International Journal of Electrochemical Science
·
2023
·
IF 1.5
Xiaoyang Liu,Xiang Sun,Hongqian Ren,Mengjie Yang,Mingling Xia,Jinghe Hou,Yi Feng,Huili Ding
The construction of continuous proton transfer channels within a proton exchange membrane is an important and challenging task for the logical design of proton exchange membranes. Herein, inspired by the mechanism of moisture transport used by plants and biological proton transfer, polyvinylimidazole-wrapped halloysite nanotubes were proposed as proton carriers and nanochannels to afford polymer electrolyte membranes with high proton conductivities. The composite membranes were constructed by mixing sulfonated poly(aryl ether sulfone) (SPES) matrix and polyvinylimidazole- wrapped halloysite nanotubes (PVI@HNTs), PVI@HNTs were prepared by distillation-precipitation polymerization among them. Through a comprehensive study on the microstructure, physical and chemical properties and proton conductivity of the composite membrane, it was found that well- dispersed PVI @HNTs improved the mechanical and thermal stability of the nanocomposite membrane. The sulfonic acid groups in the polymer matrix formed acid-base pairs with the imidazolyl groups of the PVI@HNTs, which formed proton hopping pathways and nanochannels with low energy barriers for proton transfer. In addition, similar to plant ducts, one-dimensional and large aspect ratio tubular structures provided rapid transport channels for moisture in the membrane. The combination of "vehicle mechanism" and "Grotes mechanism" has significantly improved the proton conductivity of the SPES / PVI @ HNTs-X composite membrane. Specifically,the proton conductivity of 0.198 S cm -1 at 80°C was obtained for SPES/ [email protected] membrane, which was 46% higher than that of SPES. This research could provide a general and simple strategy to design composite exchange membranes.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Jian Wang,Yan Zhang,Yang Xu,Peiping Zhang,Qian Gao,Qing Liang,Wei Zhang,Wenqing Li,Ruifeng Guo,Bo Jin,Shiding Miao
The liquid-phase oxidation benzyl alcohol using hydrogen peroxide (H2O2) as an oxidant is a promising and green strategy for manufacturing aldehydes or/and ketones. Herein palladium (Pd) nanoparticles were impregnated in lumens of halloysite nanotubes by using ionic liquid (1-(2′-hydroxylethyl)-2,3-dimethylimidazolium chloride) as directing agents. On the basis of the asymmetric scroll-like structure of halloysite and the catalytic decomposition ability of Pd toward H2O2, the prepared catalyst (Pd-IL-HNTs) exhibited powerful self-propelled movement at an average speed of 276 ± 35 μm/s in 30.0 wt % H2O2 solution. The specific interaction between nanomotors and benzyl alcohol was observed as a consequence of self-moving behavior and hydrophobic interaction introduced by ionic liquid. With the synergistic coupling of the catalytic ability and powerful movement, Pd-IL-HNTs displayed outstanding catalytic benzyl alcohol oxidation performance. Compared to other nonpropelling catalysts using lamellar clay (montmorillonite and kaolinite) as supports, such HNT-based nanomotors registered superior catalytic performance, and the TOF value of 118.1 h−1 was obtained.
研究领域:
化学工程
·
催化科学
·
纳米技术
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Xianchang Liang,Chenfeng Jia,Yuanyuan Wang,Guangmei Jiang,Wen Ma,Mingjun Cui,Wenjing Wang,Haichao Zhao
Nano-encapsulation is an efficient technology to enhance the stability and efficacy of antimicrobial agents while reducing the risks of resistance and environmental impact. In this study, novel one-dimensional halloysite nanotubes/zinc-Schiff base hybrid (CA-Zn@HNTs) was synthesized based on the ligand-confined assembly strategy. The minimum inhibitory concentration (MIC) test showed that the as-prepared CA-Zn@HNTs exhibited an MIC of 100 μg/mL against E. coli and 75 μg/mL against S. aureus . Crystal violet staining experiments showed that after treatment with CA-Zn@HNTs, the biomass of biofilms cultured for 3 days with E. coli or S. aureus ranged from 20.55 % to 23.60 %. The coating containing 5 wt% CA-Zn@HNTs achieved 99.99 % bactericidal rate within 3 h. Antibacterial adhesion experiments showed that coatings containing higher amounts of CA-Zn@HNTs were more effective in preventing biofilm formation. Furthermore, at the same loading levels, coatings aged for 7 days exhibited significantly stronger anti-bacterial adhesion effects than those aged for 3 days. This study provides an innovative strategy for developing durable, and reliable extrinsic antimicrobial materials with great potential for antimicrobial applications.
研究领域:
纳米医学
·
生物材料学
·
微生物学
·
抗菌剂开发
·
药物递送系统
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Jianhua Bian,Lili Wang,Libing Liao,Guocheng Lv
The inherent limitations of phase change materials (PCMs), namely liquidphase leakage and insufficient intrinsic light absorption, pose significant challenges to their scalable application in photothermal conversion and storage systems. This study employs polydopamine (PDA) pre-coated halloysite nanotubes (HNTs) as fundamental building blocks to construct a three-dimensional porous aerogel (PHG), which is subsequently utilized to encapsulate polyethylene glycol (PEG). A synergistic effect between the HNTs aerogel and the PDA coating leads to a collaborative enhancement of the composite PCMs (PEG/PHG). The porous structure of PHG guarantees a high encapsulation efficiency of 93.1% and a latent heat of 166.7 J g -1 , whereas the PDA coating boosts the photothermal conversion efficiency to 92.88%. The exceptional thermal management and highly efficient photothermal conversion capabilities of PEG/PHG are key enablers for its deployment in solar-driven seawater desalination.The PEG/PHG-integrated evaporator combines the dual advantages of high-efficiency solar-driven operation and sustained performance during intermittent periods. It achieves a high evaporation rate of 3.03 kg m -2 h -1 under one sun irradiation, while also maintaining a continuous evaporation performance of 1.67 kg m -2 h -1 even in the absence of light. Therefore, this research successfully integrates photothermal composite PCMs with solar-driven seawater desalination, paving the way for their application and offering new avenues for future development.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Qiang Zhao,Hanxi Jiang,Boyan Tang,Yonggang Wu,Xinwu Ba,Hailei Zhang
Preparation of a smart tool for simultaneous detection and removal of hypochlorite (ClO–) in water, a kind of serious persistent pollutant in industrial wastewater and even in tap water, is a puzzling issue in the chemosensing field. Here, halloysite nanotubes (HNTs), a natural product with excellent dispersibility in water, were employed as the scaffold to solve the urgent problem. The diaminomaleonitrile moiety, accompanying with the coumarin derivative as a chemosensor unit, was decorated on the surface of the HNTs. The diaminomaleonitrile group can be transferred into substituted imidazole formation and thereby triggers strong fluorescence emission upon ClO–, which triggers a dramatically “turn-on” fluorescence change and reduce ClO– into eco-friendly chloridion (Cl–). The detection and removal capacities show high selectivity over other commonly used ions. These results suggest that the smart nanocomposite can be used in the synchronous detection and removal of ClO– in water, which may pave a path in water quality monitoring and treatment.
研究领域:
化学传感
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Advanced Sensor Research
·
2023
·Vol. 2
·期 6
·2200086
·
IF 0
Si Wang,Bohao Liu,Xingdong Feng,Rui Pan,Yuanlingyun Cai,Renyan Zhang,Mingbo Pu,Xiaoliang Ma,Xiong Li,Huiling Tai,Xiangang Luo
High flexibility, porosity, and antibacterial activity are extremely desired for wearable health monitoring, which is beneficial to simultaneously promote wearing comfort and safety. In this study, an antibacterial nanofibers-based triboelectric generator (AN-TENG) composed of the flexible chitosan/polyvinylpyrrolidone modified with halloysite nanotubes (CTS/PVP/HNTs) nanofibers and cube-arrays structured Ecoflex film is proposed for simultaneously energy harvesting and self-powered human motion monitoring. The open-circuit voltage (280 V), short-circuit current (3.98 μA), and transferred charge (51 nC) of the CTS/PVP/HNTs nanofibers TENG at the optimal compound concentration are increased by 90.8%, 86.92%, and 96.2%, respectively, compared to the CTS/PVP nanofibers one (size: 3 cm × 3 cm, mechanical force: 10 N @1 Hz), revealing good real-time monitoring ability for human wrist, elbow, and finger motion. An antibacterial test is carried out to evaluate the antibacterial activity and the antibacterial rate of the nanofibers against Escherichia coli (ATCC 8739) and Staphylococcus aureus (ATCC 6538) based on the current national standard GB/T 31402–2015, indicating good antibacterial properties of the nanofibers. This research offers an ingenious strategy to establish an antibacterial nanofibers-based TENG for self-powered motion monitoring and energy harvesting and offers a new insight to improve the practical security of wearable electronic devices.
研究领域:
生物医学工程
·
材料科学
·
电子器件
·
可穿戴设备
✓ 已验证
DOI
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Yanan Feng,Xiaopeng Zhou,Jing-he Yang,Xiangyang Gao,Linxin Yin,Yafei Zhao,Bing Zhang
Ammonia borane (AB) has been considered as one of the most attractive chemical hydrides for on-board hydrogen storage due to its small molecular weight, high hydrogen storage density, high stability, and nontoxicity. However, the utilization of AB is still restricted by the slow kinetics of H2 release at low temperatures (<85 °C) and simultaneous generation of volatile byproducts. Herein, a new catalytic strategy involving palladium (Pd) catalysis and nanoconfinement in natural halloysite nanotubes (HNTs) for pyrolysis releasing H2 from AB is developed. The results show that AB can be encapsulated into HNTs channels and coated on the surface of HNTs with a uniform nanolayer. The synergetic catalysis of HNTs and ultrasmall Pd nanocatalysts (∼1.4 nm) and the nanoconfinement of AB immobilized on HNTs are beneficial to improving catalytic activities for pyrolysis of AB, which not only avoids emitting byproducts of ammonia, diborane, and borazine but also inhibits usual foaming and expansion of AB during the dehydrogenation process. Meanwhile, the nanoconfinement of AB immobilized on HNTs results in improved kinetics of H2 release at low temperatures of 60 °C, while no H2 evolves from the neat AB at 80 °C. The activation energy of AB@Pd/HNTs is 46 kJ mol–1, which is considerably lower than that of neat AB of 183 kJ mol–1. The results show that natural HNTs can be used as economical and efficient supports for fabrication of AB@Pd/HNTs hydrogen storage composites, and Pd/HNTs can be used as effective catalysts to improve the dehydrogenation properties of AB.
研究领域:
材料科学
·
氢能
·
纳米催化
·
化学工程
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Mengmeng Zhang,Liangliang Chang,Zehao Yu
Halloysite nanotubes/polypyrrole (HNTs/PPy) nanocomposites were fabricated by in situ polymerization of pyrrole monomer in the presence of HNTs. The structures of the composites were analyzed by X-ray diffraction, Fourier transform infrared spectra, thermogravimetric analysis and transmission electron spectroscopy. Subsequently, the capability of HNTs/PPy nanocomposites on the removal of methyl orange from aqueous solution was systematically studied. The HNTs/PPy nanocomposites showed high adsorption capacity toward methyl orange and a maximum adsorption capacity of 214.6 mg/g at 25°C was achieved. The adsorption kinetics demonstrated a rapid methyl orange uptake by HNTs/PPy and the experimental data were well fitted to the pseudo-second-order model. The Langmuir and Freundlich models were employed to describe the adsorption isotherms, and the results presented that the equilibrium data obeyed both the Langmuir and Freundlich models. Thermodynamic parameters of Δ G ° and Δ H ° verified the spontaneous and exothermic nature of the methyl orange adsorption onto HNTs/PPy. Furthermore, the regeneration experiments revealed that HNTs/PPy nanocomposites could be reused after treated with hydrochloric acid solution, showing potential applications in purification of dyeing effluents.
研究领域:
环境科学
·
材料科学
·
纳米技术
·
吸附
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Haohong Yu,Ming Huang,Minshi Huang,Mingxian Liu
Development of effective anti-icing/deicing strategy is of technical importance, as the natural phenomenon of icing has raised many problems for human social production as well as industrial activities. In this study, a superhydrophobic and colored surface (AC/POS@HNTs) with excellent photothermal deicing properties was designed by combining silane-modified halloysite nanotubes (POS@HNTs) and emerald-green acrylic dye (AC) as photothermal materials. Compared with traditional black photothermal materials, AC/POS@HNTs achieve better photothermal conversion efficiency. The modified HNTs powder was coated on different substrates by double-sided tape, which displays remarkable hydrophobic properties with a water contact angle of up to 154° and a rolling angle of 4°. Moreover, the superhydrophobic HNTs coated surface exhibits excellent photothermal characteristics, attaining an equilibrium temperature of 106.3 °C within 20 s under an intensity of 1 W/cm2 of 808 nm laser light. Additionally, the temperature of the green hydrophobic surface can reach 55 °C under one solar intensity. This results in a significant increase in the deicing rate (16.91%/min) compared to the control group (14.14%/min) and extends the anti-icing time from 71 to 245 s. This work presents a nonblack photothermal composite using hydrophobic modified HNTs and emerald-green acrylic dye, offering promising applications in aviation, roadways, and infrastructure as anti-icing/deicing materials.
研究领域:
材料科学
·
纳米技术
·
表面工程
·
能量转换
·
防除冰技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 9
·4867-4877
·
IF 3.784
Jian Wang,Yan Zhang,Weikun Ning,Peiping Zhang,Bo Jin,Yan Wang,Wei Zhang,Wenqing Li,Cundi Wei,Shiding Miao
A new class of catalytically self-propelled nanomotors were fabricated by modifying natural clay tubes, halloysite, with randomly distributed particles of MnO 2 and Fe 3 O 4 . The prepared MnO 2 –Fe 3 O 4 /HNTs composites were validated to be efficient Fenton catalysts in the degradation of rhodamine B (RhB). Compared to the previous preparation of rolled-up microtubes or other template-assisted syntheses, this strategy has its merits in utilizing clay minerals of abundance, cheap-price, and no complex instruments needed. The nanomotors were able to be prepared on a large scale. The MnO 2 –Fe 3 O 4 /HNTs motors displayed powerful autonomous movement, and a high velocity of up to 380 µm s −1 was achieved in 5.0 wt. % H 2 O 2 solution. For Fenton catalysis of RhB, the removal ratio of 94% dye molecules was obtained within 30 min, which was triply higher than other samples of the nonpropelling sample Fe 3 O 4 /HNTs. The autonomous movement provided adsorptive bubble separation, and the adsorption capacity was greatly enhanced by halloysite. These synergistic effects boosted the removal efficiency of dye molecules. The presence of magnetic MnO 2 –Fe 3 O 4 made these motors move directionally in external magnetic fields and provided a facile recovery for collecting heterogeneous catalysts.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Jian Wang,Jiwen Si,Yizhan Hao,Jingyao Li,Peiping Zhang,Chuanxiao Zuo,Bo Jin,Yan Wang,Wei Zhang,Wenqing Li,Ruifeng Guo,Shiding Miao
Halloysite-based tubular nanorockets with chemical-/light-controlled self-propulsion and on-demand acceleration in velocity are reported. The nanorockets are fabricated by modifying halloysite nanotubes with nanoparticles of silver (Ag) and light-responsive α-Fe2O3 to prepare a composite of Ag–Fe2O3/HNTs. Compared to the traditional fabrication of tubular micro-/nanomotors, this strategy has merits in employing natural clay as substrates of an asymmetric tubular structure, of abundance, and of no complex instruments required. The velocity of self-propelled Ag–Fe2O3/HNTs nanorockets in fuel (3.0% H2O2) was ca. 1.7 times higher under the irradiation of visible light than that in darkness. Such light-enhanced propulsion can be wirelessly modulated by adjusting light intensity and H2O2 concentration. The highly repeatable and controlled “weak/strong” propulsion can be implemented by turning a light on and off. With the synergistic coupling of the photocatalysis of the Ag–Fe2O3 heterostructure and advanced oxidation in H2O2/visible light conditions, the Ag–Fe2O3/HNTs nanorockets achieve an enhanced performance of wastewater remediation. A test was done by the catalytic degradation of tetracycline hydrochloride. The light-enhanced propulsion is demonstrated to accelerate the degradation kinetics dramatically. All of these results illustrated that such motors can achieve efficient water remediation and open a new path for the photodegradation of organic pollutions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Puxiang Zhao,Jiaojiao Hu,Yue Feng,Feng Wu,Cuiying Tan,Xiaodan Chen,Mingxian Liu
Copper-based Fenton-like agents have the ability to convert weakly oxidizing H 2 O 2 into highly oxidizing hydroxyl radicals (·OH) at tumor sites during chemodynamic therapy (CDT). In this study, the interfacial attraction properties between the negatively charged OCP − in sodium phosphathynolate (NaOCP) and the positively charged environment inside the lumen of halloysite nanotubes (HNTs) were utilized to synthesize Cu 3-x P nanoparticles in situ within the HNTs. The study investigated the chemical composition , morphology, and structure of Cu 3-x P@HNTs. The results indicated uniform distribution of Cu 3-x P particles measuring 3–5 nm within HNTs' lumen. Experiments conducted internally and externally to cells confirmed the catalytic capability of Cu 3-x P@HNTs to oxidize H 2 O 2 to ·OH. Furthermore, CP@H-CM was synthesized by enclosing Cu 3-x P@HNTs in a cancer cell membrane , which selectively targets cancer cells. The experiments revealed the cytotoxicity of CP@H-CM on 4T1 cells. Additionally, the antitumor efficacy of CP@H-CM was evaluated in vivo through tumor recurrence experiments in mice. Moreover, the efficacy of CP@H-CM in repressing tumor growth was enhanced by incorporating infrared laser , indicating a synergistic photodynamic treatment for breast cancer. This study presents an efficacious and viable therapeutic approach to inhibit postoperative tumor reappearance. The implications of this approach are promising, particularly in the domain of tumor treatment and metastasis.
✓ 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）