Biosensors-Basel
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2022
·Vol. 12
·期 8
·626
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IF 5.743
Fengling Yue,Mengyue Liu,Mengyuan Bai,Mengjiao Hu,Falan Li,Yemin Guo,Igor Vrublevsky,Xia Sun
Herein, a novel electrochemical aptasensor using a broad-spectrum aptamer as a biorecognition element was constructed based on a screen-printed carbon electrode (SPCE) for simultaneous detection of aminoglycoside antibiotics (AAs). The ordered mesoporous carbon (OMC) was firstly modified on 2D Ti3C2MXene. The addition of OMC not only effectively improved the stability of the aptasensor, but also prevented the stacking of Ti3C2sheets, which formed a good current passage for signal amplification. The prepared[email protected]3C2MXene functioned as a nanocarrier to accommodate considerable aptamers. In the presence of AAs, the transport of electron charge on SPCE surface was influenced by the bio-chemical reactions of the aptamer and AAs, generating a significant decline in the differential pulse voltammetry (DPV) signals. The proposed aptasensor presented a wide linear range and the detection limit was 3.51 nM. Moreover, the aptasensor, with satisfactory stability, reproducibility and specificity, was successfully employed to detect the multi-residuals of AAs in milk. This work provided a novel strategy for monitoring AAs in milk.Keywords:broad-spectrum aptamer;aminoglycoside antibiotics;Ti3C2MXene;ordered mesoporous carbon;electrochemical aptasensor
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Keqing Zhou,Kaili Gong,Chenchao Wang,Mengqing Zhou,Jun Xiao
In this work, a bilayer nanocoating was constructed on the surface of flexible polyurethane (FPU) foam with Ti 3 C 2 MXene and polyethyleneimine-modified silica nanoparticles (mSiO 2 -NP@PEI) through layer-by-layer self-assembly technology, successfully obtaining modified flexible polyurethane composites (MFPU) with excellent flame retardancy, photothermal conversion and solar water desalination properties. The structure and morphology of MFPU foams were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Transmission electron microscope (TEM) and Scanning electron microscope (SEM). The MFPU with three coating cycles (MFPU3) had the best flame retardancy and smoke suppression performances, mainly in terms of decreased peak heat release rate (pHRR), peak smoke production rate (pSPR) and total smoke production (TSP) by 71.3 %, 62.1 % and 74.5 %, respectively, compared to those of neat FPU. In addition, MFPU foams exhibited extraordinary light-to-heat conversion and solar water desalination capabilities. MFPU3 could reach 120 °C in 138 s and its steam conversion efficiency η was as high as 89.6 %, which was 116.0 % higher than that of unmodified foam and had a 262.8 % increase over pure water. The flame retardant MFPU foams with excellent photothermal conversion efficiency will exhibit great application potential in solar water desalination and power generation.
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JOURNAL OF SOLID STATE CHEMISTRY
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2021
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IF 3.498
Xiang Qin,Rong Cao,Wensheng Gong,Liping Luo,Guojun Shi,Lijun Ji,Aiping Zhu
ZnCdS/TiO 2 /Na-MXene composites were prepared by a hydrothermal process to obtain an excellent photocatalyst with photo-corrosion resistant property. Under hydrothermal conditions, the surface of Ti 3 C 2 MXene was wrapped by Na + and ZnCdS nanoparticles , which slowed down the further oxidation of Ti 3 C 2 MXene into TiO 2 and improved the utilization rate of MXene. The adsorption capacity of an optimal ZnCdS/TiO 2 /Na-MXene composite to methylene blue reached 299.68 mg/g, confirming a higher MXene content was important for photocatalytic degradation of an organic dye. The basal distance of the MXene layers increased from 10.59 Å to 15.21 Å due to the intercalation of ZnCdS, which could facilitate the transportation and adsorption of organic pollutant in ZnCdS/TiO 2 /Na-MXene. The total removal efficiency was 9.3 times that of ZnCdS in 120 min. When the composites were used for photocatalytic hydrogen production , a relatively higher ZnCdS content was necessary. The hydrogen conversion efficiency of an optimal ZnCdS/TiO 2 /Na-MXene composite under visible light irradiation reached 8436.58 μmol·g −1 ·h −1 , which was 3.3 times that of ZnCdS. The ZnCdS/TiO 2 /Na-MXene composites showed excellent and stable photocatalytic activity in recycling experiments, confirming their excellent photo-corrosion property. These ZnCdS/TiO 2 /Na-MXene composites showed great potential in the application of photocatalytic degradation and hydrogen production, and provided a new way to reduce the oxidation process of Ti 3 C 2 MXene.
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CHEMOSPHERE
·
2021
·
IF 7.086
Chunxia Ma,Xiao Wang,Huamin Zhang,Wei Liu,Daijie Wang,Feng Liu,Heng Lu,Luqi Huang
Pesticides play critical roles in agricultural fields; however, pesticide residues can cause serious damage to human health and the ecological environment; therefore, developing a rapid and sensitive method for pesticide detection is urgently needed. Nanostructure-assisted matrix laser desorption/ionization (MALDI) mass spectrometry (MS) has great potential for the detection of low-mass pesticides. In this study, a novel Ti 3 C 2 MXene nanowire (TMN) was prepared by a facile sol-gel method and served as a matrix to enhance MALDI MS performance in the analysis of pesticides in positive ion mode. The TMN showed superior performance in the high-throughput detection of six kinds of pesticides (organophosphorus, organochlorine , carbamate, neonicotinoids, triazole, and oxadiazines), with ultrahigh sensitivity (detection limits at sub-ppt levels), remarkable repeatability, excellent salt tolerance, and extremely low background compared to traditional organic matrices due to the specific polyaromatic structure and the doping of nitrogen. Furthermore, this matrix was successfully employed for the analysis of residual pesticides in traditional Chinese herbs, and the level of diniconazole was quantified with a linear range of 0–50 ng/mL (R 2 > 0.99). More importantly, the spatial distribution of various endogenous compounds (e.g., amino acids and saccharides, fatty acids, alkaloids, and plant hormones) and xenobiotic pesticides from the intact root of the medicinal plant P. quinquefolium was clearly visualized using the TMN self-assembly film as a matrix for MALDI imaging mass spectrometry (IMS). With superior advantages such as sensitivity, simplicity, rapidness, and minimal sample requirement, TMN as a matrix-assisted MALDI MS shows great promise for various applications.
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CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Haoran Song,Daoyuan Zu,Changping Li,Rui Zhou,Yuwei Wang,Wei Zhang,Shiting Pan,Yang Cai,Zhuo Li,Yongming Shen,Jun Ma
Ultrafast activation of peroxymonosulfate (PMS) by reduction of trace Fe 3+ at the μg L -1 level with the ecofriendly Ti 3 C 2 MXene under neutral and alkaline conditions was achieved for the first time. Complete removal of model pollutant sulfamethoxazole (SMX) was accomplished within about 5 min and 10 min at pH 7.0 and 9.0, respectively. The degradation rate of SMX in Fe 3+ /PMS/MXene process was increased by 72 times compared with that in the absence of Ti 3 C 2 MXene (pH = 7). Methanol/ tert -butanol quenching experiment and electron spin resonance (ESR) measurement demonstrated that hydroxyl radical ( • OH) and sulfate radical (SO 4 •– ) were the primary reactive species. The strong reducibility of Ti 3 C 2 MXene played the key role in triggering the Fe(III)/Fe(II) cycle and accelerating PMS activation. The reducibility of Ti 3 C 2 MXene towards Fe 3+ was measured to be 3.35:1–5.03:1 (mol:mol), far higher than that of hydroxylamine (1:1). Because the confinement effect of MXene inhibited the hydrolysis of iron ions, Fe 3+ /PMS/MXene process exhibited excellent performance even under neutral and alkaline conditions. This study improved the understanding of MXene in Fenton-like reaction and provided an ideal Fenton-like process with ultra-low metal consumption, high efficiency and broad pH range.
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MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Tianyao Wang,Wenming Xiong,Xingguo Tian,Xiaoyan Xu
MXene quantum dots (MQDs) exhibit vast application prospection the field of fluorometric sensing, but how to efficiently utilize MQDs for the selective detection of two components still remains a challenge. Herein, an off–on fluorescence sensor based on ethylenediamine-functionalized Ti 3 C 2 MQDs (EDA-MQDs) was designed to selectively and sequentially detect Fe 3+ and histamine. EDA-MQDs were synthesized using a facile ultrasonic-hydrothermal method and exhibited bright blue fluorescence with a quantum yield up to 21.12 %. Inner filter effect occurred between Fe 3+ and EDA-MQDs, resulting in fluorescence quenching at 460 nm. Meanwhile, on account of the strong chelation between imidazole group on histamine and Fe 3+ , the Fe 3+ concentration in the system was reduced, so the fluorescence of EDA-MQDs was recovered. Thus, the as-designed fluorescence probe was used for dual-detection of Fe 3+ and histamine in real samples with satisfactory sensitivity and selectivity. The proposed sensing method was verified to possess good linear response in the range of 1–100 μM and 1–60 μM with detection limits of 0.11 μM and 46 nM for Fe 3+ and histamine, respectively. This work provided a highly effective tool for selective detecting histamine and Fe 3+ as well as tendered a novel strategy for functionalized Ti 3 C 2 MQDs in food analysis.
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JOURNAL OF HAZARDOUS MATERIALS
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2019
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IF 7.65
Dandan Song,Xinyu Jiang,Yanshan Li,Xiong Lu,Sunrui Luan,Yuanzhe Wang,Yan Li,Faming Gao
Transition metal oxides (TMOs) derived from metal − organic frameworks (MOF) combined with two-dimensional (2D) transition metal carbides possibly pave an innovative pathway for designing promising biosensors. Herein, a novel electrochemical sensing platform has been fabricated for ultra-sensitive determination of organophosphorus pesticides (OPs), based on MOF-derived MnO 2 /Mn 3 O 4 and Ti 3 C 2 MXene/Au NPs composites. Remarkably, the three-dimensional (3D) MnO 2 /Mn 3 O 4 hierarchical microcuboids derived from Mn-MOF are composed of vertically aligned, highly ordered nanosheets, and further combined with MXene/Au NPs yields synergistic signal amplification effect, with outstanding electrochemical performance, large specific surface area, and good environmental biocompatibility. Under the optimum conditions, the reported sensing platform AChE-Chit/MXene/Au NPs/MnO 2 /Mn 3 O 4 /GCE can be utilized to detect methamidophos in a broad concentration range (10 −12 –10 −6 M), together with a good linearity (R = 0.995). Besides that, the biosensor possesses a low limit of detection (1.34 × 10 −13 M), which far exceeds the maximum residue limits (MRLs) for methamidophos (0.01 mg/kg) established by European Union. Additionally, the feasibility of the proposed biosensor for detecting methamidophos in real samples has been demonstrated with excellent recoveries (95.2%–101.3%). Interestingly, the unique structures and remarkable properties of these composites make them attractive materials for various electrochemical sensors for monitoring either pesticide residuals or other environmentally deleterious chemicals.
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APPLIED THERMAL ENGINEERING
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2025
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IF 6.9
Hao Wang,Liu Yang,Xiaoke Li
Solar energy, recognized for its abundant and clean attributes, is a burgeoning renewable resource. Nanofluid photothermal conversion technology with volume absorption properties has been rapidly developed in recent years. This research optimized the performance of Ti 3 C 2 (MXene) nanofluid in solar photothermal conversion by integrating SiO 2 nanoparticles to form a composite nanofluid. The stability, thermal conductivity, and photothermal properties of the Ti 3 C 2 /SiO 2 nanofluids were comprehensively evaluated. The nanofluids demonstrated high stability, as evidenced by Zeta potentials all above 40 mV. Furthermore, the thermal conductivity of the nanofluids escalated with an increase in SiO 2 content. Specifically, the thermal conductivities of the composite nanofluids experienced an approximate 9 % enhancement when the temperature was elevated by 25 °C. The composite nanofluid had better light absorption because of SiO 2 nanoparticles’ forward scattering ability. The most efficient mixture (Ti 3 C 2 : 40 ppm and SiO 2 : 1000 ppm) reached a 67.35 % photothermal conversion efficiency, which is 5 % higher than the Ti 3 C 2 nanofluid alone at the same concentration. Rather than solely enhancing light absorption, this study provides a new pathway to improve the photothermal conversion efficiency of nanofluids by strengthening scattering. This contributes to enriching the theoretical and practical understanding of nanofluids in the field of photothermal conversion, offering scientific evidence and technical support.
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Advanced Optical Materials
·
2024
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IF 8
Po Jin,Enze Zhou,Liangliang Cheng,Wanlu Zheng,Yong Zhao,Shuang Zhai,Ya-nan Zhang
Riboflavin is a common marker of microbial corrosion and can act as an electron shuttle in the solvated state to enhance electron transfer efficiency. In this paper, an in-situ label-free fiber-optic biosensor modified by Ti 3 C 2 -MXene@Square Gold nanoparticles (SGNps) composites and riboflavin kinase is developed, which behaved with high sensitivity for measuring riboflavin. The sensing interface of the sensor is constructed by stepwise assembly of SGNps and riboflavin kinase using Ti 3 C 2 -MXene nanosheets as the supporting substrate. Riboflavin kinase catalyzed the phosphorylation of riboflavin to form flavin mononucleotides in the presence of adenine nucleoside triphosphate and Mg 2+ . Experimental results showed that the sensitivity of riboflavin measurement is 5.61 nm µ m −1 and the limit of detection (LOD) is 115 nmol L −1 (n m ) in the concentration range of 0–2.656 µ m . In situ label-free monitoring of riboflavin in Shewanella , the sensitivity of the sensor in bacterial fragmentation fluid is 53.90 nm/OD within the optical density (OD) of 0–0.175, and the LOD is OD = 0.017. The above results verified the feasibility of the sensor for in situ monitoring of riboflavin in microbial corrosive environments, with ultra-low detection limit and good selectivity, which undoubtedly provided great research value for the application of optical fiber sensors in microbial corrosion monitoring.
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MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 12
·1-9
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IF 5.479
Liu Mingwang,Zhou Ji,He Yu,Cai Zhaoxia,Ge Yili,Zhou Jiangang,Song Gongwu
Titanium carbide quantum dots functionalized with ε-poly-L-lysine (PLL) were synthesized by sonication cutting and hydrothermal synthesis. The deprotonated Ti 3 C 2 MXene quantum dots (Ti 3 C 2 MQDs) exhibit excitation wavelength-dependent blue photoluminescence with typical excitation/emission peaks at 330/415 nm and a quantum yield of 22% due to strong quantum confinement. The fluorescence of ε-poly-L-lysine protected Ti 3 C 2 MQDs (PLL-protected Ti 3 C 2 MQDs) is reduced via an inner filter effect after the addition of cytochrome c (cyt-c). Response to cyt-c is linear in the 0.2 to 40 μM concentration range and the detection limit is 20.5 nM. In the presence of trypsin, cyt-c is hydrolyzed to small peptides, and the Fe 3+ ion in cyt-c probably is reduced to Fe 2+ with the aid of the digestive enzyme. This results in the restoration of the blue fluorescence of the modified MQDs. Fluorescence increases linearly in the 0.5 to 80 μg mL −1 trypsin concentration range with the detection limit of 0.1 μg mL −1 . The method was successfully applied to the determination of cyt-c and trypsin in spiked serum samples.
Schematic of a method for the fluorometric “turn-off-on” determination of cytochrome c and trypsin based on ε-poly-L-lysine (PLL) protect MXene quantum dots (Ti 3 C 2 MQDs).
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Nanoscale
·
2018
·Vol. 10
·期 41
·19579-19585
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IF 7.233
Zheng Guo,Xiaohua Zhu,Shigong Wang,Chunyang Lei,Yan Huang,Zhou Nie,Shouzhuo Yao
As an emerging two-dimensional material, MXenes have attracted much attention due to their unique physicochemical properties, but their application in biosensing has been lagging far behind because of their poor salt tolerance. Herein, a titanium carbide MXene quantum dot (Ti3C2 QD)-based fluorescent probe for the alkaline phosphatase (ALP) activity assay and embryonic stem cell (ESC) identification was developed by taking advantage of the inner filter effect (IFE). Ti3C2 QDs with ∼4.2 nm in diameter were prepared from Ti3C2 MXenes by hydrothermal treatment, exhibiting excellent salt tolerance, anti-photobleaching and dispersion stability in aqueous solution. Owing to the remarkable overlap between the absorption spectrum of p-nitrophenol (p-NP) and the excitation and emission spectrum of Ti3C2 QDs, p-NP generated from ALP-catalyzed dephosphorylation of the substrate, p-nitrophenyl phosphate (p-NPP), can effectively quench the fluorescence of Ti3C2 QDs through the IFE. As a result, sensitive fluorometric analysis of ALP activity was achieved without complicating the conventional colorimetric ALP detection system. The proposed assay was successfully applied to determine ALP activity with a low limit of detection (0.02 U L−1) as well as monitoring the enzyme activity in real time. Finally, accurate analysis of ALP, the biomarker of ESC, in ESC lysates was also achieved using this IFE-based method, affording an alternative method for ESC identification.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Fei Long,Qixiang Zhang,Junjie Shi,Li Wen,Yonghui Wu,Ziqi Ren,Zunyu Liu,Yixin Hou,Ke Mao,Ke Niu,Nishuang Liu,Zhi Zhang,Luying Li,Jun Su,Fei Long,Yihua Gao
Aqueous zinc-ion batteries (AZIBs) are a green, low-cost and high-safety energy storage technology. Although MoS 2 is a promising electrode material, low conductivity and poor stability still limit their application in AZIBs. Constructing conductive heterostructures is an effective strategy to overcome these problems. Herein, metallic 1 T-MoS 2 nanosheets are innovatively combined with conductive Ti 3 C 2 MXene, resulting in enlarged 1 T-MoS 2 interlayers (from 9.5 to 9.9 Å) and enhanced hydrophilicity. This novel 1 T-MoS 2 /Ti 3 C 2 MXene heterostructure exhibits exceptional high-rate capability (284.3 mAh/g at 0.10 A/g with 105.2 mAh/g at 10.00 A/g) and long-term cycling stability (93.2 % capacity retention after 3000 cycles). High capacity comes from the expanded ion storage space caused by the extended layer spacing of the metallic 1 T-MoS 2 . Outstanding rate capability thanks to ultrafast electrons and ions transport from Ti 3 C 2 MXene. Prominent long-term cycling stability is attributed to the efficient synergistic effect of 1 T-MoS 2 and Ti 3 C 2 MXene in the 3D interconnected networks. As a proof of concept, the wearable quasi-solid-state Zn-ion battery employing the 1 T-MoS 2 /Ti 3 C 2 MXene cathode exhibits stable electrochemical performance under different bending conditions. This work explores a new route to design high-performance layered cathode materials for AZIBs.
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