CHEMICAL ENGINEERING JOURNAL
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2022
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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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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 14
·5355
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IF 4.6
Keyan Chen,Shiqi Fu,Chenyu Jin,Fan Guo,Yu He,Qi Ren,Xuesheng Wang
Smartphone-assisted fluorescence and colorimetric methods for the on-site detection of Hg2+and Cl−were established based on the oxidase-like activity of the Au–Hg alloy on the surface of Au/Cu/Ti3C2NSs. The Au nanoparticles (NPs) were constructed via in-situ growth on the surface of Cu/Ti3C2NSs and characterized by different characterization techniques. After the addition of Hg2+, the formation of Hg–Au alloys could promote the oxidization of o-phenylenediamine (OPD) to generate a new fluorescence emission peak of 2,3-diaminopenazine (ADP) at 570 nm. Therefore, a turn-on fluorescence method for the detection of Hg2+was established. As the addition of Cl−can influence the fluorescence of ADP, the fluorescence intensity was constantly quenched to achieve the continuous quantitative detection of Cl−. Therefore, a turn-off fluorescence method for the detection of Cl−was established. This method had good linear ranges for the detection of Hg2+and Cl−in 8.0–200.0 nM and 5.0–350.0 µM, with a detection limit of 0.8 nM and 27 nM, respectively. Depending on the color change with the detection of Hg2+and Cl−, a convenient on-site colorimetric method for an analysis of Hg2+and Cl−was achieved by using digital images combined with smartphones (color recognizers). The digital picture sensor could analyze RGB values in concentrations of Hg2+or Cl−via a smartphone app. In summary, the proposed Au/Cu/Ti3C2NSs-based method provided a novel and more comprehensive application for environmental monitoring.Keywords:Au/Cu/Ti3C2NS;Au–Hg alloy;oxidase-like activity;smartphone;colorimetric detection
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Materials Today Chemistry
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2022
·
IF 7.613
W. Zhan,L. Ma,M. Gan
Herein, we report an efficient bottom-up approach to construct the carbon encapsulated CoP nanoarray-like architectures onto the nitrogen-doped Ti 3 C 2 MXene Pt-based catalyst (Pt–CoP@CNT NA/N–Ti 3 C 2 ) by employing metal-organic frameworks (MOFs) as the sacrificial template. Benefiting from the catalytic effect for metals into MOFs and synergistic effect of Ti 3 C 2 substrate, homogenous nanotubes nanoarray-like structure is obtained on Ti 3 C 2 nanosheet . The unique heteroatom-doped 3D connected structure endows the catalyst with distinct structural merits, such as the carbon and nitrogen-enriched structures, large specific surface areas and excellent conductivity, leading to the high dispersion of ultrafine metallic Pt and efficient electronic/mass transfer, contributing to more exposed active sites of Pt surface. The fabricated CoP and doped nitrogen especially for those lattice nitrogen derived from the pristine MOFs can present exceptional co-catalytic effect, resulting in obtaining strong anti-CO poisoning capacity for catalyst. Therefore, the ultrahigh catalytic activity of per Pt active site for methanol oxidation reaction can be preserved. Besides, owing to the strong stability of carrier, the catalyst delivers a reliable long-term stability during the test. This work gives new ideal for the design of novel cost-effective 3D Ti 3 C 2 -based nanomaterial catalyst with excellent catalytic activity for methanol oxidation.
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ANALYTICA CHIMICA ACTA
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2022
·
IF 6.911
Da Chen,Shuaibin Shao,Wei Zhang,Jingbo Zhao,Meiling Lian
The development of functional nanomaterials based on the unique structure and morphology of MXene for biosensing has aroused great interest. In this work, using thiourea as the doping source, a new structure composed of nitrogen and sulfur co-doped on the surface of Ti 3 C 2 nanosheets was synthesized through a simple one-step synthesis method. Fortunately, the obtained nitrogen and sulfur co-doped Ti 3 C 2 nanosheets (NS–Ti 3 C 2 NSs) showed excellent peroxidase-like activity and electrochemical activity. The catalytic mechanism of modified Ti 3 C 2 nanosheets was explored. It is revealed that the catalytic mechanism of NS-Ti 3 C 2 NSs is composed of two important parts: the dissociation and adsorption of H 2 O 2 and the protonation of TMB. In addition, the fabricated NS-Ti 3 C 2 NSs-based electrochemical biosensor is superior to the counterpart from Ti 3 C 2 nanosheets, indicating that the doping of nitrogen and sulfur elements provides more active sites and promotes electron transport efficiency. Combining the unique advantages of colorimetry and electrochemical technology , we have developed a fast, accurate, intuitive and efficient UA detection method for uric acid in the range of 2 μM–400 μM with a detection limit (LOD) of 0.19 μM. The established sensing platform in this study prove the possibility of the doping method for the development of MXene-based biosensors with high sensitivity and high performance, and pave the way for the future development of biosensors for biomedical fields.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
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IF 4.831
Chaojun Fu,Fanrong Ai,Jianzhen Huang,Zhiying Shi,Xiluan Yan,Xiangjuan Zheng
Antibiotic residues have become a public health issues, the fast detection of tetracycline (Tc) in the environment is urgently required. In this work, Ti 3 C 2 quantum dots (Ti 3 C 2 QDs) and Europium ions jointly constructed a ratiometric fluorescence (FL) platform for the detection of Tc, based on synergistic impact of the Foster Resonance Energy Transfer ( FRET) from Ti 3 C 2 QDs to Eu 3+ ions and the Antenna Effect (AE) between Tc and Eu 3+ ions. And we proposed a ratiometric FL platform for detecting Tc with good linear response range (100–1000 uM) and low detection limit (48.79 nM). Meanwhile, we applied this platform to detect a serious of β-diketone ligands of Eu 3+ ions, demonstrating the platform's versatility for this category of chemical. Furthermore, based on the color changes of [email protected] 3+ from blue to red at 365 nm ultraviolet light, an intelligent detection smart device was built for the visual semi-quantitative detection of Tc in actual samples. We proved the applicability of the device in complicated samples and the potential for rapid, sensitive, intuitive and point-of-care detection in the field of environment, food, pharmaceutical and agriculture.
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Journal of Environmental Chemical Engineering
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2023
·
IF 7.7
Wenqiang Liu,Meng Zhou,Heqing Fu
A ternary Ag@ZnO@Ti 3 C 2 MXene heterojunction (AZM) is synthesized by hybridizing ZnO and Ag nanoparticles with the MXene via a simple hydrothermal and chemical deposition method. The addition of ZnO and Ag can effectively compensate for MXene’s narrow bandgap property, promote charge carrier separation, and improve visible light absorption , thereby enhancing photocatalytic activity. The photocatalytic activity of the AZM is evaluated through the removal efficiency of methylene blue (MB) dye and levofloxacin (LVX) under visible light irradiation. The results show that the optimized ternary AZM heterojunction photocatalysts (AZM-15) possesses the maximum degradation of MB (90.54%) with a reaction rate constant of 0.0473 min −1 , while the maximum degradation of LVX (86.76%) has a reaction rate constant of 0.0408 min −1 . Moreover, the AZM composite exhibits excellent stability, which explains its MB removal rate of 83.59% and LVX removal rate of 80.03% after five cycles. The results of trapping experiments and EPR demonstrated that the main active species in the MB and LVX photodegradation process are·OH and·O 2 - . This work not only elucidates a possible mechanism of photocatalytic degradation of organic pollutants but also provides a pathway to design new bandgap photocatalysts for mitigating environmental pollution .
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ACS Biomaterials Science & Engineering
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2021
·
IF 4.749
Wei Xu,Marwan Sakran,Jianwen Fei,Xiaoyun Li,Chenyuan Weng,Wei Yang,Guomin Zhu,Wanying Zhu,Xuemin Zhou
Hydrogen peroxide (H2O2) has been reported to mediate a variety of physiological and pathological processes in living systems. In this work, a biosensor for determination of H2O2 was prepared by using an HRP/Ti3C2/Nafion film-modified glassy carbon electrode (GCE). Ti3C2 nanosheets with remarkable conductivity and high specific surface area were chosen as carriers for HRP. Moreover, this biosensor modified with HRP has a specific catalytic effect on H2O2. The difference in peak current could reflect the quantitative change of H2O2. The linear range of the biosensor is 5–8000 μM, and the detection limit is 1 μM (S/N = 3). This biosensor was used to detect H2O2 in clinical serum samples of normal controls and patients with acute myocardial infarction (AMI) before and after percutaneous coronary intervention (PCI). The results showed that the difference between normal controls and patients is significant (P < 0.05), as well as the difference for patients before and after PCI (P < 0.01), but no significant difference existed between postoperative patients and normal controls. This biosensor has the advantages of simple preparation, high sensitivity, and quick detection, showing potential application in clinical diagnosis.
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ACS Applied Nano Materials
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2021
·
IF 5.097
Yuhui Miao,Kuo Yang,Shenfei Zong,Zhuyuan Wang,Yiping Cui
Applying nanomaterials to highly sensitive, fast, and accurate detection of hazardous chemicals in water remains to be a great challenge. Herein, a Ti3C2-functionalized superlattice SERS substrate was developed, which can identify multiplex fish drug residues in pond water with a high sensitivity and reliable reproducibility. Specifically, a superlattice substrate was fabricated by vertically self-assembled bimetallic nanocuboids (BNCs) through the Marangoni effect, which exhibited an excellent SERS activity. Furthermore, the modification of the Ti3C2 layer endows the substrate with both an increased SERS signal and an enhanced adsorption for multiple fish drugs, including crystal violet (CV), malachite green (MG), and methylene blue (MB). The limit of detection (LOD) was as low as 10–12 M, while the signal fluctuation was as small as ∼5.9% between batches. More importantly, a trace amount of multiplex fish drug residues was detected in natural pond water, demonstrating a convincing practicality of such a Ti3C2-functionalized superlattice SERS substrate.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
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IF 3.807
Xiao Yang,Minghui Feng,Jianfei Xia,Feifei Zhang,Zonghua Wang
A novel electrochemical biosensor based on AuNPs/Ti 3 C 2 MXene three-dimensional nanocomposite for sensitive miRNA-155 detection by exonuclease III (Exo III)-aided cascade target recycling is reported. Ti 3 C 2 MXene is synthesized and used as a support to immobilize Au nanoparticles (AuNPs) due to its special layered structure and metallic properties. The three-dimensional (3D) structure of the AuNPs/Ti 3 C 2 MXene nanocomposite for the biosensor platform leverages the integrated advantages of a large specific surface area, excellent electrical conductivity and electrocatalytic properties . AuNPs are used to immobilize capture DNA (C-DNA) by Au S chemical bonds. The C-DNA was modified with methylene blue (MB) at the 3′ end, resulting in an initial DPV electrochemical signal ( I d ). In the presence of target, miRNA-155 and C-DNA formed a double-stranded structure by complementary base pairing. Subsequently, Exo III digested the 3′ end of the C-DNA in the double-stranded structure and caused the electrochemical signal to “turn off” (the final signal denoted as I h ). By Exo III-aided cascade cleavage of the target, one miRNA-155 chain causes the release of several C-DNAs under certain conditions, which significantly amplifies the peak current difference on the fabricated biosensor (Δ I = I d ﹣ I h ). The electrochemical sensor achieved a detection limit of 0.35 fM (S/N = 3) with a linear range from 1.0 fM to 10 nM. This sensor also shows desirable stability, reproducibility and specificity.
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APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Hongjun Fang,Yusong Pan,Haixian Yan,Xiulong Qin,Chao Wang,Linfeng Xu,Chengling Pan
A novel Yb 3+ /Tm 3+ co-doped Ti 3 C 2 /Ag/Ag 3 VO 4 composite with stable and robust photodegradation performance was synthesized by in-situ partially reduction along with hydrothermal strategy. In the composite, block-like Ag 3 VO 4 particles are self-assembled on the surface of 2D Ti 3 C 2 MXene accompanied by partial reduction of Ag + to Ag 0 . Photodegradation results showed that the resulting Yb 3+ /Tm 3+ co-doped Ti 3 C 2 /Ag/Ag 3 VO 4 composite with optimal Yb/Tm proportion (Y/T:0.3/0.005) presented a boosting photocatalytic performance for degradation of tetracycline (TC) and organic dyes under visible light irradiation. The removal efficiency was 97% for TC in 20 min, 96% for rhodamine B in 25 min, and 99% for methylene blue in 20 min, which was higher than that of Ag/Ag 3 VO 4 composite. As manifested by photoelectrochemical measurements, the enhanced photocatalytic performance of the Y/T:0.3/0.005 composite was attributed to the improved light absorption and excellent charge separation induced by the formation of intermediate energy states after co-doping Yb 3+ /Tm 3+ ions. Meanwhile, the photocatalytic mechanism of the photocatalyst was also investigated through electron spin resonance (ESR) spectra and trapping experiments, which verified that the active species of h + and ·O 2 − play the important role for photodegradation of tetracyline and organic dyes.
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MATERIALS RESEARCH BULLETIN
·
2019
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IF 3.355
Hongjun Fang,Yusong Pan,Minyuan Yin,Chengling Pan
It is an effective method to explore full spectrum responsive photocatalyst for improving their photocatalytic activity. Herein, Ti 3 C 2 −OH/Bi 2 WO 6 :Yb 3+ , Tm 3+ composites were successfully synthesized via a facile hydrothermal method. The resultant Ti 3 C 2 −OH/Bi 2 WO 6 :Yb 3+ , Tm 3+ composites accompanied 2D/2D heterojunction with grid-like porous structure present a significant enhancement of photoactivity towards degradation of RhB under visible and NIR light irradiation. Specifically, the 0.2-Y/T-TB2.8 composite exhibits the best photocatalytic activity for RhB removal, in which the RhB degradation efficiency was 99.8% (Vis-NIR, 30 min), 91% (Vis, 30 min), and 48% (NIR, 160 min). The excellent photocatalytic activity of the composite is attributed to the grid-like porous structure endowing it with an enhanced RhB adsorption, favorable charge separation resulting from the outstanding conductivity of the Ti 3 C 2 −OH, and up-conversion mechanism via energy level transition of Yb 3+ /Tm 3+ . In addition, the radical capture experiments verified that the hole (h + ) plays the important role for degradation of RhB.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Fei Wang,Yao Zhu,Long Qian,Yuhao Yin,Ziyu Yuan,Yuting Dai,Tao Zhang,Dongya Yang,Fengxian Qiu
Precisely detecting organophosphorus pesticides (OPs) is paramount in upholding human safety and environmental preservation, especially in food safety. Herein, an electrochemical acetylcholinesterase (AChE) sensing platform entrapped in chitosan (Chit) on the glassy carbon electrodes (GCEs) decorated with Pt/MoS 2 /Ti 3 C 2 MXene (Pt/MoS 2 /TM) was constructed for the detection of chlorpyrifos . It is worth noting that Pt/MoS 2 /TM possesses good biocompatibility, remarkable electrical conductivity , environmental stability and large specific surface area . Besides, the heterostructure formed by the composite of TM and MoS 2 improves the conductivity and maintains the original structure, which is conducive to improving the electrochemical property . The coordination effect between the individual components enables the even distribution of functional components and enhances the electrochemical performance of the biosensor (AChE-Chit/Pt/MoS 2 /TM). Under optimal efficiency and sensitivity, the AChE-Chit/Pt/MoS 2 /TM/GCE sensing platform exerts comparable analytical performance and a wide concentration range of chlorpyrifos from 10 −12 to 10 −6 M as well as a low limit of detection (4.71 × 10 −13 M). Furthermore, the biosensor is utilized to detect OPs concerning three kinds of fruits and vegetables with good feasibility and recoveries (94.81% to 104.0%). This work would provide a new scheme to develop high-sensitivity sensors based on the two-dimensional nanosheet/laminar hybrid structure for practical applications in environmental monitoring and agricultural product detection.
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