CRYSTAL RESEARCH AND TECHNOLOGY
·
2016
·Vol. 51
·期 9
·508-512
·
IF 0.908
Hai Wu,Youjin Zhang,Maozhong Zhou,Chengpeng Yao,Xianjin Ge
Large single crystals of lanthanide hydroxides [Ln(OH) 3 (Ln = La, Pr, Nd, Sm, Eu and Tb)] up to several millimeters have been grown by using solid KOH assisted hydrothermal method. Eu(OH) 3 samples, as a representative of the Ln(OH) 3 crystals, were characterized by X-ray diffraction (XRD), 4-circle single-crystal diffraction, Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). FESEM image shows hexagonal prism morphology for the Eu(OH) 3 large crystals. Research on the photoluminescence and magnetic properties of Eu(OH) 3 species was conducted.
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高影响因子
JOURNAL OF RARE EARTHS
·
2017
·
IF 2.429
Song LI,Song YE,Xiao CHEN,Tianhua LIU,Zhuang GUO,Deping WANG
Yb 3+ and Er 3+ ions co-doped NaYF 4 nanocrystals were synthesized with different amounts of NaOH via oleic acid (OA)-assisted hydrothermal process. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and photoluminescence spectra were used to characterize the products. The result indicated that the introduction of NaOH into the initial reaction solution effectively promoted the cubic (α-) to hexagonal (β-) phase transition of NaYF 4 :Yb 3+ ,Er 3+ nanocrystals, while excessive amount of NaOH favored the formation of α-NaYF 4 :Yb 3+ ,Er 3+ nanocrystals. Besides, with the increase of NaOH amount, the morphologies of β-NaYF 4 :Yb 3+ ,Er 3+ nanocrystals varied from irregular nanobranch to uniform nanorod. Further investigation revealed that the addition of NaOH could facilitate the deprotonation of OA, leading to the formation of oleate (OA − ), and meanwhile increased the concentration of OH − ions, inducing consequently the phase transition and morphology evolution of NaYF 4 :Yb 3+ ,Er 3+ nanocrystals. Moreover, the upconversion luminescence properties of NaYF 4 :Yb 3+ ,Er 3+ nanocrystals were systematically investigated. It was found that the upconversion emissions not only depended on the phase and morphology but also were influenced by the surface groups.
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高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Chengyan Wang,Yangsai Lyu,Jia Li,Li Li,Tingting Li,Jie Yang,Ningning Xing,Xiaolei Zhang
Excessive fluorine can cause a serious threat to human health. It is significant but challenging to develop a straightforward and rapid way to simultaneously detect and remove excess F– from water. Herein, we presented a three-dimensional (3D) hierarchical UiO-66-NH2 nanoparticle/γ-AlO(OH) nanowire hybrid synthesized by a facile biotemplate route for simultaneous detection and removal of F– from water. We elaborately assembled two kinds of materials in a bioinspired 3D hierarchical structure as a functional unit to achieve detection and removal of dual functions. The outer UiO-66-NH2 nanoparticles served as a fluorescent sensor to detect and capture F– via a strong fluorescence enhancement effect caused by the electron transfer from F– and γ-AlO(OH) and acted as the capture unit of F–. The inner γ-AlO(OH) nanowire layer served as a F– absorbent through ion exchange between F– and γ-AlO(OH). The resulting UiO-66-NH2 nanoparticle/γ-AlO(OH) nanowire hybrid displayed excellent selectivity and sensitivity for F– detection (the detection range was 0–5 mM and the limit of detection was as low as 0.77 μM) and high capacity for F– removal (the maximum equilibrium adsorption capacity qmax was as high as 87.0 mg g–1). This dual-function material provided a strategy for simultaneously selective sensing and efficient removal of anionic pollutants from water.
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高影响因子
ACS Nano
·
2015
·
IF 12.881
Jiaojie He,Wei Wang,Fenglian Sun,Wenxin Shi,Dianpeng Qi,Ke Wang,Ruisha Shi,Fuyi Cui,Ce Wang,Xiaodong Chen
La(OH)3 nanorods immobilized in polyacrylonitrile (PAN) nanofibers (PLNFs) were fabricated for the first time by electrospinning and a subsequent in situ surfactant-free precipitation method and then applied as a highly efficient phosphate scavenger to realize nutrient-starvation antibacteria for drinking water security. The immobilization by PAN nanofibers effectively facilitated the in situ formation of the aeolotropic and well-dispersed La(OH)3 nanostructures and, thus, rendered higher phosphate removal efficiency due to more exposed active sites for binding phosphate. The maximum phosphate capture capacity of La(OH)3 nanorods in PAN nanofibers was around 8 times that of the La(OH)3 nanocrystal fabricated by precipitation without PAN protection. Moreover, remarkably fast adsorption kinetics and high removal rate were observed toward low concentration phosphate due to the high activity of our materials, which can result in a stringent phosphate-deficient condition to kill microorganisms in water effectively. The present material is also capable of preventing sanitized water from recontamination by bacteria and keeping water biologically stable for drinking. Impressively, stabilized by PAN nanofibers, the La(OH)3 nanorods can be easily separated out after reactions and avoid leaking into water. The present development has great potential as a promising antimicrobial solution for practical drinking water security and treatment with a negligible environmental footprint.
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高影响因子
RARE METALS
·
2023
·Vol. 43
·期 3
·1263-1274
·
IF 8.8
Guo Yue,Qin Lin-Jun,Xu Jing,Jiang Xiao-Ping,Yue Xiao-Yu,Hou Yi,Shi Hao,Wang Li-Xi,Zhang Qi-Tu
Optical temperature sensing based on the fluorescence intensity ratio (FIR) of red emission for lanthanide ions holds significant relevance in non-contact temperature measurement for biological application. In this study, the perovskite-structured KZnF 3 is utilized as a host material for Er 3+ to achieve a high-purity upconversion (UC) red emission. The observed Stark splitting of the red emission peak provides evidence of the energy level splitting of Er 3+ . Group theory is employed to decompose the spectral branching of Er 3+ under the point group symmetry of KZnF 3 , allowing for the derivation of Stark splitting energy levels induced by the crystal field effect. The optical temperature-sensing behavior of the red UC luminescence was investigated, specifically examining the FIR of the splitting sub-peaks, which exhibited an exponential relationship with temperature. The KZnF 3 : Yb 3+ , Er 3+ demonstrated a relative sensitivity ( S r ) of 0.00182%·K −1 at 298 K, highlighting its excellent response to temperature. Ex vivo bio-thermometry experiments conducted on chicken breast validated the material's ability to penetrate biological tissues and showed its significant sensitivity of the FIR to temperature. These results establish KZnF 3 :Yb 3+ , Er 3+ as a promising material for optical thermometry in various biological applications. Graphic abstract
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高影响因子
Environmental Science-Nano
·
2025
·
IF 5.1
Ying Wang,Fuming Wang,Xuyang Feng,Haoyou Jiang,Hualin Zhang,Yongfang Qian,Botian Zhu,Yaping Huang,Yimin Zhu
In recent years, microbial pollution has become a serious environmental problem, and the release of microorganisms into the water environment seriously threatens human health. As environment-friendly and low-cost antibacterial agents, Mg(OH)2 nanoparticles (M-NPs) have garnered considerable attention for their small size, innocuity, no drug resistance, chemical stability and thermal stability. However, little is known about the physiological changes that bacteria undergo in the presence of M-NPs. In this work, the antibacterial mechanism of M-NPs synthesized by applying the coprecipitation method was investigated using Escherichia coli (E. coli) as a model system. The oxygen vacancies on the M-NP surface, which can produce reactive oxygen species (ROS, ·O2−, H2O2, and ·OH), were examined via O2-temperature programmed desorption (O2-TPD). Abnormality in three central metabolic pathways (energy, glucose and tricarboxylic acid cycle) induced by M-NPs was detected by analyzing the activity of respiratory chain dehydrogenase, gluconokinase (GK) and succinate dehydrogenase (SDH). The downregulated activity and gene expression levels of GK confirmed that M-NPs play an inhibitory role, and these physiological changes result in cell death. Thus, M-NPs have great potential in the field of preventing and controlling microbial pollution.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Kaiyue Yang,Pengfei Zhou,Lin Hao,Jinsheng Liang
Solar-driven photodegradation technology is a highly promising route for resolving environmental pollutants. However, the performance of photocatalysts is usually limited by the poor light harvesting, the high recombination of photogenerated electron-hole pairs, and the insufficient surface active sites. In this work, thin Bi 2 O 2 (OH)(NO 3 ) nanosheets co-modified with oxygen vacancies and bromine-grafting (BNSBr-OV) presented a superb rhodamine B photodegradation efficiency of 98.5 % within 4 h under visible light (λ＞420 nm), which was 8.2 times higher than that of pristine Bi 2 O 2 (OH)(NO 3 ). Besides, BNSBr-OV exhibited universal photocatalytic abilities of degrading various antibiotics, including tetracycline hydrochloride, ofloxacin and sodium sulfacetamide. The introduction of oxygen-vacancy and grafted bromine dual active sites can not only improve the light harvesting ability of the photocatalyst, but also promote the migration efficiency of photogenerated carriers, which boosts its photocatalysis performance. This study provides a platform for understanding the dual active sites modified single-crystal material, which potentially offers new design of environmental catalysts for multiple applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yu Tian,Xiaoru An,Xiaonan Du,Dalei Chang,Hong Li,Yue Hua,Xiuling Zhang,Jingsen Zhang,Lanbo Di
α-Co(OH) 2 has important applications in environmental, energy and catalysis applications. However, a complicated and harsh process is required for its production. Therefore, it is necessary to develop a rapid, facile, and green approach for the controllable synthesis of α-Co(OH) 2 . In this study, we successfully synthesized α-Co(OH) 2 supported on multiwalled carbon nanotubes (MWCNT) (α-Co(OH) 2 /MWCNT) by the plasma treatment of a mixture of cobalt nitrate and MWCNT in water without adding any other chemical reagents. The controllable synthesis of α-Co(OH) 2 was achieved only by adjusting the plasma conditions and support functionalization. The reduction of p -nitrophenol (4-NP) as a model using NaBH 4 was used to evaluate the performance of the obtained α-Co(OH) 2 /MWCNT catalysts. The results revealed that the sample prepared with 15 min of plasma treatment using H 2 /Ar as the working gas (α-Co(OH) 2 /MWCNT-15) had a good crystalline phase structure and showed excellent 4-NP reduction performance with a reaction rate constant as high as 1.97 min −1 . Structural characterization and electrochemical analyses of the different catalysts indicated that α-Co(OH) 2 /MWCNT-15 contains abundant defects, a large layer spacing, and abundant lattice sites for hydrogen adsorption, which are conducive to the adsorption of more active hydrogen species and 4-NP, and thus lead to significantly accelerated catalytic reduction of 4-NP.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Nian-Dan Zhao,Yan Wang,Xiao-Hang Zou,Wei-Ming Yin,Xin-Yu Wang,Yuan-Ru Guo,Qing-Jiang Pan
The utilization of renewable biomass cellulose in treating pollution of heavy metal ions (HMIs) is one of overarching and appealing strategies, because it simultaneously satisfies sustainable development and resolves ever-increasing environmental issue. In this regard, the composite cellulose@Mg(OH) 2 was prepared via a facile method and explored for its use as water treatment agent. It is demonstrated that the smaller and thinner hexagonal Mg(OH) 2 flakes are constructed onto the cellulose substrate by self-assembling; two components are chemically coupled via hydrogen bonds and Mg-O c (cellulose oxygen) dative bonds; what’s more, the coupling of cellulose with Mg(OH) 2 (1 0 1) facet is much more preferential than with (0 0 1) facet. The resultant composite material shows remarkable HMI removal performance: large capacities of 734.9, 595.8 and 1473.1 mg g −1 for Cd 2+ , Cu 2+ and Pb 2+ , respectively. Further assisted by good shaping property of the cellulose substrate, the composite is capable of being made into filter, which practically separates HMIs and purifies wastewater with high removal efficiency (99.99%) for Cd 2+ even after operating for 110 days and potable water can be obtained. The mechanism is delineated with removal models and characterizations of HMI-recovered products.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Haitao Xu,Dianhua Song,Jiao Li,Yan Zhao,Ruijie Yang,Jingzhe Zhao
The demand for sustainable energy sources urges the development of efficient and earth-abundant electrocatalysts . Herein, chlorine assisted ion-exchange and in-situ sulfurization processes were combined to construct CuCo 2 S 4 @(Cu,Co) 2 Cl(OH) 3 heterostructures from Cu(OH) 2 nanoarrays. Chlorine element in the cobalt source stimulated the formation of (Cu,Co) 2 Cl(OH) 3 precursor, and further facilitated partial transformation of the precursor to CuCo 2 S 4 on the surface to achieve composite structure. The mixed valences of Co element (Co 3+ in CuCo 2 S 4 and Co 2+ in (Cu,Co) 2 Cl(OH) 3 ) and O S interpenetrated nanointerface in the composite catalysts provided low electron transfer resistance for good alkaline oxygen evolution reaction (OER) activities. In 1 mol L −1 KOH electrolyte, the overpotentials of the optimal composite catalyst reached 253 and 290 mV respectively at the current density of 20 and 50 mA cm −2 , which is comparable to the activity of commercial Ir/C (281 mV@20 mA cm −2 ). These findings could provide opportunities for designing effective and inexpensive composite electrocatalysts through nanointerface engineering strategy.
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PubMed
高影响因子
ORGANIC ELECTRONICS
·
2018
·
IF 3.68
Kang Chen,Tiantian Cao,Ziqi Sun,Dan Wang,Ning Chen,Yongfang Li
TiO 2 is widely used in conventional n-i-p type perovskite solar cells (Pero-SCs) as electron transporting layer (ETL). However, its drawbacks such as photocatalytic properties, low electron mobility , and a process of high temperature sintering , hindered the further improvement of device performance. In this work, a vacuum-deposited fullerene C 60 was utilized as ETL, and a easily accessible fullerene derivative, C 60 (OH) 16 fullerenol, was employed between ITO electrode and C 60 ETL to modify ITO for the first time. After introducing the C 60 (OH) 16 fullerenol layer, the Pero-SC obtained the favorable energy level alignment between ITO cathode and perovskite layer, and the device based on C 60 (OH) 16 /C 60 ETL achieved a champion PCE of 16.70%, which showed a 15.41% enhancement compared to the Pero-SC with pristine C 60 ETL (14.47%). The mechanisms of performance improvement were systemically discussed with respect to the optimized energy level, efficient charge transport and reduced interfacial resistance. This work exhibited that fullerenol C 60 (OH) 16 is a promising interfacial modification material for the n-i-p type Pero-SCs.
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高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2025
·Vol. 44
·期 10
·100707
·
IF 10.3
Xiaodong Zhang,Bohui Xu,Deshuai Xiao,Xinyuan Zhang,Pifu Gong,Zheshuai Lin
Non-centrosymmetric (NCS) crystalline structures, critical for second harmonic generation (SHG) in all-solid-state lasers, are far less prevalent than their centrosymmetric (CS) counterparts. In this study, we report a structural transformation from CS to NCS configuration in benzenesulfonate derivatives via hydroxyl group incorporation, as illustrated by the transition in the newly discovered CN 3 H 6 C 6 H 5 SO 3 (CS) and CN 3 H 6 C 6 H 4 SO 3 (OH) (NCS). The introduced hydroxyl groups induce hydrogen bond reconstruction, effectively breaking the original centrosymmetry. The resulting NCS compound exhibits remarkable nonlinear optical (NLO) properties, including a strong SHG response (1.6 × KDP with the particle sizes of 200–250 μm), a wide bandgap (UV cutoff at 290 nm, corresponding band gap is 4.37 eV), and a large birefringence (0.21@1064 nm), demonstrating excellent potential as an UV NLO crystal material.
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高影响因子
危险品化学品经营许可证（带存储）