JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Ning Qi,Yuexin Yi,Yacen Tang,Xingyan Liu,Yating Yuan,Ziping He,Xintong Shi,Yuyu Fang,Youzhou He,Siping Wei
Photocatalytic removal of tetracycline (TC) from wastewater is an advantageous method with green and efficient potentials, while the low light utilization and severe charge carrier recombination of conventional photocatalysts limit their practical application. The TiO 2 /Ti 3 C 2 derived from in-situ partly oxidation of Ti 3 C 2 MXene precursors on which Bi 2 MoO 6 (BMO) was tightly loaded was synthesized via a facile hydrothermal synthesis route. The introducing TiO 2 /Ti 3 C 2 accelerated the transfer of electrons, improving the efficiency of electron-hole separation, thus strengthened the photocatalytic performance. Under optimum conditions, the BMO/TiO 2 /Ti 3 C 2 composite significantly removed 87.54 % TC from wastewater within 150 min, which was higher than the original counterparts and remained almost unchanged after four cycles. The active species trapping experiments and ESR analysis displayed that •O 2 - played a dominant role in TC degradation. The possible degradation pathways were also deduced through liquid chromatography-mass spectrometry (LC-MS) analysis experiments, demonstrating that the terminal products of degradation were mainly CO 2 and H 2 O, confirming the potential of BMO/TiO 2 /Ti 3 C 2 photocatalyst for the environmentally friendly treatment of antibiotic pollutants in wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
LANGMUIR
·
2021
·
IF 3.882
Juanjuan Yin,Bingcheng Ge,Tifeng Jiao,Zhihui Qin,Meiqi Yu,Lexin Zhang,Qingrui Zhang,Qiuming Peng
Photocatalysts play an increasingly important role in environmental remediation polluted by industrial wastewater. However, the preparation of adsorbents and catalysts with high activity by simple and easy methods is still a great challenge. Here, sandwich-like composite catalyst Cu2O/TiO2/Ti3C2 was prepared by an easily available solvent reduction measure for the highly efficient catalytic nitro compounds. In particular, sandwich-like composite catalyst Cu2O/TiO2/Ti3C2 exhibits excellent catalysis for 2-nitroaniline (2-NA) and 4-nitrophenol (4-NP), and its pseudo-first-order reaction rate constants (k) are 0.163 and 0.114 min–1, respectively. Interestingly, even after eight consecutive cycles of catalytic experiments, the conversion rates of catalytic 2-NA and 4-NP are still greater than 95 and 92%, respectively, demonstrating that the obtained catalyst has excellent catalytic capability and a high reutilization rate. The excellent catalytic performances of Cu2O/TiO2/Ti3C2 can be attributed to the fact that Ti3C2 provides a greater reaction site for the formation of Cu2O and reduces the aggregation during the formation of Cu2O by in situ synthesis. Therefore, ternary composite catalyst Cu2O/TiO2/Ti3C2 prepared by solvent reduction not only supplies a technical method for the catalytic reaction of MXene-based material but also lays the foundation for the development of new photocatalysts.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
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2021
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IF 4.833
Zhongying Liu,Yihai Zhou,Liangjun Yang,Renchun Yang
The preparation of high-efficiency photocatalysts by green and mild methods is very attractive for photocatalysis field. Here, TiO 2 /Ti 3 C 2 was prepared by in-situ oxidation with a green method, in which only water or H 2 O 2 was used. A heterojunction interface formed between the anatase phase TiO 2 and the Ti 3 C 2, which was demonstrated by HRTEM and XRD. Fluorescence spectra and i-t transient photocurrent are used to study the separation efficiency of photogenerated electron-hole pairs. The close contact between Ti 3 C 2 and TiO 2 speed up the separation of photo-generated electron-hole pairs, promoting a higher hydrogen production performance around 2520.4 μmol·g −1 ·h −1 on TCT-1.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Catalysts
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2022
·Vol. 12
·期 6
·599
·
IF 4.501
Yong Li,Mingqing Zhang,Yanfang Liu,Qinghua Zhao,Xin Li,Qianyu Zhou,Yuanfu Chen,Shifeng Wang
Research has demonstrated that the formation of composites of titanium dioxide (TiO2) with silver phosphate (Ag3PO4) through the construction of heterojunctions can expand its light absorption range and suppress the recombination of photogenerated electron–hole pairs, thereby improving the photocatalytic performance. However, this method offers only limited performance improvements, and the composite photocatalysts are costly due to the expensive Ag3PO4. In this study, Ti3C2MXene, which has good hydrophilicity and excellent electrical conductivity, is first used to form Schottky junction composites with bronze TiO2(TiO2(B)) via electrostatic self-assembly. Then, Ag3PO4quantum dots were further formed on the surface of the TiO2(B)/Ti3C2MXene by in situ self-growth, and Ag3PO4formed heterojunctions and Schottky junctions with TiO2(B) and Ti3C2MXene, respectively. Finally, a ternary composite photocatalyst TiO2(B)/Ti3C2MXene/Ag3PO4was jointly constructed by these functional junctions. Under the synergistic effect of these functional junctions, the mobility and fast separation performance of photogenerated electron–hole pairs of the composite photocatalyst were significantly improved, the recombination of photogenerated electron–hole pairs was effectively suppressed, and the light absorption performance was enhanced. As a result, the composite photocatalyst exhibited excellent photocatalytic performances.Keywords:ternary composite photocatalyst;heterojunction;photocatalytic degradation;bronze TiO2;Ti3C2MXene
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
高影响因子
NANOTECHNOLOGY
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2020
·Vol. 31
·期 34
·345603
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IF 3.551
Tao Ke,Shuyi Shen,Kun Yang,Daohui Lin
Constructing effective heterojunctions between semiconductors and appropriate cocatalysts and exposing highly active crystal facets have been considered an effective approach to obtain efficient photocatalysts. Herein, a novel BiOI/(001)TiO2/Ti3C2 (BTT) hybrid was for the first time synthesized by in situ growing (001)TiO2 nanosheets on a 2D MXene nanomaterial (Ti3C2) and subsequent deposition of flower-like nanoflake BiOI on the obtained (001)TiO2/Ti3C2 hybrid. The BTT hybrid exhibited excellent photocatalytic performance for degradation of Rhodamine B under visible light irradiation, with the highest degradation rate being 6.26, 1.72, and 1.35 times of that of a pure BiOI, BiOI/TiO2 hybrid, and BiOI/Ti3C2 hybrid, respectively. The staggeringly enhanced photoactivity of BTT was attributed to the separation of photogenerated carriers by a multiple charge transfer channels because of the formed p-n and Schottky double junctions. This study demonstrates that (001)TiO2/Ti3C2 obtained by simple hydrothermal oxidation of Ti3C2 can be a good cocatalyst for fabricating excellent visible-light-driven photocatalyst.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Materials Today Communications
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2022
·
IF 3.662
Wei Qiang,Xiao Qu,Chuntao Chen,Lei Zhang,Dongping Sun
As a photocatalyst , titanium dioxide (TiO 2 ) suffers from the wide band gap and the quick carrier recombination process, thus leading to the inefficient use of solar energy and poor catalytic performance. Herein, in this work, TiO 2 /Ti 3 C 2 heterojunctions are designed to overcome these shortcomings via growing TiO 2 in situ on the titanium element of Ti 3 C 2 MXene . The TiO 2 /Ti 3 C 2 heterojunctions not only broaden the range of light absorption , but also hugely extend the lifetime of photogenerated carriers. Besides, the anatase TiO 2 with exposed (001) facets further enhances the catalytic properties. After optimizing the amount of TiO 2 /Ti 3 C 2 heterojunctions by controlling reaction time, 20 mg catalysts can degrade 97.6% of 30 mL tetracycline solution (15 mg/L) in 90 min under visible light . Even after five cycles, the degradation ability of TiO 2 /Ti 3 C 2 only changes from 97.6% to 94.3%. This paper offers another perspective on the synthesis of efficient and stable photocatalysts.
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
高影响因子
NANOTECHNOLOGY
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2020
·Vol. 32
·期 1
·015706
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IF 3.551
Qiao Yin,Zhenzhen Cao,Zhiyuan Wang,Jiaming Zhai,Mingliang Li,Li Guan,Bingbing Fan,Wen Liu,Gang Shao,Hongliang Xu,Hailong Wang,Rui Zhang,Hongxia Lu
Photocatalytic degradation of pollutants has been proved to be an effective strategy for wastewater treatment. Herein, TiO2 nanoparticles were synthesized on a Ti3C2 matrix by in situ growth, forming Z-scheme TiO2@Ti3C2/Cd0.5Zn0.5S (TO/CZS) multilevel structured nanocomposites via one-step hydrothermal route. The effects of hydrothermal temperature and Cd0.5Zn0.5S content on microstructure and properties of composites were assessed. TO/CZS nanocomposites were probed into phase composition, morphological and optical properties with x-ray diffractometer, infrared radiation, scanning electron microscope and UV–vis reflective spectra. Following the hydrothermal reaction at 160 °C for 12 h, TiO2 nanoparticles of 30 nm in diameter were generated in situ on Ti3C2 lamina and Cd0.5Zn0.5S particles were evenly distributed on the Ti3C2 matrix. The photocatalytic activity of TO/CZS composites were evaluated, which found that degradation rate constant (k = 0.028 min−1) of TO/CZS-40 on Rhodamine B was 5.19 times that of pure TiO2 and 4.48 times that of Cd0.5Zn0.5S. Through anchoring Ti3C2 as an electron transition mediator and combination with TiO2 and Cd0.5Zn0.5S, the new Z-scheme between TiO2 oxidized by Ti3C2 and Cd0.5Zn0.5S establishes a multilevel structure of separating electron-hole pairs. This work demonstrates a valid way to control electrons and hole transfer directions efficiently through designing multilevel semiconductor structural designs.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Electronic Materials Letters
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2022
·Vol. 19
·期 1
·94-107
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IF 3.151
Luo Menghao,Feng Hange,Hu Yuechuan,Chen Keke,Dong Zibo,Xue Shaolin
Abstract Photocatalytic degradation has received considerable emphasis since it shows significant possibilities in environmental pollution. In this work, ternary Z-scheme heterojunction g-C 3 N 4 /TiO 2 /Ti 3 C 2 photocatalysts are designed and fabricated. The Z-scheme heterojunctions formed on the surfaces of g-C 3 N 4 and TiO 2 dramatically modify the photocatalytic performances of the compound under illumination. Meanwhile, in this process, multilayer Ti 3 C 2 , as the transport medium of Z-scheme heterojunction, is tightly bonded to TiO 2 generated by hydrothermal oxidation and g-C 3 N 4 with large specific surface area, which effectively facilitates the space charge separation and depresses the charge recombination. When the addition amount of TiO 2 /Ti 3 C 2 is 80 mg and calcined at 450 ℃ for 4 h, g-C 3 N 4 /TiO 2 /Ti 3 C 2 has the greatest photocatalytic performance, and the kinetic constant for degradation methyl orange (MO) was about 3.62 times that of g-C 3 N 4 and 14.55 times that of Ti 3 C 2 , respectively. This work illustrates that g-C 3 N 4 /TiO 2 /Ti 3 C 2 has outstanding potential and offers novel insights for designing and synthesizing new ternary heterojunction materials. Graphical Abstract
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ChemPhotoChem
·
2025
·
IF 3
Yuan Bai,Jie Liu,Weiting Huang,Xintong Shen,Haoyu Zheng,Kexin Hu
Graphical Under visible light, a Z-type heterojunction is formed between Ti 3 C 2 /TiO 2 and g-C 3 N 5 to enhance charge separation. Electrons and holes directly or indirectly react with PMS to generate free radicals such as · ,·OH, and 1 O 2 to degrade tetracycline. Photocatalysis-assisted peroxymonosulfate (PMS) activation is a promising technology for the degradation of antibiotics in water remediation. Herein, MXene-derived oxide (TiO 2 ) and g-C 3 N 5 Z-scheme ternary heterojunction photocatalytic composite materials are synthesized using an electrostatic self-assembly approach and characterized. The optimized g-C 3 N 5 /TiO 2 /Ti 3 C 2 (CNTT) heterostructure demonstrates exceptional photocatalytic activity for tetracycline (TC) removal, achieving 90% degradation within 60 min at an optimal g-C 3 N 5 :TiO 2 /Ti 3 C 2 mass ratio of 3:2. Remarkably, the system exhibits broad pH adaptability (80.8–96.3% TC removal across pH 2–12), overcoming the pH sensitivity limitations of traditional PMS-based processes. Mechanistic investigations reveal a synergistic photocatalysis-PMS activation pathway, with quenching experiments confirming , ·OH, · , and 1 O 2 , as dominant reactive species. The CNTT composite maintains 65.2% degradation efficiency after five cycles, demonstrating robust stability. Coexisting ions negatively influence TC removal in the order: H 2 PO 4 − > > Cl − > > . This work establishes the CNTT heterostructure as a promising, environmentally tolerant candidate for efficient pharmaceutical pollutant remediation in complex aqueous matrices.
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产品关联
DOI
高影响因子
Environmental Technology & Innovation
·
2020
·
IF 3.356
Vu Thi Quyen,Le Thi Thu Ha,Dang My Thanh,Quyet Van Le,Nguyen Minh Viet,Nguyen Thi Nham,Phan Quang Thang
Advanced synthesis of nanoflower structures consisting of TiO 2 @Ti 3 C 2 nanoflowers with three-dimensional (3D) porous frameworks from two-dimensional (2D) Ti 3 C 2 MXene was done and applied for degradation of organic pollutant. The special structure of material was created by the in situ transformation, starting from Ti 3 C 2 T x MXene as provision of Ti source. The basis properties of material were characterized by SEM, TEM , XRD and XPS. The Ti 3 C 2 T x MXene showed layered structure and then this morphology was replaced by nanoflower spheres with rapid growth of TiO 2 @Ti 3 C 2 nanowhiskers. In terms of application, the TiO 2 @Ti 3 C 2 heterojunction showed an extraordinary photocatalytic efficiency toward Rhodamine B (RhB) compared to performances of pristine Ti 3 C 2 , and commercial TiO 2 . In addition, the TiO 2 @Ti 3 C 2 composite also displays the good recyclability even after 5th degradation cycles. Based on the finding, it gains a deeper insight into practical applications of 2D transition metal carbide for treatment of organic pollutants in wastewater.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2020
·Vol. 23
·期 3
·1382-1388
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IF 9.48
Liang Chen,Yiming Huang,Ren Zou,Jiliang Ma,Yunyi Yang,Tingzhen Li,Mingsai Li,Qi Hao,Haibo Xie,Xinwen Peng
Synthesis of D-xylonic acid, a high value chemical feedstock, from biomass chemicals through a photocatalytic process is of great significance in respect of economical and sustainable concerns, and therefore has aroused considerable attention. Herein, a TiO2/Ti3C2(TT) photocatalyst was designed for the oxidation of xylose to D-xylonic acid under ambient conditions. The photocatalyst is fabricated by in situ growth of TiO2 nano-particles on Ti3C2 nanosheets and exhibits 64.2% of D-xylonic acid yield with excellent stability. The mechanistic study indicates that the electron transfer from TiO2 to Ti3C2 significantly increases the life time of light-induced charge carriers, and hence improved photocatalytic performance.
研究领域:
材料科学
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化学工程
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可持续化学
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光催化
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Qian Zhong,Jin Liu,Gaoke Zhang
Visible-light photocatalytic activation of peroxymonosulfate (PMS) is a promising strategy for treating refractory organic pollutants. In this study, a novel nitrogen-doped TiO 2 /Ti 3 C 2 MXene composite (N-TiO 2 /Ti 3 C 2 ) was synthesized via an impregnation-calcination method using cetyltrimethylammonium bromide (CTAB) as the nitrogen source. N-doping effectively narrowed the bandgap of TiO 2 , while the highly conductive Ti 3 C 2 MXene served as an electron-transfer platform, thereby synergistically enhancing light absorption and charge carrier separation. The N-TiO 2 /Ti 3 C 2 exhibited a Brunauer-Emmett-Teller surface area of 35.86 m 2 /g, approximately 1.94 times higher than that of the undoped TiO 2 /Ti 3 C 2 , due to CTAB intercalation-induced structural regulation. Under LED visible light, the N-TiO 2 /Ti 3 C 2 /PMS system achieved 98.5% of rhodamine B degradation within 100 min and 81.3% of tetracycline degradation within 40 min, with good stability over a wide pH range (3.1-10.0). Mechanistic studies identified that sulfate radicals (SO 4 • − ), singlet oxygen ( 1 O 2 ), and holes (h⁺) were the dominant reactive species. LC-MS analysis elucidated the degradation pathways of rhodamine B and tetracycline. This study presents an efficient MXene-based photocatalyst for PMS activation, offering a promising strategy for wastewater treatment.
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DOI
高影响因子
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