JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·Vol. 333
·期 4
·2069-2080
·
IF 1.5
Gong Mi,Zhou Xiayu,Yang Xinxu,Grimes Craig A.,Tang Ziwei,Yang Shengyuan,Wang Yue,Xiong Lihao,Song Jiayi,Li Le,Zhen Deshuai
Presented is an infrared-induced sensor constructed of upconversion nanoparticles and DNAzyme for ultra-sensitive, and rapid detection of uranyl ions. The detection method eliminates the use of chemically labeled nucleic acid probes, possesses high selectivity, and a uranyl detection limit of 39 nM. The technique is successfully applied to the detection of uranyl in various water samples as well as human serum, illustrating the excellent sensitivity and specificity of the quantification platform.
研究领域:
分析化学
·
环境科学
·
生物化学
·
纳米技术
·
传感器
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DOI
高影响因子
Nano Research
·
2023
·Vol. 17
·期 3
·1173-1181
·
IF 9.9
Liu Kang,Wu Tong,Xu Luying,Zhang Zhuangzhuang,Liu Zhiyu,Wang Longfei,Wang Zhong Lin
The separation of photogenerated electron–hole pairs is vitally important for photocatalysis, which can be effectively promoted by polarization field. However, it only manifests in piezoelectric/pyroelectric/ferroelectric materials that have a non-centrosymmetric structure. Here, we demonstrate that the polarization enhanced photocatalysis (with wide spectra from ultraviolet (UV) light to visible light) can be achieved in centrosymmetric semiconductors, such as δ-MnO 2 and TiO 2 nanosheets integrated nanoflowers, by using the strain-gradient-induced flexoelectric polarization that is always overlooked in polarization-enhanced catalysis. Under ultrasonic and illumination excitation, the organic pollutants (methylene blue (MB), etc.) can be effectively degraded within 30 min with excellent stability and repeatability. Compared with photocatalysis, the flexo-photocatalytic performance of above centrosymmetric semiconductors is substantially increased by 85%. Moreover, the factors related to flexo-photocatalysis such as material morphology, mechanical stimuli source, and adsorption are explored to deeply understand the mechanism of flexo-photocatalysis. This work opens up a way for high-performance photocatalysis in centrosymmetric semiconductors.
研究领域:
光催化
·
材料科学
·
半导体物理
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纳米技术
·
环境科学
✓ 已验证
DOI
高影响因子
IONICS
·
2023
·Vol. 30
·期 2
·697-708
·
IF 2.8
Wang Guanzheng,Lei Huazhi,Wang Zheng,Yuan Zhentao,Zhan Zhaolin,Li Lu,Wang Xiao
Amorphous GeO 2 @C anode materials were successfully prepared from commercial GeO 2 and C 6 H 12 O 6 .H 2 O by a hydrothermal method combined with sintering under nitrogen atmosphere protection. The anode materials showed an ideal spherical shape of about 3 μm and their surface was uniformly covered with C. GeO 2 @C composite anodes exhibited better storage performance for Li-ion batteries. The discharge-specific capacities of GeO 2 @C-3 sample were 1143, 1049, 776, 551, and 308 mAh g -1 at current densities of 0.2, 0.5, 1, 2, and 5 A g -1 , and restored to 1136 mAh g -1 when the current density returned to 0.2 A g -1 . The reversible specific capacity was 756 mAhg -1 after 1000 cycles at a current density of 1 A g -1 . The GeO 2 @C anode was stable in the process of charge and discharge, and no obvious pulverization occurred. GeO 2 @C composites stabilized the electrochemical properties through carbon and amorphous structure to improve the overall electrical conductivity in Li + embedding/de-embedding processes.
研究领域:
材料科学
·
电化学
·
纳米技术
·
储能
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 41
·16105-16118
·
IF 4.5
Wang Shi,Dang Chenyang,Li Mengli,Gu Li,Wu Jun,Cao Xuebo
Efficiently harnessing abundant and renewable solar energy for sustainable and continuous municipal sewage or industrial outlet water treatment to deal with water crisis has been an urgency for researchers in the past decades. Herein, a scalable and cost-effective solar steam device built up of surface-carbonized cane (CC) and Bi 2 WO 6 nanoflower photocatalyst is demonstrated, which exhibits high efficiency for concurrent waste water treatment and solar-to-water evaporation. CC is chosen as artificial core component in this system due to its nature-made periodic micro-/nanochannels, low heat conductivity, which contributes to extraordinary water transport, evaporation capacity and thermal management. Compared to natural cane, CC exhibits remarkably enhanced light absorption capacity and solar-to-water evaporation efficiency. Moreover, through the modification of Bi 2 WO 6 nanoflower, the system shows an optimized utilization of absorbed photons for high redox charge carriers in photocatalytic degradation and heat generation to promote the water treatment, leading to enhanced pollutant degradation efficiency. The steam generation performance reaches up to 1.417 kg·m −2 ·h −1 and solar-to-water evaporation efficiency of ~ 91.7% under 1 sun irradiation, which are among the highest values in the literatures. Continuous water purification and freshwater production from municipal sewage are also carried out in a home-made tandem system. Graphical abstract
研究领域:
环境科学
·
材料工程
·
可再生能源
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光催化
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水净化技术
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DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2024
·Vol. 32
·期 7
·3326-3341
·
IF 4.7
Wang Rui,Song Xin,Liu Li,Zhou Chao,Wu Guangfeng
Magnetic particles with active groups on their surfaces can be applied to wastewater purification to remove harmful ions, but the insufficient number of active groups on their surfaces tends to limit their removal rate of ions. Herein, we grafted different generations of dendritic macromolecular polyamidoamine (PAMAM) onto the magnetic chitosan microspheres (MCS) using ethylenediamine tetraacetic acid (EDTA) as core (MCEPs) for the removal of Cu (II). Firstly, 7 μm-sized MCS with good dispersibility was prepared by adjusting conditions such as glacial acetic acid content, emulsifier content and raw material ratio. Secondly, the effect of MCEPs generation, pH and contact time on the adsorption capacity were investigated. The adsorption experiments showed that the MCEPs had a high adsorption capacity, when the adsorbent was the second generation of MCEP (MCEP G2.0), the maximum adsorption capacity can up to 702.9 mg/g and the adsorption process can be completed in 60 min. Moreover, among various isotherms models, MCEP G2.0 was well-fitted by Langmuir adsorption isotherm. Also, adsorption kinetic studies proved that the adsorption mechanism of MCEP G2.0 adsorbent followed the pseudo-second-order kinetic model, demonstrating that the process was chemisorption. The adsorbent has renewability as well, after five adsorption cycles, its adsorption efficiency was still higher than 80%. Therefore, the adsorbent showed a superior adsorption capacity and renewability to remove Cu (II). Graphical
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
Frontiers of Materials Science
·
2023
·Vol. 17
·期 3
·1-12
·
IF 2.7
Kang Min,Cheng Yizhu,Hu Yinchun,Ding Huixiu,Yang Hui,Wei Yan,Huang Di
Autonomous self-healing hydrogels were achieved through a dynamic combination of hydrogen bonding and ferric ion (Fe 3+ ) migration. N,N ′-methylenebis (acrylamide) (MBA), a cross-linking agent, was added in this study. Poly(acrylic acid) (PAA)/Fe 3+ and PAA–MBA/Fe 3+ hydrogels were prepared by introducing Fe 3+ into the PAA hydrogel network. The ionic bonds were formed between Fe 3+ ions and carboxyl groups. The microstructure, mechanical properties, and composition of hydrogels were characterized by field emission scanning electron microscopy and Fourier transform infrared spectroscopy. The experimental results showed that PAA/Fe 3+ and PAA–MBA/Fe 3+ hydrogels healed themselves without external stimuli. The PAA/Fe 3+ hydrogel exhibited good mechanical properties, i.e., the tensile strength of 50 kPa, the breaking elongation of 750%, and the self-healing efficiency of 82%. Meanwhile, the PAA–MBA/Fe 3+ hydrogel had a tensile strength of 120 kPa. These fabricated hydrogels are biocompatible, which may have promising applications in cartilage tissue engineering.
研究领域:
材料科学
·
生物医学工程
·
高分子科学
·
组织工程
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DOI
高影响因子
Nano Research
·
2024
·Vol. 17
·期 6
·4815-4824
·
IF 9.5
You Xingchao,Xu Jiawei,Zhuang Zechao,Xia Junkai,Wang Suwen,Wei Haiyan,Li Yongfu,Cai Yanjiang,Xiang Hai,Yu Bing
Developing electrocatalysts that exhibit both high activity and ammonia selectivity for nitrate reduction is a significant and demanding challenge, primarily due to the complex nature of the multiple-electron reduction process involved. An encouraging approach involves coupling highly active precious metals with transition metals to enhance catalytic performance through synergy. Here, we report a ruthenium-nickel alloy catalyst with nanosheets (Ru-Ni NSs) structure that achieves a remarkable ammonia Faradaic efficiency of approximately 95.93%, alongside a yield rate of up to 6.11 g·h −1 ·cm −2 . Moreover, the prepared Ru-Ni NSs exhibit exceptional stability during continuous nitrate reduction in a flow reactor for 100 h, maintaining a Faradaic efficiency of approximately 90% and an ammonia yield of 37.4 mg·L −1 ·h −1 using 0.05 M nitrate alkaline electrolyte. Mechanistic studies reveal that the catalytic process follows a two-step pathway, in which HONO serves as a migration intermediate. The presence of a partially oxidized Ru (002) surface enhances the adsorption of nitrate and facilitates the release of the migration intermediate by adjusting the strength of the electrostatic and covalent interactions between the adsorbate and the surface, respectively. On the other hand, the Ni (111) surface promotes the utilization of the migration intermediate and requires less energy for NH 3 desorption. This tandem process contributes to a high catalytic activity of Ru-Ni NSs towards nitrate reduction.
研究领域:
电化学
·
催化
·
纳米材料
·
环境化学
·
能量转换
·
材料科学
✓ 已验证
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2024
·Vol. 416
·期 10
·2541-2551
·
IF 3.8
Niu Yanyan,Chen Yuxue,Zhou Juan,Sun Wei
In this study, an online electrochemistry coupling high-performance liquid chromatography-mass spectrometry (EC-HPLC-MS) technology has been developed for simulating metabolic reactions and rapid analysis of metabolites of flavone, quercetin, and rutin, which are not only widely present compounds with pharmacological activity in nature, but also have structural similarity and variability. The simulated metabolic processes of the substrates (phase I and phase II metabolism) were implemented on the surface of glassy carbon electrode (GCE) by using different electrochemical methods. After online chromatographic separation, the products were transmitted to a mass spectrometer for detection, in order to speculate relevant reaction pathways and structural information of the reaction product. The main metabolites, including methylation, hydroxylation, hydrolysis, and conjugation reaction products, had been successfully identified through the designed in situ hyphenated technique. Furthermore, compared with metabolites produced by in vitro incubation of rat liver microsomes, it was found that the products of electrochemical simulated metabolism were more abundant with diverse metabolic pathways. The results indicated that the proposed method exhibited advantages in the sample pretreatment process and detection cycle without compromising the reliability and accuracy of the results. Graphical
研究领域:
分析化学
·
药物化学
·
电化学
·
代谢组学
·
生物分析化学
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
·
2023
·Vol. 20
·期 6
·1963-1976
·
IF 2.3
Niu Pengfei,Pan Weichen,Wang Wei,Wang Meng,Zhang Bao,Yang Junfeng,Peng Xiaohong
Self-matting waterborne polyurethane (WPU) with a rough surface suffers from poor wear resistance, which inevitably hinders its service span. Here, wear-resistant and self-matting WPU resin was prepared via using hydroxypropyl-terminated polydimethylsiloxane (PDMS) in the preparation of prepolymer and N -2-aminoethyl-3-aminopropyltrimethoxysilane (KH-792) as a post-chain extender. The effects of PDMS, 2, 2-Bis(hydroxymethyl)propionic acid (DMPA), and KH-792 on its morphology, particle size, gloss, wear resistance, and hydrophilicity of WPU were also investigated. The gloss of WPU coatings was found to be negatively correlated with the amount of DMPA. Moreover, the matting effect and the wear resistance of WPU were significantly enhanced by the introduction of PDMS and KH-792. When the content of PDMS, DMPA, and KH-792 was 6 wt%, 2.2 wt%, and 40 mol% respectively, the gloss was 3.2 GU, and the wear mass loss was only 6.6 mg, which was 64% lower than that without silicone-modified. This work could provide a new idea for the preparation of wear-resistant and self-matting coatings.
研究领域:
材料科学
·
高分子化学
·
表面工程
·
涂层技术
✓ 已验证
DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2023
·Vol. 18
·期 3
·1-10
·
IF 6.4
Zhang Yuyao,Jia Litao,Zhao Jin,Liu Xuming,Dong Shuyu,Liu Chuanyang,Cui Yuanyuan
The feasibility of simultaneous water recovery, salt separation and effective descaling of hypersaline brine was investigated by diisopropylamine (DIPA)-based directional solvent extraction (DSE), using diluted/concentrated seawater with initial saline concentration range of 12–237 g/L at extraction temperatures of 5 and 15 °C, respectively. The water recovery shows an obvious boundary at saline concentration of 115 g/L under dual effect of specific water extraction efficiency and extraction cycles. High Cl − ion concentration in product water is in sharp contrast to the nearly complete removal of SO 4 2− and hardness ions, indicating that DIPA-based DSE process indeed achieved efficient separation and purification of Cl − ion from hypersaline brines. Especially, the radical precipitation of Mg 2+ and Ca 2+ ions in form of Mg(OH) 2 and CaCO 3 demonstrates effective descaling potential, although it leads to more DIPA residues in dewatered raffinate than product water. Moreover, an exponential correlation between the Cl − removal efficiency and specific water extraction efficiency further reveals the intrinsic relationship of water extraction process and transfer of Cl − ion to the product water. Overall, the study provides a novel approach for integrating the water recovery and separation of Cl − ion from ultra-high-salinity brines with radical precipitation of Mg 2+ and Ca 2+ ions in one step.
研究领域:
化学工程
·
环境科学
·
分离技术
·
水处理
·
海水淡化
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DOI
高影响因子
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
·
2023
·Vol. 111
·期 3
·1-8
·
IF 2.7
Hu Xin,Zheng Fengmian,Yin Li,Huang Heyong,Li Shiyin
Colloidal particles, mixture with continuous molecular weight distribution and multiple organic components, is widespread in lake and have significant impact on the retention, migration, transportation, and fate of contaminants in lake ecosystems. Here we extract sedimentary colloids from algal growth dominant area (AD) in Taihu Lake and further separated into four different particle size ranges by cross-flow ultra-filtration (CFUF). The interaction mechanism between colloids and Microcystin-LR (MC-LR) was investigated under different cation conditions by dialysis equilibrium experiment method. Adsorption kinetics research shows the adsorption of MC-LR by colloids follows second-order kinetics and can be simulated by Freundlich isotherms. The effects of different cations on colloids-MC-LR interaction shows the addition of Mg(II) decreased colloids-MC-LR interaction, while Cu(II) increased colloids-MC-LR binding. MC-LR also increased Cu(II) binding to colloids, while MC-LR decreased Mg(II) binding. Therefore, different effect of cations to colloids-MC-LR interaction was proposed.
研究领域:
环境化学
·
胶体与界面科学
·
毒理学
·
水生态学
·
分析化学
✓ 已验证
DOI
高影响因子
Nano Research
·
2024
·Vol. 17
·期 6
·4924-4933
·
IF 9.5
Fan Yu,Yi Yu,Rong Hongpan,Zhang Jiatao
Carbon-based single-atom catalysts (SACs) have been widely studied in the field of biomedicine due to their excellent catalytic performance. However, carbon-based SACs usually aggregate during pyrolysis, which leads to the reduction of catalytic activity. Here, we describe a method to improve the monodispersion of SACs using silicon dioxide as a protective layer. The decoration of silicon dioxide serves as a buffer layer for individual nanoparticles, which is not destroyed during the pyrolysis process, ensuring the single-particle dispersion of the nanoparticles after etching. This approach increased the hydroxyl groups on the surface of Fe-SAC (Fe-SAC-SE) and improved its water solubility, resulting in a four times enhancement of the peroxidase (POD)-like activity of Fe-SAC-SE (58.4 U/mg) than that of non-protected SACs (13.9 U/mg). The SiO 2 -protection approach could also improve the catalytic activities of SACs with other metals such as Mn, Co, Ni, and Cu, indicating its generality for SACs preparation. Taking advantage of the high POD-like activity, photothermal properties, and large specific surface area of Fe-SAC-SE, we constructed a synergistic therapeutic system (Fe-SAC-SE@DOX@PEG) for combining the photothermal therapy, catalytic therapy, and chemotherapy. It was verified that the photothermal properties of Fe-SAC-SE@DOX@PEG could effectively improve its POD-like activity, exhibiting excellent tumor-killing performance at the cellular level. This work may provide a general approach to improve the performances of SACs for disease therapy and diagnosis.
研究领域:
生物医学工程
·
纳米技术
·
催化
·
材料科学
·
肿瘤学
·
诊疗学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）