JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Xiao-mei Zhang,Wei-long Zhang,Hui Yu,Xiang-ting Dong,Long Xia
The porous Eu(TTA) 3 (TPPO) 2 /SnO 2 (ETTS, TTA: 2-thenoyltrifluoroacetonate and TPPO : triphenylphosphine oxide) composite was prepared via sol-gel method with tetraethyl orthosilicate (TEOS) as catalyst which showed the cumulate litchi shell-like structure. The Eu(TTA) 3 (TPPO) 2 organic complexes (ETT) could be absolutely distributed into the pores of the SnO 2 matrix at the molecular level through sol-gel process. SiO 2 was used as the hard template which was removed to increase porosity during the prepared process. The red emission of ETTS was exhibited under the 368 nm excitation light, and much better luminescence properties was shown after washing off SiO 2 (ETTS-W) which was about 4 times of unwashed ETTS (ETTS-UW) and 15.6 times of ETT for 615 nm emission when Eu content was 6 wt%. The excellent luminescence property of ETTS-W samples was mainly attributed to the organic ligands, the pore structure after removing SiO 2 and stronger ultraviolet absorption capacity of SnO 2 matrix.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Wei-Lin Li,Hai Lai,Chen-Hao Sun,Yu-Yuan Lin,Yan-Hui Sun,Jun-Min Nan
SnO 2 -based anode of lithium-ion batteries (LIB) suffers from excessive volume expansion and low conductivity, resulting in very poor capacity stability and rate capability. To solve the problems, three kinds of SnO 2 /Sn@carbon heterostructures were synthesized by a salt template following calcination using tartaric acid, p-phthalic acid and ethylenediamine tetraacetic acid with different carboxyl groups as carbon sources, respectively. The acidity, carbon atoms number and position affect the ratio of SnO 2 /Sn, the morphology and content of derived carbon, the advantage crystal plane and the surface defects of SnO 2 . The carbon atoms located at carboxyl are transformed to CO and formed pores, and the carbon atoms at alkane chain are polycondensed and transformed to amorphous carbon during annealing process. The SnO 2 /Sn@C derived from tartaric acid (SnO 2 /Sn@TA) has the largest ratio of SnO 2 /Sn, which fixed on graphene-like porous carbon , exposed the most surface defects and more high energy crystal plane. The specific structure ensures structural stability and ultrahigh capacity, lower Li + diffusion barrier energy and super rate capability. It exhibits the charge/discharge capacity of 1059.7/1064.4 mAh g −1 at 2 A g −1 after 1500 cycles and super rate performance of 399.3/404.5 mAh g −1 at 6 A g −1 , which are superior to most reference data.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Sheng Zhu,Pengcheng Li,Guitai Wu,Zhenyu Li,Pei Wu,Yongming Hu,Haoshuang Gu,Wanping Chen
Two kinds of Pt SnO 2 composite nanoceramics have been prepared using SnO 2 nanoparticles and SnO 2 agglomerate powder separately. One is of a relatively uniform and porous microstructure with a specific surface area of 8.1 m 2 /g, and the other is of a rather non-uniform microstructure with large SnO 2 agglomerates and crack-like pores and a specific surface area of 6.4 m 2 /g. While the samples of uniform microstructure typically show a sensitivity of 150 to 1% H 2 – 20% O 2 – N 2 in air of 50% relative humidity (RH) at room temperature , those of non-uniform microstructure surprisingly show much higher sensitivities of 850 and 450 in air of 50% and 70% RH, respectively, to the same concentration of hydrogen. The influence of humidity on the samples has been further studied and a much higher humidity tolerance has been revealed for those samples of non-uniform microstructure. All these results demonstrate a clear and unexpected advantage of a non-uniform microstructure over a uniform one in humidity tolerance for room-temperature hydrogen-sensitive Pt SnO 2 composite nanoceramics.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Bo Yang,Jinbao Wang,Chaojin Jiang,Juying Li,Gang Yu,Shubo Deng,Shaoyou Lu,Peixin Zhang,Caizhen Zhu,Qiongfang Zhuo
The F and Sb co-doped Ti/SnO 2 electrode containing Sn-Sb interlayer was innovatively synthesized for electro-oxidation (EO) removal of perfluorooctane sulfonate (PFOS) in water. Stronger oxidation capability and remarkably longer lifetime were performed for Ti/Sn-Sb/SnO 2 -F-Sb electrode than these similar electrodes in this study without Sn-Sb interlayer and F/Sb doping, which could removed more than 99% of PFOS ( C 0 = 100 mg L −1 ) after 120-min electrolysis. The attribute of Ti/Sn-Sb/SnO 2 -F-Sb anode and its EO mechanism were surveyed by XRD, XPS, SEM, and LSV. F and Sb co-doping could improve the stability and EO capability of the electrode, which resulted from that the smooth surface was formed conveniently to produce physically adsorbed hydroxyl radical and lead to relatively high OEP. The operating parameters of EO process were also investigated including current density, pH value, and stirring speed, which revealed the effect of these parameters on PFOS decomposition. Additionally, the mineralization parameters, TOC and F − concentration, as well as short-chain perfluorocarboxylic acids were analyzed in solution during the electrolysis. Consequently, the EO pathway of PFOS was proposed through the detection of intermediates. These results manifest that Ti/Sn-Sb/SnO 2 -F-Sb anode is prospective to effectively decompose PFOS in wastewater.
研究领域:
环境科学
·
电化学工程
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2017
·Vol. 1
·期 10
·1700118
·
IF 0
Junjie Ma,Xiaolu Zheng,Hongwei Lei,Weijun Ke,Cong Chen,Zhiliang Chen,Guang Yang,Guojia Fang
In recent years, photovoltaic properties of hybrid perovskite solar cells (PSCs) have led to impressive improvement. Yet, there is still remain a challenge for large scale application and commercialization. Some of the reasons are the instability of the perovskite film and the lack of large-scale and low-cost manufacture techniques for electron transport layer (ETL). Tin oxide (SnO 2 ) has emerged as a promising candidate for ETL, however, systematic exploration of its commercialized application in PSCs is still missing. Here, SnO 2 ETL is prepared through an electron beam evaporation technology under low-temperature process to realize large-scale, low-cost, and uniform manufacture. Hundreds of SnO 2 ETL substrates can be fabricated at one time, which deserves industrial deployment. As a result, PSCs based on e-beam evaporated SnO 2 ETL and Cs-containing blended perovskite absorber layer exhibit a power conversion efficiency (PCE) of up to 18.2% without any interface modification. Furthermore, the PSCs demonstrate remarkable long-term stability, which remained at 97% of its initial PCE after being stored for over 34 days. The results demonstrate the great potential of the PSCs based on e-beam evaporated SnO 2 ETLs towards commercialization.
研究领域:
材料科学
·
可再生能源
·
光电技术
✓ 已验证
产品关联
DOI
Materials Research Express
·
2020
·Vol. 7
·期 1
·015513
·
IF 1.929
Xiaochun Ma,Han Liu,Chen Chen,Yanjun Liu,Lin Zhang,Bin Xu,Fan Xiao
In this study, In-situ precipitation reaction was used to prepare paraffin@SnO2/CNTs composite phase change materials. The paraffin@SnO2/CNTs composites material were prepared by using paraffin as a phase change core material, and tin dioxide and carbon nanotubes as composite shell materials. The microstructure, chemical composition and crystal phase structure of the composites were analyzed by Scanning electron microscope (SEM), Fourier infrared spectrum (FT-IR) and X-ray diffraction (XRD). The thermal performance and thermal stability of phase change materials were determined by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The microcapsule has a core–shell structure with a diameter of 2–5 μm. The encapsulation efficiency of the paraffin@SnO2/CNTs composite was calculated to be 42.94%. The slurry is formed by dispersing microcapsules in water, which not only greatly improves the specific heat capacity, thermal conductivity, visible light absorption, but also makes the effective receiving efficiency reach 91.79% at 40 °C, indicating that it is a promising heat transfer working slurry in the field of Direct Absorption Solar Collectors (DASC) system.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2020
·Vol. 12
·期 1
·1-19
·
IF 12.264
Huang Linsheng,Zhou Xiaowen,Xue Rui,Xu Pengfei,Wang Siliang,Xu Chao,Zeng Wei,Xiong Yi,Sang Hongqian,Liang Dong
Nanoscale multi-dimensional heterojunctions in situ grow at the edge of two-dimensional MXene conductive network.
A controlled anneal procedure in 150 °C is for preparing anatase TiO 2 /SnO 2 heterojunctions with oxygen vacancy scramble effect.
The perovskite solar cells achieve high power conversion efficiency and high moisture-resistance stability.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Xiaoyan Wang,Ya-Jun Cheng,Suzhe Liang,Qing Ji,Jin Zhu,Yonggao Xia
Ultrafine SnO2/Sn nanoparticles encapsulated into an adjustable meso-/macroporous carbon matrix have been successfully fabricated by the in situ SiOx sacrificial strategy. The control over the void space in the carbon matrix effectively improves the accessibility of the SnO2/Sn toward an electrolyte solution. More importantly, the void space also provides an efficient means to accommodate the mechanical stress caused by the volume change of the SnO2/Sn over cycles. As a result, the enhanced electrolyte accessibility and suppressed mechanical stress improve the electrochemical performance regarding reversible capacity, cyclic stability, and rate capability. A reversible capacity of 1105 mAh g–1 is still retained after 290 cycles at 200 mAg–1, and the capacity still can keep at 107 mAh g–1 at a high current density of 10 A g–1.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 11
·8220-8229
·
IF 2.22
Zhang Gaoyu,Sang Laifa,Xu Guogang,Dou Yajie,Wang Xinzhen
Meso-porous SnO 2 fibers were prepared via hydrothermal method, and natural silk was used as bio-template. Au nanoparticles served as the sensitizer were prepared on the surface of these SnO 2 fibers to further enhance the properties of gas sensing. Results show that these Au-modified products presented high surface area of 168.66 m 2 /g and meso-porous structure, and these fibers were composed of nanosized SnO 2 and Au particles with the size of about 7 ± 0.5 nm and 5 ± 0.5 nm, respectively. Gas sensing properties of these synthesized pristine products and Au-loaded fibers were investigated. Results show that these Au-modified SnO 2 fibers exhibited remarkably enhanced sensing performance to n -butanol with high response, good selectivity and good stability. The gas sensing mechanism was discussed from the effects of meso-porous structure, high surface area and Au nanoparticle catalytic activity.
研究领域:
材料科学
·
化学传感器
✓ 已验证
产品关联
DOI
高影响因子
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
·
2020
·Vol. 35
·期 9
·095030
·
IF 2.361
Zhiqiang Yao,Xi Wang,Man Yang,He Ma,Yanfeng Sun,Hong Zhang,Tianwei Dong,Weifeng Liu
Doping of noble metals into semiconductors is often used to enhance the response of gas sensors, accompanying the decrease of the particle size. In this work, pure and palladium-doped dispersive nanoscale tin dioxide nanoparticles with abundant surface defects are synthesized efficiently via a facile hydrothermal method. In the experiment, glucose is used as the carbon source to limit the growth of crystals through the carbonization process and create abundant surface defects after high temperature calcination. Compared with pure SnO2, Pd doping only slightly decreases the particle size with the increase of palladium doping amount from 11.9 nm to 9.6 nm. A gas-sensing investigation indicates that the sensor devices based on pure and 1 at%, 3 at%, 5 at% palladium-doped SnO2 show an obvious high response to n-butanol. In particular, the response to n-butanol reaches to the maximum with the palladium doping amount of 3 at%, and the response increases from 33.3 to 92.9 to 100 ppm n-butanol compared with pristine SnO2 nanoparticle at optimal working temperatures. A gas-sensing mechanism related to surface defects, chemical and electrical sensitization is also discussed.
研究领域:
材料科学
·
化学工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yu Xin,Shi Pan,Xuezhou Hu,Chang Miao,Shuqing Nie,Haoyi Mou,Wei Xiao
A facile in-situ preparation strategy is proposed to anchor amorphous SnO 2 nanoparticles into the porous N-doped carbon (NC) matrix to fabricate amorphous composite powders (am-SnO 2 @p-NC), which feature the hierarchically interconnected and well interlaced porous configurations by employing polyvinylpyrrolidone as the soft template. The morphology regulation of the porous structure is precisely realized by adjusting the content of the template and the relationship between structural evolution and electrochemical performance of composite powders is accurately described to explore the optimal template dosage. The results indicate that the am-SnO 2 @p-NC-50 % composite electrode can deliver the improved lithium storage capacity and cycling performance when the content of the template is controlled at 0.500 g, in which the initial discharge specific capacity is about 1557.6 mAh/g and the reversible value retains at 841.5 mAh/g after 100 cycles at 100 mA/g. Meanwhile, the discharge specific capacity of 869.8 mAh/g is exhibited for the am-SnO 2 @p-NC-50 % composite electrode after 60 cycles when the current density is recovered from 2000 to 100 mA/g. Moreover, the Li + ions diffusion coefficient up to about 5.5 × 10 −12 cm 2 /s is calculated from galvanostatic intermittent titration technique tests, which can be partly ascribed to the conductive NC substrate that provides the high electronic conductivity, and partly to the highly porous structure that shortens Li + ions transfer pathways and guarantees the fast reaction kinetics. Therefore, the hierarchically porous engineering of carbon networks to confine amorphous transition metal oxide nanoparticles is of great significance in the development of high-performance anode materials for lithium-ion batteries.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xubin Qian,Kefu Peng,Lei Xu,Shaoyu Tang,Weilai Wang,Min Zhang,Junfeng Niu
The global detection and potential harm of pharmaceuticals and personal care products (PPCPs) call for the effective decomposition technology. In this study, the modified β-PbO 2 anodes with different hydrophobicity (Ti/SnO 2 -Sb/La-PbO 2 , Ti/SnO 2 -Sb/La-PbO 2 -PTFE and Ti/SnO 2 -Sb/La-PbO 2 -PVDF) were prepared to decompose aqueous PPCPs, i.e. isoniazid, methotrexate, carbamazepine, sulfamethoxazole and ibuprofen. PTFE and PVDF modification improved the physical property, electrochemical property, stability and safety of β-PbO 2 electrode. Moreover, Ti/SnO 2 -Sb/La-PbO 2 -PVDF had the highest oxygen evolution potential (1.95 V vs. SCE), the largest electroactive area (88.85 cm 2 ), the highest HO • production rate (10.44 mM min −1 m −2 ) and the best degradation performance for all the five PPCPs. The hydrophobic surface increased the proportion of free HO • , resulting in higher radical utilization rate and better degradation performance. The excessive hydrophobicity could decrease the degradation performance of PPCPs with high log K ow due to the relatively large hydrophobic force zone. Furthermore, the hydrophobicity enhanced the mineralization (current) efficiency of isoniazid, and its electrochemical degradation mechanism on Ti/SnO 2 -Sb/La-PbO 2 -PVDF was thoroughly proposed. These results demonstrated that Ti/SnO 2 -Sb/La-PbO 2 -PVDF anode exhibited a good application prospect in treating wastewater containing PPCPs.
研究领域:
环境科学
·
电化学工程
✓ 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）