BIOLOGICAL TRACE ELEMENT RESEARCH
·
2024
·
IF 3.4
Su Yue,Li Ming,Xie Honglei,Hou Xin,Zhao Meng,Li Jia,Pan Haowen,Zhang Zexu,Yue Zongyu,Che Wenjing,Liu Lanchun,Cao Jiasen,Liu Peng
Saliva iodine is a useful biochemical marker for evaluating iodine status and controlling iodine-related diseases. This study aims to establish and validate a simple, reliable, and low-cost Sandell-Kolthoff (S-K) method for the determination of iodine in saliva. The method was established by considering the digestion solution type, concentration, dosage, digestion time and temperature, the volume of saliva samples, glass tube size, dosage of arsenious acid solution and ammonium ceric sulfate solution, and warm bath time. Then, the effectiveness of the method was examined by the linearity of the standard curve, detection limit, precision, and accuracy. The 1.5 mL 1 Mol/L ammonium persulfate solution at 100 °C for 90 min, the 200 μL saliva sample, glass tubes of 15 mm × 120 mm, 2.5 mL arsenious acid solution, 0.3 mL ammonium ceric sulfate solution, and 15 min for warm bath was selected to determine saliva iodine. In terms of validation of the S-K method, the linearity method has the linear range of the standard curve from 0 to 300 μg/L and the coefficient of determination ≥ 0.999; the detection limit, when the volume of saliva samples was 0.2 mL, was 4.6 μg/L; for precision, the relative standard deviation was from 0.3 to 2.8%; and for accuracy, the total recovery rate ranged from 92.8 to 107.0%. This S-K method is easy to operate, has good precision and accuracy, and can be used as a method to determine saliva iodine. It has great potential practical value in disease prevention, clinical auxiliary diagnosis, and experimental research.
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高影响因子
JOM
·
2024
·
IF 2.1
Lei Shan,Wu Jiaxing,Miao Yu,Guo Bao
It is difficult to depress secondary copper sulfide minerals in the separative flotation of copper–molybdenum coexisting ores with a huge NaHS consumption, and causing serious safety and environmental problems. Galvanic interaction between active metallic granular (low consumption depressant; LCD) and secondary copper sulfide mineral particles can induce surface passivation, thereby depressing its floatability and achieving clean and efficient regulation of copper molybdenum separation. The use of 10% LCD was applied at the first stage and 5 kg/t NaHS at the second stage can recover 89.71% of Cu, while only 52.89% of Cu can be recovered for single stage flotation where 20 kg/t NaHS was used without any presence of LCD. To avoid the negative effect of Mg(OH) 2 colloids at higher pH at the second stage, sodium hexametaphosphate (SHMP) was added as a dispersant and Mo recovery could be pulled up to 89.63%.
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WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 10
·1-15
·
IF 3.8
Liu Xu,Kong Xiaomin,Wen Hao,Wang Yue,Wu Meili,Yin Hongwei,Qin Wei,Wang Manli,Pei Jun,Qu Miaoming
Coal gangue, a byproduct of coal mining with massive generation, presents a major challenge for resource utilization. In this study, SiO 2 aerogel was successfully fabricated from coal gangue, via a facile and cost-effective approach. The aerogel boasts an intricate network framework structure internally and functions as a mesoporous material with measurements of 154.5662 m 2 ·g −1 for specific surface area and 7.9557 nm for average pore size. Additionally, exploring the adsorption capabilities of SiO 2 aerogel concerning Pb(II) in wastewater, the research revealed insights. The results demonstrated that the maximum Pb(II) removal efficiency reached 94.09% under pH 6, aerogel dosage of 1.5 g·L⁻ 1 , and initial Pb(II) concentration of 80 mg·L⁻ 1 . The adsorption process followed the Langmuir isotherm model and pseudo-second-order kinetic model, suggesting a favorable and predominantly monomolecular layer chemisorption, and the intraparticle diffusion model suggests internal diffusion behavior during adsorption. The SiO 2 aerogel exhibited specific adsorption behavior towards Pb(II). This study offers a promising avenue for repurposing coal gangue while addressing the issue of Pb(II)-contaminated wastewater.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2024
·
IF 3.8
Sun Baohong,Cui Xin,Zhang Jiachen,Tang Yawen,Sun Hanjun
Hydrolytic nanozyme–based visual colorimetry has emerged as a promising strategy for the detection of aluminum ions. However, most studies focus on simulating the structure of natural enzymes while neglecting to regulate the rate of hydrolysis-related steps, leading to low enzyme-like activity for hydrolytic nanozymes. Herein, we constructed a ruthenium dioxide (RuO 2 ) in situ embedded cerium oxide (CeO 2 ) nanozyme (RuO 2 /CeO 2 ) with a Lewis acid–base pair (Ce–O-Ru-OH), which can simulate the catalytic behavior of phosphatase (PPase) and can be quantitatively quenched by Al 3+ to achieve accurate and sensitive Al 3+ colorimetric sensing detection. The incorporation of Ru into CeO 2 nanorods accelerates the dissociation of H 2 O, followed by subsequent combination of hydroxide species to Lewis acidic Ce–O sites. This synergistic effect facilitates substrate activation and significantly enhances the hydrolysis activity of the nanozyme. The results show that the RuO 2 /CeO 2 nanozyme exhibits a limit of detection as low as 0.5 ng/mL. We also demonstrate their efficacy in detecting Al 3+ in various practical food samples. This study offers novel insights into the advancement of highly sensitive hydrolytic nanozyme engineering for sensing applications.
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-14
·
IF 14.7
Yang Ming,Wang Lufang,Liu Wenliang,Li Wenlong,Huang Yewei,Jin Qiaofeng,Zhang Li,Jiang Yuanwen,Luo Zhiqiang
Electroceuticals, through the selective modulation of peripheral nerves near target organs, are promising for treating refractory diseases. However, the small sizes and the delicate nature of these nerves present challenges in simplifying the fixation and stabilizing the electrical-coupling interface for neural electrodes. Herein, we construct a robust neural interface for fine peripheral nerves using an injectable bio-adhesive hydrogel bioelectronics. By incorporating a multifunctional molecular regulator during network formation, we optimize the injectability and conductivity of the hydrogel through fine-tuning reaction kinetics and multi-scale interactions within the conductive network. Meanwhile, the mechanical and electrical stability of the hydrogel is achieved without compromising its injectability. Minimal tissue damage along with low and stable impedance of the injectable neural interface enables chronic vagus neuromodulation for myocardial infarction therapy in the male rat model. Our highly-stable, injectable, conductive hydrogel bioelectronics are readily available to target challenging anatomical locations, paving the way for future precision bioelectronic medicine.
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高影响因子
RARE METALS
·
2025
·
IF 11
Xia Shi-Yu,Li Xiang-Ji,Guo Ying-Jie,Yuan Jun-Jie,Sun Zhe-Fei,Cao Hui-Jun,Zhang Shu-Ye,Cai Wen-Zhi,Li Jin-Tang,Zhang Zhi-Hao
Cu nanoparticles exhibit excellent properties as high-temperature-resistant, conductive, heat-dissipating, and connecting materials. However, their susceptibility to oxidation poses a major challenge to the production of high-quality sintered bodies in the air, severely limiting their widespread adoption in power electronics packaging. This study presents a novel approach to the synthesis of Cu nanoparticles capped with oleylamine ligands. By employing a simple solvent-cleaning process, effective control of the density of oleylamine ligands on particle surfaces was achieved, resulting in high-performance Cu nanoparticles with both oxidation resistance and air-sintering susceptibility. Moreover, through our research, the solvent-cleaning mechanism was clarified, a model for the oleylamine ligand decomposition was developed, the air-sintering behavior of Cu nanoparticles was analyzed, and the impacts of both the sintered bodies and interfaces on the sintering performance were explained. Additionally, Cu nanoparticles subjected to 5 cleaning rounds followed by sintering at 280 °C and 5 MPa in air were confirmed to be able to produce the highest shear strength (49.2 ± 3.51 MPa) and lowest resistivity (6.15 ± 0.32 μΩ·cm). Based on these results, flexible capacitive pressure sensors with Cu sintered electrodes were fabricated and demonstrated a stable pressure–capacitance response over the temperature range of 25–250 °C. These findings underscore the impressive robustness and durability of sintered structures and the potential for high-temperature applications of oleylamine-capped Cu nanoparticles. Our study provides reliable application demonstrations for the low-cost manufacture of high-performance power electronics packaging structures that can operate in high-current–density, high-heat-flow-density, high-temperature, and high-stress environments. Graphical abstract
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FIBERS AND POLYMERS
·
2024
·
IF 2.2
Li Yafang,Yang Rui,Ma BeiNing,Zhao Yixia
Textiles have broad application prospects in the fields of flexible sensors and intelligent wearable devices due to their excellent breathability, softness, and structural elasticity. Piezoelectric sensors have become a hot topic in the field of wearable applications due to their ability to perform long-term sensing and detection. This article enhances the performance of composite materials by adding polydopamine (PDA) to improve the interaction between polymer matrix and nanofillers, and optimizes the composite nanofiber membrane synthesized by electrospinning polyvinylidene fluoride (PVDF) and barium titanate (BTO) nanoparticles. The content of β-phase in the optimized PVDF–BTO nanofiber membrane reached 81.58%. In bending mode, its open-circuit voltage reaches 10.36 V. Under vertical pressure conditions, when the pressure is 2.914N, the voltage of the sensor reaches 13.35 V, and the sensitivity of the nanofiber membrane is 2.918VN −1 , with a good linear relationship. This flexible piezoelectric sensor demonstrates various potential applications, including facial recognition, speech recognition, motion monitoring, etc. This research provides a simple and convenient way to develop high-performance self-powered wearable electronic products.
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Carbon Letters
·
2025
·
IF 5.8
Ren Fuyang,Zhu Hongze,Pan Haoran,Tian Lu,Wang Tao,Yu Jianglong,Dou Jinxiao,Wu Dongling,Chen Xingxing
The high value-added utilization of traditional coal resources is one of the important ways to achieve the strategic goals of carbon peaking and carbon neutrality. Simultaneously, coal-based carbon materials, noted for their cost-effectiveness, superior conductivity, and inherent stability, are emerging as promising candidates for next-generation capacitor technologies. This research presents a series of coal-derived porous carbon by pyrolysis using low rank lignite as raw material and KOH as activator, which are employed in symmetrical supercapacitors filled with liquid electrolytes. The physicochemical properties of the as-prepared electrode materials are characterized by means of scanning electron microscopy, X-ray diffraction, Raman spectroscopy, and their supercapacitive performance are evaluated through cyclic voltammetry and galvanostatic charge–discharge tests. The coal-based porous carbon electrode prepared at an activation temperature of 800 °C (KOH-800) exhibits a specific capacitance of 142.2 F g −1 at a current density of 1 A g −1 , and retaining 80% of its capacitance (114.0 F g −1 ) even at 10 A g −1 . The fabricated liquid supercapacitor displays a power density of 999.8 W kg −1 and an energy density of 19.4 Wh kg −1 at a current density of 1 A g −1 . Undergoing 10,000 cycles at 2 A g −1 , the supercapacitor maintains near-perfect capacitance retention and coulombic efficiency close to 100%, demonstrating its excellent durability and stability for supercapacitor applications.
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CELLULOSE
·
2024
·Vol. 31
·期 6
·3783-3796
·
IF 4.9
Yin Xuchu,Wang Yuting,Xu Zhiguang,Zhang Tao,Zhao Yan
Cellulose-based, porous materials (polyHIPEs) templated from emulsions are promising for thermal insulation, but their high susceptibility to combustion when exposed to fire hinders the materials from various applications. Here, we report the fabrication of flame-retardant, cellulose-based, thermal insulating polyHIPEs and their application for early fire warning. The polyHIPEs were synthesized from cellulose crystal-stabilized Pickering emulsions, containing ammonium salt of 1-hydroxyethylidene-1,1-diphosphonic acid as a reactive flame retardant, with or without MXene. The resulting polyHIPEs exhibited pre-designable external shapes, flexibility, robust compression, excellent thermal insulation with a thermal conductivity as low as 31.9 mW/(m·K), and high flame-retardant performance with a limit oxygen index up to 52.4% and with heat release rate and total heat release to be as low as 0.9 kJ/g and 13.7 W/g, respectively. The high thermal insulation and flame-retardant performance, combined with the responsive resistance of MXene, enabled the MXene-containing polyHIPEs to be excellent candidates for early fire warning, with warning to be realized within 3 s, with or without external power supply. Graphical abstract
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Li Bo,Liu Qi,Gong Jianqiu,Li Shuai,Zhang Chunlei,Gao Danpeng,Chen Zhongwei,Li Zhen,Wu Xin,Zhao Dan,Yu Zexin,Li Xintong,Wang Yan,Lu Haipeng,Zeng Xiao Cheng,Zhu Zonglong
Low-dimensional/three-dimensional perovskite heterojunctions have shown great potential for improving the performance of perovskite photovoltaics, but large organic cations in low-dimensional perovskites hinder charge transport and cause carrier mobility anisotropy at the heterojunction interface. Here, we report a low-dimensional/three-dimensional perovskite heterojunction that introduces strong aromatic conjugated low-dimensional perovskites in p-i-n devices to reduce the electron transport resistance crossing the perovskite/electron extraction interface. The strong aromatic conjugated π-conjugated network results in continuous energy orbits among [Pb 2 I 6 ] 2− frameworks, thereby effectively suppressing interfacial non-radiative recombination and boosting carrier extraction. Consequently, the devices achieved an improved efficiency to 25.66% (certified 25.20%), and maintained over 95% of the initial efficiency after 1200 hours and 1000 hours under ISOS-L-1I and ISOS-D-1 protocols, respectively. The chemical design of strong aromatic conjugated molecules in perovskite heterojunctions provides a promising avenue for developing efficient and stable perovskite photovoltaics.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-17
·
IF 14.7
Li Hui-Da,Chen Yuan-Qiang,Li Yan,Wei Xing,Wang Si-Yi,Cao Ying,Wang Rui,Wang Cong,Li Jing-Yue,Li Jian-Yi,Ding Hong-Ming,Yang Ting,Wang Jian-Hua,Mao Chuanbin
The effective isolation of rare target cells, such as circulating tumor cells, from whole blood is still challenging due to the lack of a capturing surface with strong target-binding affinity and non-target-cell resistance. Here we present a solution leveraging the flexibility of bacterial virus (phage) nanofibers with their sidewalls displaying target circulating tumor cell-specific aptamers and their ends tethered to magnetic beads. Such flexible phages, with low stiffness and Young’s modulus, can twist and adapt to recognize the cell receptors, energetically enhancing target cell capturing and entropically discouraging non-target cells (white blood cells) adsorption. The magnetic beads with flexible phages can isolate and count target cells with significant increase in cell affinity and reduction in non-target cell absorption compared to magnetic beads having rigid phages. This differentiates breast cancer patients and healthy donors, with impressive area under the curve (0.991) at the optimal detection threshold (>4 target cells mL −1 ). Immunostaining of captured circulating tumor cells precisely determines breast cancer subtypes with a diagnostic accuracy of 91.07%. Our study reveals the power of viral mechanical attributes in designing surfaces with superior target binding and non-target anti-fouling.
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Yuan Renxuan,Li Huizeng,Zhao Zhipeng,Li An,Xue Luanluan,Li Kaixuan,Deng Xiao,Yu Xinye,Li Rujun,Liu Quan,Song Yanlin
Numerous efforts have been devoted to harvesting sustainable energy from environment. Among the promising renewable resources, ambient heat exhibits attractive prospects due to its ubiquity and inexhaustibility, and has been converted into electricity through water evaporation-induced hydrovoltaic approaches. However, current hydrovoltaic approaches function only in low-humidity environments and continuously consume water. Herein, we fabricate a hermetic hydrovoltaic cell (HHC) to harvest ambient heat, and have fully addressed the limitations posed by environmental conditions. Meanwhile, for the first time we develop an internal circulation hydrovoltaic mechanism. Taking advantage of the heterogeneous wicking bilayer structure, we verify that inside the hermetic cell, the ambient temperature fluctuation-induced evaporation and further the water circulation can persist, which sustains the hydrovoltaic effect to convert ambient heat into electricity. More importantly, the hermetic design enables the cell to work continuously and reliably for 160 h with negligible water consumption, unaffected by external influences such as wind and light, making it an excellent candidate for extreme situations such as water-scarce deserts, highly humid tropical rain forests, rainy days, and dark underground engineering. These findings provide an easily accessible and widely applicable route for stably harnessing renewable energy, and more notably, offer a novel paradigm toward leveraging low-grade ambient heat energy via circulation design.
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