoltage and photocurrent density values from 1.26 V and 10.80 mA cm −2 to 1.31 V and 12.44 mA cm −2 , respectively. This leads to a significant enhancement of PCE from 9.20% to 12.10% under one sun irradiation (AM 1.5G). To our knowledge, this is the record efficiency reported so far for CsPbIBr 2 PSCs. Thus, the present work demonstrates an effective interfacial passivation strategy for the development of highly efficient PSCs.
研究领域:
材料科学
·
光伏技术
·
界面工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·
IF 13.3
Rukun Cui,Jianmin Gu,Ning Wang,Yiran Wang,Xiaoyan Huang,Senlin Zhang,Li Lu,Desong Wang
Although the layered vanadium oxide-based materials have been considered to be one of the candidates for aqueous Zn-ion batteries (AZIBs), it still faces inevitable challenges of unsatisfactory capacities and sluggish kinetics because of strong electrostatic interactions between Zn-ions and structure lattice. This work addresses the strategy of pre-inserting guest materials to vanadium oxide cathode using different intercalants. To achieve this goal, the small organic dye molecules, methyl orange (MO), and methylene blue (MB) are proposed as the intercalants for vanadium oxygen hydrate (VOH). It has been demonstrated that use of these intercalants can facilitate reaction kinetics between Zn 2+ and VOH, leading to an improvement of specific capacity (293 mAh g −1 at 0.3 A g −1 for MO-VOH and 311 mAh g −1 for MB-VOH) compared to VOH, a large enhancement of excellent energy density (237.1 Wh kg −1 for MO-VOH, 232.3 Wh kg −1 for MB-VOH), and a prolong lifespan operation at 3 A g −1 . The mechanism studies suggest that the weakened electrostatic interactions between the Zn–ions and V–O lattice after intercalating organic molecules contribute to boosting the electrochemical performance of AZIBs unveiled by charge density difference and binding energy.
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
Polymers
·
2024
·Vol. 17
·期 1
·81
·
IF 4.7
Xinyi Liu,Hongji Li,Dandan Wang,Jian Lu,Yilin Wu,Wei Sun
Chrysoidin (CG) can be ingested into the human body through the skin and cause chronic toxicity, so the detection of CG levels in the environment is crucial. In this study, we synthesize F-Ag@ZIF-8/PVC molecular-imprinted membranes (FZAP-MIM) by an innovative combination of SERS detection, membrane separation, and a molecular-imprinted technique in order to perform the analysis of CG in water. The plasmonic MOF material as a SERS substrate helps to enrich the target and realize the spatial overlap of the target with the nanoparticle tip “hotspot”. To avoid the poor reproducibility of Raman signals caused by the random arrangement of the powder substrate, polyvinyl chloride (PVC) is used to provide support and protection for the powder substrate. PVC has excellent dirt immunity and chemical stability, enabling the substrate to maintain Raman performance under complex and extreme detection conditions. FAZP-MIM has outstanding sensitivity and selectivity and can quickly and accurately capture targets even in the presence of similar structural interferences. The method showed superior recoveries in spiked recovery tests of real water samples and is expected to be practically applied to the trace detection of organic dye molecules in the environment.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jianlin Chen,Xianfu Zhang,Xuepeng Liu,Botong Li,Mingyuan Han,Sike Han,Yu Han,Jiasheng Liu,Weiqing Dai,Rahim Ghadari,Songyuan Dai
In perovskite solar cells (PSCs), defects in the interface and mismatched energy levels can damage the device performance. Improving the interface quality is an effective way to achieve efficient and stable PSCs. In this work, a multifunctional dye molecule, named ThPCyAc, was designed and synthesized to be introduced in the perovskite/HTM interface. On one hand, various functional groups on the acceptor unit can act as Lewis base to reduce defect density and suppress nonradiative combinations. On the other hand, the stepwise energy-level alignment caused by ThPCyAc decreases the accumulation of interface carriers for facilitating charge extraction and transmission. Therefore, based on the ThPCyAc molecule, the devices exhibit elevated open-circuit voltage and fill factor, resulting in the best power conversion efficiency (PCE) of 23.16%, outperforming the control sample lacking the interface layer (PCE = 21.49%). Excitingly, when attempting to apply it as a self-assembled layer in inverted devices, ThPCyAc still exhibits attractive behavior. It is worth noting that these results indicate that dye molecules have great potential in developing multifunctional interface materials to obtain higher-performance PSCs.
研究领域:
材料科学
·
能源技术
✓ 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）