INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·
IF 3.205
Yu-Jie Zhong,Hong-Bin Dai,Min Zhu,Ping Wang
Hydrous hydrazine (N 2 H 4 ⋅H 2 O) has attracted considerable interest as a potential hydrogen carrier for vehicular or portable applications. But currently, most of published experimental works focus on dilute N 2 H 4 ⋅H 2 O solution with a limited hydrogen capacity to 2 wt%, which is well below the practical requirements. Herein, we report the catalytic decomposition of concentrated N 2 H 4 ⋅H 2 O solution over a La 2 O 3 -supported Ni Pt alloy catalyst . The Ni Pt/La 2 O 3 catalyst prepared by a one-pot co-precipitation method shows exceptionally high catalytic activity and 100% selectivity towards hydrogen generation from N 2 H 4 ⋅H 2 O at ambient temperatures. In particular, our study has demonstrated, for the first time, that the system composed of concentrated N 2 H 4 ⋅H 2 O solution, high-performance Ni Pt/La 2 O 3 catalyst and appropriate amount of alkali promoter can yield a material-based hydrogen capacity of 6 wt%. This finding is of clear significance for promoting the practical application of N 2 H 4 ⋅H 2 O as a viable hydrogen carrier.
研究领域:
化学工程
·
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Ling-Juan Yan,Chen Jiang,Ai-Ying Ye,Qiong He,Cheng Yao
Hydrazine plays an important role in chemistry, pharmaceuticals, agriculture and aerospace. However, it is not to be underestimated and has been identified as harmful to the human body. Therefore, it is significant and urgent to develop the detection of hydrazine in vivo and in vitro. Here, the probe TAN was synthesized by using benzothiazole derivatives as the fluorophore and 2,3-diaminomaleonitrile as the identified group to detect hydrazine. The presence of hydrazine resulted in a colorimetric and ratiometric fluorescence response of the probe based on the formation of hydrazone. The detection limit of TAN was 0.31 µM for hydrazine. In addition, the probe TAN was successfully used to visualize hydrazine in living HepG-2 cells and mouse with low cytotoxicity and excellent biocompatibility.
研究领域:
分析化学
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生物医学工程
·
毒理学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2014
·
IF 2.93
O. Song-Il,Jun-Min Yan,Hong-Li Wang,Zhi-Li Wang,Qing Jiang
CeO x -induced amorphization of CoPt nanoparticles (NPs) is achieved by a facile co-reduction method using sodium borohydride (NaBH 4 ) as the reducing agent at room temperature (298 K) under ambient atmosphere. The investigation results indicate that CeO x plays a critical role in transferring the crystalline CoPt nanoalloy into the amorphous one. To our surprise, the resultant Co 0.65 Pt 0.30 (CeO x ) 0.05 NPs exhibit high catalytic kinetic performance with 72.1% hydrogen (H 2 ) selectivity for the H 2 generation from hydrous hydrazine (N 2 H 4 ) within only a few minute at 298 K. Although complete conversion is not achieved, but the initial turnover frequency value of 194.8 h −1 for the present amorphous catalyst is much higher than that of crystalline one. Moreover, such a highly rapid catalyst may greatly encourage the practical application of hydrous N 2 H 4 as a hydrogen storage material.
研究领域:
材料科学
·
催化化学
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DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2024
·
IF 15.7
Xiao Chen,Yunmei Du,Yu Yang,Kang Liu,Jinling Zhao,Xiaodan Xia,Lei Wang
ABSTRACT Directional construction of crystalline/amorphous (c/a)-phosphosulfide heterostructures with exceptional intrinsic activity through a facile strategy is challenging. In this study, we synthesized q-CoPS nanorods with a unique c/a-CoPS core-shell heterostructure through the ‘gas-phase phosphorus vulcanization-quenching' treatment. This work also innovatively masters the regulation of the initial quenching temperature to alter the c/a ratio of the CoPS nanorods . Surprisingly, with increasing initial quenching temperature, the area of the amorphous CoPS shell gradually increases. Density functional theory calculations reveal that the Co sites at the c/a-heterointerface, as the difunctional c/a-interface active site, effectively optimize the kinetics of the hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR). As anticipated, q-CoPS/CF requires an overpotential of only 90 mV at a current density of 1000 mA cm –2 for the alkaline HER, which is much lower than that required using the state-of-the-art Pt/C catalyst. Additionally, q-CoPS/CF achieves a current density of 1000 mA cm –2 at only 0.06 V in the HzOR. Overall, this work proposes an efficient strategy for developing a bifunctional electrocatalyst with a unique c/a-heterostructure to address future energy needs.
研究领域:
材料科学
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电化学
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能源材料
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·1-11
·
IF 5.578
Yao Qilu,Lu Zhang-Hui,Yang Kangkang,Chen Xiangshu,Zhu Meihua
Ultrafine ruthenium nanoparticles (NPs) within the mesopores of the SBA-15 have been successfully prepared by using a “double solvents” method, in which n -hexane is used as a hydrophobic solvent and RuCl 3 aqueous solution is used as a hydrophilic solvent. After the impregnation and reduction processes, the samples were characterized by XRD, TEM, EDX, XPS, N 2 adsorption-desorption and ICP techniques. The TEM images show that small sized Ru NPs with an average size of 3.0 ± 0.8 nm are uniformly dispersed in the mesopores of SBA-15. The as-synthesized Ru@SBA-15 nanocomposites (NCs) display exceptional catalytic activity for hydrogen generation by the hydrolysis of ammonia borane (NH 3 BH 3 , AB) and hydrazine borane (N 2 H 4 BH 3 , HB) at room temperature with the turnover frequency (TOF) value of 316 and 706 mol H 2 (mol Ru min) −1 , respectively, relatively high values reported so far for the same reaction. The activation energies ( E a ) for the hydrolysis of AB and HB catalyzed by Ru@SBA-15 NCs are measured to be 34.8 ± 2 and 41.3 ± 2 kJ mol −1 , respectively. Moreover, Ru@SBA-15 NCs also show satisfied durable stability for the hydrolytic dehydrogenation of AB and HB, respectively.
研究领域:
纳米催化
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能源材料
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无机化学
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氢气储存与释放
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多相催化
✓ 已验证
DOI
高影响因子
Micro & Nano Letters
·
2021
·Vol. 16
·期 9
·478-483
·
IF 1.102
Shi Li,Wenshuai Feng,Xiaohui Gao,Aimin Guo,Hongjian Li
An effective and rapid method for the detection of hydrazine hydrate is urgently needed as a result of its high toxicity and extensive use. Here, copper nanoparticles supported on carbon (written as: Cu NP/C) and copper oxide polycrystalline solids (written as: CuO PS), synthesized by calcining the same metal–organic framework at high temperature, were respectively used as electrode materials for electrochemical sensing hydrazine. The results show that the prepared Cu NP/C exhibits a better performance with a sensitivity of 0.1726 mA (mmol/L) −1 , a wider linear range of 0.1–2.4 mM and a lower detection limit of 0.0014 mmol·L −1 , compared to the obtained CuO PS. This can be reasonably explained by the lower copper valence state and its interaction with the carbon supports in Cu NP/C. Furthermore, the good selectivity and anti-interference ability from the Cu NP/C are also acquired for electrochemical detection of hydrazine.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2016
·Vol. 27
·期 14
·145701
·
IF 3.573
Yong Zuo,Ji-Ming Song,He-Lin Niu,Chang-Jie Mao,Sheng-Yi Zhang,Yu-Hua Shen
P-nitrophenol (4-NP) and hydrazine hydrate are considered to be highly toxic pollutants in wastewater, and it is of great importance to remove them. Herein, TiO2-loaded Co0.85Se thin films with heterostructure were successfully synthesized by a hydrothermal route. The as-synthesized samples were characterized by x-ray diffraction, x-ray photoelectron spectroscopy, transmission electron microscopy and selective-area electron diffraction. The results demonstrate that TiO2 nanoparticles with a size of about 10 nm are easily loaded on the surface of graphene-like Co0.85Se nanofilms, and the NH3 · H2O plays an important role in the generation and crystallization of TiO2 nanoparticles. Brunauer–Emmett–Teller measurement shows that the obtained nanocomposites have a larger specific surface area (199.3 m2 g−1) than that of Co0.85Se nanofilms (55.17 m2 g−1) and TiO2 nanoparticles (19.49 m2 g−1). The catalytic tests indicate Co0.85Se–TiO2 nanofilms have the highest activity for 4-NP reduction and hydrazine hydrate decomposition within 10 min and 8 min, respectively, compared with the corresponding precursor Co0.85Se nanofilms and TiO2 nanoparticles. The enhanced catalytic performance can be attributed to the larger specific surface area and higher rate of interfacial charge transfer in the heterojunction than that of the single components. In addition, recycling tests show that the as-synthesized sample presents stable conversion efficiency for 4-NP reduction.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
DOI
高影响因子
PHYSICS LETTERS A
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2024
·
IF 2.3
Ting-ting Yan,Ran Jiang,Dong-yang Xi,Long Ma,Dan-dan Zhang,Yi-fei Xu
This study investigated the structural stability of 1-methylhydantoin (1-MH, C 4 H 6 N 2 O 2 ) Form-I at room temperature using Raman spectroscopy and a diamond anvil cell (DAC) for high-pressure experiments. Two phase transitions were identified at pressures of 0.6–1.7 GPa and 3.4–6.7 GPa. After complete release of pressure, the spectrum aligned with the Raman spectrum at ambient pressure, indicating reversibility of the phase transition. Analysis of Hirshfeld surface energy and fingerprints was conducted to assess changes in intermolecular interactions, revealing that the phase transitions are associated with rearrangements in the hydrogen-bonded network.
研究领域:
物理化学
·
材料科学
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2024
·
IF 5.7
Jian-Peng Hu,Qi Zhao,Qi Lin,Hong Yao,You-Ming Zhang,Tai-Bao Wei
Isoniazid ( INH ) is crucial in the treatment of tuberculosis; however, its overuse may induce significant gastrointestinal and hepatic side effects. On October 27, 2017, the International Agency for Research on Cancer, under the auspices of the World Health Organization, published a list of carcinogens for preliminary collation and reference. Isoniazid was categorized as a Group 3 carcinogen. The efficient detection of INH poses an important and challenging task. In this study, a “synergistic effect” is incorporated into the pillar (Yamagishi and Ogoshi, 2018) [5] arene-based macrocyclic host ( DPA ) by strategically attaching bis-p-hydroxybenzoic acid groups to the opposite ends of the pillar (Yamagishi and Ogoshi, 2018) [5] arene. This combination endows DPA with a reversible and selective fluorescence response to isoniazid. Additionally, DPA exhibits excellent analytical capabilities for isoniazid, including speed and selectivity, with a detection limit as low as 4.85 nM. Concurrently, DPA can self-assemble into a microsphere structure, which is convertible into micrometer-sized tubular structures through host-guest interactions with isoniazid. The introduction of a competitive guest, trimethylamine, enables the reversion to its microsphere structure. Consequently, this study presents an innovative and straightforward synthetic approach for smart materials that facilitates the reversible morphological transition between microspheres and microtubes in response to external chemical stimuli. This discovery provides a valuable strategy for designing “synergistic effects” in constructing trace-level isoniazid-responsive interfaces, with potential applications across various fields, such as controlled drug delivery.
研究领域:
分析化学
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材料科学
·
药物化学
✓ 已验证
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Yongfei Huang,Junping Liang,Zhefeng Fan
Hydrazine is widely used as a wide range of industrial chemical reagents. Because of its toxicity and explosiveness, it poses a serious threat to human health and ecological security. Therefore, it is of great significance to develop a real-time tracing method for hydrazine. Here, a novel turn-on fluorescent probe SXNU-1 for the detection of hydrazine was synthesized based on phenothiazine. SXNU-1 showed excellent selectivity toward hydrazine over various competitive species. Vinyl group with cyano and ethylacetate groups in SXNU-1 could react with hydrazine to form Schiff's base , showing bright green fluorescence. The response mechanism was verified by theoretical calculation, 1 H NMR titration and HRMS. In addition, SXNU-1 can determine hydrazine in soil, water samples and test strip. Because SXNU-1 has good cell membrane permeability, it can monitor different concentrations of hydrazine in HeLa cells. Therefore, we believe that SXNU-1 has great potential in the analysis and monitoring of environmental pollutants.
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yaling Li,Tianlie Luo,Minhui Yang,Guo Liu,Xian Chen,Yihua Li,Chengzhi Zhou,Willie J.G.M. Peijnenburg
The combustion of agricultural and forestry residues, along with subsequent runoff, can lead to the production of a significant quantities of dissolved black carbon (DBC), which plays a pivotal role in the photo-transformation of organic pesticides. As a result, the photochemical activity of DBC and its associated photo-transformation mechanisms must elucidate. This study investigated the effect of DBC on tetrachlorantraniliprole (TCTP) photo-transformation, a new type of pesticide independently developed and widely used in China, using photochemical simulation experiments. The results revealed that the prepared DBC had a smaller molecular weight and higher aromaticity, generating 3 DBC*, ·OH, and 1 O 2 , with apparent quantum yields of 4.75 × 10 −2 , 4.35 × 10 −5 , and 4.01 × 10 −2 , respectively. 3 DBC* was the dominant intermediate reactive responsible for accelerating TCTP photolysis by determining its direct photolysis rate constant as 0.278 min −1 . The degradation pathway of TCTP mainly involved nucleophilic substitution, dechlorination, and cleavage of the C–N bond. Notably, TCTP can photo-generate the cross-condensation products only in the presence of DBC. Ecotoxicity and organ-specific toxicity analysis demonstrated reduced environmental risks compared to TCTP for both direct photoproducts, as well as those mediated by DBC. These findings highlighted how DBC altered the photo-transformation pathway leading to decreased environmental risk-associated amide pesticides.
研究领域:
环境科学
·
农药化学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Manyi Yang,Fangzhi Mou,Kang Xiong,Luolin Li,Shuming Zhang,Fuyan Wang,Tianyu Gao,Zixuan Zhao,Jianguo Guan
Hydrazine (N 2 H 4 ) poses severe health risks even in trace amounts due to the highly carcinogenic and teratogenic degeneration while it is frequently used in industrial products. However, current techniques are difficult to perform in-situ detection of N 2 H 4 within confined sophisticated reactors or slim apparatus. Bioinspired by natural plant tumbleweed, we have demonstrated that swarming aggregation-induced emission microrobots (AIE-bots), which have a tumbleweed-like macroporous structure, are capable of performing motile-targeting detection of N 2 H 4 leakage or accumulation. In this protocol, the AIE-bots are assembled from emulsion droplets containing AIEgens and hydrophobic Fe 3 O 4 nanoparticles evenly distributed in CHCl 3 and n-hexane through phase separation during the evaporation of volatile solvents. Upon the application of a precessing B ( t ), the AIE-bots can wobble in swarms and adaptively navigate through narrow channels without adjusting B ( t ). Additionally, they can efficiently ascend steep slopes with angles up to 45° due to the lightweight and coarse surface. While moving, the swarming AIE-bots can in-situ perceive the N 2 H 4 concentration surrounding with an LOD of 3.81 ppb via fluorescence enhancement based on the Schiff base reaction. This work provides a microrobot detecting unknown toxin leakage or accumulation in hard-to-reach microenvironments, and will inspire the development of fluorescent micro-/nanorobots for intelligent motile sensing.
研究领域:
化学
·
材料科学
·
环境科学
✓ 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）