WATER RESEARCH
·
2024
·
IF 11.4
Zhenyu Wang,Yu Kong,Xuesong Cao,Ning Liu,Chuanxi Wang,Xiaona Li,Baoshan Xing
Heteroaggregation between nanoplastics (NPs) and titanium dioxide nanoparticles (TiO 2 NPs) determines their environmental fates and ecological risks in aquatic environments. However, the co-photoaging scenario of NPs and TiO 2 NPs, interaction mechanisms of TiO 2 NPs with (aged) NPs, as well as the dependence of their heteroaggregation on TiO 2 NPs facets remain elusive. We found the critical coagulation concentration (CCC) of polystyrene nanoplastics (PSNPs) with coexisting RTiO 2 NPs was 1.9 − 2.2 times larger than that with coexisting ATiO 2 NPs, suggesting a better suspension stability of PSNPs+RTiO 2 NPs. In addition, CCC of TiO 2 NPs with coexisting photoaged PSNPs (APSNPs) was larger 1.7 − 2.2 times than that with PSNPs coexisting, indicating photoaging inhibited their heteroaggregation due to increasing electrostatic repulsion derived from increased negative charges on APSNPs and the polymer-derived dissolved organic carbon. Coexisted TiO 2 NPs promoted oxidation of PSNPs with the action of HO· and O 2 ·– under UV light, leading to inhibited heteroaggregation. Moreover, Van der Waals and Lewis-acid interaction dominated the formation of primary heteroaggregates of PSNPs-TiO 2 NPs (E SE = ‒2.20 ∼ ‒2.78 eV) and APSNPs-TiO 2 NPs (E SE = ‒3.29 ∼ ‒3.67 eV), respectively. The findings provide a mechanistic insight into the environmental process of NPs and TiO 2 NPs, and are significant for better understanding their environmental risks in aquatic environments.
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高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 18
·6606-6614
·
IF 5.7
Muhammad,Zengce Liu,Junchun Li,Yuanyuan Sheng,Yajing Chang,Ping Chen,Yang Jiang
Lead-free halide perovskites have been developed and have received increasing attention in optoelectronic applications due to their non-toxicity. However, single perovskite phosphors that emit vibrant, tunable-color-temperature white-light are rare. Herein, we used the anti-solvent precipitation method to develop white light-emitting diodes (WLEDs) based on rare-earth-based Sb3+ and Mn2+ co-doped Cs2KYCl6 microcrystals (MCs). The Cs2KYCl6 MCs exhibit tunable dual emissions covering a wideband ascribed to the emission of self-trapped excitons (STEs) from Sb3+ and the 4T1 to 6A1d–d transition of Mn2+. The optimal photoluminescence quantum yield (PLQY) of doped Cs2KYCl6 is 65.78%. The energy transfer process from Sb3+ to Mn2+ is revealed. WLEDs have been successfully constructed by combining the dual emissions from STEs of Sb3+ and the d–d transition of Mn2+. These WLEDs demonstrate impressive optical performance, including CIE chromaticity coordinates (0.3483, 0.4125) and a color rendering index (CRI) of 85.4. This work provides an effective strategy for developing WLEDs based on a single-component material, lead-free perovskites.
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CONSTRUCTION AND BUILDING MATERIALS
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2025
·
IF 8
Xiao Yang,Jinxiang Hong,Zijia Xiong,Wei Liu,Minghui Gong,Jinliang Cheng,Zhenghong Xu,Chuanqing Fu
Polyurethane (PU) is recognized as a promising material for asphalt modification due to its tunable physicochemical properties. To reduce reliance on petroleum-based polyols, this study employed bio-derived castor oil (CO) combined with polytetrahydrofuran (PTMEG), diphenylmethane diisocyanate (MDI), and 1,4-butanediol (BDO) as raw materials. Polyether-type PU (PTMEG-MDI) and polyether/castor oil composite PU (PTMEG/CO-MDI) were successfully synthesized through controlled hard segment content ( C h ) and isocyanate index ( r ), followed by application in asphalt modification. The structure-property relationships were investigated using FTIR, TGA, DSC, and mechanical testing systems. The results demonstrated that the incorporation of CO significantly enhanced the comprehensive performance of PU composites. Compared to the single polyether-type PU, the PTMEG/CO composite PU exhibited better thermal stability, mechanical strength, and elongation at break. Increasing C h continuously improved the Shore hardness and tensile strength of PU, while reducing its thermal stability and elongation at break. When r reached 1.2, the PU molecular chains attained an optimal stability equilibrium state. FTIR analysis confirmed chemical reactions between the -NCO groups in PU and active components of asphalt, forming characteristic urethane absorption peaks, thereby achieving chemical bonding modification. In terms of asphalt modification performance, the PTMEG/CO-MDI system notably enhanced high-temperature stability while maintaining favorable low-temperature performance. This research establishes fundamental correlations between PU molecular design parameters ( C h and r ) and asphalt modification performance, providing theoretical guidance for developing eco-friendly high-performance asphalt modifiers.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Lin Li,Jiawei Zhao,Shaohua Luo,Pengyue Xing,Xinglong Teng,Zhenzhu Cao,Guorong Li
Materials with colossal permittivity (CP) have been extensively investigated for their promising applications in energy storage devices. In this work, the composition, microstructure and dielectric properties of (Na 0.25 Ta 0.75 ) x Ti 1–x O 2 (x = 0–0.04) ceramics were systematically investigated. Co-doped TiO 2 ceramics demonstrated giant dielectric constants. The optimized dielectric properties were achieved in (Na 0.25 Ta 0.75 ) 0.02 Ti 0.98 O 2 with high dielectric constant (7.32 × 10 4 ) and low loss (0.034) at 1 kHz. The origin of CP was explored by dielectric, complex impedance spectroscopy and X-ray photoelectron spectroscopy measurements. The giant dielectric constant primarily stems from the electronic pinning defect dipole effect and the internal barrier layer capacitance effect. This finding might shed light on the design of high-performance giant dielectric materials.
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Applied Materials Today
·
2025
·
IF 6.9
Yisheng Hu,Ya Wang,Yuqing Cai,Xiaodong Xu,Liping Zhao,Jing Zhang
Melanoma is a leading cause of cancer-related deaths. Surgical excision, the standard treatment, often results in incomplete removal and recurrence. A double-layered microneedle patch was developed for chemo-photothermal treatment of melanoma. The patch, based on zwitterionic poly(sulfobetaine methacrylate) (SBMA), includes a slow-degrading hair particles/curcumin (HMP/Cur) layer and a fast-dissolving ZIF-8/doxorubicin/ Panax notoginseng polysaccharide (ZIF-8@DOX/PNPS) layer, with an asiaticoside/ HMP (AS-HMP) substrate. Prepared via a three-step casting process, the microneedles exhibit excellent photothermal properties and tumor synergism under near-infrared (NIR) light. Upon skin insertion, the fast-dissolving layer releases ZIF-8@DOX within 5 min, which then releases DOX in the tumor's acidic environment. The HMP/Cur layer heats to 56.52 °C within 60 s under NIR, aiding in tumor elimination. In addition, the AS-HMP layer covers the wound and promotes tissue regeneration and collagen deposition, enhancing skin regeneration. The double-layered microneedles platform can simultaneously eliminate the tumor and accelerate wounding healing, making it a promising for clinical melanoma therapy.
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Molecular Catalysis
·
2025
·
IF 4.9
Rui Zhu,Fang Gao,Xinglong Li
The development of efficient catalysts for the stepwise oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformyl furan (DFF), 5-hydroxymethyl-2-furancarboxylic acid (HMFCA), 5-Formyl-2-furancarboxylic acid (FFCA) or 2,5-furandicarboxylic acid (FDCA) is critical for biomass valorization. Herein, we reported a bimetallic Co-Mn catalyst anchored on nitrogen-doped porous carbon, which was used for the oxidation of HMF to FDCA, avoiding the use of high temperature and high-pressure oxygen. High FDCA selectivity (>95 %) was achieved through reaction condition optimization. And HMF→DFF→FFCA→FDCA was considered to be the main reaction pathway during the whole oxidation process. Additionally, the chemical environment of the constituent elements of the used catalyst was analyzed by XPS. TEM revealed that the catalyst retained its porous structure and excellent metal dispersion after the reaction. This structural stability was corroborated by sustained >90 % FDCA selectivity over five consecutive reaction cycles. This work established a dual-metal synergy strategy for multi-step oxidation pathways, offering insights into the design of robust catalysts for biomass-derived platform molecule upgrading.
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ACS Nano
·
2025
·
IF 16
Ruonan Li,Runlin Ma,Li-Li Zhang,Wei Ma,Gonglei Shao,Xu Zhang,Yun Tian,Menggai Jiao,Zhen Zhou
To tackle the challenge in electrochemical nitrogen fixing and reduction in aqueous electrolytes, the conventional approach has been to suppress the competitive hydrogen evolution reaction. Nonetheless, proton provision is a crucial step in the nitrogen reduction pathway to produce ammonia, and a single active site faces the daunting task in striking a balance between high nitrogen fixation efficiency and fast protonation kinetics. This work presents a harmonic strategy featuring atomically dispersed dual Fe–Mo sites anchored in an N-doped carbon (FeMoNC) substrate, where a low-spin Fe center with enriched empty d orbitals aids in nitrogen fixation and activation, and the adjacent Mo site accelerates the protonation kinetics of N-containing intermediates at the Fe site via a distal associative mechanism. Driven by this co-catalytic mechanism, the FeMoNC catalyst achieves a Faradaic efficiency of 37.42%, marking a significant improvement of 7.8- and 10.6-fold over Fe or Mo single-atom catalysts, respectively. Furthermore, an excellent NH3 yield of 54.40 μg h–1 mgcat.–1 is realized in a flow cell by enhancing mass transfer. This study provides valuable insights into diatomic co-catalytic mechanisms for electrochemical ammonia synthesis.
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JOURNAL OF PHARMACEUTICAL SCIENCES
·
2025
·
IF 3.8
Ping-fu Huang,Wen-Min Niu,Lu-lu Liu,Guan-qiao Wang,Jun Chen,Zhou-xun Dong,Jia-bing Tong
Paclitaxel (PTX), categorized as a BCS Class IV anti-tumor agent, is integral to clinical treatment, however, the insolubility of PTX leads to diminished bioavailability. Resveratrol (RES), a bioactive compound present in various dietary sources, has the potential to augment the anti-tumor effectiveness of PTX. This research aims to formulate a co-amorphous system consisting of PTX and RES to enhance the solubility and bioavailability of PTX. The co-amorphous system was synthesized via the solvent evaporation technique and subsequently characterized using powder X-ray diffraction, Fourier-transform infrared spectroscopy, differential scanning calorimetry, Raman spectroscopy, and thermal analysis. Molecular dynamics simulations illustrated the interactions between PTX and RES, which facilitated an increase in apparent solubility and in vitro dissolution rates. Furthermore, in vitro cytotoxicity assays, Caco-2 cell model studies, and in vivo anti-tumor experiments demonstrated that the PTX-RES combination exhibited enhanced anti-tumor efficacy relative to other treatment groups. Pharmacokinetic evaluations revealed that the oral bioavailability of the PTX-RES complex surpassed that of pure PTX. These findings substantiate that the PTX-RES co-amorphous system significantly improves the physicochemical properties and anti-tumor activity of PTX. Additionally, this study presents a promising approach for enhancing the solubility and bioavailability of compounds with poor solubility.
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ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Wing-Fu Lai,Andrei S. Susha,Andrey L. Rogach
Multidrug therapy may yield higher therapeutic effects as compared to monotherapy, yet its wide application has been hampered by the limitations of conventional drug delivery systems, in which not only incompatible drugs cannot be co-delivered but also the release rates of individual co-delivered drugs cannot be tuned separately. Regarding these limitations, we adopt the microfluidic electrospray technology to fabricate alginate-based multicompartment microgel beads. By using cadmium–telluride (CdTe) quantum dots (QDs) and a quenching agent as a model pair, the beads are shown to effectively separate incompatible drugs during co-delivery, and significantly prolong the time of observable fluorescence emission from QDs co-delivered with a quenching agent. Moreover, the drug release rates from different compartments can be tuned using the polymer blending technique to achieve a variety of drug release patterns. This study is one of the first to adopt the microfluidic electrospray technology to generate microgel beads with such versatility for co-delivery of multiple drugs. Our results provide evidence for the promising potential of our beads to be further developed as a carrier for multidrug therapy and other applications that require co-administration of multiple bioactive agents.
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高影响因子
IONICS
·
2022
·Vol. 28
·期 10
·4825-4832
·
IF 2.961
Yang Lu,Zhang Yu,He Zhiyuan,Tang Xin,Dong Qiaoyan,Tang Jiayuan,Huang Ke,Zou Zhirong,Yu Huimin,Xiong Xiaoli
Cobalt-based catalysts are widely used as non-enzymatic electrochemical sensors due to their high natural abundance, low-cost, tunable valence states, and high electron transfer efficiency. In this work, carbon matrix-embedded cobalt metaphosphate nanosheets (Co 2 P 4 O 12 -C/CC) was successfully prepared by a phosphorylation process of cobalt zeolitic imidazolate frameworks (Co-ZIF) grown on carbon cloth (CC). Benefiting from the many gaps between the carbon matrix-embedded nanosheet arrays, the specific surface area and active sites of the catalyst electrode and its stability are significantly increased. As a working electrode, a non-enzymatic electrochemical sensor for glucose was constructed. The sensor exhibits good sensitivity ( 2092 µA mM −1 cm −2 ) with linear range of 1.0 µM to 2.0 mM and detection limit of 0.12 µM (S/N = 3). Further analysis of human serum obtained satisfactory results. This work opens a new door for the construction and application of cobalt-based non-enzymatic electrochemical sensors.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2023
·Vol. 129
·期 11
·1-11
·
IF 2.7
Lingling Yang,Yanjie Zhu,Haokai Liu,Tao Guo,Hui Tang,Shuangdong Ya,Yu Li,Hongguang Wang,Yanli Luo,Jiuming Ma,Dong Wan
Galvanostatic electrochemical co-deposition was used to fabricate nickel-based reduced graphene oxide (Ni–rGO) nanocomposite by varying the current density in the range of 3–6 Adm −2 and at rGO loading of 1 g L −1 . The process relies on the reduction of oxygenated functional groups of GO. By excessive incorporation and simultaneous reduction of GO in the structure of Ni–rGO composite coatings, the morphology transforms into structure with rough and three-dimensional (3D) features. The formation of Ni–rGO composite coatings was confirmed by investigating 3D morphology by SEM and XRD studies. Furthermore, comprehensive investigation of the thermal diffusivity, density, specific heat capacity, and thermal conductivity of Ni–rGO composite was conducted. Moreover, the relationship between current density and thermal conductivity was also evaluated. The test results indicate that the prepared Ni–rGO composite exhibits excellent thermal conductivity when the current density is 5 A dm −2 . Combined with the outstanding performance of corrosion resistance in the early stages, the as-prepared Ni–rGO composite coatings are highly promising for cooling systems in ship and heat dissipation system in ocean electronic equipment.
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CATALYSIS LETTERS
·
2020
·Vol. 150
·期 7
·2045-2055
·
IF 2.482
Li Chaoqun,Yang Yang,Ren Wei,Wang Jian,Zhu Tingyu,Xu Wenqing
Abstract CO is toxic and detrimental to human beings and the atmosphere. The presence of CO has become one of the important indicators for evaluating ambient air quality. Iron and steel sintering generate large amounts of flue gas emissions containing approximately 1% CO, which has become an important factor restricting the improvement of air quality in steel cities. The catalytic oxidation method is the simplest and most effective method for CO emission control. In this work, a series of Cu x Ce y /TiO 2 catalysts with different Ce doping levels were prepared by a one-step impregnation method and subsequently tested for catalytic CO oxidation. The Cu 0.5 Ce 0.5 /TiO 2 sample has the best catalytic activity under the conditions of 1% CO and 10% H 2 O. The catalysts were next characterized by XRD, BET, TEM, H 2 -TPR, XPS and in-situ DRIFTS methods. The characterization results show that Ce doping promotes the dispersion of copper species on the catalyst surface and improve the redox performance of the catalyst. The results of in-situ experiments showed that both Cu/TiO 2 and Cu 0.5 Ce 0.5 /TiO 2 catalysts followed Mars and van Krevelen mechanism, and Ce doping enhanced the adsorption and activation of oxygen, thus improving the low-temperature reaction activity of the catalysts. Graphic Abstract
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