MICROCHEMICAL JOURNAL
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2022
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IF 5.304
Xin Wang,Xiaodan Zhang,Haiyan Cao,Yuming Huang
N-doped Ti 3 C 2 quantum dots (N-Ti 3 C 2 QDs) as the fluorescent nanoprobe were synthesized through inorganic base (i.e. KOH) stripping and solvothermal approach. The N-Ti 3 C 2 QDs displayed well-monodispersed near-spherical particles with average size of 2.3 nm, exhibited brightly blue emission and good stability, and possessed 14.46% of fluorescent quantum yield. Upon addition of Co 2+ or Ag + ions, the fluorescence (FL) of N-Ti 3 C 2 QDs could be quenched significantly. Mechanism investigation indicated that the inner filter and static extinguishing effects are responsible for the Co 2+ or Ag + ions induced FL quenching of the N-Ti 3 C 2 QDs. Based on above outcomes, we developed a simple N-Ti 3 C 2 QDs based fluorescent assay for the simultaneous determination of Co 2+ and Ag + ions, with a low detection limit of 0.21 and 0.10 μM, respectively. The assay was used to determine the content of Co 2+ and Ag + in real samples. This work will provide another way for the synthesis of fluorescent N-Ti 3 C 2 QDs and exploited their application in simultaneous detection of Co 2+ and Ag + .
研究领域:
材料科学
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分析化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 31
·期 1
·175-181
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IF 2.195
Xu Xiumei,Zhang Haijiao,Diao Quan,Zhu Yongsheng,Yang Gang,Ma Benyuan
Intracellular glutathione (GSH) sensing was important for monitoring many diseases and health of cell. In this study, we prepared surface-functionalized Ti 3 C 2 quantum dots (QDs) by ultrasonic cutting and hydrothermal method. Bright excitation wavelength-dependent blue emission was observed in Ti 3 C 2 QDs which was attributed to surface defects and quantum confinement effects. Furthermore, we developed a novel fluorescence sensor that can detect GSH with high sensitivity, based on the fluorescence resonance energy transfer process from Ti 3 C 2 quantum dots to GSH, with a detection limit of 0.02 μM approximately. This novel Ti 3 C 2 QD can be used as a promising fluorescent sensor for practical applications.
研究领域:
生物化学
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纳米医学
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分析化学
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DOI
高影响因子
Nanomaterials
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2022
·Vol. 12
·期 3
·542
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IF 5.719
Liqin Yang,Zhihong Chen,Xin Wang,Mingliang Jin
The practical application of photocatalytic H2-evolution is greatly limited by its sluggish charge separation, insufficient active sites, and stability of photocatalysts. Zero-dimensional (0D) Ti3C2MXene quantum dots (MQDs) and amorphous Ti(IV) have been proven to be potential substitutes for noble co-catalyst to accelerate the separation of photogenerated electron-hole pairs and prevent the self-oxidation of photocatalysts, leading to better photocatalytic H2-evolution performance with long-term stability. In this study, amorphous Ti(IV) and MQDs co-catalysts were successfully deposited on ZnIn2S4(ZIS) microspheres composed of ultra-thin nanosheets via a simple impregnation and self-assembly method (denoted as MQDs/ZIS/Ti(IV)). As expected, the optimal MQDs/ZIS/Ti(IV) sample exhibited a photocatalytic H2-evolution rate of 7.52 mmol·g−1·h−1and excellent photostability without metallic Pt as the co-catalyst in the presence of Na2S/Na2SO3as hole scavenger, about 16, 4.02 and 4.25 times higher than those of ZIS, ZIS/Ti(IV), and MQDs/ZIS, respectively. The significantly enhanced photocatalytic H2-evolution activity is attributed to the synergistic effect of the three-dimensional (3D) flower-like microsphere structure, the amorphous Ti(IV) hole co-catalyst, and a Schottky junction formed at the ZIS–MQDs interface, which offers more active sites, suppresses self-photocorrosion, and photo-generates the charge recombination of ZIS.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
Environmental Science-Nano
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2022
·Vol. 9
·期 7
·2417-2426
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IF 9.473
Zhenting Yuan,Wenrou Tian,Tingting Ren,Jun Han,Najun Li,Dongyun Chen,Jianmei Lu
Highly conductive Sn2+-anchored Ti3C2 quantum dots (Sn-TQDs) prepared by electrostatic attraction between Sn2+ and Ti3C2 quantum dots (TQDs) have a vital ability to transfer electrons. Herein, WO3/Sn-TQDs/In2S3 heterojunctions have been fabricated for the first time by introducing Sn-TQDs as electron mediators to shuttle electrons from WO3 to In2S3 efficiently, further realizing the rapid reduction of low-concentration Cr(VI) and H2 generation by water splitting under visible light. The Cr(VI) reduction efficiency and H2 evolution rate over WO3/Sn-TQDs/In2S3 were 2.1 and 5.5 times that of WO3/TQDs/In2S3, respectively. The enhanced photocatalytic activity of WO3/Sn-TQDs/In2S3 can be attributed to the positively charged Sn2+ anchored around the negatively charged TQDs, facilitating the improvement of photogenerated electron transfer efficiency. Finally, the possible photocatalytic mechanism of Cr(VI) reduction and H2 generation by WO3/Sn-TQDs/In2S3 was proposed. This provides a new perspective on the surface modification of Ti3C2 quantum dots in photocatalysis.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Ziyu Yao,Luyang Zuo,Huan Yang,Bin Qin,Xiaolong Li,Jinzeng Wang,Fang Wang
A ternary composite of Ti 3 C 2 quantum dots, hydroxypropyl methylcellulose, and Bi 2 WO 6 effectively harnesses both optical and mechanical energy to achieve a strong piezo-phototronic effect for the removal of tetracycline hydrochloride. Under external mechanical stress, this system maintains a tightly integrated heterostructure, dynamically facilitating charge transfer across the nanosheets. Notably, the catalytic activity of the Ti 3 C 2 quantum dots/hydroxypropyl methylcellulose/Bi 2 WO 6 composite has been significantly enhanced, exhibiting a kinetic rate constant of 0.146 min −1 , which is 9.7 and 7.3 times higher than that of Bi 2 WO 6 under pure photocatalytic and piezocatalytic conditions, respectively. The enhanced piezo-photocatalytic performance can be attributed to several synergistic factors: (i) Charge carriers move in the direction of external forces while holes move in the opposite direction, reducing the recombination efficiency of photoexcited electrons and holes; (ii) The good dispersibility and abundant hydroxyl groups of hydroxypropyl methylcellulose enable the even distribution of Ti 3 C 2 quantum dots. Moreover, they form strong hydrogen bonds between Ti 3 C 2 quantum dots and Bi 2 WO 6 , significantly promoting charge transfer and system stability; (iii) Ti 3 C 2 quantum dots serve as electrons accepter of photogenerated carriers on the surface of Bi 2 WO 6 nanoplates, accelerating the separation and migration of photoelectrons. This work demonstrates the successful construction of a stable organic–inorganic ternary catalytic system and elucidates its underlying mechanism, offering a promising strategy to boost the piezo-phototronic effect in advanced wastewater treatment applications.
研究领域:
环境科学
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材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2022
·Vol. 414
·期 23
·6753-6760
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IF 4.478
Zhang Huixin,Wang Lun,Zhuang Tingting,Wei Zhihao,Xia Jianfei,Wang Zonghua
Nanomaterial-derived quantum dots (QDs) are excellent electrochemiluminescence (ECL) luminophores and play an important role in optical sensing due to their excellent water solubility, good biocompatibility and tunable molecular size. In this work, a novel strategy was designed to form nano-hybrid Ti 3 C 2 QDs-AuNPs in situ as a luminophore based on the unique reducibility of Ti 3 C 2 QDs, which showed remarkable and stable ECL performance. Here, AuNPs were formed in situ without the addition of reducing agents and stabilizers, leading to threefold enhancement of the ECL signal of Ti 3 C 2 QDs due to their excellent charge transfer capability. Meanwhile, Ti 3 C 2 QDs-AuNPs with abundant Ti atoms also acted as recognition units. Through skillful combination with hybridization chain reaction (HCR) to expose more phosphate, an ECL platform was constructed to detect polynucleotide kinase (PNK) with good specificity and sensitivity. A lower limit of detection limit of 2.7×10 −5 U mL −1 was achieved, with a wide linear relationship ranging from 0.0001 to 10 U mL −1 . This novel strategy provides a guide for the application of nano-hybrid Ti 3 C 2 QDs-AuNPs as a luminophore in the field of ECL bioanalysis. Graphical abstract Novel in situ-formed nano-hybrid Ti 3 C 2 QDs-AuNPs were prepared as a luminophore, with threefold enhancement of the ECL signal of Ti 3 C 2 QDs.
研究领域:
材料科学
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分析化学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
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
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产品关联
DOI
高影响因子
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