CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Qiang Huang,Jiayu Yang,Fei Qi,Wenxia Zhang,Nan Zhang,Zhiyu Liang,Jiaxin Liu,Changqing Tian,Xiaosheng Tang,Daofu Wu,Benjun Huo
Photocatalytic conversion of CO 2 to value-added chemicals and fuels is a green and sustainable approach to solve the problems of CO 2 concentration increment and fossil fuels shortage. Employing photocatalysts with high catalytic activity and selectivity to realize CO 2 conversion has attracted extensive attention. However, the efficiency of photocatalysts is still unsatisfied and the selectivity of products is hard to be regulated, hindering their practical applications in large scale commercial purpose. In this work, for the first time, the Au and Pt was co-deposited on the heterostructure consisted of Cu 2 O quantum dots and ReS 2 nanosheets to achieve high efficiency and controllable selectivity during CO 2 photoreduction. The Au-Pt/Cu 2 O/ReS 2 photocatalysts show superior efficiency of CO 2 reduction than that of Au/Cu 2 O/ReS 2 , Pt/Cu 2 O/ReS 2 , Cu 2 O/ReS 2 , Cu 2 O. Such distinct improvement is attributed to the indirect Z-scheme mechanism and Schottky junction effect. Moreover, the synergetic effect of Au and Pt plays an important role of improving the photocatalytic activity, and the Au1-Pt5/Cu 2 O/ReS 2 exhibits the highest R electron of 516.86 μmol/g during one hour of visible light illumination, which is much larger than many recently reported photocatalysts under comparable condition. Meanwhile, the selectivity of CO and CH 4 is effortlessly tunable from 0 to 100% by modulating Au/Pt metal mass ratio due to the strong CO adsorption on Pt metals and the intensive interaction between Au and Pt atoms at the Au/Pt interface. This controllable selectivity provides admirable strategy to tune the component proportion of the gas products for the subsequent conversion into high value-added chemicals or liquid fuels. Our study proposes novel and deep insights into the design and fabrication of practical photocatalysts with high catalytic activity and controllable selectivity to perform efficient CO 2 photoconversion.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2023
·
IF 6.1
Jie Liu,Zixuan Zhang,Jie Dong,Anyi Chen,Jingfu Qiu,Chaorui Li
As a reliable biomarker to evaluate the severity of sepsis, sensitive and accurate detection of procalcitonin (PCT) is essential. In this study, a dual-mode electrochemical immunosensor based on Au/ZIF-8 as substrate and Pt@Cu 2 O as signal label was constructed for the detection of PCT. By loading Au nanoparticles onto rhombic dodecahedral ZIF-8, the substrate (Au/ZIF-8) has large specific surface area and can immobilize antibody (Ab 1 ) by Au–N bonds. Meanwhile, hollow Pt@Cu 2 O nanocomposite with excellent peroxidase-like activity and electrocatalytic activity were synthesized as signal label. In the process of electrochemical testing, Pt@Cu 2 O catalyzed the reduction of hydrogen peroxide (H 2 O 2 ) and further promotes the oxidation of hydroquinone (HQ) to achieve the synergistic amplification of electrochemical signals. The proposed immunosensor detected PCT by amperometric i-t and differential pulse voltammetry (DPV) tests with a good linear response and low limit of detection (i-t: 0.70 fg/mL and DPV: 0.40 fg/mL) in the range of 10 fg/mL∼100 ng/mL. The immunosensor exhibited excellent sensitivity and accuracy, indicating the potential application of this method for PCT detection.
研究领域:
生物医学工程
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分析化学
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免疫学
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 37
·16475-16480
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IF 2.7
Xiaoxu Zhang,Xiangyu Cai,Yanqun Fei,Yuying Jia,Hongyan Shan,Yanfu Huan
In this article, a CRET-based chemiluminescent sensor was developed for ascorbic acid detection. Au/Pt@Cu2O/CuO NPs with peroxidase activity were prepared to catalyse the decomposition of H2O2 to produce free radicals, which led to the enhancement of the chemiluminescence (CL) signal, and the CRET between luminol and MnO2 NSs was able to take place and the CL signal was reduced; the presence of ascorbic acid would reduce MnO2 NSs, which was able to weaken the energy transfer between luminol and MnO2 NSs and restored the CL signal. Under the optimal experimental conditions, the detection range of ascorbic acid was 1–1000 μM, and the LOD was 0.35 μM. The method is sensitive and has a wide linear range, and is expected to be applied to the detection of ascorbic acid in more complex environments.
研究领域:
分析化学
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生物传感
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
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IF 9.6
Li-Yong Liu,Yun-Qi Dou,Maarten Bransen,Alfons van Blaaderen,Tian-Song Deng,Xiaoyu Zhao,Dechao Yu
Combining noble metal nanoparticles with electron acceptors, such as semiconductors or non-plasmonic metals, significantly enhances photocatalytic performance. However, optimizing multi-material combinations for superior catalytic efficiency remains challenging. In this study, we present a method for synthesizing composite structures by reducing Cu 2+ ions with hydrazine hydrate, forming gold nanorods (AuNRs) decorated with dendritic Cu 2 O shells. The influence of CTAB on Cu 2 O deposition sites was investigated, and ternary composite nanoparticles were further synthesized by incorporating Pd or Pt into the AuNR-Cu 2 O system (AuNR@Pd(Pt)-Cu 2 O). The photocatalytic performance of these nanostructures was evaluated by catalyzing methyl orange (MO) under light irradiation. Results showed that AuNR@Pt-Cu 2 O nanoparticles exhibited catalytic performance 35.7 times higher than that of pure Cu 2 O nanoparticles. This enhancement is attributed to efficient charge transfer and photothermal effects facilitated by the ternary structure. These findings provide valuable insights into plasmonic heterostructure design and open new avenues for developing high-performance photocatalysts for energy and environmental applications.
✓ 已验证
DOI
PubMed
高影响因子
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