INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
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IF 3.764
Ke Wang,Xianhe Li,Nan Wang,Quanhao Shen,Maochang Liu,Jiancheng Zhou,Naixu Li
Solar photocatalysis has long relied on the rational design of semiconductor photocatalysts. Herein, a ternary meso-TiO2@ZnIn2S4/Ti3C2 MXene photocatalyst is prepared and demonstrated with a core–shell structure accompanied by few-layered Ti3C2 Mxene on the ZnIn2S4 shell. The success of the synthesis depends on a two-step method consisting of hydrothermal and electrostatic self-assembly procedures. The ternary heterojunction exhibits a good behavior for photocatalytic CO2 reduction. A mechanism study of the photocatalytic reaction indicates that the photogenerated charges transfer in a Z-scheme pathway. Moreover, the construction of the Schottky junction between metallic Ti3C2 and TiO2@ZnIn2S4 is extremely effective for the reduction reaction. Consequently, the photocatalytic rates toward CO and CH4 production are up to 30.5 and 34.0 μmol/g within 3 h of illumination by simulated sunlight, respectively, while the CH4 selectivity reaches 52.7%. This work provides a good strategy to achieve highly efficient photocatalytic CO2 reduction.
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高影响因子
Journal of Environmental Chemical Engineering
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2020
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IF 4.3
Yi Cui,Dongao Zhang,Kelin Shen,Siqing Nie,Meiying Liu,Hongye Huang,Fengjie Deng,Naigen Zhou,Xiaoyong Zhang,Yen Wei
MXene has emerged as one of the most interest two-dimensional layered materials that has been extensively explored for various applications. In this work, a novel biomimetic method has been developed for the first time to fabricate Ti 3 C 2 MXene based magnetic Fe 3 O 4 composites that relied on the self-polymerization of dopamine and subsequent mild temperature pyrolysis. We demonstrated that many organic dyes could be rapidly degraded by the MXene-MNPs composites through Fenton reaction with extremely high efficiency. The degradation efficiency could be greater than 97 % under the optimized experimental conditions. Moreover, the catalysts displayed a good recyclable property after five continuous cycles. Electron paramagnetic resonance analysis and quenching results indicated that both OH and O 2 − were the reactive species and involved in the degradation process. Owing to the universality and mild reaction conditions of mussel-inspired biomimetic method, many other multifunctional composites with great research interest could also be fabricated. We also believe that this work will provide some new insights for fabrication of highly efficient catalysts for advanced oxidation processes and exploring the critical roles of polydopamine in advanced oxidation procedures.
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ACS Sustainable Chemistry & Engineering
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2021
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IF 8.198
Mao-Cheng Liu,Bin-Mei Zhang,Yu-Shan Zhang,Yu-Xia Hu
Ti3C2 has been considered as a potential material for lithium-ion storage because of its abundant surface terminals, excellent metal-like conductivity, and modifiable layered structure. However, the Li+ diffusion rate in interlayer is limited by the small interlayer spacing determined by the van der Waals forces. Herein, the dehydration condensation reaction between amino-functionalized Ti3C2 (Ti3C2-NH2) and maleic acid (MA) molecules was utilized to enlarge the interlayer spacing of Ti3C2. The MA molecules were successfully welded into interlayers of Ti3C2 by HN–C═O bonds (namely, chemical welding) and MA chemical welded Ti3C2 (MA-Ti3C2) with self-adaption layered structure were obtained. The MA molecules can contribute double effects to the layered structure of Ti3C2, and they act as chains to remit the volume change during Li+ insertion and serve as pillars to enhance the structure stability during Li+ extraction. The MA-Ti3C2 exhibits an interlayer spacing of 1.28 nm, a fast Li+ diffusion rate (1.4 × 10–8 to 5.8 × 10–7 cm2 s–1), and improved Li+ storage performance. The MA-Ti3C2//AC lithium-ion capacitor (LIC) demonstrates an excellent energy density of 102.5 Wh kg–1 at 200 W kg–1 and cycle stability with 76.3% at 1.0 A g–1 after 1000 cycles. This novel chemical welding delivers an effective perspective for modifying the layered structure, enhancing the structure stability, and achieving fast Li+ diffusion and high-rate capability of two-dimension materials.
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CERAMICS INTERNATIONAL
·
2019
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IF 3.45
Peiyao Lin,Jun Shen,Xiaohui Yu,Qinqin Liu,Dongsheng Li,Hua Tang
construction of the Schottky-junction is considered to be a valid route to boost the spatial charge separation and transfer of the photocatalytic system. Herein, two-dimensional (2D) O-doped g-C 3 N 4 nanosheets were prepared by an annealing route, and then a 2D/2D Ti 3 C 2 MXene/O-doped g-C 3 N 4 Schottky-junction was fabricated using an in-situ electrostatic assembly of negatively charged Ti 3 C 2 MXene and positively charged O-doped g-C 3 N 4 nanosheets. The as-prepared Ti 3 C 2 MXene/O-doped g-C 3 N 4 Schottky-junction exhibited almost two times enhanced hydrogen evolution (25124 μmol/g/h) in comparison to pristine O-doped g-C 3 N 4 (13745 μmol/g/h) and Ti 3 C 2 MXene/pristine C 3 N 4 (15573 μmol/g/h). Based on fully characterizations and theory calculation, the enhanced photocatalytic performance could be attributed to the synergy effect of intimate 2D/2D interfacial contact and the construction of Schottky-junction, which result in the short charge transport distance from HCN to Ti 3 C 2 MXene and efficient separation of the photo-generated charge. This study will provide new insight into developing 2D/2D Schottky-junction photocatalysts for the solution of the energy crisis.
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高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 38
·5440-5451
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IF 2.6
Xiaoyun Ye,Hangyu Zhong,Yumei Zhang,Xuehua Liu,Wei Tian,Li-An Ma,Qianting Wang
Previous studies on photocatalytic technology have shown that doping co-catalysts and constructing composite heterojunctions are effective strategies for improving the photocatalyst performance. The Ti3C2/SrTiO3/g-C3N4 composite photocatalyst with a gradient heterostructure was prepared by the high-temperature calcination method with Ti3C2 as the co-catalyst. The effects of g-C3N4 content on the microstructure and hydrogen evolution rate of the Ti3C2/SrTiO3/g-C3N4 composites were investigated under simulated sunlight. The results showed that the photocatalyst with 60 wt% of g-C3N4 had the optimal hydrogen evolution rate of 1733.13 μmol g−1 h−1 after simulated sunlight irradiation for 4 h, which was approximately 3.3 times higher than that of Ti3C2/SrTiO3. After four photocatalytic hydrogen evolution cycles, no significant decrease in the hydrogen evolution rate of the Ti3C2/SrTiO3/g-C3N4 composite was observed. This work may serve as a rational reference on the synergistic effect of heterostructures and cocatalysts to improve the separation effect of electron–hole pairs, thus improving the hydrogen evolution effect of the catalyst.
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LWT-FOOD SCIENCE AND TECHNOLOGY
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2024
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IF 6
Shuyue Xiong,Zijian Wu,Fang Li,Pei Zhao,Haitao Li,Huanxin Bao,Xu Yang
A self-assembled sensing interface based on Ti 3 C 2 MXene functionalized by aptamer had been successfully constructed in this work, which fully utilizes the electrical properties of Ti 3 C 2 MXene and the specific recognition ability of the aptamer. Subsequently, we studied the performance of the sensing interface using two antibiotic residues as examples. Under the optimal conditions, the sensing interface showed a linear range of 100 fM–1 μM and a limit of detection of 1 fM to detect kanamycin and tetracycline, furthermore the recovery rates were 97.15%–103.00% and 99.559%–106.36%, respectively. In addition, the sensing behaviors of aptamers specific recognition of target can be perceived by the interface, thereby exhibiting different electrical responses. Therefore, the self-assembled sensing interface not only provided a new avenue for the development of ultrasensitive technology in the food analysis field but also for investigating aptamer configurational transformations.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2024
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IF 8.1
Qingsong Zhu,Xinyu Lei,Xiaoqin Zha,Eman Ramadan Elsharkawy,Chenye Ren,Huiyuan Chang,Salah M. El-Bahy,Juanna Ren,Renjie Wang,Zeinhom M. El-Bahy,Zhanhu Guo
Ti 3 C 2 MXene (TM) has great application potential in the field of wave absorption and corrosion resistance due to its unique performance, such as high specific surface area, high electrical conductivity, excellent mechanical and good chemical stability. However, it is difficult to obtain uniformly dispersed TM in the resin matrix due to rapid agglomeration behavior. It is difficult to obtain uniformly dispersed Ti 3 C 2 MXene (TM) in the resin matrix due to rapid agglomeration behavior. Herein, a novel method is presented to improve the corrosion protection and dispersion of TM by polymerizing polyaniline (PANI) nanoparticles between layers. The waterborne epoxy (WEP) coating with PANI-TM had high mechanical properties including impact resistance, adhesion, and flexibility and wear resistance. The PANI-TM-WEP composites can effectively absorb more than 90 % of the electromagnetic waves and demonstrate a decreased glass transition temperature of WEP from 128.0 to 107.6 ℃. Moreover, the |Z| 0.01Hz value of the PANI-TM 0.5 % was 1.2369 × 10 6 Ω·cm 2 , which was one order of magnitude larger than WEP coating. The high-performance anticorrosion of PANI intercalated TM coating is attributed to the synergistic effect of impermeable TM nanosheets and passivation effect of PANI. Therefore, PANI-TM is a potential choice for applications in the fields of anticorrosion and microwave absorption.
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Environmental Science-Nano
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2025
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IF 5.1
Weibiao Ye,Wenhao Lao,Lan Wu,Dong-Xing Guan,Chao Zhang,Yiping Feng,Liang Mao
2D MXene nanosheets are increasingly attracting interest due to their promising applications in materials science and biomedicine. However, the environmental fate of MXenes, particularly their biotransformation, is poorly understood. Here, the biodegradability of Ti3C2 MXene nanosheets was investigated using a plant horseradish peroxidase (HRP)-mediated reaction. The degradation rates of Ti3C2 MXene nanosheets were determined to be first-order in both HRP and H2O2 dosage. Material characterizations and product identifications revealed that peroxidase-catalyzed the oxidation of Ti3C2 MXene in the presence of H2O2, resulting in the formation of holes on its basal plane, the generation of titanium dioxide (TiO2) nanoparticles, and the release of CO2. The assessment using Daphnia magna revealed visible toxicity and enrichment of Ti3C2 MXene to aquatic organisms, with LC50 values of pristine Ti3C2 MXene to Daphnia as 55.41, 7.24, and 2.97 mg L-1 at 48, 72, and 96 h, respectively. Substantial accumulation (74.30 μg Ti mg-1 of dry tissue) of Ti3C2 MXene by Daphnia was observed after 48 h of exposure. Furthermore, the biological effects of HRP-degraded Ti3C2 MXene products on Daphnia were examined. Although the toxicity to Daphnia was reduced, a substantial increase in the bioaccumulation of Ti3C2 MXene biodegradation products (137.36 μg Ti mg-1 of dry tissue) was observed. These findings reveal that enzymatic degradation alters the size and surface chemistry of Ti3C2 MXene, potentially changing its toxicity and altering its environmental compatibility.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Wenwen Tu,Yucheng Liu,Mingyan Chen,Lili Ma,Lingli Li,Bing Yang
In this study, an original photocatalytic self-cleaning composite membrane with the fabrication of graphene oxide (GO), polyacrylic acid (PAA), and g-C 3 N 4 (CN)/amorphous Ti-peroxo complexes (CATC) was prepared on the commercial cellulose acetate membrane (CAM) through the vacuum filtration approach to overcome the common membrane fouling issues. The material properties of composites or membranes were characterized. Here, the permeability and separation performance of membranes were optimized by CATC and PAA dosages. A series of membrane separation tests revealed that the produced membrane had better permeability and dye removal capabilities. A pure water flux (PWF) of the GO/PAA/CATC (GPC) membrane was 30.95 L·m −2 ·h −1 , corresponding to 3.43 times in comparison to that of the pure GO membrane. The removal efficiencies for the GPC membrane towards methylene blue (MB), rhodamine b (RhB), Cu(NO 3 ) 2 , and congo red (CR) were over 99% due to the hydrogen bond, π-π, electrostatic, and physical sieving effects. Also, the GPC membrane demonstrated a favorable separation performance towards oil/water emulsion (over 98%). In addition, the GPC membrane maintained stable rejections towards MB, CR, RhB, and Cu(NO 3 ) 2 at pH 3, 5, 7, 9, and 11 environments. Meanwhile, the self-cleaning GPC membrane was endowed with satisfactory reusability after 6 cycles because of the photocatalytic effect at the roles of h + , O 2 − , and OH free radicals. Hence, it can be expected that the GPC membrane synthesized in this study poses a favorable utilization capability in wastewater treatment.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Hao Siyu,Zhu Qingsong,Peng Xingna,Fan Jiayi,He Zimeng,Li Wei
Given the rapid advancements in digital and communication technology, electromagnetic wave pollution has emerged as a pressing concern for society. In addition, wave-absorbing materials are typically utilized in complex and dynamic environments, where they are susceptible to corrosion, which can result in a reduction in their effectiveness. Herein we synthesized a polypyrrole functionalized Ti 3 C 2 MXene (PPy-TM) hybrid with significant electromagnetic wave absorption and superior corrosion resistance by in situ polymerization method, which due to the in situ polymerization process of PPy on TM's surface causes the smoothness of TM's surface to turn coarse. The composite exhibited an optimal reflection loss of − 35.5 dB at 3.60 GHz for a 7.50 mm thickness. Additionally, the value of |Z| 0.01 Hz for PPy-TM 0.5% (5.1218 × 10 4 Ω cm 2 ) was an order of magnitude higher than the WEP (7.9778 × 10 3 Ω cm 2 ) coating after 30 days of exposure to 3.5 wt% NaCl electrolyte. This study establishes a benchmark for designing next-generation materials that integrate robust microwave absorption with long-term corrosion protection.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
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IF 11.2
Huanmin Liu,Chao Wu,Kangle Lv,Dingguo Tang,Qin Li
Photogenerated charge separation is a challenging step in semiconductor-based photosynthesis. Though numerous efforts have been devoted to developing multi-component photocatalyst heterostructures for improving charge separation efficiency, the short distance between electrons and holes-aggregated regions still leads to undesirable charge recombination. Herein, a facile and commercial in-situ synthesis method was designed to directly prepare a three-component Au–carbon–TiO 2 photocatalyst from Ti 3 C 2 MXene , air, CO 2 , and HAuCl 4 , in which the carbon layer bridged Au and TiO 2 nanoparticles for stable and efficient photocatalytic hydrogen production. Kelvin probe measurements and density functional theory (DFT) calculations demonstrated that a multi-interfacial charge transmission network was successfully constructed to achieve a directional and long-distance spatial charge separation/transfer channel between TiO 2 and Au through carbon layer, desirably inhibiting the recombination of photogenerated charge carriers. The hydrogen production rate of the formed three-component Au/C–TiO 2 (CTA) photocatalyst was demonstrated to be 27 times higher than that of Au–TiO 2 , which also surpassed many reported Ti 3 C 2 MXene-derived carbon–TiO 2 photocatalysts. This work sheds light on the ingenious use of 2D MXene to form a well-behaved TiO 2 -based photocatalytic system and helps to propose future design principles in accelerating charge transfer.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124205
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IF 7.5
Kaige Chen,Jie Li,Yongxiang Wang,Yong Dai,Yongming Luo,Xiaohua Cao,Xiaoping Xing
Photothermal conversion of CO 2 to methane offers a promising pathway for simultaneous carbon recycling and renewable energy storage. To date, Ni-based catalysts dominate CO 2 methanation. However, their low-temperature activity under photothermal conditions still requires improvement. MTiO 2 derived from Ti 3 C 2 MXene retains its two-dimensional (2D) layered structure and excellent photothermal conversion properties. Herein, we synthesized Ru-Ni@MTiO 2 catalysts through hydrothermal treatment of Ni-impregnated MTiO 2 with controlled Ru loading ( x = 1, 3 and 5 wt%). The optimal 3Ru-Ni@MTiO 2 catalyst achieved a CH 4 production rate of 86.25 mmol·g −1 ·h −1 at 300 °C, which is 1.3-fold higher than that of the Ru-free Ni@MTiO 2 counterpart. The superior catalytic performance stems from the synergistic electronic effect between Ni and Ru and their dual-site cooperation. Electron transfer from both Ru and MTiO 2 to Ni sites elevates the electron density of metallic Ni, which weakens the H-H bond and accelerates the dissociative adsorption of H 2 . Furthermore, Ru loading not only broadens the light absorption range and promotes photogenerated charge separation, but also increases the density of moderate basic sites, thus boosting CO 2 adsorption and activation. This work provides new insights into the design of bimetallic photothermal catalysts for CO 2 methanation.
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