LANGMUIR
·
2024
·
IF 3.7
Xiaotian Zhang,Zipeng Jin,Kunting Li,Yisheng Hu,Lei Xu,Baiyan Li
Despite their high surface area, remarkable porosity, and efficient charge transfer mechanisms, conductive MOFs have found limited utilization within the domain of photocatalysis. In this study, we synthesized a cutting-edge S-type Ni3(HITP)2/TiO2 heterojunction photocatalyst exhibiting outstanding light harvesting and prolonged lifetime of photogenerated electrons through an in situ synthesis approach. Compared with TiO2, the composite materials not only significantly increase the specific surface area by 4.07 times but also expand the visible light absorption edge from 400 to 1100 nm. The hydrogen production rate of Ti/Ni-3 reached 4.927 mmol·g–1·h–1, which is 4.51 times that of TiO2. The S-type interface charge transfer pathway of the Ni3(HITP)2/TiO2 composite material was inferred by band structure, in situ XPS, SPV, and free radical capture, which improves charge separation and extends the carrier lifetime to undergo directional migration driven by an IEF. This is the main reason for the improved photocatalytic performance of Ni3(HITP)2/TiO2 composite materials.
研究领域:
材料科学
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光化学
·
催化
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产品关联
DOI
PubMed
高影响因子
Science Bulletin
·
2020
·
IF 9.511
Weiwei Zhao,Tiantian Chen,Weikang Wang,Beibei Jin,Jiali Peng,Shuaihang Bi,Mengyue Jiang,Shujuan Liu,Qiang Zhao,Wei Huang
The flexible transparent supercapacitors have been considered as one of the key energy-storage components to power the smart portable electronic devices. However, it is still a challenge to explore flexible transparent capacitive electrodes with high rate capability. Herein, conductive Ni 3 (HITP) 2 (HITP = 2,3,6,7,10,11-hexaiminotriphenylene) thin films are adopted as capacitive electrodes in flexible transparent supercapacitors. The Ni 3 (HITP) 2 electrode possesses the excellent optoelectronic property with optical transmittance ( T ) of 78.4% and sheet resistance ( R s ) of 51.3 Ω sq –1 , remarkable areal capacitance ( C A ) of 1.63 mF cm −2 and highest scan rate up to 5000 mV s −1 . The asymmetric Ni 3 (HITP) 2 //PEDOT:PSS supercapacitor ( T = 61%) yields a high C A of 1.06 mF cm −2 at 3 μA cm −2 , which maintains 77.4% as the current density increases by 50 folds. The remarkable rate capability is ascribed to the collaborative advantages of low diffusion resistance and high ion accessibility, resulting from the intrinsic conductivity, short oriented pores and large specific areas of Ni 3 (HITP) 2 films.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yongjiao Sun,Jun Li,Yuchen Hou,Bingliang Wang,Wendong Zhang,Koichi Suematsu,Lin Chen,Jie Hu
Electrically conductive metal-organic frameworks (EC-MOFs) exhibit significant potential application as sensing materials for chemical resistance gas sensors. Herein, we developed a flexible gas sensor based on Ni 3 (HITP) 2 nanosheets co-functionalized with noble metal nanoparticles (NPs) and WS 2 quantum dots (QDs) for NO 2 detection at room temperature. The gas sensing performance was regulated by optimizing the metal species and loading ratios of WS 2 QDs. The measured results revealed that Au NPs and 2 mol% WS 2 achieved the most effective enhancement for NO 2 sensing performance. Therefore, Au NPs was selected to optimize WS 2 -2/Ni 3 (HITP) 2 sensor for further improving the sensing properties. A unique hierarchical structure based on gas sensor (Au 3 @WS 2 -2/Ni 3 (HITP) 2 sensor) enables high response (14.73 % to 5 ppm NO 2 ), rapid response/recovery time (97 s/110 s), good selectivity, anti-humidity, repeatability, long-term stability as well as flexibility at room temperature. Furthermore, density functional theory (DFT) and band theory were employed to comprehend adsorption energies and the electronic structures at atomic scale, elucidating the intrinsic correlation between NO 2 adsorption behavior and Ni 3 (HITP) 2 surface and the sensitization mechanism of heterostructures. These findings provide novel insights for designing high-performance NO 2 gas sensors worked at room temperature and guidance for EC-MOFs sensing mechanism.
研究领域:
材料科学
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化学传感
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理论计算
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产品关联
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 4
·2375-2385
·
IF 2.4
Cao Lin-an,Wei Min,Guo Xin,Wang Dailian,Chen Lu,Guo Jing
Ni 3 (HITP) 2 (HITP: 2,3,6,7,10,11-hexaiminotriphenylene) is a very typical 2D electrically conductive metal–organic framework (EC-MOF) material with great promising as active materials in electronic devices. Gas–liquid interface self-assembly is a common method of processing free-standing thin films for this EC-MOF. Owing to the different contact environment during growth process, Ni 3 (HITP) 2 film prepared by gas–liquid interface method has different morphology for up-side surface exposed to air and down-side surface infiltrated in solution. However, the asymmetrical morphology of Ni 3 (HITP) 2 film and its influence on sensing performance have never been implemented. In this work, gas–liquid interface self-assembly method is used to obtain an asymmetrical Ni 3 (HITP) 2 nanofilm in surface morphology with a flat up-side surface and an island-like down-side surface. The surface morphology of as-prepared film has a remarkable influence on the glucose sensing property. The island-like structure for down-side surface film exhibits more excellent glucose sensing performance because of its abundant crystal defect which play an important role in enhancing glucose catalytic oxidation capacity. Graphical abstract
研究领域:
材料科学
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纳米技术
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传感器
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电化学
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DOI
高影响因子
RARE METALS
·
2025
·
IF 11
Han Ya,Yu Ying-Jian
Tin–air batteries (TABs) exhibit high safety and low cost, and are expected to be used in electric vehicles and portable electronic devices. However, challenges such as the irregular deposition of tin (Sn) particles on Sn anodes, surface passivation, and significant hydrogen evolution have hindered the development of high-performance TABs. To address these challenges, this study introduces quasi-solid TABs (QSTABs) with satisfactory high-temperature resistance. A conductive metal–organic framework (c-MOF), particularly Ni 3 (HITP) 2 , was synthesized and deposited onto the Sn anode surface. The porous structure of c-MOF increased the specific surface area of the Sn anode, improved electronic conductivity and facilitated the absorption and release of ions during charge and discharge cycling. Theoretical calculations revealed that Ni 3 (HITP) 2 provided more electron donor sites to coordinate with Sn 2+ and inhibited hydrogen release. Additionally, carboxymethyl cellulose (CMC) was incorporated into the organic gel polymer electrolytes (OGPEs) to significantly enhance their water retention, ensuring stable operation of QSTABs between 25 and 50 °C. Notably, QSTABs assembled with CMC-OGPE/Sn@Ni 3 (HITP) 2 exhibited a fine cycle life of over 200 cycles at 50 °C. The electronic c-MOF material effectively inhibited metal shedding and side reactions on the Sn anode. These findings provide valuable guidance for developing QSTABs with high-temperature resistance. Graphical abstract
研究领域:
储能
·
材料科学
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电化学
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电池技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 23
·9633-9645
·
IF 4.5
Hu Rongqin,Mu Zhaode,Gong Feng,Qing Min,Yuan Yonghua,Bai Lijuan
Human epididymis protein 4 (HE4) is a highly sensitive and specific biomarker for diagnosing ovarian cancer. In this work, a new electrochemical aptasensor for rapid and sensitive detection of HE4 was constructed. Firstly, metal–organic framework/ketjen black (NH 2 -MIL-53(Al)/KB) composite with abundant amino groups and large specific surface area was prepared as signal amplifier to anchor gold nanoparticles (AuNPs). Subsequently, signal probe (SP) and a large amount of electroactive toluidine blue (Tb) were attached on AuNPs to form the tracer label, producing a distinct electrochemical detection signal. Moreover, Ni 3 (HITP) 2 was modified by poly(diallyldimethylammonium chloride, PDDA) to obtain PDDA/Ni 3 (HITP) 2 , and then it was covered with deposited gold nanocrystals (DpAu) to form the sensing platform, which increased the electrical conductivity, specific surface area and the loading of triple-helix assembled probes (TAP). Target HE4 was bound to its aptamer in the outer layer of the TAP, leaving a separate capture probe (CP) on the electrode surface that can bind with the tracer label. The proposed aptasensor for HE4 detection showed a wide linear range from 1 to 10 nM with a detection limit of 0.41 fM. In addition, the aptasensor has good selectivity, stability and reproducibility. More importantly, this method showed satisfactory results in clinical serum sample analysis compared with ELISA, possessing application prospects in ovarian cancer diagnosis.
研究领域:
生物传感器
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分析化学
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纳米技术
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癌症诊断
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电化学
✓ 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）