RSC Advances
·
2014
·Vol. 5
·期 12
·9143-9153
·
IF 3.708
C. D. Gu,H. Zheng,X. L. Wang,J. P. Tu
SnO2 mesocrystals with mixed phases (i.e., tetragonal and orthorhombic phases) and nanoporous structures have been successfully synthesized via a facile annealing topotactic transformation from SnO precursors under ambient-pressure and a moderate temperature range of 400–600 °C. The morphology of the mesocrystal precursor possesses a hydrangea ball or multilayer pancake structure, which is determined by a novel ionothermal strategy using choline chloride/urea based deep eutectic solvent (DES) as the reaction medium and water as the morphology controlling agent. The self-assembly of SnO mesocrystals is based on a “non-classical crystallization” process involving an oriented attachment mechanism. The polarity dependent self-assembly of SnO mesocrystals in the reaction system is also highlighted. Significantly, the mixed phase and nanoporous SnO2 mesocrystal exhibits superior ethanol sensitivity compared with that of the SnO2 with a single tetragonal phase or a solid structure. The sensitivity of the SnO2 sample obtained at 400 °C is as high as 28.06 under 100 ppm ethanol and an optimum operation temperature of 300 °C, standing out from most of the state-of-the-art SnO2 nanomaterials, which is due to the incorporation of orthorhombic and tetragonal phases and the porous structure. Furthermore, the SnO2 mesocrystal with the mixed phases is also demonstrated to be a good selective ethanol sensor to effectively discriminate ethanol from acetone, methanol, and benzene.
研究领域:
材料科学
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纳米技术
·
传感器与传感器件
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Yu-Ping Sun,Yan-Fei Zhao,Hao Sun,Fu-Chao Jia,Parveen Kumar,Bo Liu
Platinum nanoparticle (NP)-functionalized flower-like mesoporous SnO 2 with a high specific surface area (31.6 m 2 g –1 ) and large pore diameter (32.5 nm) was synthesized using a double-template technique. The presence of Pt NPs was confirmed by X-ray photoelectron spectroscopy. Pt NPs with a size distribution of 2–4 nm were anchored on mesopores of the pre-synthesized three-dimensional SnO 2 nanoflowers upon physical mixing. The resulting Pt NP-decorated three-dimensional SnO 2 mesoporous nanoflowers were incorporated into a gas sensor to detect H 2 S. The Pt–SnO 2 sensor exhibited enhanced gas sensing properties toward H 2 S, with a 100 ppb detection limit, fast response, low working temperature, excellent stability, and good selectivity. The 0.3 wt% Pt–SnO 2 sensor exhibited a high response and excellent selectivity to H 2 S at room temperature (response value to 5 ppm H 2 S at 30 °C was 160). The significant improvements in gas sensing properties were attributed to the synergistic effect of the mesoporous nanostructure induced by the double-template method and the catalytic sensitization of the Pt NPs. These findings offer guidance for designing mesoporous materials and low-temperature H 2 S sensors.
研究领域:
材料科学
·
纳米技术
·
气体传感
·
化学传感器
·
纳米材料
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2012
·
IF 3.456
Haiting Lu,Sheng Yu,Yang Fan,Chunpeng Yang,Dongli Xu
We describe a simple method for preparing the hybrid material of Pt nanoparticles (NPs) supported on carbon-coated SnO 2 nanospheres (Pt–SnO 2 @C). The as-prepared Pt–SnO 2 @C nanocomposite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The presence of carbon-coated SnO 2 nanospheres (SnO 2 @C) remarkably improves the electrocatalytic activity of Pt NPs towards hydrogen peroxide (H 2 O 2 ) oxidation. The Pt–SnO 2 @C nanocomposite modified glassy carbon (GC) electrode exhibited enhanced amperometric response to H 2 O 2 , with detection limit of 0.1 μM and sensitivity of 241.1 μA mM −1 cm −2 .
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Solar RRL
·
2019
·Vol. 4
·期 2
·1900229
·
IF 0
Qiang Sun,Hao Li,Xiu Gong,Huaxia Ban,Yan Shen,Mingkui Wang
This study reports on interconnected SnO 2 electron transport layers (composed of presynthesized SnO 2 nanocrystals interconnected by amorphous phase SnO x ) processed at low temperature (120 °C) for highly efficient flexible perovskite solar cells. Herein, the amorphous phase SnO x serves as an effective binder to connect the SnO 2 nanocrystals to obtain ultra-smooth electron transport layers. Further characterization of the charge carrier kinetics at the perovskite/electron transport layer interface confirms that the interconnected SnO 2 nanocrystals layer facilitates electron extraction and retards nonradiative charge carrier recombination. Consequently, a power conversion efficiency of 16.29% is achieved for flexible perovskite solar cells using the interconnected SnO 2 electron transport layer on indium tin oxide/polyethylene terephthalate substrates.
研究领域:
材料科学
·
能源技术
·
纳米科技
✓ 已验证
产品关联
DOI
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Tong Qiu,Shiyu Zhou,Jiapeng Ji,Gu Wu,Wenjun Yan,Min Ling,Chengdu Liang
Hydrogen (H 2 ) sensors based on metal oxide semiconductors (MOS) are promising for many applications such as a rocket propellant, industrial gas and the safety of storage. However, poor selectivity at low analyte concentrations, and independent response on high humidity limit the practical applications. Herein, we designed rGO-wrapped SnO 2 –Pd porous hollow spheres composite (SnO 2 –Pd@rGO) for high performance H 2 sensor. The porous hollow structure was from the carbon sphere template. The rGO wrapping was via self-assembly of GO on SnO 2 -based spheres with subsequent thermal reduction in H 2 ambient. This sensor exhibited excellently selective H 2 sensing performances at 390 °C, linear response over a broad concentration range (0.1–1000 ppm) with recovery time of only 3 s, a high response of ∼8 to 0.1 ppm H 2 in a minute, and acceptable stability under high humidity conditions (e. g. 80%). The calculated detection limit of 16.5 ppb opened up the possibility of trace H 2 monitoring. Furthermore, this sensor demonstrated certain response to H 2 at the minimum concentration of 50 ppm at 130 °C. These performances mainly benefited from the special hollow porous structure with abundant heterojunctions , the catalysis of the doped-PdO x , the relative hydrophobic surface from rGO, and the deoxygenation after H 2 reduction.
研究领域:
材料科学
·
传感器技术
·
能源与环境
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 39
·2002092
·
IF 16.836
Facai Wei,Tingting Wang,Xiaolin Jiang,Yan Ai,Anyang Cui,Jing Cui,Jianwei Fu,Jiangong Cheng,Lecheng Lei,Yang Hou,Shaohua Liu
Currently, the precise control of the architecture and surface of functional materials for high-performance still remains a great challenge. Here, a feasible approach is presented to synchronously manipulate mesoporous surface and dimensionality of SnO 2 catalysts into hierarchically mesoporous nanosheets and nanospheres within one simple reaction system. By adjustment of the hydrophobic chain length of different fluorinated surfactants, 0D SnO 2 nanospheres with average size of 165 nm, and 2D SnO 2 ulthrathin nanosheets with thickness of 22.5 nm with the distinct dimensionalities are separately obtained (one stone, two birds), both of which are well decorated with ordered mesopore arrays on their surfaces (pore size of 16 nm). The following calcination gave rise to the formation of hierarchically mesopores (5 and 16 nm, respectively) with high crystallization and improved surface area (96.8 m 2 g −1 ). The resultant mesoporous SnO 2 nanosheets as catalyst for CO 2 electroreduction reaction (CO 2 RR) exhibit excellent selectivity, with a high Faraday efficiency (FE) of HCOOH reaching up to 90.0% at −1.3 V and C 1 FE of 97.4% at −1.2 V versus reversible hydrogen electrode, as well as long-term stability, which is among the best performance compared to reported SnO 2 materials, thanks to the collective contributions of the unique architecture and mesoporous structure.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2022
·
IF 5.089
Changhui Zhu,Kaiqiang Wang,Jia Luo,Baohe Tian,Jialin Sun,Xinhong Liu,Wenchao Zhu,Zhiyun Zou
α -Aromatic amino acid esters are important platform compound for drugs, sweeteners and fluorescent sensors. Due to the amphoteric dissociation and steric effect, the esterification of α -aromatic amino acids is difficult. Here, a green and efficient solid superacid, SO 4 2− -S 2 O 8 2− /SnO 2 -Nd 2 O 3 (SSSN), was synthesized and firstly used for the methyl esterification of α -aromatic L-tyrosine and L-tryptophan. The methyl esters yield was optimized with the highest L-TyrOMe yield of 93.1% and L-TrpOMe yield of 92% over SSSN-650 (SO 4 2− -S 2 O 8 2− /SnO 2 -Nd 2 O 3 calcined under 650 °C). Furthermore, it was clarified that the doping of Nd enhanced the electron-withdrawing inductive effect of SO 4 2− /S 2 O 8 2− with increased Brønsted and Lewis acidity, which were beneficial to the esterification of L-tyrosine and L-tryptophan. Besides, Nd-doping reduced the activation energy during L-Tyr esterification by kinetics study. Finally, SSSN-650 could be recycled six times with > 70% of their initial ester yield. The decrease of catalyst activity was caused by carbon deposition and species leaching. This work launched a novelty, rapid and environmental-benign technology for the esterification of α -aromatic amino acid using solid superacid.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 32
·1-11
·
IF 2.8
Hou Shikun,Wang Ying,Gao Feng,Jin Fei,Liang Weijie,Ge Zhizhou,Bai Gongxun,Peng Xiao,Yang Hua
Carbon cloth-based electromagnetic wave (EMW) absorbing materials have been widely studied due to their advantages of light weight, flexibility and high strength. At present, researchers widely use chemical in-situ growth method to construct secondary components on the surface of fibers to adjust the EMW absorption properties of carbon cloth (CC). However, there is still a lack of theoretical support behind this behavior. Herein, SnO 2 @SnS 2 was used as the secondary component, and SnO 2 @SnS 2 was constructed on the surface of CC by physical mixing (PM) and chemical in-situ (IS) growth, and the influence of the interface construction method on the microwave absorption performance of CC composites was studied. It is found that compared with SnO 2 @SnS 2 /CC-PM, SnO 2 @SnS 2 /CC-IS can more effectively adjust electromagnetic parameters, enhance multiple polarization, and enhance EMW loss. This can be attributed to the fact that the heterointerface between the secondary component constructed by chemical in-situ growth and the CC (SnO 2 @SnS 2 /CC) contributes much more to the EMW absorption than the intrinsic heterostructure in the secondary component (SnO 2 /SnS 2 ). It is proved that chemical in-situ growth is a more effective strategy to construct high-performance EMW absorbing materials. Provide research theoretical support for the development of high-performance CC composites.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Wenjun Zhang,Jian Liu,Zhong Jin
The electrochemical system based on water, CO2, and electricity is the key technology to realize the coexistence and combination of renewable energy and fossil energy, which can convert CO2 molecules into high-value-added products under mild and controlled conditions, thus achieving carbon neutrality. Designing efficient electrocatalysts to realize highly active, selective, and stable CO2RR has become one of the vital issues. Particularly, the nanostructure design and interface adjustment of electrocatalysts have been regarded as the key points for improving their catalytic performance. Herein, a tin dioxide hollow nanotube (SnO2 HNT) catalyst with a three-dimensional cross-linked network structure has been fabricated by electrospinning and rapid-heating calcination. The morphology and component structure of SnO2 HNTs were analyzed by a series of characterizations. The performance in electrocatalytic carbon dioxide reduction reaction (eCO2RR) was further tested. Owing to the hollow nanostructure, the catalyst possessed a large specific surface area and abundant active sites, which greatly accelerated mass transport and electron mobility. During eCO2RR, SnO2 HNTs achieved a peak faraday efficiency value of 87.4% for C1 products at −1.1 V vs RHE, which significantly suppressed the occurrence of hydrogen evolution side reactions. In addition, compared with the commercial SnO2 nanoparticles or partially reduced Sn/SnO2, the catalytic activity and selectivity of CO2-to-formate conversion significantly increased under the same potential, indicating that the optimization of electronic/geometric structure for high-yield metal oxides can effectively improve the comprehensive performance of eCO2RR.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Zepeng Wei,Manna Liu,Hongguo Li,Shishuai Sun,Liying Yang
SnO 2 quantum dots (QDs) intercalated with reduced graphene oxide nanosheet (rGO) composites are constructed by a simple hydrothermal process. The synergistic effect between the various assembly elements of the nanocomposite can compensate for the shortcomings of the individual components. The nanocomposite is attached to nickel foam to produce electrodes without adding carbon black and a binder, and the electrochemical properties of the composite electrodes are measured in 1 M Na 2 SO 4 electrolyte. The results show that the prepared composite electrodes have a capacity of 253.3 F/g at a current density of 100 mA/g, and the capacity remains at 198.9 F/g even at 2000 mA/g, indicating an excellent rate capability. Moreover, cyclic voltammetry results indicate that the composite electrodes present a specific capacitance retention of 95.9% after 6000 cycles, which supports potential application in supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 4
·1-12
·
IF 23.2
Lu Yukun,Zhang Yaojie,Zhang Jiale,Li Zhaoyang,Hu Feiyang,Pan Duo,Melhi Saad,Shi Xuetao,Amin Mohammed A.,El-Bahy Zeinhom M.,Shao Qian
Tin (Sn) micro-nanoparticles with special pine tree dendritic morphology were synthesized by using tin foil as the anode and titanium as the cathode through simple anodization method. Surprisingly, it is found that the morphology of Sn particles is closely related to factors such as the type of electrolyte, the concentration of the electrolyte, and the different applied voltages, and briefly discussed the influence of various factors on the growth of Sn particles. In addition, Sn particles are calcined under different temperature conditions to obtain Sn/SnO 2 hybrid materials with different tin dioxide (SnO 2 ) contents. The changes in morphology and the phase of SnO 2 crystal lattices were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively, which proved the successful synthesis of Sn/SnO 2 mixed materials. Finally, the Sn/SnO 2 hybrid material with metal-doped modified semiconductor properties was used to photocatalytic degradation of simulated organic pollutants rhodamine B (RhB). It was found that the photocatalytic degradation efficiency of the Sn/SnO 2 hybrid material under simulated sunlight conditions is near 90% in 5 h. Therefore, this work provides a convenient and effective environmental protection approach for the treatment of architecture and industrial dyes. Graphical Abstract Tin (Sn) micro-nanoparticles with special pine tree dendritic morphology are synthesized through simple anodization method, and the final product Sn/SnO 2 particles after different heat treatments show superior photocatalytic degradation of RhB under simulated solar light.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Qian Zhou,Baibai Liu,Yu Chen,Danqing Ma,Xiao Han,Dongmei He,Zhengfu Zhang,Hua Yang,Liming Ding,Jing Feng,Jianhong Yi,Cong Chen,Jiangzhao Chen
The defects from functional layers and interface, the agglomeration of SnO 2 nanoparticles (NPs), and poor perovskite crystallization are the main barrier to further heightening the power conversion efficiency (PCE) and stability of regular perovskite solar cells. Here, a bottom-up multilayer manipulation strategy by pre-embedding multisite racemic DL-cysteine hydrochloride monohydrate (DLCH) into the SnO 2 electron transport layer (ETL) is reported. The positively and negatively charged defects from ETL, perovskite layer and their interface can be passivated through the synergistic effect of the ─SH, ─COOH, ─NH 3 + , and Cl − groups in DLCH. The synergy of multiple functional groups and multiple chemical bonds enables bottom-up cross-layer passivation, which minimizes bulk and interfacial nonradiative recombination losses. Furthermore, the multifunctional DLCH plays a role in inhibiting the agglomeration of SnO 2 NPs, managing photons, relieving interfacial tensile stress, and manipulating perovskite crystallization. Benefiting from the above advantages, the DLCH-incorporating device delivers a PCE of 24.01%, which is much higher than the 21.61% of the control device. Moreover, the DLCH-modified devices demonstrate inviting thermal and ambient stabilities by maintaining 93% of the initial efficiency after aging at 65 °C for 1800 h and 95% of the original PCE after aging under a relative humidity of 20–25% for 2000 h.
研究领域:
材料科学
·
能源科学
·
化学
✓ 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）