JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Zhengyou Zhu,Congcong Liu,Fengxing Jiang,Jing Liu,Xiumei Ma,Peng Liu,Jingkun Xu,Lei Wang,Rui Huang
Rational and smart design of hydrogen (H 2 ) sensors especially those featured with flexibility and light weight is highly desirable, to meet the requirements for future development of portable H 2 sensors. In this work, we demonstrate a novel paper film H 2 sensor employing Ti 3 C 2 T x MXene nanosheets with Pd colloidal nanoclusters (Pd CNC) as the activator. The MXene@ Pd CNC paper film was facilely prepared via an all-colloidal solution-based vacuum-filtration process, which is flexible, light-weight and endowed with a compact, glossy surface. The as-obtained MXene@ Pd CNC film sensor displayed moderate H 2 response at room temperature at either flat or bent states. Specially, the MXene@Pd CNC film sensor delivered a response time of (32 ± 7) s and a sensitivity of S = (23.0 ± 4.0)%@4% H 2 . In addition, the MXene@Pd CNC sensor enabled “in-situ-mode” H 2 detection directly along a piece of paper film with desired size. The strong H 2 adsorption into lattice of ultrafine Pd CNC altered the work function thus induced the electron doping of MXene, which explained the gas sensing mechanism. Therefore, the facilely designed MXene@Pd CNC sensor is believed to contribute to development of future portable and wearable sensing electronics.
研究领域:
材料科学
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传感器技术
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纳米科技
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 40
·23038-23045
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IF 10.733
Rongrong Pan,Jia Liu,Yuemei Li,Xinyuan Li,Erhuan Zhang,Qiumei Di,Mengyao Su,Jiatao Zhang
Here we show a novel strategy for tailoring the synergistic electrical properties of metal@semiconductor hybrid nanocrystals (HNCs) based on cation exchange-enabled electronic doping. As a demonstration, the conductive nature of Au@CdS core–shell HNCs was changed from n- to p-type by introducing Cu dopants into the CdS shell. The dependence of the conductivity type on the dopant concentration in the HNCs is disclosed by combined photoelectrochemical (PEC) studies. Moreover, a tandem PEC cell consisting of an undoped Au@CdS photoanode and a Cu-doped Au@CdS photocathode respectively modified with cocatalysts is fabricated, which displayed stable H2 and O2 evolution in unassisted PEC overall water splitting.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
·
2024
·Vol. 59
·期 12
·1176-1182
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IF 1.1
Jianping Zhang,Zhu Yahua,Yin Gengwen,Hou Wenlong,Zhang Haiquan
Perylene diimide radical anions (PDI –• ) prepared by through photoelectric doping are capable of reducing aromatic halides and achieving aromatic hydrocarbon coupling. The active of electrically doped PDI –• is dependent on the conditions of electroreduction (e.g. electrode material), but little attention has been paid to the influence of electrode material, voltage, and electroreduction time on the activity of PDI –• . In this paper, we compared the active of PDI –• produced by different electrode materials, different reduction voltages and different reduction times based on the difference in UV-vis absorption spectra. In contrast to the characteristic absorption spectra of the anion of the PDI –• , the metal electrodes with certain reducing properties, such as zinc and magnesium, stabilize the radical anion and reduce the PDI –• activity due to the generation of positive zinc and magnesium ions during the electroreduction process.
研究领域:
电化学
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有机合成
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材料化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Zhiliang Li,Zheng Su,Hongxia Zhang,Qing Wang,Jianglong Wang,Xin Qian,Qian Cao,Zhihai Ding,Jing-Feng Li,Shufang Wang
Higher manganese silicide (HMS) is a naturally abundant, environmentally friendly, and mechanically robust P-type thermoelectric (TE) semiconductor. Isoelectronic doping elements Re and Ge are used to partially occupy cation (Mn) and anion (Si) sites, respectively. Compared with the single Re-doped strategy, TE performance is further improved in the isoelectronic double-doped Mn 0.96 Re 0.04 (Si 0.96 Ge 0.04 ) 1.79 composition. The electrical conductivity (∼54.2 × 10 3 S m –1 at 823 K) is double that of pure HMS (∼26.1 × 10 3 S m –1 ), whereas the power factor increases from ∼1.42 × 10 –3 W m –1 K –2 to ∼1.80 × 10 –3 W m –1 K –2 due to the increase in carrier concentration caused by the decreased band gap (from 0.82 eV to 0.74 eV), as well as the embedding of the Si, Ge nanodispersions with low work functions. Furthermore, the substitution of Re and Ge increases the amounts of lattice defects, and the presence of nanoscale Ge precipitates cause the broadband phonon-scattering effect in the HMS matrix. Finally, the lattice thermal conductivity at 673 K decreases from ∼2.18 W m –1 K –1 to ∼1.60 W m –1 K –1 . The zT value at 823 K increases by ∼36% from 0.45 to 0.61. The strategy of cation and anion double doping can effectively improve the TE properties of materials, which has significance for the optimization of other materials.
研究领域:
材料科学
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热电学
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
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