ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Wenli Gao,Haohan Song,Xiao Wang,Xiaoqiang Liu,Xiaobin Pang,Yanmei Zhou,Bin Gao,Xiaojun Peng
Red emissive carbon dots (CDs) have drawn more and more attention due to their good organ penetration depth and slight biological tissue photodamage. Herein, the fluorescent CDs with red emission were synthesized by the facile one-pot hydrothermal treatment of citric acid and neutral red and they show red fluorescence both in aqueous solution and solid state. The solution of CDs exhibits the quantum yield of 12.1%, good stability against photobleaching, and low cytotoxicity. As-prepared CDs can be used as a fluorescent probe for peculiar detection of Pt2+, Au3+, and Pd2+. Furthermore, the CDs show excellent biocompatibility, which were successfully used as hopeful bioimaging and biosensing of noble metal ions in PC12 cells and zebrafish.
研究领域:
分析化学
·
生物医学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Lixin Zhang,Zhengxuan Zhu,Wei Tan,Jiawei Ji,Yandi Cai,Qing Tong,Yan Xiong,Haiqin Wan,Lin Dong
Strong metal–support interactions (SMSIs) have a significant effect on the performance of supported noble-metal catalysts for volatile organic compound (VOC) elimination. Herein, the strength of the SMSI of Pt/OMS-2 between Pt and the OMS-2 support is regulated by simply changing calcination temperatures, and the catalyst calcined at 300 °C (Pt/OMS-2-300) performs the best in the catalytic combustion of toluene. Through systematic structural characterizations, it is revealed that much more Pt2+–Ov–Mnδ+ species are formed in Pt/OMS-2-300, which can help facilitate the generation of more reactive oxygen species and promote lattice oxygen mobility. Moreover, the results of in situ DRIFTS experiments further confirm that abundant Pt2+–Ov–Mnδ+ species at the Pt–MnO2 interface on Pt/OMS-2-300 can better enhance the adsorption and activation of toluene, thus boosting the catalytic performance in toluene combustion. This newly developed strategy of thermal-driven regulation of the SMSI provides a novel perspective for constructing highly efficient catalysts for VOC emission control.
研究领域:
催化化学
·
环境科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Xue Li,Yan-Rong Liu,Wen-Min Liao,Ai-Ping Jia,Yue-Juan Wang,Ji-Qing Lu,Meng-Fei Luo
Catalytic propane combustion was performed on a series of supported Pt/AlF 3 catalysts. These catalysts are very active and stable in the reaction, and the 0.2Pt/AlF 3 catalyst gives the highest specific reaction rate of 207.3 μmol g Pt −1 s −1 at 220 °C. The 1Pt/AlF 3 is much more active than the reference Pt/Al 2 O 3 catalyst, due to its higher content of metallic Pt species than that in the Pt/Al 2 O 3 . Furthermore, turnover frequency (TOF) based on Pt dispersion increases with the surface concentration of metallic Pt 0 in the catalyst, suggesting these species might be the active sites. Furthermore, synergistic roles of metallic and oxidized Pt species are found, as the TOFs calculated based on surface Pt 0 concentration reaches a maximum at the Pt 0 /Pt 2+ molar ratio of about 1. Such optimal Pt 0 /Pt 2+ ratio implies the requirement of Pt 0 Pt 2+ pair in the reaction, probably due to the activation and cleavage of C H bond on metallic Pt atom and the sequential oxidation on the oxidized Pt atoms.
研究领域:
催化化学
·
环境化学
·
材料化学
·
表面科学
·
能源化学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2020
·Vol. 11
·期 1
·1-7
·
IF 12.121
Yu Fei-Yang,Lang Zhong-Ling,Yin Li-Ying,Feng Kun,Xia Yu-Jian,Tan Hua-Qiao,Zhu Hao-Tian,Zhong Jun,Kang Zhen-Hui,Li Yang-Guang
The oxidized platinum (Pt) can exhibit better electrocatalytic activity than metallic Pt 0 in the hydrogen evolution reaction (HER), which has aroused great interest in exploring the role of oxygen in Pt-based catalysts. Herein, we select two structurally well-defined polyoxometalates Na 5 [H 3 Pt (IV) W 6 O 24 ] (PtW 6 O 24 ) and Na 3 K 5 [Pt (II) 2 (W 5 O 18 ) 2 ] (Pt 2 (W 5 O 18 ) 2 ) as the platinum oxide model to investigate the HER performance. Electrocatalytic experiments show the mass activities of PtW 6 O 24 /C and Pt 2 (W 5 O 18 ) 2 /C are 20.175 A mg −1 and 10.976 A mg −1 at 77 mV, respectively, which are better than that of commercial 20% Pt/C (0.398 A mg −1 ). The in situ synchrotron radiation experiments and DFT calculations suggest that the elongated Pt-O bond acts as the active site during the HER process, which can accelerate the coupling of proton and electron and the rapid release of H 2 . This work complements the knowledge boundary of Pt-based electrocatalytic HER, and suggests another way to update the state-of-the-art electrocatalyst.
研究领域:
电化学
·
催化
·
材料科学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Mingyue Chang,Moru Zhang,Haihong Hu,Shucai Liang
A novel polyethyleneimine (PEI)-based polymeric nanosensor (named PEIMP) was developed for specific fluorescence enhanced sensing of Pt 4+ ion in aqueous media. The sensor was fabricated via “one-pot” three-component reaction using ortho -phthalaldehyde (OPA), PEI and mercaptopurine as raw materials, by which the formation of isoindole fluorophore and its chemical grafting onto PEI chain were achieved simultaneously. The morphology, size and structure of PEIMP have been characterized by various techniques. In buffered aqueous solution (pH 7.0), PEIMP had the ability to specifically bind with Pt 4+ producing notable increase in fluorescence emission at 463 nm (excited at 395 nm). Based on investigations on the sensing mechanism, the fluorescence turn-on response towards Pt 4+ was attributed to the binding of Pt 4+ with purine group in PEIMP resulting in the inhibition of photoinduced electron transfer from purine to isoindole fluorophore. Under the optimal conditions (pH 7.0, incubated at 37 ℃ for 20 min) the detection of Pt 4+ could be achieved with the linear range of 0.1–10 μM and the detection limit of 80 nM. The sensor had the advantages of low-cost raw materials, simple and environmental-friendly synthesis and analytical detection procedures. What's more, it could selectively and sensitively detect Pt 4+ without the effects from common transition metal ions (Pb 2+ , Fe 3+ , Cr 3+ , Al 3+ , Ag + , Co 2+ , Hg 2+ , Cd 2+ , Cu 2+ , Mg 2+ , Ni 2+ , Mn 2+ , Zn 2+ ), especially precious metal ions of Pt 2+ and Pd 2+ . The proposed method had been successfully applied to quantify Pt 4+ in wastewater and urine samples, and also proved to be potential for monitoring Pt 4+ in biological systems.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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