Synthesis and enhanced gas sensing properties of flower-like ZnO nanorods decorated with discrete CuO nanoparticles

Zhang, Bowen; Fu, Wuyou; Li, Huayang; Fu, Xinglin; Wang, Ying; Bala, Hari; Wang, Xiaodong; Sun, Guang; Cao, Jianliang; Zhang, Zhanying

doi:10.1016/j.matlet.2016.03.004

Cited by 19 publications

(3 citation statements)

References 14 publications

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“…The surface of the molybdenum disulfide quantum dots was characterized by FTIR spectroscopy. As seen in Figure 1 a, the O-H vibrational peak and N-H stretching vibrational peak at 3420 cm −1 [ 58 ], the C-H vibrational peak at 2959 cm −1 [ 59 ], the asymmetric stretching vibrational peak C-NH at 1645 cm −1 , 1349 cm −1 , and the vibrational peak at 619 cm −1 are characteristic absorption peaks of Mo-S [ 60 ]. This suggests that its surface may be rich in functional groups such as carboxyl, amine, and hydroxyl.…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal Synthesis of Molybdenum Disulfide Quantum Dots for Highly Sensitive Detection of Iron Ions in Protein Succinate Oral Solution

Lang

Zhang

2023

Micromachines

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In this paper, a molybdenum disulfide fluorescent probe with an Fe3+ fluorescent system was first synthesized by the hydrothermal method for the detection of iron ion concentration in oral solution of protein succinate. It was characterized by infrared, fluorescence, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The probes were found to have good stability, photobleaching, and storage stability. The effects of dilution, pH, reaction time, and iron ion concentration on the fluorescent system were also investigated. The relative fluorescence intensity [(I0 − I)/I0] showed a good linear relationship with the iron ion concentration in the range of 0–50 μM, with the linear equation [(I0 − I)/I0] = 0.0148[Fe3+] + 0.0833 (r2 = 0.9943, n = 11) and the detection limit of 2.43 μM. The reaction mechanism was also explored, as well as its ion selectivity, reversibility, accuracy, precision, and concentration of Fe ions in the actual sample. It was found that the probe can selectively detect Fe ions with a certain degree of reversibility, accuracy, precision, and ideal recovery, and it can be used for the determination of Fe3+ in proteosuccinic acid oral solution.

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Section: Resultsmentioning

confidence: 99%

Hydrothermal Synthesis of Molybdenum Disulfide Quantum Dots for Highly Sensitive Detection of Iron Ions in Protein Succinate Oral Solution

Lang

Zhang

2023

Micromachines

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“…Simultaneously, numerous local hole accumulation layers are formed around CuO nanocrystals, which is disadvantageous to electron transport. 16 This leads to the formation of a high barrier of p–n heterojunctions of CuO|ZnO. Undoubtedly, all this will contribute to the resistivity of porous CuO-doped ZnO nanobelts.…”

Section: Resultsmentioning

confidence: 99%

Enhanced chemiresistive sensing performance of well-defined porous CuO-doped ZnO nanobelts toward VOCs

Chen

et al. 2019

Nanoscale Adv.

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Although the post-doping approach as a typical and effective method has been widely employed to improve the gas sensing performance of nanostructured metal oxides, it easily breaks their porous nanostructures. Herein a facile partial cation-exchange strategy combined with thermal oxidation has been developed to prepare porous CuO-doped ZnO nanobelts. Using ZnSe$0.5N 2 H 4 nanobelts as the precursor template, Cu 2 Se-doped precursor nanobelts were obtained with Zn 2+ cations partially exchanged by Cu 2+ cations. After annealing in air, they are further oxidized into well-defined porous CuO-doped ZnO nanobelts. Through manipulating the amount of exchanged Cu 2+ cations, the CuOdoping concentration can be precisely tuned. Based on the assembly approach and in situ thermal oxidation, a uniform and stable sensing film consisting of porous CuO-doped nanobelts was fabricated.Compared with pristine porous ZnO nanobelts, the as-prepared porous CuO-doped nanobelts with ptype CuO|n-type ZnO heterojunctions exhibited better sensing performance toward volatile organic compounds (VOCs). Especially for 3 at% CuO-doped porous ZnO nanobelts, the relative responses toward 100 ppm of ethanol, acetone and formaldehyde were greatly enhanced more than two, four and ten times, respectively. Due to the porous structure, they also displayed a fast response/recovery time.Finally, this enhanced sensing mechanism was discussed for porous CuO-doped ZnO nanobelts.Scheme 1 The process of preparation of porous CuO-doped ZnO nanobelts: (1) Zn 2+ cations of ZnSe$0.5N 2 H 4 nanobelts as a precursor template partially exchanged by Cu 2+ , (2) the transformation from Cu 2 Se doped precursor nanobelts to porous CuO-doped ZnO nanobelts via thermal oxidation.This journal is

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“…As a versatile material, zinc oxide (ZnO) has been widely used in various fields, such as catalysts [39], microsensors, photo-electrochemical cell [40][41][42], most of which depend closely on the microstructures of the materials, including crystal size, growth orientation and morphology. Recently, in lure of the fascinating morphologies and potential applications, a great deal of ZnO materials with interesting and amazing structures have been synthesized, such as nanosheets, flower-like structures, urchin-like hollow spheres, nanorods, nanoparticles, nanowires, and some novel hierarchical nanostructures with high symmetries [43][44][45][46][47][48][49][50][51][52]. In this study, biomorphic porous ZnO was fabricated using legume straw as template for the first time, which exhibited excellent performance for Pb 2+ ions efficient removal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Efficient Pb²⁺ adsorption of biomorphic porous ZnO derived from legume straw

Qiao

Wang

et al. 2019

Env Prog and Sustain Energy

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Using legume straw as template, biomorphic porous ZnO (named ZnO‐B) was synthesized by impregnation and calcination methods. Different characterizations were used to analyze the as‐prepared samples, such as Thermal Gravimetric and Differential Thermal (TG‐DTA), powder X‐ray Diffraction (XRD), Fourier Transform Infrared Spectrometer (FTIR), Scanning Electron Microscope (SEM), Energy dispersive X‐ray spectroscopy (EDX), and Transmission Electronic Microscope (TEM) methods. The adsorption properties of as‐synthesized samples for Pb2+ were studied. As a result, a baculiform structure with porous surface is formed by well‐crystallized ZnO grain self‐assembly on legume straw. The Brunauer–Emmett–Teller (BET) specific surface areas of ZnO‐B is larger than that of ZnO synthesized without template (expressed as ZnO‐A). The zeta potential isoelectric point of ZnO‐B is pHpzc = 5.31. The ZnO‐B showed the most outstanding performance adsorption properties for Pb2+ than ZnO‐A and ZnO‐C (commercial ZnO), removal efficiency was >97.65% and adsorption capacity was 78.73 mg/g. The adsorption equilibrium can be achieved within 20 min. Decrease of temperature would benefit the adsorption. The adsorption process followed the Pseudo‐second model, and the adsorption isotherm model accorded with the Freundlich isothermal model. The E values in Dubinin–Radushkevich (D–R) isotherm model indicated that the adsorption is chemisorption. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13146, 2019

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Synthesis and enhanced gas sensing properties of flower-like ZnO nanorods decorated with discrete CuO nanoparticles

Cited by 19 publications

References 14 publications

Hydrothermal Synthesis of Molybdenum Disulfide Quantum Dots for Highly Sensitive Detection of Iron Ions in Protein Succinate Oral Solution

Hydrothermal Synthesis of Molybdenum Disulfide Quantum Dots for Highly Sensitive Detection of Iron Ions in Protein Succinate Oral Solution

Enhanced chemiresistive sensing performance of well-defined porous CuO-doped ZnO nanobelts toward VOCs

Efficient Pb²⁺ adsorption of biomorphic porous ZnO derived from legume straw

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Synthesis and enhanced gas sensing properties of flower-like ZnO nanorods decorated with discrete CuO nanoparticles

Cited by 19 publications

References 14 publications

Hydrothermal Synthesis of Molybdenum Disulfide Quantum Dots for Highly Sensitive Detection of Iron Ions in Protein Succinate Oral Solution

Hydrothermal Synthesis of Molybdenum Disulfide Quantum Dots for Highly Sensitive Detection of Iron Ions in Protein Succinate Oral Solution

Enhanced chemiresistive sensing performance of well-defined porous CuO-doped ZnO nanobelts toward VOCs

Efficient Pb2+ adsorption of biomorphic porous ZnO derived from legume straw

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Efficient Pb²⁺ adsorption of biomorphic porous ZnO derived from legume straw