CRYSTENGCOMM
·
2022
·Vol. 24
·期 22
·4021-4029
·
IF 3.756
Jianan Huang,Bojia Xu,Binghui Ge,Yi Xu,Baobao Cao
Novel zero-dimensional SnO2(ZnO:Sn)m superlattice nanoparticles were synthesized by a simple method of annealing ZnO nanoparticles precoated with a sol–gel Sn–Zn–O precursor. The annealing temperature and duration were systematically evaluated, and the optimum condition was confirmed as 900 °C for 45 min to obtain ideally fully developed layered structures. Cs-corrected scanning transmission electron microscopy (STEM) revealed that the SnO2(ZnO:Sn)m was composed of alternate stacking of a Sn–O octahedral layer and Sn-doped ZnO slab, which resulted from the anisotropic diffusion of Sn atoms in the ZnO basal plane. A gas sensor based on the SnO2(ZnO:Sn)m superlattice nanoparticles exhibited a superior selectivity towards the poisonous gas of hydrogen sulphide (H2S) among six different types of gases (ethanol, H2, CO, NO2, NH3 and H2S), and an extreme low H2S detection limit of 5 ppb at the working temperature of 400 °C, which was about 3–5 orders lower than that of most ZnO-based H2S gas sensors in the literature. The drastic enhancement of the sensing properties of the SnO2(ZnO:Sn)m superlattice nanoparticles was believed to originate from its unique layered structure, which forms a microcirculation of electrons between the Sn–O atomic layers and Sn-doped ZnO slabs with different work functions, thus greatly accelerating the adsorption and desorption rate of gas molecules and increasing the sensor sensitivity. These new SnO2(ZnO:Sn)m superlattice nanoparticles were demonstrated to be a competitive H2S sensing material candidate for practical application. In addition, the facile superlattice nanoparticles fabrication method presented here could be extended to synthesize other ZnO-based superlattice material systems.
研究领域:
材料科学
·
传感器技术
·
纳米技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Xiao Xue,Hui Chen,Chongbo Zhang,Jiayu Li,Siwen Tao,Xinhua Tian,Ruiqin Gao,Meihong Fan,Ni Bai,Guo-Dong Li
n -butanol detection is crucial to environmental protection and mankind’s health because of its toxicity and irritation to the respiratory system. Mono-metal oxide semiconductors (such as SnO 2 ) often face disadvantages such as low sensitivity, insufficient selectivity, and a high detection limit. Constructing heterojunctions has been considered an efficient way to enhance the performance of MOS gas sensors. This work presents the synthesis of a series of β -CdSnO 3 -SnO 2 nanorod-like heterostructures with good n -butanol sensitivity using a hydrothermal and post-calcination approach. The optimized CSO/SO-8 shows the highest response value about 90–100 ppm n -butanol at 190 °C, which is 15 times greater than that of SnO 2 , and 6.5 times more than that of β -CdSnO 3 . Meanwhile, the CSO/SO-8 also exhibits a short response and recovery time (1–2 s/63 s). More importantly, the detection limit is reduced to ppb level (50 ppb). The improved gas-sensitive properties can be explained by the formation of n - n heterojunctions between β -CdSnO 3 and SnO 2 , which increases the content of chemisorbed oxygen, thus enhancing the performance of the gas-sensitive. Our work not only provides a material with n - n heterostructures but also the strategy for constructing heterojunctions to improve gas-sensitive properties.
研究领域:
材料科学
·
环境科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ji Yu,Li Li,Zishuang Yue,Zhenyu Yang,Jianxin Cai
In this work, a porous core–shell composite composed of reduced graphene oxide (rGO)-wrapped SnO 2 fibers (SnO 2 fibers/rGO composite) was fabricated through electrospinning assisted by pyrolysis. The special core–shell structure showed that porous SnO 2 fibers as the “core” were completely protected by multilayer rGO as the “shell.” Lithiation of SnO 2 occurred through Li diffusion through the rGO wrapped into the SnO 2 fibers, and natural void space facilitated SnO 2 expansion upon lithiation. This unique structure effectively prevented the aggregation and pulverization of SnO 2 fibers during lithiation and delithiation. The SnO 2 fibers/rGO composite electrode presented a super-high discharge capacity of 2,141 mAh g -1 at a current density of 0.4 A g -1 , 1,858 mAh g -1 at 0.8 A g -1 , 1,520 mAh g -1 at 1.6 A g -1 , and 874 mAh g -1 at 2.0 A g -1 after 10 cycles. The electrode showed a discharge capacity of 658 mAh g -1 at a current density of 4 A g -1 after 1,000 cycles.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yingyue Wang,Jinyang Huang,Wansheng Tang,Mengying Long,Zongwei Zhang,Hongli Liu,Dongmin An
In this work, an uncomplicated solvothermal method was used to synthesize NiO-SnO 2 gas sensing materials derived from bimetallic MOFs. The influence of MOF derived NiO-SnO 2 with different amount of Ni on the gas sensing performance of triethylamine (TEA) was systematically evaluated. The results showed that the MOF derived 0.5 mol% NiO-SnO 2 based gas sensor exhibited the best gas sensing performance. The response to TEA gas of the sensor reached 124.5 to 50 ppm at 170 °C, which was 1.5 times that of SnO 2 sensor (83). Compared with SnO 2 sensor at 190 °C, its operating temperature was reduced by 20 °C. Moreover, the MOF derived 0.5 mol% NiO-SnO 2 sensor also performed outstanding selectivity towards TEA, with a response that is 3.1–49.8 times higher than other target gases. The MOF derived NiO-SnO 2 nanomaterials were also conducted X-ray photoelectron spectroscopy and UV–visible absorption spectra analysis. The results demonstrated that an increase in specific surface area, abundant oxygen vacancies, a decrease in forbidden bandwidth, and the formation of p-n heterojunctions were significant factors in improving the gas sensing performance of MOF derived NiO-SnO 2 nanomaterials.
研究领域:
材料科学
·
化学传感器
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2017
·Vol. 4
·期 5
·055502
·
IF 1.068
Shaofeng Zhang,Jinggang Hao,Feng Ren,Wei Wu,Xiangheng Xiao
Combination of semiconductors with plasmonic nanostructures is an effective route to promote the solar light harvesting as well as the efficiency of photocatalysis. In the present work, the Au@SnO2 hybrid nanostructures with Au nanorods as the cores and highly crystallized SnO2 nanoparticles as the shells were fabricated by a facile hydrothermal method. A critical factor, which influences the coating state of the SnO2 shells over Au NRs, was found to be the concentration of CTAB agent in the system and the corresponding mechanism was also proposed. The photocatalytic activities of the Au@SnO2 nanohybrids were examined by degradation of rhodamine B (RhB) dyes at room temperature. The Au@SnO2 nanohybrids exhibited much higher catalytic activities than that of the commercial SnO2 NPs, which could be attributed to the localized electric field enhancement effect of Au nanorods plasmon and charges transfer between the Au nanorods and SnO2.
研究领域:
材料科学
·
纳米技术
·
光催化
✓ 已验证
DOI
高影响因子
Nanoscale
·
2011
·Vol. 3
·期 4
·1646-1652
·
IF 4.109
Zhipeng Li,Quanqin Zhao,Weiliu Fan,Jinhua Zhan
Porous SnO2 nanospheres with high surface areas have been synthesized through a solvothermal method in the absence of any templates. The structure and morphology of the resultant products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and nitrogen adsorption–desorption technique. The as-prepared SnO2 porous nanospheres with the diameters ranging from 90–150 nm are composed of small nanocrystals with average sizes of less than 10 nm. Results demonstrated that the formation of porous SnO2 nanospheres is ascribed to etching the center part of the nanospheres. It was found that hydrochloric acid and NaClO played important roles in determining the final morphologies of the porous SnO2 nanospheres. The gas sensing properties of the as-prepared porous SnO2 nanospheres were investigated. By the comparative gas sensing tests, the porous SnO2 nanospheres exhibited a superior gas sensing performance toward ppb level 2-chloroethanol and formaldehyde vapor, implying promising applications in detecting toxic volatile organic compounds (VOCs).
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yongkang Li,Feitong Ren,Jiayin Li,Yao Chen,Jun Liu,Chun Yang
Chloramphenicol (CAP) has demonstrated favorable therapeutic effects against various bacteria and is widely utilized in the aquaculture industry. However, CAP has recently been classified as a carcinogen, emphasizing the importance of developing effective methods to monitor its concentration. In this study, one-dimensional/two-dimensional (1D/2D) SnO 2 /reduced graphene oxide (rGO) composites were employed to modify a glassy carbon electrode (GCE) for the electrochemical detection of CAP. The SnO 2 /rGO composite materials were synthesized via a solution reaction and calcination method. Optimal electrochemical sensing conditions, including pH values, scan rates, and accumulation parameters, were systematically investigated to demonstrate feasibility. The resulting SnO 2 /rGO/GCE achieved a current density of 154.56 µA/cm², up to 75 times higher than other modified electrodes. Furthermore, the SnO 2 /rGO/GCE exhibited a strong linear relationship within a detection range of 0.001–100 μM and an excellent limit of detection of 0.315 nM for CAP. Finally, the electrodes with optimized modifications were successfully applied to determine CAP concentrations in real lake water and milk samples. These promising results suggest that the as-fabricated SnO 2 /rGO electrode presents a novel and highly effective approach for CAP detection.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Li Xiao,Shengrui Xu,Geng Yu,Shantang Liu
A novel gas microsensor combining SnO 2 submicron/nanostructured porous sensitive film with Micro-Electro-Mechanical systems (MEMS) microheater was successfully fabricated. The film was made of hierarchically mixed Pd/SnO 2 (HM-PTO) composites composed of Pd/SnO 2 hollow submicrospheres (Pd/SnO 2 -HSs) and Pd/SnO 2 nanoparticles (Pd/SnO 2 -NPs) deposited on the microheater platform using the microdispensing method. The as-prepared HM-PTO sensors exhibited high sensitivities, fast response/recovery rates, good selectivity, reliable reversibility, and relevant stability towards ethanol at low power consumption. The resulting superior sensing performances were attributed to the unique hierarchical structure. The internal void architecture of Pd/SnO 2 -HSs provided large specific surface areas, proper mesopore size distribution, large number of active adsorption/interaction sites, as well as promoted the chemisorption and dissociation of gas molecules due Pd-doping to yield superior gas response. In particular, the nano-sized SnO 2 particles ensured the uniform deposition of the materials to yield enhanced local conductivities, and possibly faster phase transfer reactions responsible for the extremely good response/recovery performance. This simple fabrication procedure combined with high sensing performances look promising for the development of hierarchical morphologies of novel materials for gas sensing applications.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Wei Liu,Ding Gu,Xiaogan Li
Detection of ultralow concentrations of the hazardous gases is the major demand and challenge for the development of biosensors. A novel mesoporous ZnSe-core/SnO 2 -shell microspheres based chemiresistive-type sensor was fabricated for ppb-level NO 2 detection, and the theoretical detection limit is calculated to be 0.87 ppb. The as-fabricated sensor presents an excellent performance for low-concentrations of NO 2 up to 2.4 ppm and exhibits significantly higher response approximately 6.94 than those of pristine SnO 2 (∼2.86) and ZnSe based sensors (almost no response) to 2.4 ppm NO 2 at 160 °C. The response and recovery time of the core-shell microspheres based sensor are 64 s and 52 s, respectively, which are substantially improved compared to those of the pristine SnO 2 based sensor (∼149 s and ∼133 s). The sensor demonstrates a superior long-term stability with a deviation in the response of the sensor less than 5 % for one month, and a brilliant selectivity to several possible interferents. The significantly improved sensing performance could be attributed to the obtained mesoporous structures and the formed ZnSe/SnO 2 hybrid interfaces. It yields more active sites and promotes the electrons transferred between ZnSe and SnO 2 nanocrystals. The density functional theory (DFT) calculations are employed to reveal the potential transducing mechanisms.
研究领域:
材料科学
·
环境科学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 13
·D638
·
IF 3.12
Pengfei Xu,Xiaohong He,Junwei Mao,Yongming Tang
In this paper, Ti/SnO2-Sb/Ce-PbO2 anode is electrodeposited from MSA bath, and the effect of Ce3+ concentration in bath on the phase composition and morphology of lead dioxide electrode is elucidated. It is found that with the addition of 2 mM Ce3+ ion to the bath the Ce-PbO2 anode exhibits highest stability in 0.5 M H2SO4, and cerium exists as Ce (IV) in the PbO2 film. The electrocatalytic activity of lead dioxide anode for phenol removal is slightly enhanced by the inclusion of Ce. The significant improvement in electrocatalytic activity can be achieved by the addition of small amount of Bi3+ ion to the bath containing Ce3+ ion. In this study, electrocatalytic activities of various anodes follow the order: Ce,Bi-PbO2 > Ce-PbO2 > undoped PbO2 > Bi-PbO2.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2021
·Vol. 25
·期 5
·1541-1553
·
IF 2.647
Zeng Laiyuan,Wei Xuefeng,Miao Juan,Zhang Ruichang,Zhang Jun,Zhou Ming,Lu Weiwei
A Sb-doped SnO 2 anode modified with Ni and B was fabricated by the sol–gel method. The effect of major operation parameters of electrode preparation, such as Ni content, B content, and calcination temperature, on the mineralization degree of phenol was investigated. Response surface methodology was used to optimize the experimental conditions and evaluate the association between various operation parameters. The morphology, crystal structure, and electrocatalytic performance of the prepared SnO 2 –Sb–Ni–B anodes were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), linear sweep voltammetry (LSV), and cyclic voltammetry (CV). The optimized sol–gel preparation ratio of citric acid, ethylene glycol, tin tetrachloride, antimony trichloride, nickel chloride, and boric acid was 650:200:100:6.5:0.5:2, and the calcination temperature of the electrode was 550 °C. The SnO 2 –Sb–Ni–B anode has the highest oxygen evolution potential of 1.63 V (vs. Hg 2 /Hg 2 SO 4 ). The removal degree of phenol reached 58% within 2 h on the SnO 2 –Sb–Ni–B anode. The accelerated lifetime of the selected SnO 2 –Ni–B anode was 720 min, which was carried out in a 3-mol/L sulfuric acid solution with a current density of 500 mA/cm 2 .
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
OPTIK
·
2021
·
IF 2.443
Beiping Dong,Yanan Gao,Juncheng Liu
High transmittance and strong dust-removing film has a broad potential application prospect in architectural glass, solar photovoltaic glass, automotive glass, etc. In this paper, SnO 2 is used as the antistatic agent, and SiO 2 as the matrix. The effects of Sn/Si molar ratio on the structure and properties of the SnO 2 -SiO 2 film prepared on quartz glass substrate with sol-gel dipping were studied. The film was analyzed by X-ray diffractometer (XRD), Fourier transform infrared (FTIR) spectroscopy and Scanning electron microscopy (SEM). Ultraviolet-Visible-Near Infrared Spectrometer (UV–VIS–NIR) and Hall effect instrument tested the photoelectric properties. Falling dust experiment was used to determine the film’s dust-removing property. The results show that the SnO 2 -SiO 2 film is composed of nano particles of SnO 2 tetragonal rutile phase and amorphous SiO 2 , and has antistatic dust-removing property. With the increase of Sn/Si molar ratio, the crystallization quality and average grain size of the film increases, while the square resistance decreases continuously. The visible transmittance fluctuates with an amplitude of no more than 1.2%, and obtained the minimum value 87.246% at Sn/Si molar ratio of 2:1. Moreover, the film’s dust-removing performance improves continuously, which obtained the best, 50%, at Sn/Si molar ratio of 2:1.
研究领域:
材料科学
·
光学工程
·
表面科学
✓ 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）