14 results on '"Chu, Shushu"'
Search Results
2. In2O3 Hierarchical Structures of One-Dimensional Electrospun Fibers with in Situ Growth of Octahedron-like Particles with Superior Sensitivity for Triethylamine at Near Room Temperature
- Author
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Qian Ma, Fu Xinghua, Chu Shushu, Liu Mingle, Hui Li, Liu Yu, Jia Guo, and Hang Li
- Subjects
In situ ,Materials science ,Renewable Energy, Sustainability and the Environment ,General Chemical Engineering ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Electrospinning ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Octahedron ,Environmental Chemistry ,Sensitivity (control systems) ,0210 nano-technology ,Triethylamine - Abstract
A one-step single-spinneret electrospinning method is used to prepare tunable In2O3 hierarchical structures of one-dimensional electrospun fibers with in situ growth of octahedron-like particles, a...
- Published
- 2020
3. Multilevel Effective Heterojunctions Based on SnO2/ZnO 1D Fibrous Hierarchical Structure with Unique Interface Electronic Effects
- Author
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Chu Shushu, Quande Che, Junpeng Wang, Qian Ma, Wang Gang, Hang Li, Hui Li, and Ping Yang
- Subjects
Materials science ,business.industry ,Economies of agglomeration ,Dispersity ,Heterojunction ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Chemical reaction ,Electrospinning ,0104 chemical sciences ,Electron transfer ,Optoelectronics ,General Materials Science ,0210 nano-technology ,Porosity ,business ,Absorption (electromagnetic radiation) - Abstract
One-step single-spinneret electrospinning synthesis of 1D fibrous hierarchical structure can not only prevent the agglomeration or restacking of fibers or particles and enlarge surface active area but also promote the directional migration of electrons in materials and achieve effective regulation of resistances. Herein, tunable SnO2 and SnO2/ZnO fibrous hierarchical structures with in situ growth of monodisperse spherical-like particles on surface provide a new sight for adjusting component distribution, surface absorption and chemical reaction, electronic transmission path, and electron transfer efficiency. Compared with SnO2 porous fibers and SnO2 hierarchical structures, the optimal SnO2/ZnO sensors exhibit superior gas-sensing response value of 366-100 ppm ethanol at 260 °C as well as excellent gas selectivity and long-term stability, in which the enhanced gas-sensing mechanism is primarily derived from multilevel effective heterojunctions with unique interface electronic effects. Especially, these SnO2-based sensors can achieve favorable linear relationship of the response and gas concentration for sensitive trace detection in cosmetics for the first time, providing a new strategy to design composite materials for quantitative analysis of volatiles in the cosmetics evaluation process.
- Published
- 2019
4. Hierarchical WO3/ZnWO4 1D fibrous heterostructures with tunable in-situ growth of WO3 nanoparticles on surface for efficient low concentration HCHO detection
- Author
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Qian Ma, Junpeng Wang, Ping Yang, Chu Shushu, Quande Che, Wang Gang, and Hui Li
- Subjects
Materials science ,Metals and Alloys ,Nucleation ,Nanoparticle ,Heterojunction ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Electrospinning ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,law.invention ,Crystal ,Chemical engineering ,law ,Nanofiber ,Specific surface area ,Materials Chemistry ,Calcination ,Electrical and Electronic Engineering ,0210 nano-technology ,Instrumentation - Abstract
Hierarchical WO3/ZnWO4 1D fibrous heterostructures with tunable in-situ growth of WO3 nanoparticles on surface have been fabricated by the original one-step electrospinning technology combined with subsequent calcination process. Phase composition and morphology can be transformed from bead-like WO3 fibers to hierarchical WO3/ZnWO4 1D composites with the introduction of ZIF-8 into the precursor solution, which was mainly attributed to the combination of nucleation competition and crystal planes matching mechanisms during heat treatment. Compared with pure WO3 and WO3/ZnWO4-10%, WO3/ZnWO4-5% displayed the highest specific surface area value evaluated to be 268.57, indicating the prominent enhanced absorption behavior for targeted organic species. It is found that WO3/ZnWO4-5% composites have a response about 44.5 for 5 ppm HCHO, which was almost 8 times higher than that of sensor based on pure WO3 nanofibers at the optimal operating temperature. Meanwhile, the fast response/recovery time (12/14 s) and excellent stability characteristics (recycling, long-term, and humidity stability) towards HCHO can be also observed for WO3/ZnWO4-5% samples. The enhanced gas-sensing mechanism based on WO3/ZnWO4 composites can be ascribed to the synergistic effect of effective heterojunctions, large specific surface area, multiple reaction sites, and unique surface/interface electron transmission. The design and construction of hierarchical WO3/ZnWO4 1D materials attest to the significant potential of their use as novel gas sensors for detecting low concentration HCHO.
- Published
- 2019
5. Novel Construction of Morphology-Tunable C–N/SnO2/ZnO/Au Microspheres with Ultrasensitivity and High Selectivity for Triethylamine under Various Temperature Detections
- Author
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Ping Yang, Wang Gang, Junpeng Wang, Hui Li, Chu Shushu, Quande Che, Qian Ma, and Fang Yuan
- Subjects
Materials science ,Nanoparticle ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Microstructure ,01 natural sciences ,Electrospinning ,0104 chemical sciences ,law.invention ,Crystal ,chemistry.chemical_compound ,Crystallinity ,chemistry ,Chemical engineering ,law ,General Materials Science ,Calcination ,0210 nano-technology ,Dispersion (chemistry) ,Triethylamine - Abstract
Morphology-tunable C–N/SnO2-based hierarchical microspheres with good gas sensitivity for triethylamine (TEA) have been fabricated via facile electrospinning and a subsequent calcination process. The reaction temperature and modifying calcining technology played a dominant role for the morphological evolution from precursor fibers to microspherical shapes and the formation of C–N-decorated SnO2 phase composition. C–N/SnO2/ZnO composites with tunable crystallinity, microstructure, and gas-sensing performance were strictly dependent on the added amount of Zn element. Fascinatingly, the constructed C–N/SnO2/ZnO/Au composites can not only precisely regulate the crystal size, dispersion status, loading position, and content of Au nanoparticles but also display excellent gas-sensing properties with ultrasensitivity and high selectivity under various temperature detections. The response of C–N/SnO2/ZnO/Au composites can reach up to approximately 1970, calculated to be 121.6 and 23.6 times for 50 ppm TEA molecule...
- Published
- 2019
6. Construction of In2O3 hierarchical microstructures consisting of single crystalline octahedral particles and polycrystalline fibers for detection of low concentration HCHO
- Author
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Hang Li, Ping Yang, Hui Li, Chu Shushu, Wang Yi, Yingzi Wang, and Qian Ma
- Subjects
Materials science ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Microstructure ,01 natural sciences ,Electrospinning ,0104 chemical sciences ,law.invention ,Octahedron ,Chemical engineering ,law ,General Materials Science ,Calcination ,Crystallite ,0210 nano-technology ,Volume concentration - Abstract
Tunable In2O3 hierarchical microstructures consisting of single crystalline octahedral particles and polycrystalline fibers have been synthesized by one-step electrospinning combined with a subsequent calcination process, in which their enhanced gas-sensing mechanism is mainly ascribed to the synergistic effect of two typical structural units.
- Published
- 2019
7. ZIF-8-Induced CeO2/ZnO Nanobelts with Curled Edges Accelerating Cycling Efficiency of Ce3+/Ce4+ for Superior Photocatalytic Performance.
- Author
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Zhang, Qi, Guo, Jia, Li, Hang, Chu, Shushu, and Ma, Qian
- Subjects
NANOBELTS ,WASTEWATER treatment ,INDUSTRIAL wastes ,SEWAGE ,CRYSTAL growth ,METHYLENE blue ,PHOTODEGRADATION ,ION recombination - Abstract
ZIF-8-induced photocatalytic CeO
2 /ZnO nanobelts with curled edges were synthesized by following a facile electrospinning method for low-cost photodecomposition of methylene blue (MB). Phase structure and morphological evolution of different samples can be dominantly adjusted by introducing appropriate amount of zeolitic imidazolate framework-8 (ZIF-8) into the precursor solution. CeO2 /ZnO heterostructures exhibit the optimal 96.59% photodegradation of MB organic pollutant in 70 min, approximately 7.43 times than that of pure CeO2 . The curled microstructure can produce tunable surface activity and a unique electron transport process, facilitating the cycling efficiency of Ce3+ /Ce4+ pairs on the surface of materials. Meanwhile, the formation of CeO2 -ZnO heterojunctions contributes to regulating the crystal nucleation and growth during the high-temperature reaction and reducing the recombination rate of electron/hole pairs during the photocatalytic degradation. Thus, the obtained CeO2 /ZnO composites may be a promising candidate for MB degradation in industrial wastewater treatment. [ABSTRACT FROM AUTHOR]- Published
- 2022
- Full Text
- View/download PDF
8. Available surface electronic transmission of porous SnO2/NiO hollow nanofibers for the enhanced gas-sensing performance toward n-butanol
- Author
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Qi Zhang, Qian Ma, Jia Guo, Lin Ziqiong, Hang Li, and Chu Shushu
- Subjects
010302 applied physics ,Materials science ,Mechanical Engineering ,Non-blocking I/O ,Oxide ,Nucleation ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Microstructure ,01 natural sciences ,Electrospinning ,law.invention ,chemistry.chemical_compound ,Chemical engineering ,chemistry ,Mechanics of Materials ,law ,Nanofiber ,0103 physical sciences ,General Materials Science ,Crystallization ,0210 nano-technology ,Porosity - Abstract
Porous SnO2/NiO hollow nanofibers with effective surface transmission behavior have been prepared through a facile modified electrospinning method. The introduction of Ni component into the precursor solution can not only regulate the morphological evolution together with the nucleation and crystallization of oxide heterostructures at the elevated temperature action, but also significantly contribute to the enhancement of the gas-sensing performance for testing n-butanol gas. SnO2/NiO composites can present the highest response of 199 at the optimum operating temperature of 280 °C toward 100 ppm n-butanol gas, which is 4.5 times than that of pure SnO2 nanofibers. Meanwhile, the response/recovery times of the sensors can be immensely decreased from 57/16 s of pure sample to 36/10 s as the adding amount of Ni component increasing to 5%, along with the superior selectivity and long-term stability toward n-butanol. The excellent gas-sensing properties of the sensors can be mainly attributed to the flourishing porous one-dimensional (1D) microstructure containing the closely connected p-n heterojunctions of SnO2 and NiO, which can provide large specific surface areas with a mass of active sites to promote the reaction between n-butanol molecule and Oδ− on the surface.
- Published
- 2021
9. ZIF-67-induced double-tubular 1D CeO2/Co3O4 heterostructures allowing electron transfer synergetic mechanism for enhanced photocatalytic performance
- Author
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Chu Shushu, Qi Zhang, Qian Ma, Hang Li, Lin Ziqiong, and Jia Guo
- Subjects
Materials science ,Nanostructure ,Mechanical Engineering ,Heterojunction ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Microstructure ,01 natural sciences ,Electrospinning ,0104 chemical sciences ,Nanomaterials ,Electron transfer ,Chemical engineering ,Mechanics of Materials ,Specific surface area ,Photocatalysis ,General Materials Science ,0210 nano-technology - Abstract
ZIF-67-induced double-tubular 1D CeO2/Co3O4 heterostructures have been prepared by an electrospinning method with tunable morphological evolution mechanism. As the adding amount of ZIF-67 increasing, the morphologies of CeO2-based nanomaterials are changed from porous granular nanobelt to smooth curly shape, and finally formed a double-tubular structure. The optimal CeO2/Co3O4 products consisting of well-dispersed double-tubular nanostructure with the external diameter of about 200 nm display high specific surface area of 196.05 m2g−1 and superior photocatalytic performance of methylene blue (MB). The rapid degradation rate of 97% within 40 min and high cycling stability without significant decrease of photocatalytic activity could be attributed to the unique electron transfer synergetic mechanism based on the combination of double-tubular microstructure and CeO2/Co3O4 heterojunctions.
- Published
- 2021
10. Construction of C-N/SnO2/Co3O4 microspheres with improvable electronic transmission for enhanced triethylamine gas-sensing performance
- Author
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Jia Guo, Qian Ma, Lin Ziqiong, Qi Zhang, Hang Li, Hui Li, and Chu Shushu
- Subjects
Physics ,Analytical chemistry ,food and beverages ,General Physics and Astronomy ,Trimethylamine ,Heterojunction ,Microstructure ,01 natural sciences ,Electrospinning ,010305 fluids & plasmas ,Microsphere ,chemistry.chemical_compound ,chemistry ,0103 physical sciences ,Electronic transmission ,Molecule ,010306 general physics ,Triethylamine - Abstract
Composition-tunable C-N/SnO2/Co3O4 microspheres with available gas-sensing behavior were successfully fabricated via a facile electrospinning technology, mainly achieved by different adding amounts of ZIF-67. It is found that both the introduction of C-N components and the formation of p-n heterojunction can effectively accelerate electron transmission and enhance the gas sensitivity properties of the material toward trimethylamine (TEA). The highest response of C-N/SnO2/Co3O4 microspheres can reach up to approximately 154.3, calculated to be 9 times for 50 ppm triethylamine molecules at a temperature of 360 °C than that of C-N/SnO2 microspheres. Moreover, the threshold limit value of gas response can be observed as the exposure to even a concentration of merely 5 ppm TEA, indicating their potential application on detecting TEA released during the decay process of prawn in the low concentration region.
- Published
- 2021
11. Construction of In2O3 hierarchical microstructures consisting of single crystalline octahedral particles and polycrystalline fibers for detection of low concentration HCHO.
- Author
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Li, Hui, Wang, Yingzi, Ma, Qian, Chu, Shushu, Li, Hang, Wang, Yi, and Yang, Ping
- Subjects
MICROSTRUCTURE ,FIBERS ,PARTICLES ,POLYCRYSTALLINE semiconductors ,CONSTRUCTION ,CALCINATION (Heat treatment) ,ELECTROSPINNING - Abstract
Tunable In
2 O3 hierarchical microstructures consisting of single crystalline octahedral particles and polycrystalline fibers have been synthesized by one-step electrospinning combined with a subsequent calcination process, in which their enhanced gas-sensing mechanism is mainly ascribed to the synergistic effect of two typical structural units. [ABSTRACT FROM AUTHOR]- Published
- 2019
- Full Text
- View/download PDF
12. Hierarchical WO3/ZnWO4 1D fibrous heterostructures with tunable in-situ growth of WO3 nanoparticles on surface for efficient low concentration HCHO detection.
- Author
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Li, Hui, Chu, Shushu, Ma, Qian, Wang, Junpeng, Che, Quande, Wang, Gang, and Yang, Ping
- Subjects
- *
NANOFIBERS , *NANOPARTICLES , *HETEROSTRUCTURES , *ELECTROSPINNING , *CHARGE exchange - Abstract
Graphical abstract Highlights • Hierarchical WO 3 /ZnWO 4 nanofibers with WO 3 nanoparticles on surface are gained. • Unique morphology relies on the introducing of ZIF-8 by one-step electrospinning. • WO 3 /ZnWO 4 sensors display excellent sensing behavior to low concentration HCHO. • Sensing mechanism depends on combination of various physicochemical characteristics. • Construction strategy can be used for other WO 3 -based sensors by similar method. Abstract Hierarchical WO 3 /ZnWO 4 1D fibrous heterostructures with tunable in-situ growth of WO 3 nanoparticles on surface have been fabricated by the original one-step electrospinning technology combined with subsequent calcination process. Phase composition and morphology can be transformed from bead-like WO 3 fibers to hierarchical WO 3 /ZnWO 4 1D composites with the introduction of ZIF-8 into the precursor solution, which was mainly attributed to the combination of nucleation competition and crystal planes matching mechanisms during heat treatment. Compared with pure WO 3 and WO 3 /ZnWO 4 -10%, WO 3 /ZnWO 4 -5% displayed the highest specific surface area value evaluated to be 268.57, indicating the prominent enhanced absorption behavior for targeted organic species. It is found that WO 3 /ZnWO 4 -5% composites have a response about 44.5 for 5 ppm HCHO, which was almost 8 times higher than that of sensor based on pure WO 3 nanofibers at the optimal operating temperature. Meanwhile, the fast response/recovery time (12/14 s) and excellent stability characteristics (recycling, long-term, and humidity stability) towards HCHO can be also observed for WO 3 /ZnWO 4 -5% samples. The enhanced gas-sensing mechanism based on WO 3 /ZnWO 4 composites can be ascribed to the synergistic effect of effective heterojunctions, large specific surface area, multiple reaction sites, and unique surface/interface electron transmission. The design and construction of hierarchical WO 3 /ZnWO 4 1D materials attest to the significant potential of their use as novel gas sensors for detecting low concentration HCHO. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
13. Construction of C-N/SnO2/Co3O4 microspheres with improvable electronic transmission for enhanced triethylamine gas-sensing performance.
- Author
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Li, Hang, Guo, Jia, Chu, Shushu, Li, Hui, Zhang, Qi, Lin, Ziqiong, and Ma, Qian
- Subjects
- *
P-N heterojunctions , *MECHANICAL properties of condensed matter , *MICROSPHERES , *HETEROJUNCTIONS , *CONSTRUCTION , *SHRIMPS - Abstract
• Tunable C-N/SnO 2 /Co 3 O 4 microspheres were prepared via an electrospinning route. • The introduction of ZIF-67 affects the composition and gas-sensing property. • C-N/SnO 2 /Co 3 O 4 microspheres show excellent gas-sensing performance to TEA. • The threshold limit of response can be observed as the exposure to 5 ppm TEA. • Synergistic combination of p-n heterojunction and C-N components was discussed. Composition-tunable C-N/SnO 2 /Co 3 O 4 microspheres with available gas-sensing behavior were successfully fabricated via a facile electrospinning technology, mainly achieved by different adding amounts of ZIF-67. It is found that both the introduction of C-N components and the formation of p-n heterojunction can effectively accelerate electron transmission and enhance the gas sensitivity properties of the material toward trimethylamine (TEA). The highest response of C-N/SnO 2 /Co 3 O 4 microspheres can reach up to approximately 154.3, calculated to be 9 times for 50 ppm triethylamine molecules at a temperature of 360 °C than that of C-N/SnO 2 microspheres. Moreover, the threshold limit value of gas response can be observed as the exposure to even a concentration of merely 5 ppm TEA, indicating their potential application on detecting TEA released during the decay process of prawn in the low concentration region. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
14. Available surface electronic transmission of porous SnO2/NiO hollow nanofibers for the enhanced gas-sensing performance toward n-butanol.
- Author
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Ma, Qian, Li, Hang, Guo, Jia, Chu, Shushu, Zhang, Qi, and Lin, Ziqiong
- Subjects
- *
NANOFIBERS , *P-N heterojunctions , *BUTANOL , *POLYACRYLONITRILES , *HIGH temperatures , *ELECTROSPINNING , *SURFACE area , *FISCHER-Tropsch process - Abstract
Porous SnO 2 /NiO hollow nanofibers with effective surface transmission behavior have been prepared through a facile modified electrospinning method. The introduction of Ni component into the precursor solution can not only regulate the morphological evolution together with the nucleation and crystallization of oxide heterostructures at the elevated temperature action, but also significantly contribute to the enhancement of the gas-sensing performance for testing n-butanol gas. SnO 2 /NiO composites can present the highest response of 199 at the optimum operating temperature of 280 °C toward 100 ppm n-butanol gas, which is 4.5 times than that of pure SnO 2 nanofibers. Meanwhile, the response/recovery times of the sensors can be immensely decreased from 57/16 s of pure sample to 36/10 s as the adding amount of Ni component increasing to 5%, along with the superior selectivity and long-term stability toward n-butanol. The excellent gas-sensing properties of the sensors can be mainly attributed to the flourishing porous one-dimensional (1D) microstructure containing the closely connected p-n heterojunctions of SnO 2 and NiO, which can provide large specific surface areas with a mass of active sites to promote the reaction between n-butanol molecule and Oδ− on the surface. [Display omitted] • Porous SnO 2 /NiO hollow nanofibers were gained by a facile electrospinning method. • The introduction of Ni component regulates the morphological evolution of samples. • SnO 2 /NiO nanofibers show the excellent gas-sensing performance to n-butanol. • High response, rapid response/recovery times, and good stability can be obtained. • The mechanism is due to the p-n heterojunction and tunable porous microstructure. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
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