ANALYTICA CHIMICA ACTA
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2023
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IF 6.2
Yulin Zheng,Xiaoting Cui,Huanshun Yin,Haowei Zhang,Lulu Cao,Lanlan Gao,Yunlei Zhou,Peng Ju,Shiyun Ai
As an important epigenetic modification , 5-carboxycytosine (5caC) played an important role in gene regulation, cell differentiation and growth. 5caC existed in many cells and tissues, but it was highly similar to the structure of other cytosine derivatives and had less content in the genome. Therefore, it was urgent to develop a sensitive and highly selective trace biosensor to detect 5caC. A novel photoelectrochemical biosensor was fabricated for 5-carboxy-2′-deoxycytidine-5′-triphosphate (5cadCTP) detection, where SnS 2 @Ti 3 C 2 nanocomposite was employed as photoactive material, polyethyleneimine was used as 5cadCTP recognition and capture reagent, and Ru(NH 3 ) 6 3+ was used as photosensitizer for signal amplification. Due the good conductivity of Ti 3 C 2 MXene and the matched energy band between Ti 3 C 2 MXene and SnS 2 , SnS 2 @Ti 3 C 2 nanocomposite presented strong photoactivity, which was beneficial to the high detection sensitivity. For specific recognition of 5cadCTP, the covalent interaction of –NH 2 in 5cadCTP with –COOH on the substrate electrode was used, which was beneficial to the high detection selectivity . A broad linear relationship between photocurrent and 5cadCTP concentration was observed ranging from 1 pM to 0.2 μM. The low detection limit of 260 fM was achieved. The developed method has high detection specificity and can even distinguish 5caC with its derivatives. In addition, the applicability was evaluated by detecting the content change of 5caC in the genomic DNA of rice seedlings after cultured with environmental pollutants . This work provides a novel platform for 5cadCTP detection, and it can also be applied to detect other cytosine derivatives with suitable recognition strategies.
研究领域:
生物化学
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分子生物学
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分析化学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Wenlei Zhang,Weiheng Wang,Yunfan Wang,Lei Sun,Yongjiao Sun,Jie Hu
The continuous discharging of nitrogen dioxide (NO 2 ) significantly damaged global environment and human health. In this study, SnS 2 microflowers/Ti 3 C 2 MXene heterostructure was modified by Au nanoparticles (AuNPs) for the detection of NO 2 at room temperature. The microcomposite decorated with 6 wt% AuNPs exhibited excellent sensing properties including response value of 5.34 to 1 ppm NO 2 , which was almost 5 times higher than that of undecorated one. The limit of detection lowered from 500 ppb to 5 ppb with the addition of AuNPs. Besides, the AuNPs decorated SnS 2 /MXene microcomposite revealed good selectivity, fatigue resistance, as well as potential application towards flexible sensing. The NO 2 gas sensing mechanism of AuNPs decorated with SnS 2 /Ti 3 C 2 MXene microcomposite was discussed through density functional theory calculation on adsorption behavior and transferred charges in detail. This work may provide an important pathway for the future development of NO 2 sensors at room temperature.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
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2025
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IF 3.4
Qi Shi,Siqi Huang,Qi Xi,Yanan Niu,Nuan Wen,Libo Du,Yuguang Lv,Tai Peng
In this study, Ti 3 C 2 quantum dots (QDs) were prepared via a simple hydrothermal method and loaded onto binary catalytic materials to construct ternary PTCN/SnS 2 /Ti 3 C 2 QDs composites for enhancing photocatalytic performance. The materials were characterized using techniques such as XRD, TEM, FT-IR, UV–vis, BET, XPS, and PL. The results showed that Ti 3 C 2 QDs were uniformly dispersed on the surface of PTCN/SnS 2 , forming a stable heterostructure. The specific surface area increased to 68.847 m 2 /g (5.6 times higher than that of PTCN), the visible light absorption edge redshifted to 532 nm, and the band gap narrowed to 2.1 eV. Under visible light, the composite exhibited degradation rates of 90.53 %, 79.53 %, 81.23 %, and 85.62 % for norfloxacin, pefloxacin, enrofloxacin, and ciprofloxacin, respectively. At the optimal doping amount (k = 0.0408 min −1 ), the catalytic activity was 6.21 times that of pure PTCN and 2.87 times that of PTCN/SnS 2 . Cyclic experiments demonstrated excellent stability of the composite, with a degradation rate remaining at 86 % after 5 cycles. This study is the first to construct the PTCN/SnS 2 /Ti 3 C 2 QDs ternary system and propose a Z-scheme charge transfer mechanism, providing new insights for the design of high-efficiency photocatalytic materials.
研究领域:
材料科学
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环境科学
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纳米技术
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催化
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
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IF 3.8
Li Zhang,Qing Shu,Qiong Wu,Xuyao Xing
In this study, SnS 2 /Ti 3 C 2 was synthesized by combining SnS 2 (synthesized via oil bath method) with Ti 3 C 2 (prepared from etching of Al layers from Ti 3 AlC 2 MAX phase). The morphology, structure and photochemical properties of the catalyst were analyzed by various characterization methods. The photocatalytic performance of sample was studied by the degradation of Rhodamine B (RhB) under xenon lamp irradiation. Results showed that SnS 2 /Ti 3 C 2 could achieve 99 % photocatalytic degradation of RhB within 60 min, which was much higher than the 38 % photocatalytic degradation of SnS 2 . In addition, the RhB degradation rate of SnS 2 /Ti 3 C 2 still reached 93 % after 5 cycles. The excellent photocatalytic activity and durability were mainly attributed to the formation of Schottky heterojunction between SnS 2 and Ti 3 C 2 , which was very advantageous for efficiently separating and transferring charge carriers. The work functions of SnS 2 and Ti 3 C 2 Tx were calculated through the DFT calculations, which were 5.22 eV and 5.69 eV respectively. According to barder charge analysis, the charge transfer between SnS 2 and Ti 3 C 2 was 0.04 e. Meanwhile, radical trapping experiments confirmed that h + and •O 2− were the main active species in the reaction system. As a visible light-responsive catalyst, SnS 2 /Ti 3 C 2 could be effectively applied to the degradation of organic dye pollutants, and which has broad application prospects.
研究领域:
材料科学
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环境科学
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光催化技术
✓ 已验证
DOI
高影响因子
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