JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Tao Ke,Shuyi Shen,Krishnamoorthy Rajavel,Kun Yang,Daohui Lin
Construction of heterojunction and nitrogen doping is an effective approach for synthesizing photocatalysts with high quantum yield and efficient electron-hole separation. 2D MXene Ti 3 C 2 has been considered a good carbonaceous nanomaterial for designing heterojunction, while the original surface groups and stacked structure limit the electron-hole separation. Herein, a hybrid of nitrogen-doped Ti 3 C 2 nanosheets and TiO 2 nanoparticles (NPs) composed of TiO 2 NPs in situ growing on isopropyl amine (iPA) modified Ti 3 C 2 (iN-Ti 3 C 2 ) was developed for the first time. The novel iN-Ti 3 C 2 /TiO 2 hybrid exhibited an excellent ultraviolet-light photodegradation of methylene blue (MB), with a degradation rate (0.02642 min −1 ) significantly higher than that of pure TiO 2 NPs, bulk-Ti 3 C 2 /TiO 2 , dimethyl sulfoxide modified Ti 3 C 2 /TiO 2 hybrid, and hydrazine monohydrate modified Ti 3 C 2 /TiO 2 hybrid. The formation of heterojunction between iN-Ti 3 C 2 and TiO 2 and its role in the photocatalysis were systematically analyzed using various characterization techniques and density functional theory calculation. The iPA modification exfoliated Ti 3 C 2 and doped N on Ti 3 C 2 nanosheets; the in situ grown TiO 2 NPs formed efficient heterojunctions with the nanosheets; the N-doping facilitated electron migration in Ti 3 C 2 and inhibited the recombination of photogenerated electron-hole pairs; •OH dominated the photodegradation of MB. This work provides a new approach of constructing efficient photocatalysts for the treatment of organics-polluted water.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Chao Liu,Wen Xiao,Xingyu Liu,Qiang Wang,Jiawei Hu,Siyuan Zhang,Jianguang Xu,Qinfang Zhang,Zhigang Zou
As a highly toxic heavy metal, Cr(VI) reduction by developing high-efficiency photocatalysts is of great significance. Herein, we firstly design few-layer Ti 3 C 2 MXene (FTM) by the hand-operated shaking, showing dual advantages of structural stability and more exposed reactive sites. Then, a refluxed process is performed to fabricate FTM/CaIn 2 S 4 (FTC) composites, where 2D CaIn 2 S 4 (CIS) nanoplates are closely connected with 2D FTM to form Schottky junction. The optimal 1-FTC with the FTM/CIS mass ratio of 1 wt.% exhibits the highest activity toward photocatalytic Cr(VI) reduction under visible light. It is well elucidated that the broadened light absorption range and promoted charge carrier separation rate induced by the introduction of FTM are responsible for improving photocatalytic activity of CIS. During Cr(VI) photoreduction, 1-FTC possesses excellent photo-stability and reusability. The effects of catalyst mass, coexisting ions, water sources and pH values on the Cr(VI) photoreduction efficiency are investigated. Photogenerated • O 2 − and e − are the main radical species accounting for Cr(VI) photoreduction over 1-FTC. The photocatalytic mechanism along with Cr(VI) removal pathway is exploited. This work may provide some insights into constructing FTM-based Schottky junctions for the efficient water purification.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 21
·5096
·
IF 4.2
Tao Tang,Xiaoyu Dou,Haoran Zhang,Hexu Wang,Ming Li,Guanghui Hu,Jianfeng Wen,Li Jiang
In recent years, halide perovskite materials have become widely used in solar cells, photovoltaics, and LEDs, as well as photocatalysis. Lead-free perovskite Cs 3 Bi 2 I 9 has been demonstrated as an effective photocatalyst; however, the fast recombination of the photogenerated carriers hinders further improvements of its photocatalytic activity. In this work, Ti 3 C 2 was composited with Cs 3 Bi 2 I 9 to promote the transfer and separation of photogenerated carriers, and thus the pollutant degradation efficiency was effectively improved. The visible-light photocatalytic reduction of Cs 3 Bi 2 I 9 /Ti 3 C 2 on rhodamine B (RhB), methylene blue (MB), and malachite green (MG) was as high as 97.3%, 96%, and 98.8%, respectively, improvements of almost 31.2%, 37.8%, and 37.2% compared to that of sole Cs 3 Bi 2 I 9 . Our study provides a simple way to enhance the photocatalytic activity of lead-free halide perovskites.
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
PubMed
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2020
·Vol. 22
·期 4
·1901369
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IF 3.217
Xuan Yin,Jie Jin,Xinchun Chen,Andreas Rosenkranz,Jianbin Luo
The 2D Ti 3 C 2 /graphene quantum dots (GQDs) composite coating contains numerous merits, which offers underlying solutions for lubrication issues in common conditions. Herein, specific efforts are devoted to explore and develop the antiwear interfacial performances of 2D Ti 3 C 2 /GQDs hybrid multicoating in common environment. In addition, combination with nanodiamond would impose significant effects on improving lubricity of binary composite coating to obtain long-durability ternary composite coating. Meanwhile, macroscale and atomicscale characterizations are utilized to detect the lubrication behavior of binary and ternary composite coating to illuminate the influence of compositions on the establishment of ultralow-wear interfaces on slip process. These testing results highlight an outspread lubrication mechanism for 2D Ti 3 C 2 /GQDs hybrid multicoating. They suggest that 2D Ti 3 C 2 /GQDs and 2D Ti 3 C 2 /nanodiamond/GQDs composite coating exhibit ultralow wear with rubbing against polytetrafluoroethylene ball. A newly nanostructured tribofilm is formed on the sliding contact. Also the 2D Ti 3 C 2 /nanodiamond/GQDs ternary coating has long-durability and ultralow-wear during sliding for a long time.
研究领域:
材料科学
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表面工程
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摩擦学
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DOI
高影响因子
Analytical Methods
·
2025
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IF 2.6
Wei Liu,Honghuang Li,Deming Li,Xiaoting Liu,Lei Liu,Zhiyong Zhu,Haoyu Hao,Qiongyao Zeng,Yanhua Sun
In this work, MWCNTs/Ti3C2 nanocomposites have been synthesized by a convenient method and characterized in terms of structure and properties by SEM, FT-IR, XPS and electrochemical methods. The electrochemical sensor developed by MWCNTs/Ti3C2 nanocomposites has good electrochemical properties. The sensor has good electrocatalytic performance for H2O2 and was used to detect the concentration of H2O2. The sublinear range of detection was 0.05-1080 μM and the detection limit was 0.017 μM (S/N=3). The sensor has strong anti-interference performance, stability and reproducibility, and has shown good performance in real sample detection.
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
Environmental Science-Nano
·
2025
·
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.
研究领域:
环境科学
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纳米生物学
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毒理学
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产品关联
DOI
高影响因子
ChemCatChem
·
2025
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IF 3.9
Dancheng Zhu,Yuchen Cao,Yuchen Qian,Weijie Yu,Yuxuan Xu,Hao Xu,Jun Qiao,Chao Shen,Jiabin Shen
Graphical This study develops amino-modified Ti 3 C 2 /Mg 3 Al-LDH composites as solid base catalysts for aldol reactions. The composite reduces surface agglomeration, enhances active site exposure, and increases basicity, achieving 99% product yield under optimized conditions (60 °C, 30 min). It retains > 91% efficiency over five cycles, demonstrating superior stability and catalytic performance compared to non-modified LDHs. Aldol reaction is an important class of industrially catalyzed reactions for synthesizing high-value fine chemicals. Traditionally conducted under alkaline conditions, these reactions often utilize liquid alkali catalysts, which present challenges such as difficult separation and recovery and undesirable side reactions promoted by the catalyst. Solid base catalysts have received much attention and research in recent years to address these issues. In this study, magnesium–aluminum layered double hydroxides (MgAl-LDHs) were synthesized using magnesium chloride hexahydrate, aluminum chloride hexahydrate, and anhydrous sodium carbonate. These were subsequently combined with amino-modified Ti 3 C 2 to form composite materials. Characterization of the prepared Mg 3 Al-LDH/Ti 3 C 2 -NH 2 composites was conducted using X-ray diffractometer (XRD), scanning electron microscope (SEM), infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) confirming the successful preparation of the composite material. The prepared Mg 3 Al-LDH/Ti 3 C 2 -NH 2 was applied as a catalyst in the aldol condensation reaction. Key factors such as catalyst dosage, reaction time, acetone amount, and temperature were investigated to optimize catalytic efficiency. Under optimal conditions—100 mg Mg 3 Al-LDH/Ti 3 C 2 -NH 2 , a reaction time of 0.5 h, 200 mg of p -nitrobenzaldehyde, 1 mL of acetone, and a reaction temperature of 60 °C—a yield of 99% was achieved. The result demonstrates that Mg 3 Al-LDH/Ti 3 C 2 -NH 2 exhibits excellent catalytic activity and holds promising potential for application in solid base catalysis.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
Nanoscale
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2025
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IF 5.1
Cai-Xia Zheng,Ai-Jun Jiao,zhenhai fu,Yu-Xia Hu,Min-Peng Li,Hong-Yan Li,Wei-Hai Yi,Xiao-Rui Wang,Meng-Chao Liu,Fuliang Zhu,Mao-Cheng Liu
MXenes are promising 2D-layered anode materials for rechargeable batteries due to their outstanding electrical conductivity, high specific surface area, and tunable surface functional groups. However, serious self-stacking of the layered structure and the sluggish sodium diffusion kinetics lead to inferior rate capability and cycling stability. Herein, an organic molecular pillaring strategy is reported to enlarge the interlayer spacing of Ti3C2 through a dehydration condensation reaction between the •COOH groups in 3,3',4,4'-benzene tetracarboxylic acid (BTCA) molecules and the•NH2 groups of Ti3C2-NH2, which enables rigid organic BTCA molecules to be chemically pillared into the interlayers of Ti3C2 (Ti3C2-BTCA). The rigid organic BTCA molecules not only play a dual role of pillar and strain effects in Ti3C2 layers, but also expand the interlayer spacing. Therefore, they can significantly enhance the rate capability and cycling stability of Ti3C2. The Ti3C2-BTCA exhibits a reversible capacity of 182.30 mAh g-1 at a current density of 0.1 A g-1 after 2000 cycles, and maintained a reversible capacity of 77.9 %. Moreover, the sodium diffusion coefficients of Ti3C2-BTCA are 6.6×10-7 cm2 s-1. Ti3C2-BTCA shows a relatively low sodium diffusion barrier and a high sodium diffusion coefficient compared with Ti3C2. The interlayer engineering based on the organic molecular pillaring strategy is significant and meaningful for expanding the interlayer spacing of Ti3C2. This work provides theoretical guidance and new perspectives for the development of Na+ storage materials with high-rate capability.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
npj Clean Water
·
2024
·Vol. 7
·期 1
·1-10
·
IF 10.4
Li Wanxin,Shu Dawu,An Fangfang,Liu Ruigang,Shan Juchuan,Han Bo,Cao Shaolei
Rapid activation of sodium persulfate (SPS) for the degradation of C.I. Reactive Red 218 (RR218) was achieved using Ti 3 C 2 MXene reduction of trace Fe 3+ . The degradation rate of RR218 reached 97.7% using a mixture containing 3 g L −1 of SPS, 3.35 mg L −1 of Fe 3+ and 60 mg L −1 of MXene stirred at 25 °C for 30 min. The intense reduction of Ti 3 C 2 MXene triggers the Fe 3+ /Fe 2+ cycle thereby accelerating the activation of SPS. When reactive dyes were degraded by Fe 3+ /SPS/MXene process, ·OH played a major role. The dye degradation capacity of the Fe 3+ /SPS/MXene process decreased after 5 cycles of recycling. In addition, the wastewater treated under these conditions resulted in high dyeing efficiencies in reuse experiments. This study not only improves the understanding of the catalytic reaction of MXene but also provides a wastewater treatment and reuse process with low metal consumption and high efficiency.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 39
·20650-20657
·
IF 11.301
Ruiyi Gan,Yiling Liu,Na Yang,Cheng Tong,Mingming Deng,Qin Dong,Xianyi Tang,Na Fu,Cunpu Li,Zidong Wei
Li metal anodes, which possess ultrahigh theoretical capacity, are considered the ultimate solution for high energy density batteries. However, issues regarding safety and rapid electrode degradation due to Li dendrite growth have restricted the commercialization of Li metal anodes for several decades. Herein, a stable, dendrite-free Li metal anode with a hairy-layered architecture is reported, which is realized though a facile electrochemical deposition of Li on a lithiophilic LTO/Ti3C2 composite. The simultaneous formation of the lithiophilic composite could induce the uniform deposition of Li ions and acted as an interlayer skeleton for the intercalation of Li ions. A microscale uniform electric field could also be formed to regulate the Li-ion deposition behaviour. Thus, the growth of dendrites could be inhibited, the formation of dead Li could be prevented, and a stable, long-life Li metal anode could be realized. The obtained Li/LTO/Ti3C2/Cu electrode could reversibly charge/discharge for 2000 h with a high current of 1 mA cm−2 and an ultralow voltage hysteresis of 20 mV. Full batteries with the Li/LTO/Ti3C2/Cu anode exhibit excellent electrochemical performance. This work provides a promising anode design strategy for the fabrication of high-performance and safe Li metal batteries.
研究领域:
材料科学
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电化学
·
能源存储
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jun Yang,Quanxi Zhu,Zhigang Xie,Yajing Wang,Jiankang Wang,Yuan Peng,Yingying Fang,Lihua Deng,Taiping Xie,Longjun Xu
It is very significant to boost separation efficiency of photoinduced charge carriers and to extend absorption light range from ultraviolet light into visible light region for photocatalysts . Here, Ti 3 C 2 incorporation boosted the separation efficiency of photogenerated carriers of MoS 2 , extended absorption light region, heightened the absorption intensity of visible light, and enhanced photocatalytic stability. The rhodamine B (RhB) solution could be completely degraded using MoS 2 /Ti 3 C 2 under visible light after only 30 min. The comparing evaluation of photocatalytic activity signified that the reaction kinetics of RhB photodegradation over MoS 2 /Ti 3 C 2 increased 1.4 and 3 times under UV light and visible light irradiation , respectively. Experimental tests and density functional theory (DFT) calculation confirmed the formation of MoS 2 /Ti 3 C 2 Schottky junction, in which Ti 3 C 2 served as electron sink. The photogenerated electrons in MoS 2 easily transferred to Ti 3 C 2 phase due to driving force of built in electric field, which realized efficient separation of photocarriers and prolonged the life span of photoproduced holes. We sincerely hoped this catalyst could be widely applied in wastewater treatment field.
研究领域:
材料科学
·
环境科学
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理论计算
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Xiaolei Bao,Huiliang Li,Zeyan Wang,Fengxia Tong,Mu Liu,Zhaoke Zheng,Peng Wang,Hefeng Cheng,Yuanyuan Liu,Ying Dai,Yuchen Fan,Zhiyong Li,Baibiao Huang
Photocatalytic selective oxidation of alcohols into corresponding aldehydes has received enormous attention. However, it remains a great challenge to explore photocatalysts with high conversion efficiency and selectivity. Herein, we developed a composite consisted of TiO 2 and Ti 3 C 2 through a simple calcination of Ti 3 C 2 nanosheets. It was found that Ti 3 C 2 could stabilize the oxygen vacancies and Ti 3+ species in the TiO 2 /Ti 3 C 2 composite, which could subsequent promote the production of active intermediates during the photocatalytic oxidation of benzyl alcohol (BA) to benzaldehyde (BAD). Additionally, the valence band of TiO 2 in the composites was found to be up-shifted, which would avoid the further oxidation of BAD and enhance selectivity. As a result, the optimal composite exhibits the BA conversion efficiency of 97 % and BAD selectivity of 98 %, which is 2.8 and 1.2 folds higher than that of pristine TiO 2 . Our work may provide insights for designing efficient photocatalysts for selective oxidation of alcohols.
研究领域:
材料科学
·
催化化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）