ACS Sensors
·
2023
·
IF 8.9
Fan Zhao,Wei Cao,Pu-Hong Wang,Jingfeng Wang,Lingmin Yu,Zhihong Qiao,Zhi-Jun Ding
In2O3 is an optimal material for sensitive detection of carbon monoxide (CO) gas due to its low resistivity and high catalytic activity. Yet, the gas response dynamics between the CO gas molecules and the surface of In2O3 is limited by its solid structure, resulting in a weak gas response value and sluggish electron transport. Herein, we report a strategy to synthesize porous In2O3/Fe2O3 core–shell nanotubes derived from In/Fe bimetallic organic frameworks. The fabricated porous In2O3/Fe2O3-4 core–shell nanotubes present outstanding gas sensitivities, including a response value 3.8 times (33.7 to 200 ppm CO at 260 °C) higher than that of monometallic-derived In2O3 (8.7), ultrashort response and recovery times (23/76 s) to 200 ppm CO, low detection limit (1 ppm), promising selectivity, and long-term stability. The enhanced sensing mechanisms are clarified by the combination of experiment and first-principles calculations, showing that the synergetic strategy of higher adsorption energy, increased electrical conductivity, higher electron transfer numbers, and larger specific surface area of porous core–shell structures promotes the surface activity and charge transfer efficiency. The present work paves a way to tune gas-sensing materials with special morphologies for the development of high-performance CO sensors.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 20
·9270-9279
·
IF 7.79
Yuanyuan Dong,Chenxing Xu,Lei Zhang
Herein, we reported a label-free and reliable photoelectrochemical (PEC) platform for highly selective monitoring of norepinephrine (NE) based on metallic Bi nanoparticles anchored on hollow porous ZnSnO3 microspheres (3D Bi/ZnSnO3) via a simple solvothermal strategy. The designed 3D Bi/ZnSnO3 Schottky junction exhibited a unique photoanodic response toward NE among other catechol derivatives, such as epinephrine (EP) and dopamine (DA), and effectively shielded the interference from thirteen coexisting biomolecules like uric acid (UA) and ascorbic acid (AA). High selectivity and excellent sensitivity could be correlated to the unique chelating coordination interaction between NE and Zn2+ at surface sites as well as the efficient carrier separation of Bi/ZnSnO3, thereby developing a novel “signal-on” label-free and selective strategy for NE detection. The proposed Bi/ZnSnO3-based PEC sensor achieved remarkable NE biosensing with a low detection limit of 0.68 nmol L−1 and a wide response ranging from 0.002 to 350.0 μmol L−1. The applicability of this biosensor was realized for the selective analysis of NE in human serum, human urine and injection samples, laying the foundation for the label-free PEC monitoring of NE in biological fluids.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2021
·Vol. 9
·期 24
·2101333
·
IF 9.926
Kunjie Liu,Chenkai Deng,Chunxiao Li,Xusheng Zhang,Jindong Cao,Jiyong Yao,Jing Zhao,Xingxing Jiang,Zheshuai Lin,Quanlin Liu
Organic–inorganic metal halides (OIMHs) with unique structural flexibility possess excellent photoelectric properties. They are regarded as next-generation photovoltaic materials, phosphors, semiconductors, and ferroelectrics. The metal-halide units in OIMHs are good microscopic building blocks of nonlinear optical crystals for laser wavelength conversion. However, most OIMHs are absent from nonlinear optics owing to their macroscopic nonlinear optical (NLO)-inactive centrosymmetric crystal structure. In this study, two new lead-free OIMHs, (TMEDA)SbI 5 and (TMEDA)BiI 5 (where TMEDA 2+ is N , N , N ′-trimethylethylenediammonium), having 1D structure, crystallized in the orthorhombic system with a non-centrosymmetric P 2 1 2 1 2 1 space group, are synthesized. Remarkably, upon 2090 nm laser irradiation, both compounds possess a strong infrared (IR) nonlinear optical response of the same magnitude as AgGaS 2 , which is a benchmark semiconductor-type nonlinear optical crystal. In addition, under the excitation of ultraviolet and visible lights, both compounds produce self-trapped exciton-induced red-light emission. First-principles electronic structure calculations reveal that the optical properties originate from the electronic transitions within the inorganic metal-halide group. The obtained results indicate that both compounds are potential photoelectric materials for laser frequency conversion and fluorescence, and the observation of NLO effect in these two compounds verifies that OIMHs are also good candidates for NLO crystals.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2021
·
IF 7.991
Weiwei Lan,Mengjie Xu,Miao Qin,Yizhu Cheng,Ya Zhao,Di Huang,Xiaochun Wei,Yongchang Guo,Weiyi Chen
Osteochondral defect regeneration was a great challenge because of limited self-repaired ability for its sophisticated hierarchical inner structure. Hereon, the bi-layer hydrogel with robust osteochondral interfacial bonding was formulated under fully physical crosslinking, which was consisted of polyvinyl alcohol/collagen II for cartilage layer and polyvinyl alcohol/biphasic calcium phosphate/carbon nanotubes for bone layer. The bi-layer hydrogel with irregular pore distribution showed decreased pore size from top to bottom. The tensile modulus of bi-layer hydrogel reached to 7.14 ± 3 MPa and the stretched fracture surfaces were always appeared in the upper hydrogels, proving bi-layer hydrogels' well interfacial bonding strength. Furthermore, hydrogels' biocompatibility was evaluated using two kinds of cells in vitro, and the repair performance was also assessed in vivo test. The results demonstrated the bi-layer hydrogel owned favorable cytocompatibility and could induce the formation of osteochondral regeneration. Additionally, the max load at defect section reached to 67.24 ± 36.06 N after 12 weeks regeneration, verifying well bonding strength between the neotissue and native adjacent tissues. This work revealed the favorable bi-layer hydrogel owed great potential in repairing osteochondral defects.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Daixiong Zhang,Qing Xiang
In this work, a Sn-Bi film was successfully fabricated via the electrophoretic deposition (EPD) of nano-Sn powders and nano-Bi powders in an ethanol dispersion medium. Study on film composition showed that a coefficient of proportionality between the mass ratio in the deposited film and that in the suspension was observed for the EPD of Sn-Bi, which controlled the composition of the Sn-Bi film. Therefore, Sn-Bi films with different mass ratios were designed with this linear relationship for the codetection of Cd(II) and Pb(II). Square-wave anodic stripping voltammetry (SWASV) measurements using an in-situ plating strategy were performed after the electrochemical oxidation of Sn and Bi at 0.3 V for 120 s, and the results indicated that the Sn-Bi film with a mass ratio of 0.75 had the best determination ability.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 14
·50165
·
IF 2.52
Junjun Zhang,Huajun Duan,Jianfan Cao,Jiahao Zou,Huiru Ma
A high-efficiency DOPO-based reactive flame retardant (DPE) with bi-hydroxyl was successfully synthesized via reacting DOPO with imine obtained from the condensation of ethanolamine and 1,4-phthalaldehyde, and used as co-curing agent to improve the fire safety of epoxy resin (EP). Its chemical structure was characterized by Fourier transform infrared (FTIR) spectra, 1 H, 31 P nuclear magnetic resonance (NMR) spectra and elemental analysis. The curing behavior, thermal properties, flame-retardant properties of EP/DPE systems were investigated. The results revealed that DPE slightly decreased the glass transition temperature ( T g ), but accelerated the curing cross-linking reaction of EP. Furthermore, DPE decreased thermal degradation rate of epoxy matrix and promoted the formation of residual char at high temperature. After adding DPE, the flame retardant of epoxy thermosets was greatly improved. Especially, the thermoset modified with 5 wt% DPE achieved limiting oxygen index (LOI) value of 33.6% and V-0 rating in UL-94 test, demonstrating the highly efficient flame retardancy. While its peak heat release rate (PHRR), total heat release (THR) and total smoke production (TSP) were respectively decreased by 32.6%, 17.8%, and 13.9% compared with neat EP. Moreover, the research on flame retardant mechanism disclosed that DPE played dual flame-retardant effect in the gaseous and condensed phases.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 38
·13405-13414
·
IF 7.059
Zhi-Gang Liu,Zhen-Hua Tang,Song-Cheng Hu,Di-Jie Yao,Fei Sun,De-Yang Chen,Xiao-Bin Guo,Qiu-Xiang Liu,Yan-Ping Jiang,Xin-Gui Tang
Progress in energy storage ceramics for applications has been of interest owing to their clean green nature and excellent ferroelectric/dielectric performances. In this study, lead-free Sm-doped 0.95BaTiO3–0.05Bi(Mg0.5Ti0.5)O3 (BT–BMT–xSm) relaxor ferroelectric ceramics were synthesized and confirmed to be an appropriate material for storage devices. After the introduction of Sm2O3 into BT–BMT ceramics, their hysteresis loops gradually shrank and became slender, which is beneficial to achieving high efficiency energy storage in ceramic capacitors. The maximum recoverable energy density for the BT–BMT–xSm (x = 0.03) sample reached 3.86 J cm−3 at normal temperature, and its corresponding energy efficiency reached 81.6%. Moreover, it was found from impedance spectroscopy that the breakdown field strength is related to the oxygen defect content in the samples. Ceramic samples with fewer defects have better insulation performance, which means that a high breakdown field strength will be obtained. With proper doping, enhanced relaxor behaviour and breakdown field strength were obtained to achieve excellent energy storage properties.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 22
·7322-7329
·
IF 7.059
Da Chen,Fulong Dai,Shiqiang Hao,Guojun Zhou,Quanlin Liu,Christopher Wolverton,Jing Zhao,Zhiguo Xia
Organic–inorganic hybrid metal halides have received extensive attention owing to their versatile structures and optoelectronic properties. Herein, we report two lead-free metal halides, (PMA)3BiBr6 and (PMA)3SbBr6 [PMA+: (C6H5CH2NH3)+, as the abbreviation of phenylmethylammonium], which possess iso-structural zero-dimensional structures and crystallize in the monoclinic space group P21/c. (PMA)3BiBr6 and (PMA)3SbBr6 exhibit optical band gaps of ∼3.50 and 3.40 eV, respectively, and density functional theory calculations reveal their indirect bandgap behaviors. Upon 350 and 425 nm excitation, (PMA)3BiBr6 and (PMA)3SbBr6 exhibit broadband emission peaking at 510 nm and 625 nm with wide full-widths at half-maximum of ∼153 and 175 nm, respectively. The emission mechanism of the metal halides is attributed to self-trapped exciton emission. The relationship between the crystal structure and luminescence intensity is also discussed. Finally, both metal halides have high decomposition temperatures and are stable for long-term storage under ambient conditions, demonstrating their potential for optoelectronic applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Junfang Cheng,Ziling Wang,Lu Zou,Ming Zhang,Guozhu Zhang,Yabin Dong,Yuexing Jiang,Yizhen Huang,Naotoshi Nakashima,Bo Chi
Perovskite oxides with low cost and high catalytic activity are reported as suitable cathode catalysts for the Li–O 2 batteries (LOBs), while their catalytic mechanism is not yet fully clarified. Herein, La 0.8 Sr 0.2 Co 0.8 Ni 0.2 O 3-δ (LSCN8282) perovskite oxide is used as a cathode catalyst for the LOBs and further improved by adjusting the Co/Ni ratio in the B-site. Thus, La 0.8 Sr 0.2 Co 0.6 Ni 0.4 O 3-δ (LSCN8264) and La 0.8 Sr 0.2 Co 0.4 Ni 0.6 O 3-δ (LSCN8246) are also synthesized and used as cathode catalysts for the LOBs. Among the obtained perovskite catalysts in this study, LSCN8264 shows the highest electrochemical activity in 1 M KOH and best catalytic effectivity when used in the LOBs. The catalytic mechanism and doping optimization are clarified by analyzing the morphology of the discharge products and the X-ray photoelectron spectroscopy (XPS) of the perovskite oxides.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL ENGINEERING SCIENCE
·
2020
·Vol. 37
·期 1
·64-77
·
IF 1.681
Yuxiang Yan,Hua Yang,Zao Yi,Xiangxian Wang,Ruishan Li,Tao Xian
In this work, we have adopted a coprecipitation method to synthesize BiOBr nanoplates with diameter of 150–450 nm and thickness of 40–80 nm, and then created Bi nanowires (diameter: 6 nm) on their surface through a NaBH4 reduction method. Evolution of Bi nanowires was systematically investigated by varying the concentration of NaBH4 solution and reaction time. It is demonstrated that with increasing the NaBH4 concentration (2 h reaction), Bi nanowires are gradually evolved from BiOBr crystals, and in particular treatment by 110 mM NaBH4 solution leads to the complete evolution of BiOBr nanoplates to Bi nanowires. At a low-concentration NaBH4 solution (30 mM), BiOBr crystals are partially reduced to Bi nanowires with increasing reaction time, and then the Bi nanowires are recrystallized into BiOBr nanowires/nanoparticles on the surface of BiOBr nanoplates. At a high-concentration NaBH4 solution (110 mM), BiOBr nanoplates are easily reduced to Bi nanowires with a short reaction time, and further prolonging the reaction time leads to the gradual transformation of Bi nanowires into Bi4O5Br2 nanoparticles/nanowires. Photocatalytic performances of the samples were evaluated by eliminating rhodamine B from aqueous solution under simulated sunlight illumination. It is demonstrated that the creation of Bi nanowires (an appropriate content) on the surface of BiOBr nanoplates can produce excellent Bi@BiOBr composite photocatalysts with enhanced photodegradation performances. The underlying enhanced photocatalytic mechanism was investigated and discussed.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 8
·082504
·
IF 4.316
Shangkun Deng,Ziliang Li,Kang Xu,Zhu Liu,Zhuangzhuang Yin,Hai Yu,Jianguo Lv,Lei Yang,Zhaoqi Sun,Miao Zhang
In this paper, the electrocatalytic efficiency of bi-metallic organic framework compounds grown on nickel foam (NF) has been enhanced by adjusting the amount of iron and cobalt precursors. A unique wedge-like morphology was observed in Fe-1-Co-1-MOF. The optimized Fe-1-Co-1-MOF (1:1 of molar ratio of iron to cobalt) exhibits superior catalytic activity to oxygen evolution reaction (OER) performance with a lowest overpotential of only 233 mV at a current density of 10 mA·cm−2 and the higher current density of 400 mA·cm−2 can be provided at overpotential of 264 mV. The Tafel slope in alkaline aqueous solutions was 24.4 mV·dec−1. After 10 h of continuous operation, the catalyst showed only a slight loss of current density at 50 mA·cm−2. This success may be attributed to synergy between the bi-metallic organic framework catalyst and the large pores of conductive nickel foam, as well as the synergistic effect between the two phases molecules of the bi-metallic organic framework metal.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zong Li,Yujie Feng,Yunfei Li,Xuepeng Chen,Nan Li,Weihua He,Jia Liu
CO 2 electrochemical reduction (CO 2 ER) can convert CO 2 into value-added liquid fuel, which can not only mitigate the global warming problem caused by CO 2 , but also can be used for energy storage in the form of intermittent renewable energy. High-performance catalysts are required in order to efficiently conduct electrochemical carbon dioxide reduction under mild conditions. In this work, the bimetallic bismuth and tin were deposited on the copper mesh via a simple and speedy electrodeposition strategy and assessed as electrocatalysts for the conversion of CO 2 to formate. The Bi 5 Sn 60 electrode (bismuth deposition time of 5 min, tin deposition time of 60 min) exhibited an excellent catalytic activity with a remarkably high Faradaic efficiency of 94.8% and partial current density of 34.0 mA cm −2 at − 1.0 V vs RHE. More intriguingly, it exhibited a remarkable formate production rate of 634.3 μmol cm −2 h −1 that outperformed most of the reported electrocatalysts. The pine needle-shaped dendritic structures could provide a considerable surface area and massive active sites. The fast electron transfer was of great benefit to the formation of CO 2 • − intermediate. The metal oxide/metal metastable interface was conducive to stabilizing the CO 2 • − intermediate and inhibiting the hydrogen evolution reaction (HER) process. Moreover, the optimized electronic structure strengthened the pathway related to the OCHO • intermediate, thereby boosted the conversion of CO 2 to formate. The results demonstrated that the dendrite structured Bi/Sn bimetallic catalysts would be a promising candidate for high-efficiency CO 2 reduction.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）