SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Di Liu,Zilong Tang,Zhongtai Zhang
SnS 2 is a promising candidate for NO 2 sensing applications due to its suitable band gap and large electronegativity. However, SnS 2 based gas sensors are still restricted to detect NO 2 gas at room temperature due to their giant resistance and poor recovery. Here, we report hollow SnO 2 @SnS 2 nanostructures prepared by a one-step hydrothermal method. The SnO 2 @SnS 2 based sensor showed high response and good recovery to ppb-level NO 2 under visible illumination at room temperature (25 °C). The superior sensing performance of the SnO 2 @SnS 2 sensor was attributed to the hollow porous heterojunction structure beneficial for gas diffusion, as well as visible light assistant facilitating charge transfer and gas desorption. This work systematically studied the influence of oxygen concentration in background gas on the NO 2 sensing performance of the SnO 2 @SnS 2 sensor, and proposed a physical adsorption model for the NO 2 sensing mechanism of the SnO 2 @SnS 2 sensor under visible light at room temperature. In addition, the effect of humidity on the gas sensing performance of the SnO 2 @SnS 2 sensor to different concentrations of NO 2 was also discussed.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2017
·Vol. 4
·期 9
·2308-2313
·
IF 4.136
Ke Wang,Ying Huang,Xiulan Qin,Mingyue Wang,Xu Sun,Meng Yu
Graphical Stress relief : A facile two-step hydrothermal route is introduced to prepare hollow SnO 2 /SnS 2 hybrids. Subsequently, their electrochemical performances as anodes in Na-ion batteries are investigated. The as-prepared hollow SnO 2 /SnS 2 hybrids are composed of ultrafine SnS 2 nanosheets, which directly grow on the pre-grown hollow SnO 2 hollow spheres. In the structure, both the SnO 2 hollow structures and surrounding SnS 2 nanosheets are able to alleviate internal stress during sodiation/desodiation. Alloying-type Sn material has been considered as an excellent anode material for sodium-ion batteries (SIBs). However, the limitation of capacity is still a challenge that remains to be solved. In this approach, we introduce a facile two-step hydrothermal route to prepare hollow SnO 2 /SnS 2 hybrids and investigate their electrochemical performances as anodes in SIBs for the first time. Benefiting from their structural features, the hollow SnO 2 /SnS 2 hybrids exhibit a high reversible sodium storage capacity of about 485.64 mA h g −1 at 300 mA g −1 after 100 cycles with a capacity retention of 78.7 %, which is much higher than 25.9 % for bare SnO 2 hollow spheres and 28.5 % for bare SnS 2 nanosheets. Taking into consideration the outstanding performance and the special structural design, this work could provide a potential strategy to improve the electrochemical performances of tin-based electrodes, as well as that of other anodes in SIBs.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xinyu Hu,Juntao Wang,Jing Wang,Kehui Xue,Ting Yang,Yi Peng,Ying Yan,Hongbo Xiao,Wenlei Wang
Controlling the migration behavior of photogenerated carriers by designing the microstructure of materials remains a significant challenge. In this work, the solvothermal method was used to fabricate a SnO 2 /SnS 2 heterojunction anchored on biochar through −C Sn− bonds between biochar and SnS 2 , as demonstrated by X-ray photoelectron spectroscopy characterization. DFT calculations further confirmed −C Sn− bonds can shorten theoretical band gap of SnS 2 @biochar from 1.01 eV to 0.66 eV and provide a pathway for swift electron migration, which can effectively modulate the separation of photo-induced carriers and promote the generation of e − and h + . Additionally, the oxalate activated by −C Sn− bonds can effectively capture h + and produce abundant ∙CO 2 – free radicals. When the obtained composites were used as photocatalysts , Cr(VI) was thoroughly reduced by the SnO 2 /SnS 2 @biochar composite with a molar ratio of SnO 2 and SnS 2 of 2 within 20 min under visible light irradiation when oxalate was 1.0 mM (CSO-2/H 2 C 2 O 4 -1). Furthermore, CSO-2/H 2 C 2 O 4 -1 exhibited excellent reusability, and the degradation efficiency of Cr(VI) remained above 91.71% after five cycles. The remarkable photocatalytic properties can be ascribed to the synergistic effects of e − and ∙CO 2 – . This work proposes a new strategy for the preparation of an applied photocatalyst with a high separation rate of photoinduced carriers.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·
IF 11.9
Zhenkuang Lei,Mingqiang Ning,Xueheng Zhuang,Qikui Man,Baogen Shen
The engineering of heterogeneous interfaces is an effective way to develop high-performance electromagnetic wave (EMW) absorbing materials. In this work, density functional theory (DFT) calculations were used to predict the SnO2/SnS2 heterointerface effect for boosting electromagnetic wave loss. Then a method for constructing SnO2/SnS2 heterostructures by modulating the SnO2 precursor on carbon cloth (CC) with controlled sulfurization is proposed. Benefiting from the introduction of SnO2/SnS2 heterostructures, the S-2 absorber achieves a minimum reflection loss (RLmin) of −50.9 dB and maximum EAB up to 4.18 GHz with a matching thickness of 5.0 mm and 1.5 mm. Moreover, the materials also exhibit strong hydrophobicity and high electrical conductivity, giving them potential applications such as self-cleaning, and good electrical and thermal properties. This study provides an insight into the mechanism of heterogeneous interfaces for enhancing the attenuation capability of EMW and opens avenues for developing high-performance absorbers.
研究领域:
材料科学
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电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Yaoguang Wang,Dawei Fan,Guanhui Zhao,Jinhui Feng,Dong Wei,Nuo Zhang,Wei Cao,Bin Du,Qin Wei
An ultrasensitive label-free photoelectrochemical (PEC) immunosensor with high visible-light activity was developed for quantitative detection of amyloid β-protein (Aβ) by cross-linking anti-Aβ antibody onto the Ag 2 S sensitized SnO 2 /SnS 2 nanocomposites . Specifically, SnO 2 with flower-like porous nanostructure was innovatively applied in PEC immunosensor as a basal material. It could form a heterostructure with SnS 2 , which brought about the sensitization of SnO 2 and enhanced the separation of photogenerated electrons and holes. Moreover, Ag 2 S was in-situ growth on the surface of SnO 2 /SnS 2 , which further enhanced the photocurrent response significantly. Therefore, SnO 2 /SnS 2 /Ag 2 S could form stepwise band-edge structure, which benefited the light harvesting and provided a good foundation for sensor construction and detection. Under optimal conditions, the PEC immunosensor was used to detect the content of Aβ and exhibited a wide linear concentration range from 0.5 pg mL −1 to 100 ng mL −1 , with low limit of detection (0.17 pg mL −1 ) and limit of quantification (0.56 pg mL −1 ). Additionally, the designed PEC immunosensor exhibited good reproducibility, specificity, and stability which may find potential applications in the biosensor, biomedicine , clinical diagnosis, photocatalysis and other related fields.
研究领域:
生物传感器
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生物医学
·
临床诊断
·
光催化
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产品关联
DOI
PubMed
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.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yongjing Guo,Hangshuo Feng,Fan Zhao,Li Yang,Qiuni Zhao,Dongyang Li,Shunping Zhang,Yi Xia,Ming Hou,Shenghui Guo
Controlling the morphology to modify the properties of materials is an effective strategy to enhance the response performance of gas sensing materials. Herein, a three-dimensional (3D) nanoflower-like tin disulfide (SnS 2 ) structure assembled from nanosheets was synthesized. Subsequent annealing treatment partially oxidizes the nanosheets, inducing random stacking of the nanosheets, thereby increasing the structural disorder analogous to opened hair cuticle. This structure was further decorated by zero-dimension (0D) palladium nanoparticles (Pd NPs) to construct 0D-3D hierarchical structure for hydrogen (H 2 ) detecting. The H 2 sensing experiment results showed that optimized Pd/SnO 2 /SnS 2 gas sensor exhibits a high response of 1260% to 1000 H 2 at 275 °C, along with fast response/recovery time of 18/67 s. The gas sensor exhibited a low limit of detection (1.74 ppm). The above sensing performance is attributed to the unique hierarchical assembled nanoflower-like architecture, which was transformed from an initial closed hair-cuticle-like morphology into an open one by annealing. This newly formed open structure, coupled with the composite formation with Pd NPs, collectively facilitates both the carrier charge transfer process and the adsorption/desorption reaction of H 2 . This work demonstrates a promising strategy for developing high-performance H 2 sensors through morphology-engineered and noble metal-functionalized transition metal dichalcogenides.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Wenyuan Yang,Limin Qiu,Xintong Liu,Tingting Wang,Tianqi Wang,Dan Li,Hui Yu,Ying Yang
The development of portable, low-power H 2 S sensors is critical for environmental safety but remains challenged to balance high sensitivity with mechanical flexibility at room temperature. Herein, we present a hierarchical SnO 2 /SnS 2 nanoflower composite synthesized via a facile in-situ sulfidation strategy, which ensures intimate lattice coherence for robust flexible sensing. The optimal sensor on a PET substrate exhibits a high response of 19.01 to 10 ppm H 2 S at 25 °C, a low theoretical detection limit of 95.38 ppb, and excellent mechanical stability under 90° bending. Mechanistically, Mott-Schottky analysis confirms that SnO 2 /SnS 2 heterojunctions induce a 50-fold increase in carrier concentration. This electronic modulation extends the Debye length (24.4 nm) beyond the average crystallite size (16.9 nm), creating a volume depletion state in ambient air that enables massive resistance modulation upon H 2 S exposure. This work demonstrates a robust flexible sensor and establishes a quantitative criterion for heterojunction design through Debye length engineering.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Shuqing Nie,Chang Miao,Shi Pan,Guocheng Li,Yu Duan,Wei Xiao
Tin dioxide (SnO 2 )-based materials with renowned conversion-alloying hybrid mechanism represent great potential as anodes for next-generation lithium-ion batteries (LIBs). Nevertheless, their commercial applications are still plagued by fast capacity decay and insufficient rate capability originated from sluggish reaction kinetics and irreversible conversion reaction. Herein, heterogeneous SnO 2 /SnS 2 quantum dots are carefully constructed on graphene oxide (SnO 2 /SnS 2 QDs@GO) via one-step hydrothermal synthesis leveraging well-matched bandgaps of SnO 2 and SnS 2 , in which GO not only provides enough negative charges to restrict the nucleation of QDs, but also is employed as robust conductive network to reinforce the structural stability of the electrode. Experimental and first-principles calculation results confirm that the constructed heterointerface promotes electronic conductivity and accelerates interfacial charge transfer kinetics while simultaneously lowering Li 2 O decomposition energy barrier to realize high reaction reversibility, ultimately favoring excellent rate capability and cyclability. Moreover, the built-in electric field induced by SnO 2 /SnS 2 heterojunction greatly boosts electronic/ionic transport kinetics. Endowed with the elaborate structure combining intrinsic and extrinsic advantages, the cell assembled with SnO 2 /SnS 2 QDs@GO electrode presents high reversible capacity of 1216.9 mAh g −1 after 100 cycles at 0.1 A g −1 and desirable long-cycle stability over 1500 cycles at 5.0 A g −1 . Therefore, this work may provide new insights into engineering semiconductor-based heterojunction anode for advanced LIBs.
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DOI
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 11
·1-15
·
IF 6.408
Qin Dongmiao,Meng Shuo,Wu Yusheng,Luo Zhi,Deng Biyang
An efficient electrochemiluminescence resonance energy transfer (ECL-RET) method is proposed which combines the luminescent materials of tris(4,4′-dicarboxylicacid-2,2′-bipyridyl) ruthenium(II) (energy donor) and tin dioxide and tin disulfide quantum dots (SnO 2 /SnS 2 QDs) (energy acceptor) into the isoreticular metal − organic framework-3 (IRMOF-3) material to form a composite. In this mode, the distance between the energy donor and the acceptor was greatly shortened, reducing the energy loss, and thereby effectively improving RET efficiency and further significantly improving the ECL signal. The obtained composite (SnO 2 /SnS 2 QDs-Ru@IRMOF-3) was combined with sandwich immunoreaction to construct an ECL immunosensor for the sensitive detection of procalcitonin (PCT). Under the optimized experimental conditions with a working potential of − 1.48 V (vs Ag/AgCl), the proposed PCT biosensor exhibited a linear concentration range of 1 × 10 −4 –200 ng mL −1 , with a detection limit of 0.029 pg mL −1 ( S / N = 3). The biosensor was used to detect PCT in actual samples. The biosensor has broad application prospects in biological analysis and clinical diagnosis due to its high sensitivity, good selectivity, and good stability. Graphical abstract
研究领域:
分析化学
·
生物传感器
·
临床诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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