SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Xiaoning Meng,Mingshu Bi,Qiuping Xiao,Wei Gao
With the emergence of hydrogen economy worldwide and the increase of safety problems caused by the highly flammable and explosive characteristics of hydrogen (H 2 ), it is urgent to develop the portable sensors that can sensitively and quickly detect H 2 leaks. In this work, the H 2 sensing characteristics of Pd/SnS 2 /SnO 2 nanocomposites synthesized via hydrothermal route as well as impregnation route were systematically investigated for the first time. The influence of different SnS 2 and Pd loading on the H 2 sensing performances of SnO 2 nanoparticles was revealed by varying the addition levels of thiourea and palladium chloride. The H 2 sensing experimental results demonstrated that SnS 2 and Pd modification can greatly enhance the sensing capabilities of SnO 2 , where 1.0 at% Pd/SnS 2 /SnO 2 sensor exhibited high response (95) and rapid response/recovery time (1/9 s) to 500 ppm H 2 at 300 ℃, thus outperforming the current reported sensing performances of SnO 2 -based H 2 sensors. The superior sensing characteristics of Pd/SnS 2 /SnO 2 were attributed to the simultaneous synergistic effect of the three components. This study will supply a rational strategy for designing high sensitive and rapid response H 2 sensors.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Guofu Li,Guoqiang Xie,Di Chen,Chong Gong,Xing Chen,Qian Zhang,Beili Pang,Yingchao Zhang,Chengjie Li,Jing Hu,Yingjie Chen,Liyan Yu,Lifeng Dong
The rational design and controllable synthesis of metal–carbon composites as low cost and efficient catalysts have become the focus of research on non-enzymatic glucose detection. Herein, nickel sulfide nanocrystals encapsulated/dispersed by bamboo-like nitrogen-doped carbon nanotubes (Ni 3 S 2 @NCNT) are facilely synthesized by pyrolysis and sulfuration of Ni 2+ -dicyandiamide complex. During the pyrolysis, nickel nanoparticles are formed to promote the growth of NCNTs, while the NCNTs can disperse Ni nanoparticles to prevent them from oxidation and aggregations. The synergistic effects between Ni 3 S 2 active sites and NCNTs also facilitate electronic transfer and enhance catalytic performances. Thus, Ni 3 S 2 @NCNT demonstrates excellent performances on glucose oxidation with unprecedented sensitivity (1447.64 μA mM −1 cm −2 ), low detection limit (0.14 μM), and wide linear range (0.46 μM-3.19 mM). Furthermore, as-fabricated sensors with superior performances indicate promising application prospects on non-enzymatic glucose detection in artificial sweat. This study will provide a general strategy for the controllable fabrication of catalysts with similar structures for other applications.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
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IF 10.319
Xiaofang Liu,Hengyang Wang,Bin Zhang,Sikang Zheng,Yao Chen,Hong Zhang,Xianhua Chen,Guoyu Wang,Xiaoyuan Zhou,Guang Han
SnSe, possessing strong lattice anharmonicity and structural anisotropy, has attracted massive attention in thermoelectric conversion. Herein, we demonstrate that simultaneously optimized electrical and thermal transport properties are achieved in SnS 2 -alloyed SnSe polycrystalline materials , which were fabricated via sintering the mixture of solution-synthesized SnSe microplates and SnS 2 nanoplates. Resulting from the increased carrier concentration, p-type (SnSe) 1– x (SnS 2 ) x ( x = 0.5%, 1%) samples obtain much-improved power factor between 300 K and 373 K, e.g. 0.72 mW m –1 K –2 at 300 K for (SnSe) 0.99 (SnS 2 ) 0.01 , which is enhanced by 53% compared to that of SnSe. Additionally, the existing point defects and planar defects effectively strengthen phonon scattering, thus reducing the lattice thermal conductivity , for example, 0.47 W m –1 K –1 at 773 K for the x = 0.02 sample. Eventually, a maximum zT of 0.80 at 823 K and an average zT of 0.52 over 300 – 823 K are obtained in the (SnSe) 0.99 (SnS 2 ) 0.01 sample, which are increased by 33% and 45% compared to those of SnSe, respectively. This study demonstrates a secondary phase alloying strategy to synergistically optimize the electrical and thermal properties of polycrystalline SnSe.
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高影响因子
ENERGY & FUELS
·
2022
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IF 4.654
Cheng Lan,Heping Xie,Yifan Wu,Bin Chen,Tao Liu
Electrochemical seawater splitting using efficient HER (hydrogen evolution reaction) and OER (oxygen evolution reaction) electrocatalysts have become an appropriate method for the mass production of green hydrogen. In this study, a noble-metal free OER electrocatalyst consisting of Mo-doped Ni3S2 nanocluster arrays on Nickle foam (Mo–Ni3S2/NF)─fabricated using a modified one-step solvothermal approach─is developed and evaluated. The proposed electrocatalyst demonstrates exceptional OER activity, requiring overpotentials of only 212 and 291 mV to deliver OER current densities of 10 and 100 mA cm–2, respectively, in alkaline seawater. The presence of Mo promotes Ni–S coordination, resulting in strong electronic interactions and substantially enhanced OER kinetics. Meanwhile, surface sulfate ions and (oxy)hydroxide (NiOOH) generated during the OER lead to enhanced activity and corrosion resistance, enabling Mo–Ni3S2/NF to operate continuously at 100 mA cm–2 for 500 h in alkaline natural seawater. This study is expected to inform the progression of sulfur-based transition-metal electrocatalysts for seawater oxidation.
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高影响因子
Journal of Water Process Engineering
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2022
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IF 7.34
Xu Chai,Huaqi Dong,Zenggao Zhang,Zhaoyang Qi,Jie Chen,Zhixian Huang,Changshen Ye,Ting Qiu
Due to natural and production activities, mercury contamination has become one of the major environmental problems in the world. Adsorption is one of the important means to solve this problem. However, most of the commercially available adsorbents exhibit relatively low adsorption capacity and slow kinetics. Therefore, a novel 4,6-diamino-2-mercaptopyrimidine-functionalised Zr-based metal-organic framework (UiO-66-DMP) was synthesised in this study. The UiO-66-DMP was characterised through X-ray diffraction, scanning electron microscopy, energy dispersive spectrometry , X-ray photoelectron spectroscopy, Fourier-transform infrared spectrometry, and thermogravimetric analysis . The potential of the UiO-66-DMP as a superior adsorbent for Hg(II) removal and the corresponding mechanisms were evaluated through batch experiments under different conditions and density functional theory calculations. Benefitting from its high specific surface area and multiple adsorption sites, the maximum Hg(II) adsorption capacity achieved in this study was 822.00 mg·g-1, which is the highest Hg(II) adsorption capacity reported to date. In addition, under the interference of Ca(II), Cd(II), Co(II), Mg(II), Mn(II), Ni(II), Cr(III), Cu(II), Zn(II) and other coexisting ions, the UiO-66-DMP could still maintain the high selective adsorption capacity for Hg(II). According to the characterization analysis and DFT calculation results, the adsorption of Hg(II) onto the UiO-66-DMP was dependent on electrostatic and covalent interactions between metal ions and abundant functional groups on the UiO-66-DMP surface.
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高影响因子
Journal of Water Process Engineering
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2022
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IF 7.34
Yanzhuo Zhang,Shengxu Liang,Rui He,Jing Zhao,Jinghua Lv,Wei Kang,Jian Zhang
Antibiotics in the water environment pose harm to animals, plants, and humans. In this study, biochar doped with sulfur (S), nitrogen (N), and NS was used to adsorb and activate peroxymonosulfate (PMS) to degrade the antibiotics chlortetracycline, ofloxacin, and sulfadiazine in an aqueous solution. The adsorption capacity of the biochar doped with single atoms increased significantly, and the maximum saturated adsorption capacities of undoped, N-doped, S-doped, and NS-doped biochar were 40.7, 85.5, 63.3, and 40.7 mg/g, respectively. The increase in specific surface area and the number of functional groups was the main cause for the increase in the adsorption capacity of heteroatom-doped biochar. The antibiotic degradation process involved the use of biochar to activate PMS and produce reactive oxygen species (ROS) for complete removal. The concentration of environmentally persistent free radicals (EPFRs) increased in response to heteroatom-doped biochar, and the type of EPFRs changed, which enhanced the ability of biochar to degrade antibiotics. At the 500 °C preparation temperature, the degradation rates of antibiotics by the undoped, N-doped, S-doped, and NS-doped biochar were 73.83%, 84.32%, 79.60%, and 74.10%, respectively, whereas the degradation rates at 900 °C were 82.38%, 93.78%, 91.11%, and 81.55%, respectively. The sulfate radical was produced during the activation process and made the largest relative ROS contribution to the increased adsorption capacity, followed by singlet oxygen, hydroxyl radical , and superoxide radical. Recycling experiments confirmed that the heteroatom-doped biochar was highly reusable and that the removal rates of N-doped biochar and S-doped biochar were high (81.94% and 78.06%, respectively).
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高影响因子
ACS Applied Nano Materials
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2022
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IF 6.14
Hongzhi Lu,Shoufang Xu
Nanoparticles are effective tools for signal amplification in chemical sensor construction. Herein, we present molecularly imprinted polymer (MIP)-based sandwich-structured fluorescence sensors for ultrasensitive detection of trace carcinoembryonic antigen (CEA) based on MnO2 nanosheet and MoS2 nanoflower dual signal amplification. MIPs were used as synthetic antibodies and prepared by a surface imprinting method using MnO2 nanosheet-loaded magnetic carbon fibers (CF/Fe3O4/MnO2) as solid supports by the self-polymerization of dopamine. The obtained CF/Fe3O4/MnO2/MIPs can specifically absorb the target CEA from complex samples, which can then be specifically labeled with boronic acid-modified MoS2-curcumin nanotags (BA-MoS2-CUR). Under alkaline conditions, CUR was detached from MoS2 and used as a fluorescence reporter molecule. Due to the high binding capacity of the MnO2 nanosheets and the high loading capacity of the MoS2 nanoflowers, the detection sensitivity of the molecularly imprinted fluorescence sensors was remarkably improved. Specific detection of CEA in the linear range of 0.01 ng/mL–10 μg/mL with a low LOD of 3.5 pg/mL (S/N = 3) was achieved. In addition, based on the MIPs and boronic affinity dual specific recognition ability, the detection selectivity was also improved. Finally, the concentration of CEA in human serum was determined by this approach.
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高影响因子
Nanoscale Research Letters
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2022
·Vol. 17
·期 1
·1-9
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IF 5.418
Yu Risheng,Liang Sen,Ru Yi,Li Lu,Wang Zhikun,Chen Junlang,Chen Liang
Carbon dots (CDs) have raised broad interest because of their great potential in the fluorescence related fields, such as photocatalysis and bioimaging. CDs exhibit different optical properties when dissolved in various solvents. However, the effects of solvents during the process of preparation on the fluorescence emission of CDs are still unclear. In this work, CDs were prepared by a simple one-pot solvothermal route. Typical critic acid and thiourea were used as precursors. Through changing the volume ratio of water to N , N -dimethylformamide (DMF), we have obtained color tunable CDs, with the emission wavelength from 450 to 640 nm. TEM images, Raman and XPS spectra indicate that the particle size of CDs and the content of surface functional groups (C–N/C–S and C≡N bonds) increase with the increasing ratio of DMF to water, which results in the optimal emission wavelength red-shifted. The prepared multicolor CDs may have prospects in the lighting applications. Graphical abstract
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 10
·7900-7912
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IF 2.779
Hu Xuemei,Bao Jianqin,Qiao Junqiang
We report the experimental realization of using copper zinc tin sulfide (Cu 2 ZnSnS 4 ) material for sonocatalytic application for the first time. Hierarchical Cu 2 ZnSnS 4 microspheres were synthesized via a facile one-pot hydrothermal method and characterized systematically. Aggregated Cu 2 ZnSnS 4 nanosheets with an average thickness of ~ 20 nm formed a highly open hierarchical structure. The hierarchical Cu 2 ZnSnS 4 microspheres displayed remarkable sonocatalytic activity both in Rhodamine B degradation and in Cr(VI) reduction. The detailed sonocatalytic experiments revealed that Rhodamine B dye degraded up to 96.4% in 14 min and Cr(VI) reduced up to 98.7% in 10 min and both Rhodamine B degradation and Cr(VI) reduction followed pseudo-first-order kinetics. The reusability tests confirmed that the hierarchical CZTS microspheres have proper stability after 4 consecutive cycles. Moreover, the effects of initial dye concentration, various scavengers, and oxidants on the sonocatalytic RhB degradation process have also been investigated. Furthermore, the plausible mechanism of the sonocatalytic degradation in the presence of hierarchical CZTS microspheres was proposed.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Hou-Qing Wang,Jing-Wen Wang,Xin-Zhu Wang,Xin-Hua Gao,Guo-Chao Zhuang,Jian-Bao Yang,Hua Ren
Hybrid nanofillers designed for polymer dielectric nanocomposites are expected to obtain excellent dielectric energy storage performance by virtue of different morphologies and electrical properties. In this work, the 2D/2D heterostructures of 2D MoS 2 grown on the surface of 2D transition metal carbide Ti 3 C 2 MXene (MoS 2 @MXene) have been successfully obtained through hydrothermal reaction. MoS 2 @MXene was incorporated into poly (vinylidene fluoride) (PVDF) to form the PVDF based dielectric composites (MoS 2 @MXene/PVDF) through solution casting method. The composite with 3.47 wt% MoS 2 @MXene is very flexible with an elastic modulus of 385 MPa, which is not much different with pure PVDF (357 MPa). The maximum electric displacement at room temperature and an electric field of 400 MV/m is 10.96 μC/cm 2 , moreover the discharged energy density reaches 17.22 J/cm 3 , which is nearly 4.5 times that of pure PVDF (3.83 J/cm 3 at the maximum electric field of 250 MV/m). The dielectric constant of 3.47 wt% MoS 2 @MXene/PVDF at room temperature and 10 3 Hz is 24.3, and the loss is only 0.02. Even though the filler content is increased to 12.51 wt%, the loss is only 0.06, and the dielectric constant of the composite film can reach 145.2. Compared with the blend of PVDF and MXene, the dielectric constant of MXene@MoS 2 /PVDF shows more excellent frequency stability and lower dielectric loss.
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高影响因子
Journal of Energy Chemistry
·
2022
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IF 13.599
Licheng Lou,Yuancai Gong,Jiazheng Zhou,Jinlin Wang,Xiao Xu,Kang Yin,Biwen Duan,Huijue Wu,Jiangjian Shi,Yanhong Luo,Dongmei Li,Hao Xin,Qingbo Meng
Photo-generated carrier recombination loss at the CZTSSe/CdS front interface is a key issue to the open-circuit voltage ( V OC ) deficit of Cu 2 ZnSnS x Se 4− x (CZTSSe) solar cells. Here, by the aid of an easy-handling spin-coating method, a thin PCBM ([6,6]-phenyl-C61-butyric acid methyl ester) layer as an electron extraction layer has been introduced on the top of CdS buffer layer to modify CZTSSe/CdS/ZnO-ITO (In 2 O 3 :Sn) interfacial properties. Based on Sn 4+ /DMSO (dimethyl sulfoxide) solution system, a total-area efficiency of 12.87% with a V OC of 529 mV has been achieved. A comprehensive investigation on the influence of PCBM layer on carrier extraction, transportation and recombination processes has been carried out. It is found that the PCBM layer can smooth over the CdS film roughness, thus beneficial for a dense and flat window layer. Furthermore, this CZTSSe/CdS/PCBM heterostructure can accelerate carrier separation and extraction and block holes from the front interface as well, which is mainly ascribed to the downward band bending of the absorber and a widened space charge region. Our work provides a feasible way to improve the front interfacial property and the cell performance of CZTSSe solar cells by the aid of organic interfacial materials.
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高影响因子
ACS Applied Nano Materials
·
2022
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IF 6.14
Xiaoli Xu,Shengyi Wang,Yan Chen,Wangwang Liu,Xiaoping Wang,Hongtao Jiang,Shuyi Ma,Pengdou Yun
2D transition-metal dichalcogenides (TMDs) have attracted much attention for promising application in gas sensors. Edges of the layered nanostructures are well known as highly reactive sites, besides the low working temperature. However, TMD sensors still suffer from the bottlenecks of low response and slow reaction kinetics. We propose an innovative use of porous carbon nanostructures originated from zeolitic imidazolate frameworks. In this work, multi-layered MoS2 nanoplates are confined in nanoscale porous carbon nanocages (PCNCs) by a facile hydrothermal technique. The carefully designed MoS2/PCNC sensor exhibits good triethylamine (TEA) sensing performances. Compared with pure MoS2, the response (Ra/Rg) of the MoS2/PCNC composite sensor to 100 ppm TEA is as high as 53. The theoretical TEA detection limit is estimated to be as low as 12 ppb. In addition, the investigation proves good stability and reproducibility. The possible sensing mechanism for the improved performances is discussed too. The innovative strategy for the controlled design of MoS2/PCNC nanostructures may provide valuable application in designing high-performance TEA sensors.
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高影响因子
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