INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Yuanhao Dong,Jianhong Liu,Yuan Chen,Tao Zhu,Yuanhong Li,Chaoliang Zhang,Xin Zeng,Qianming Chen,Qiang Peng
Methicillin-resistant Staphylococcus aureus (MRSA) has strong resistance to antibiotic therapy. In this regard, developing antibiotic-free antibacterial agents is of great significance to treat MRSA infections. Herein, we loaded Ti 3 C 2 T x MXene nanomaterial in the non-crosslinked chitosan (CS) hydrogel. The obtained MX-CS hydrogel is expected to not only adsorb MRSA cells via CS-MRSA interactions, but also gather the MXene-induced photothermal hyperthermia, achieving the efficient and intensive anti-MRSA photothermal therapy. As a result, under NIR irradiation (808 nm, 1.6 W/cm 2 , 5 min), MX-CS showed a greater photothermal effect than MXene alone did (30 μg/mL, 49.9 °C for MX-CS and 46.5 °C for MXene). Importantly, MRSA cells were rapidly adsorbed on MX-CS hydrogel (containing 30 μg/mL MXene) and completely inhibited (99.18 %) under NIR irradiation for 5 min. In contrast, MXene (30 μg/mL) and CS hydrogel alone only inhibited 64.52 % and 23.72 % MRSA, respectively, significantly lower than the inhibition caused by MX-CS ( P < 0.001). Interestingly, when the hyperthermia was depleted by a 37 °C water bath, the bacterial inhibition rate of MX-CS significantly decreased to 24.65 %. In conclusion, MX-CS hydrogel has a remarkable synergistic anti-MRSA activity by gathering MRSA cells and MXene-induced hyperthermia, and may have great potentials in treating MRSA-infected diseases.
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Nano Research
·
2023
·Vol. 16
·期 7
·8902-8909
·
IF 9.9
Jiang Sisi,Sun Tong,Gu Chaoqun,Ma Yingfei,Wang Zhenyu,Wang Dengchao,Wang Zonghua
MXene, a family of two-dimensional (2D) transition metal carbides and nitrides, has intriguing electrochemical energy storage and electrocatalysis applications. Introducing the electronic metal-support interaction (EMSI) effect is one effective strategy to optimize the catalytic efficiency for MXene-based composites. However, most of the studies concentrate on optimizing the performance of metals rather than supported substrates by using this strategy. In this work, we mainly investigate the influence of an EMSI effect on the performance of the supported substrate (Ti 3 C 2 T x MXene). Detailed scanning electrochemical microscopy and numerical simulations results reveal that the charge distribution on the Ti 3 C 2 T x basal plane (approximate 100 nm-radius) surrounding Au nanoparticles (20 nm-radius) was significantly enhanced as a result of —O being the majority surface functional group on Ti 3 C 2 T x that was attached to Au nanoparticle, and the related hydrogen evolution reaction (HER) activity was much better than that of the unaffected Ti 3 C 2 T x basal plane, which even can be comparable to that of Au. This finding will be helpful for designing new strategies to enhance the overall catalytic performance of various MXene-based composites.
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CHEMICAL ENGINEERING JOURNAL
·
2018
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IF 6.735
Dejian Yan,Xingchen Fu,Zhichao Shang,Jikai Liu,He'an Luo
Bismuth vanadate (BiVO 4 ) has been envisioned as a promising photoanode material for photoelectrochemical (PEC) water oxidation. However, the PEC performance of BiVO 4 based photoanodes is usually dragged down by the poor charge transport and slow kinetics for an oxygen evolution reaction (OER). Here, a novel composite photoanode of Ti 3 C 2 T X /BiVO 4 was fabricated for the first time by spin coating thin Ti 3 C 2 T X (MXene) flakes onto the surface of a BiVO 4 film grown on the FTO substrate. A facile re-annealing treatment of bare BiVO 4 /FTO photoanode in argon can impressively boost the photocurrent density from 2.1 mA cm −2 up to 2.95 mA cm −2 . Experimentally, we clearly elucidated that by re-annealing, the interfacial (BiVO 4 /FTO) charge recombination could be effectively suppressed due to the better contact between the BiVO 4 film and FTO. The coating of thin Ti 3 C 2 T X flakes onto the BiVO 4 film would further increase the photocurrent density to 3.45 mA cm −2 (measured at 1.23 V vs. reversible hydrogen electrode (RHE) under 1 sun illumination), exhibiting a photoconversion efficiency of 0.78% and a surface charge separation efficiency of 73%. The outstanding PEC performance can be mainly ascribed to the coating of the thin Ti 3 C 2 T X (MXene) flakes which function as co-catalysts, facilitating the charge transfer of the photogenerated carriers and reducing the charge recombination on the BiVO 4 surface. Our findings provide a facile re-annealing strategy and a novel two-dimensional (2D) material of Ti 3 C 2 T X (MXene) as co-catalysts to improve the performance of the BiVO 4 photoanode for PEC water oxidation.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Donghai Wu,Chenchen Yi,Guanghua Lu,Chao Zhou,Jun Hou
Pharmaceuticals and personal care products (PPCPs) pose potential risks to aquatic ecosystems and human health. This work developed an ozonation-assisted electrochemical filtration (OAEF) system using a Ti 3 C 2 T x /CNTs composite membrane electrode and systematically investigated its efficiency, mechanisms, and practicality for PPCPs removal. The results suggest that the excellent adsorption and hydrophilic properties of Ti 3 C 2 T x , combined with its formation of an optimized membrane structure when mixed with CNTs, significantly enhanced the pollutant adsorption capacity and water permeation flux of fabricated electrode. Ozone incorporation in the electrochemical filtration process facilitated pollutant abatement, achieving approximately 99 % degradation and 42 % mineralization of fluoxetine (FLX), a representative PPCP. Moreover, the OAEF system demonstrated broad pH suitability and good stability, effectively detoxifying FLX-contaminated wastewater. The analysis of oxidants and electrode component evolution in the OAEF system, combined with density functional theory (DFT) calculations, revealed that enhanced mass transfer and electron transport promoted electro-peroxone initiation and reactive oxygen species (ROS) generation, thereby improving pollutant elimination and regenerating the adsorption capacity of electrode. Further analysis of 34 PPCPs treatment using quantitative structure-activity relationship (QSAR) models indicated that adsorption on the Ti 3 C 2 T x /CNTs was primarily influenced by pollutant solubility, C O bond content, dipole moment, and molecular weight, while degradation was significantly impacted by aromatic ring content, highest occupied molecular orbital (HOMO) energy, lowest unoccupied molecular orbital (LUMO) energy, and solubility. Additionally, the Ti 3 C 2 T x /CNTs membrane electrode exhibited satisfied fouling mitigation during the treatment of real surface water, suggesting that the OAEF process is feasible for practical applications.
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Energy & Environmental Materials
·
2024
·Vol. 7
·期 6
·e12756
·
IF 13
Zhongming Chen,Zhijian Du,La Li,Kai Jiang,Di Chen,Guozhen Shen
Thermally chargeable supercapacitors can collect low-grade heat generated by the human body and convert it into electricity as a power supply unit for wearable electronics. However, the low Seebeck coefficient and heat-to-electricity conversion efficiency hinder further application. In this paper, we designed a high-performance thermally chargeable supercapacitor device composed of ZnMn 2 O 4 @Ti 3 C 2 T x MXene composites (ZMO@Ti 3 C 2 T x MXene) electrode and UIO-66 metal–organic framework doped multichannel polyvinylidene fluoridehexafluoro-propylene ionogel electrolyte, which realized the thermoelectric conversion and electrical energy storage at the same time. This thermally chargeable supercapacitor device exhibited a high Seebeck coefficient of 55.4 mV K −1 , thermal voltage of 243 mV, and outstanding heat-to-electricity conversion efficiency of up to 6.48% at the temperature difference of 4.4 K. In addition, this device showed excellent charge–discharge cycling stability at high-temperature differences (3 K) and low-temperature differences (1 K), respectively. Connecting two thermally chargeable supercapacitor units in series, the generated output voltage of 500 mV further confirmed the stability of devices. When a single device was worn on the arm, a thermal voltage of 208.3 mV was obtained indicating the possibility of application in wearable electronics.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2024
·
IF 5.9
Cheng Yang,Yanmei Shi,Lixin Li,Zhihong Chen,Di Zhao,Weixia Zhu,Kai Hu
Bisphenol A (BPA) is widespread in the environment and has a serious impact on human body. In this study, a novel magnetic metal-organic frameworks@Ti 3 C 2 T x composite, noted as Fe 3 O 4 @Ti 3 C 2 T x /MOF, was prepared and used as adsorbent for the removal of BPA from environmental water. The adsorption parameters that affecting the removal efficiency of BPA, such as solution pH, contact time, adsorbent dosage, co-existing inorganic ions, ionic strength, and humic acid were investigated in detail. Accordingly, the removal efficiency of BPA by Fe 3 O 4 @Ti 3 C 2 T x /MOF was as much as 95 %. Adsorption studies showed that the proposed composite can provide a maximum adsorption capacity of 547.43 mg g −1 for BPA within 5 min, which was superior to most of the reported adsorbents. The adsorption process was consistent with the pseudo-second-order kinetics (K 2 , 1.1063 μg mg −1 min −1 ) and Freundlich isotherm model, indicating that the adsorption was depended by chemisorption and the heterogeneous surface. Furthermore, the thermodynamic results demonstrated the exothermic nature of the adsorption process (ΔH θ = −34.84 kJ mol −1 ). Most importantly, the magnetic properties of the Fe 3 O 4 @Ti 3 C 2 T x /MOF make it easy to collect, so it can be regenerated and reused for at least 4 cycles without significant loss of adsorption efficiency. Overall, the proposed composite can be applied to the efficient removal of BPA from water samples and could be potentially applicable for practical wastewater treatment.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Laizhao Guo,Shaojie Chu,Yun Li,Wentao Huang,Xiang Wang
Kiwifruit, renowned for its antioxidant properties and nutritional richness, faces challenges in maintaining quality during transportation, often leading to suboptimal products reaching the market. To address this issue, a wireless transmission flexible ethylene monitoring device (WFEMD) was developed. This device comprises a flexible ethylene gas sensor and a signal transmission processing unit integrated with electronic components, enabling real-time monitoring capabilities. In this study, the catalytic activity of Pd and Pd/Ti heterojunctions was leveraged to enhance the ethylene gas sensing. The impact of Ti3C2Tx modified with varying masses of Pd nanoparticles on ethylene gas response levels was investigated. The signal transmission processing unit, fabricated by using the laser direct-writing method, was optimized to collect signals from the flexible ethylene gas sensor, convert them into corresponding ethylene concentrations, and transmit data via an antenna. By introducing a random forest (RF) classification algorithm, a remarkable 97.5% accuracy in predicting kiwifruit ripeness grades was achieved. The algorithm facilitated precise classification by collecting key parameters such as ethylene and CO2 during transportation. The WFEMD enables real-time acquisition of kiwifruit ethylene gas information, which is transmitted wirelessly for data visualization and traceability via mobile terminals. This empowers managers with timely insights into ethylene emissions and ripeness predictions, facilitating informed decision-making processes.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qiqi Wang,Changjun Mu,Ya'nan Yu,Xia Feng,Yang He,Li Chen
Current patients with chronic kidney disease (CKD) suffer from either accumulation of advanced glycation end products (AGEs) or inefficient clearance of the middle molecule uremic toxins, threatening their long-term survival rate. In particular, conventional hemodialysis membranes cannot prevent AGEs formation because of continuous oxidative stress from reactive oxygen species (ROS). Herein, a persistent ROS scavenging and efficient uremic toxin clearance of hemodialysis membrane is proposed by the in situ deposition of a gallic acid-Ti 3 C 2 T x MXene (GA-MXene) n multilayers through a self-assembly method, where n denotes the number of deposition layers. These hemodialysis membranes have a highly interconnecting composite laminate with tunable pore size. In the dialysis experiment, the (GA-MXene) 2 membrane with the vertical nano-slits shows the highest middle molecule uremic toxin clearance of 80.0% compared with state-of-the-art hemodialysis membranes, which has been approximately equal to the clearance of small molecule urea. Furthermore, GA conferring efficient ROS scavenging rate over dialysis treatment time allows anti-oxidative activities to inhibit AGEs’ formation. (GA-MXene) n multilayers enhanced the serum total antioxidant capacity and suppressed lipid peroxidation from oxidative damage. Ultimately, the (GA-MXene) n hemodialysis membranes provide excellent anticoagulant properties and cytocompatibility through the heparin-mimicking sulfonated Ti 3 C 2 T x MXene and biological activity of GA. This work facilitates the blood purification application of MXenes and opens up an avenue for developing functional multilayers for high-performance hemodialysis membranes and beyond.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mingxue Shi,Liguo Jin,Chaofeng Wang,Congyang Mao,Xiangmei Liu,Zhaoyang Li,Shengli Zhu,Hui Jiang,Zhenduo Cui,Yufeng Zheng,Shuilin Wu
Compared to phototherapy, microwave therapy has emerged as a promising approach for the treatment of deeply tissue-infected osteomyelitis owing to deep penetration ability, precise positioning heating, low damage to normal tissue. However, it is still significant to design materials with efficient microwave thermal conversion. In this paper, capacitor-like structure Ti 3 C 2 T x MXene/CNT is prepared to achieve high microwave thermal conversion efficiencies for safe and efficient microwave therapy through mechanisms associated with polarization and induced electric fields. Ti 3 C 2 T x MXene/CNT have been shown to achieve significant microwave thermal effects at varying thicknesses of tissue barrier and can rapidly increase the temperature in a short period of time, effectively causing 98.80% eradication of Staphylococcus aureus and 99.24% eradication of Escherichia coli within 20 min. Combined with remarkable antimicrobial effect and acceptable biocompatibility, this may provide reference for the safe and effective microwave therapy strategies to treat osteomyelitis.
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ACS Applied Electronic Materials
·
2024
·
IF 4.3
Zhihua Zhao,Yao Wang,Bo Li,Pu Chen,Guixin Jin,Xiaoqing Shen,Zhigang Shao,Lan Wu
With the rapid advancement of wearable technology, multifunctional sensors have garnered significant attention due to their potential applications in environmental monitoring, health diagnostics, and human−machine interaction. Despite their promise, challenges, such as limited flexibility, insufficient sensitivity, and complex production processes, have hindered their practical deployment. This study presents the fabrication of a multifunctional flexible sensor based on PU-supported Ti3C2Tx/TiO2/PPy yarns for both ammonia (NH3) gas sensing and human motion detection. Key innovations include the incorporation of polypyrrole (PPy) into the Ti3C2Tx MXene structure and the optimization of titanium dioxide (TiO2) content through varying hydrothermal times, which significantly enhance the gas sensing performance. The sensor demonstrates exceptional sensitivity and selectivity toward NH3, with a rapid response and recovery times. Additionally, the PU-supported composite yarns exhibit excellent mechanical flexibility and durability, maintaining stable performance under repeated stretching and bending cycles. In human motion detection, the sensor shows high sensitivity and reliable performance in monitoring various physical activities, making it highly suitable for applications in wearable electronics. These features ensure the sensor’s applicability in diverse settings, promoting safety and health in environments with potential ammonia exposure and enhancing human−machine interactions through accurate motion monitoring.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xin Guo,Hao Zhang,Ke Chen,Xiaodie Li,Xuran Yang,Chengming Xiao,Yiyuan Yao,Minjie Song,Junwen Qi,Yujun Zhou,Yue Yang,Zhigao Zhu,Jiansheng Li
Rational design of high-performance electrode materials is crucial for enhancing desalination performance of capacitive deionization (CDI). Here, ultrathin nitrogen-doped carbon/Ti 3 C 2 T x -TiN (NC/MX-TiN) heterostructure was developed by pyrolyzing zeolite imidazolate framework-8 (ZIF-8) nanoparticles sandwiched MXene (ZSM), which were formed by assembling ultrafine ZIF-8 nanoparticles with size of 20 nm on both sides of MXene nanosheets. The introduction of ultrasmall ZIF-8 particles allowed for in situ nitridation of the MXene during pyrolysis, forming consecutive TiN layers tightly connected to the internal MXene. The two-dimensional (2D) heterostructure exhibited remarkable properties, including high specific surface area and excellent conductivity. Additionally, the resulting TiN demonstrated exceptional redox capability, which significantly enhanced the performance of CDI and ensured cycling stability. Benefiting from these advantages, the NC/MX-TiN exhibited a maximum adsorption capacity of 45.6 mg g −1 and a steady cycling performance in oxygenated saline water over 50 cycles. This work explores the rational design and construction of MXene-based 2D heterostructure and broadens new horizons for the development of novel CDI electrode materials.
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ACS Nano
·
2024
·
IF 15.8
Peng Li,Henan Wang,Zhongshi Ju,Zhongzheng Jin,Jiangang Ma,Lin Yang,Xiaoning Zhao,Haiyang Xu,Yichun Liu
Hydrogels are emerging as stretchable electromagnetic interference (EMI) shielding materials because of their tissue-like mechanical properties and water-rich porous cellular structures. However, achieving high-performance hydrogel shields remains a challenge because enhancing conductivity often results in a compromise in deformation adoptability. This work proposes a treatment strategy involving sulfuric acid/titanium carbide MXene, which can simultaneously enhance the conductivity and stretchability of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/poly(vinyl alcohol) (PVA) double-network hydrogels. Multiple spectroscopic characterizations reveal that sulfuric acid promotes the linear conformation transition of the PEDOT molecular chain, while MXene increases charge delocalization and hydrogen bond cross-linking sites. The hydrogels, synthesized with a combined content of 0.6 wt % of MXene and PEDOT:PSS, exhibit an average X-band EMI SE of 41 dB. This performance is sustained at 94.5%, even following stretching and release at a strain of 200%. Interestingly, the EMI SE is found to linearly increase, reaching a value of 99 dB as the frequency is increased to 26.5 GHz. This increase is attributed to the enhanced water molecular polarization process, as supported by theoretical calculations of the impedance and attenuation constant. This work introduces a post-treatment technique that optimizes double-network hydrogels, providing deep insights into their EMI shielding mechanism and enabling high-performance EMI shielding with an ultralow conductive filler content.
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危险品化学品经营许可证（带存储）