SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2024
·
IF 6.3
Wei Xie,Xiaoke Li,Jiaying Zhou,Fei Yin,Yaogang Jiang,Liu Yang
In this study, a novel approach for the synthesis of eco-friendly and cost-effective composite nanomaterials PPy@HNTs was introduced. The proposed synthesis method offers environmental friendliness, simplicity, and cost-effectiveness. The resulting PPy@HNTs nanofluids , obtained through dispersion in a specially formulated base solution, demonstrate excellent dispersion stability , desirable thermophysical properties , and remarkable photothermal conversion performance. At a concentration of 800 ppm, the PPy@HNTs nanofluids exhibited an impressive efficiency of 79.2 %, surpassing the performance of conventional heat transfer fluids (HTFs). This research presents a promising avenue for the utilization of low-cost nanofluids in the field of photothermal applications.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Yan Qin,Zhujun Xiao,Jianning Wu,Lin Cui,Guihua Meng,Shengchao Yang,Zhiyong Liu,Xuhong Guo
At present, it is very important to develop a nanoparticle drug delivery system that can spread and retain the leaf surface of plants at the same time, which can improve the loss of pesticide carriers on the leaf surface and improve the bioavailability of pesticides. The photosensitive pesticide chlorpyrifos was loaded with halloysite nanotubes. The coating of polydopamine (PDA) provided the interface adhesion ability for the pesticide carrier, and the assembly of cationic oligomeric surfactant provided the wetting and spreading ability for the pesticide carrier. The wettability and spreadability of pesticide carrier can be adjusted by changing the length of hydrophobic chain segment, and the contact angle of cotton leaf surface can reach 36.87°. The retention rate after simulated rain erosion can reach 83.65 %. The maximum release rate was 60.76 % after 60 hours of cumulative release, which showed sustained release performance. After 24 h of simulated solar illumination, the degradation rate of chlorpyrifos (CPF) was 62.76 %. Improving the adhesion and wetting spreading ability of inorganic nanopesticide carriers on leaf surface and reducing the loss and degradation of CPF of photosensitive pesticides play a positive role in improving the bioavailability of pesticides, so it has a wide range of significance in agricultural applications and environmental protection.
研究领域:
农业科学
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环境科学
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植物保护
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zongrui Zhang,Shiyu Huang,Pengxiao Wei,Shuangqing Li,Yafei Zhao,Yinze Yang,Bing Zhang
Latent heat storage systems based on organic phase change materials (PCMs) are considered to be an efficient solar energy utilization strategy, but leakage vulnerability and insensitivity to sunlight of PCMs limit their further application in energy storage. In this work, a new hierarchical porous aerogel was constructed with the carbon intercalated halloysite nanotubes (CHNTs) as the assembly units for PCMs encapsulation to improve the load weight, stability and sunlight absorption. The CHNTs were first successfully synthesized through intercalation and carbonization, with the aim of increasing their specific surface area and sunlight absorption. Subsequently, the CHNTs/polyvinyl alcohol (PVA) aerogels with 3D honeycomb structure were prepared by self-assembly using a freeze-drying method, which can significantly promote the encapsulation ratio of lauric acid (LA) in the pores of both aerogels and CHNTs. The CHNTs can not only improve compressive strength of the aerogels and shape stability of the composite PCMs, but also enhance light absorption ability of the composites compared to pristine HNTs. As a support material, CHNTs aerogel (CHNP) loaded more than 92 wt% PCM (LA@CHNP) and exhibited an extremely high latent heat capacity (170.9 J/g). The LA@CHNP had good structural and thermal stability in 300 cycles without visible leakage. Besides, solar energy absorption increased from 43 % to 98 %, and the solar-to-thermal energy conversion efficiency increased to 95.88 %, which could be attributed to 3D porousness and carbon nanolayers of the CHNTs. We have successfully synthesized an eco-friendly and facile composite LA@CHNP, which will contribute to the design of advanced composites with excellent solar energy storage properties, and provide a new direction for the application of carbonized materials.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2021
·
IF 9.127
Peijie Xu,Chunyuan Wang,Bingxin Zhao,Yi Zhou,Hongfei Cheng
Zinc-ion batteries (ZIBs) promises to satisfy the development of flexible and wearable electronic devices. However, it remains a challenge to render the electrolyte of flexible ZIBs operating in harsh conditions during daily use, while maintaining their stability and durability. Herein, we report a high-strength and ultra-stable hydrogel electrolyte by crosslinking the halloysite nanotubes (HNTs) modified by 3-Methacryloxypropyltrimethoxysilane (MPS) with polyacrylamide (PAM), denoted as M-HNTs/PAM. The M-HNTs/PAM hydrogel exhibits a large strain of 1200% with a strength of 49 kPa. The designed flexible Zn/Zn symmetric batteries based on M-HNTs/PAM hydrogel electrolyte enable stable Zn plating and stripping over 1200 h at 4.4 mA cm −2 and 1.1 mA h cm −2 . The flexible ZIBs based on M-HNTs/PAM hydrogel electrolyte possess outstanding cycling stability and great capacity retention of 92.7% after 1000 cycles at 10 C. Moreover, the flexible ZIBs can overcome violent tests of bending, folding, hammering, and even poking. It opens up new perspectives to utilize clay minerals and provides new valuable insights for durable wearable and stretchable energy storage devices.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Jiali Yuan,Zhen Chen,Qiang Yu,Wei Zhu,Shuting Li,Lei Han,Xia Lu,Shutong Li,Yize Wu,Ze Lv,Hongjun You,Bangyao Chen
Electrode materials are the core of electrocatalytic oxidation technology. Herein, chitosan (CTS)-modified halloysite nanotubes (HNTs) were used for the first time in the doping modification of PbO 2 electrodes by electrodeposition technique, and novel HNTs-CTS-PbO 2 anodes were prepared and used for the electrochemical removal of the thiazine dye methylene blue (MB). The surface structure information, electrochemical properties and oxidation activity of the materials were systematically investigated, and possible degradation pathways of methylene blue were proposed. The results showed that after doping modification, the coating became flatter and denser, and the crystalline shape and crystalline phase of the PbO 2 electrode did not change, but the grain size was significantly reduced; moreover, the modified electrode had higher oxygen precipitation overpotential, larger reactive surface area and lower charge transfer resistance. Additionally, the decolorization degradation of MB by HNTs-CTS-PbO 2 electrode mainly adopts an indirect degradation mechanism and follows the pseudo-first-order kinetic model, which exhibits higher decolorization degradation rate. Analyzing the mechanism of the electrochemical removal of MB from the modified anode, which mainly involves the breakage of C N bonds under the action of ·OH, followed by demethylation and aromatic ring cleavage to obtain monoaromatic amines, sulfonic acids and phenolic compounds, and finally mineralized into inorganic small molecules such as CO 2 and H 2 O. The above results show that HNTs-CTS-PbO 2 anode is a promising candidate in the field of dye wastewater degradation and provide new insights for the application of HNTs .
研究领域:
环境科学
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材料科学
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电化学工程
✓ 已验证
DOI
高影响因子
POLYMER TESTING
·
2019
·
IF 2.943
Yuhai Wang,Cong Liu,Junjian Lai,Chaoliang Lu,Xiaoman Wu,Yuqu Cai,Liqiang Gu,Liting Yang,Guohong Zhang,Guang Shi
Ammonium polyphosphate (APP) and soy protein (SP) were used to form biodegradable intumescent flame retardants (BIFR) and further combined with halloysite nanotubes (HNTs) to prepare environmentally friendly intumescent flame retardants (EIFR) to enhance the flame retardancy of poly(butylene succinate) (PBS). Thermogravimetric analysis (TGA), cone calorimeter test and the observation of char residue showed that SP acted as both char source and gas source in BIFR. BIFR with APP/SP (2/1) had the best char-forming capability for PBS, significantly increasing the limiting oxygen index (LOI), reducing peak heat release rate (PHRR) and total heat release (THR), but increasing the total smoke release (TSR). HNTs had a synergistic effect with BIFR to improve the flame retardancy of PBS when at an appropriate content. Addition of 1.0 wt% HNTs increased the LOI, and reduced the PHRR and THR, especially the TSR. However, the synergistic effect became week or diminished when the content of HNTs increased to 1.5 wt% and 3.0 wt%. The possible flame retardant mechanism of EIFR for PBS was proposed. Mechanical test showed that HNTs improved the tensile strength and impact strength of PBS/EIFR composites. The result of soil burial test indicated that BIFR accelerated the biodegradation of PBS. This work may offer a strategy for providing environmentally friendly flame retardants for biodegradable polymers such as PBS, and also addressing the environmental harmfulness of traditional intumescent flame retardants.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2017
·Vol. 28
·期 37
·375101
·
IF 3.44
Yuwei Hu,Jian Chen,Xiufang Li,Yanhua Sun,Shen Huang,Yuqing Li,Hui Liu,Jiangfeng Xu,Shian Zhong
The current state of cancer therapy encourages researchers to develop novel efficient nanocarriers. Halloysite nanotubes (HNTs) are good nanocarrier candidates due to their unique nanoscale (40–80 nm in diamter and 200–500 nm in length) and hollow lumen, as well as good biocompatibility and low cost. In our study, we prepared a type of folate-mediated targeting and redox-triggered anticancer drug delivery system, so that Doxorubicin (DOX) can be specifically transported to tumor sites due to the over-expressed folate-receptors on the surface of cancer cells. Furthermore, it can then be released by the reductive agent glutathione (GSH) in cancer cells where the content of GSH is nearly 103-fold higher than in the extracellular matrix. A series of methods have demonstrated that per-thiol-β-cyclodextrin (β-CD-(SH)7) was successfully combined with HNTs via a redox-responsive disulfide bond, and folic acid-polyethylene glycol-adamantane (FA-PEG-Ad) was immobilized on the HNTs through the strong complexation between β-CD/Ad. In vitro studies indicated that the release rate of DOX raised sharply in dithiothreitol (DTT) reducing environment and the amount of released DOX reached 70% in 10 mM DTT within the first 10 h, while only 40% of DOX was released in phosphate buffer solution (PBS) even after 79 h. Furthermore, the targeted HNTs could be specifically endocytosed by over-expressed folate-receptor cancer cells and significantly accelerate the apoptosis of cancer cells compared to non-targeted HNTs. In vivo studies further verified that the targeted HNTs had the best therapeutic efficacy and no obvious side effects for tumor-bearing nude mice, while free DOX showed damaging effects on normal tissues. In summary, this novel nanocarrier system shows excellent potential for targeted delivery and controlled release of anticancer drugs and provides a potential platform for tumor therapy.
研究领域:
纳米技术
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药学
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癌症研究
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生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yifang Zhang,Hongyao Zhao,Jiayi Zhou,Yanyun Wang,Yangping Zhang,Jialing Shen,Danhong Shang,Feng Zeng,Jianming Pan,Yiyan Song,Fu Yang,Edison Huixiang Ang
Advanced environmental governance techniques using photothermal nanomaterials for pollutant removal and water recycling are highly regarded. Here, we incorporated CoO nanospecies onto halloysite nanotubes via in-situ polymerization of tannic acid coordinated with Co ions and carbonization. The resulting halloysite nanotube hybrids with CoO/carbon layer (HNTs@CoO/C) afford great exposure of CoO nanospecies onto the N-doping carbon layer modified halloysite. Compared to composites without a carbon layer, optimized Co(II)/Co(III) redox cycles are achieved. More pyridine nitrogen species on the carbon layer enhance the catalyst's surface affinity for polar contaminants. HNTs@CoO/C has nearly 8.6 fold higher catalytic degradation efficiency for norfloxacin (0.164 min −1 versus 0.019 min −1 for HNTs@CoO). Quenching experiments show that co-existing multiple active species ( SO₄ − , OH, O₂ − , and 1 O₂) play important roles in norfloxacin (NFX) degradation, among which 1 O₂ is dominant. The optimal HNTs@CoO/C also effectively removes other contaminants like sulfadiazine (SDZ), tetracycline (TC), oxytetracycline (OTC), and carbamazepine (CBZ). Moreover, anchoring HNTs@CoO/C on a used cotton towel forms a 2D evaporator. Under the simulated sunlight, it has a good photothermal conversion ability, heating from 19.9 °C to 40.3 °C in 8 min. As a floatable system, it efficiently evaporates water and degrades contaminants in the presence of PMS. These results indicate the potential of this approach for water treatment and resource utilization.
研究领域:
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 Environmental Chemical Engineering
·
2024
·
IF 7.4
Shengyou Wu,Shuaifei Zhao,Zhe Zhai,Yan Huang,Shiwei Liu,Hao Yang,Yuchao Zhao
Membrane distillation (MD) is a viable technology and potential candidate for desalination of hypersaline wastewater. Nevertheless, MD membranes with high flux and superior antiwetting ability face a significant challenge for realizing high-efficient desalination. Herein, polyvinylidene fluoride (PVDF) hydrophobic porous membranes are fabricated by non-solvent induced phase separation. The structure of PVDF membranes, such as pore type, size, porosity, and surface hydrophobicity, can be well tuned over a wide range via adjusting phase separation conditions. To enhance the robustness of PVDF membrane, hydrophobized halloysite nanotubes (HNTs) are blended for membrane fabrication. The enhanced mechanical strength of membrane increases wetting resistance via inhibiting pore deformation and LEP reduction during salt crystals growth. In the treatment of hypersaline wastewater (70 g∙L −1 ) containing 3 g∙L −1 CaCl 2 and 3 g∙L −1 Na 2 SO 4 via VMD, the HNTs/PVDF membrane with 50 wt% HNTs shows a high flux of 54 L∙m −2 ∙h −1 , over 99.99 % NaCl rejection, and outstanding stability for 100 h. Our work not only offers a novel strategy to enhance wetting resistance of MD membranes for hypersaline wastewater treatment, but also demonstrates that the mechanical strength of membranes also significantly influences antiwetting ability of MD membranes.
研究领域:
环境工程
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材料科学
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脱盐技术
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 3
·761
·
IF 3.1
Yanli Dou,Aixun Ju,Zheng Zhong,Yutong Huo,Weiguo Yao
Unsaturated polyester resin (UPR) with excellent flame retardant is mainly obtained by adding large amounts of flame retardants, usually at the expense of mechanical properties. In this work, a reactive flame retardant containing phosphorus and nitrogen (DOPO-N) was successfully synthesized and incorporated in UPR as a crosslinker. The mechanical and flame-retardant properties of UPR composites were enhanced. UPR/30DOPO-N passed a UL-94 V-1 rating with a limiting oxygen index (LOI) of 30.8%. The tensile strength of UPR/30DOPO-N increased by 24.4%. On this basis, a small amount of modified HNTs (VHNTs) was added to further improve the flame-retardant properties of the composite. With the introduction of 3 wt% VHNTs, the composite passed the UL-94 V-0 rating. The peak of heat release rate (PHRR) and total heat release (THR) of it decreased by 60.7% and 48.3%, respectively. Moreover, the detailed flame-retarding mechanism of DOPO-N and VHNTs was investigated by thermogravimetric infrared spectroscopy (TG-IR), Raman spectra, and X-ray photoelectron spectroscopy (XPS). It was found that DOPO-N played a role in quenching the flame in the gas phase and cooperated with VHNTs to enhance the barrier effect in the condensed phase.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2026
·
IF 4.3
Shaozhi Wang,Yuli Liu,Chunhui Duan,Weihua Meng,Jixing Xie,Jianzhong Xu
Unsaturated polyester resin (UPR) is a long-chain, hydrocarbon-rich thermoset that is intrinsically highly flammable, which severely limits its engineering applications. Herein, NiCo-layered double hydroxide (NiCo-LDH) nanosheets were covalently grafted onto halloysite nanotubes (HNTs) via an in situ substitution route that employed ZIF-67 as a sacrificial bridging agent, yielding a hierarchical HNTs@NiCo-LDH hybrid. Upon incorporation into UPR, the hybrid formed a dense metal oxide shield during combustion that suppressed the release of combustible volatiles and attenuated radiative heat feedback, thereby imparting superior flame retardancy. Cone calorimetry revealed that 6 wt % HNTs@NiCo-LDH (UPR-H@L) reduced the peak heat release rate by 37.0% and the peak smoke production rate by 23.9% relative to neat UPR. Transition-metal-catalyzed charring generated a compact, continuous carbonaceous barrier that further inhibited mass and energy transfer. Simultaneously, the tensile and impact strengths of UPR-H@L increased, demonstrating a synergistic reinforcement effect. This work establishes a facile physical-barrier/chemical-catalytic strategy for simultaneously enhancing the fire safety and mechanical performance of UPR composites.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Coatings Technology and Research
·
2026
·
IF 3.4
Pham Thanh Hai,Tran Van Cuong,Nguyen Nhi Tru
Halloysite nanotubes (HNTs) loaded with the corrosion inhibitor benzotriazole (BTA) have been utilized to enhance the corrosion resistance of epoxy coatings. To improve BTA loading capacity, the HNTs were thermally treated and modified with Zn 2+ ions. Furthermore, to control the release of BTA, Zn 2+ ions were also used to form Zn–BTA complexes at the tube ends, acting as end stoppers. Thermogravimetric analysis showed that the combination of heat treatment and Zn 2+ modification significantly increased the BTA loading capacity of HNTs, reaching up to 15.5 wt%. UV–Vis spectroscopy demonstrated that, under neutral conditions, the additive with Zn 2+ end stoppers exhibited a much slower BTA release rate compared to the non-end-stoppered system, while the release rate significantly increased in acidic environments. The corrosion protection performance of epoxy coatings containing the BTA-loaded, Zn 2+ -modified HNTs was evaluated using electrochemical methods and salt spray testing. Results indicated that a 3 wt% additive loading provided the best corrosion resistance, significantly outperforming conventional epoxy coatings. Additionally, salt spray tests on commercial zinc-rich epoxy coatings with scribed defects revealed that the inclusion of the BTA-loaded, Zn 2+ -modified HNTs imparted active corrosion inhibition. These findings suggest that the prepared benzotriazole-loaded zinc ion-modified HNTs are a promising candidate for incorporation into epoxy coatings to improve the anticorrosion performance of carbon steel.
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DOI
高影响因子
危险品化学品经营许可证（带存储）