JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2023
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IF 4.3
Longzhu Li,Tian Fang,Anqi Huang,Changhai Liu,Lulu Fu,Yuwei Chen,Yujie Ding,Naotoshi Mitsuzaki,Zhidong Chen
Since the photoelectrochemical properties of hematite are affected by its bulk and surface charge recombination, the introduction of a conductive substrate is a feasible way to improve its properties. In this paper, the Ti 3 C 2 and TiO 2 /Ti 3 C 2 conductive substrates were prepared by electrophoretic depositing multilayered Ti 3 C 2 and TiO 2 /Ti 3 C 2 nanosheet powders onto F-doped SnO 2 glass (FTO), respectively. Then, the TiO 2 /Ti 3 C 2 -hematite and Ti 3 C 2 -hematite photoanodes were obtained by in-situ growth of hematite on Ti 3 C 2 and TiO 2 /Ti 3 C 2 conductive substrates by hydrothermal method. The photoanodes were characterized by scanning electron microscopy (SEM), UV–vis spectroscopy, X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS) and photoelectrical measurements. The photocurrent density of TiO 2 /Ti 3 C 2 -hematite reaches 1.29 mA cm −2 at 1.23 V (vs. RHE), which is 3.7 times than that of the FTO-hematite as 0.35 mA cm −2 . The enhancement of the photocurrent response of TiO 2 /Ti 3 C 2 -hematite is mainly due to the great improvement of the bulk charge separation efficiency and the surface charge injection efficiency. This is attributed to the fact that the layered TiO 2 /Ti 3 C 2 conductive substrate can improve the interface property of FTO/hematite, provide Ti source and a larger specific surface area for the growth of hematite.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Yujin Zhang,Kailing Zhou,Chunyu Yuan,Huijun Lv,Hongfei Yin,Qian Fei,Dongdong Xiao,Yongzheng Zhang,Woonming Lau
Surface and interface engineering of composite photocatalysts are effective ways to enhance the dynamics of photo-generated charge carriers. In this work, SrTiO 3 /Ti 3 C 2 MXene (STO/TC) Schottky heterojunction is constructed by in-situ growth of SrTiO 3 (STO) on Ti 3 C 2 MXene (TC) through Sr(OH) 2 etching the surfaces of TC. This in-situ growth strategy not only creates the tight chemically bonded interfaces by SrTiO 3 nanoparticles uniformly anchoring on the surface of two-dimensional Ti 3 C 2 MXene nanosheets for promoting the photo-generated charge carrier separation, but also introduces surface Ti vacancies as the efficient catalytic active sites to accelerate the charge carrier transfer process for efficient hydrogen production. The photocatalytic system constructed by interface and surface engineering optimizes the photo-generated charge carrier dynamics and refines the photocatalytic hydrogen evolution performance (6.8 times higher than pristine SrTiO 3 ) and stability. This work is expected to provide an alternative strategy to construct highly efficient photocatalysts with hydrogen evolution.
研究领域:
材料科学
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能源科学
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界面工程
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DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
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2021
·Vol. 39
·期 8
·2141-2146
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IF 6
Chuqiao Hu,La Li,Guozhen Shen
Main observation and conclusion Ti 3 C 2 MXene serving as superior electrical conductors presents more specific performance such as transparency, conductivity than gold (Au), and even could form a heterostructure with active materials of the functional devices. Here, a Ti 3 C 2 MXene-Te microplate van der Waals heterostructure based transparent near-infrared photodetector (PD) is exploited. Compared with Au-Te PD, the on-off ratio of the Ti 3 C 2 -Te PD is improved by seven orders of magnitude and reaches 9.51 × 10 7 under 1064 nm laser illuminations. Benefiting from the utilization of flexible PET substrate and Ti 3 C 2 conductors in manufacturing PD devices, the Ti 3 C 2 -Te PD exhibits excellent flexibility with no noticeable response change after being bent for different states and times. Moreover, 63% transmittance of the fabricated PD devices over the 500—1000 nm wavelength range is obtained. All the above results demonstrate the tremendous potential in wearable optoelectronics.
研究领域:
材料科学
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光电子学
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纳米技术
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2024
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IF 6.5
Xiaomeng Li,Shuxue Zhou
Utilization of Ti 3 C 2 nanosheets for enhancing anticorrosion of epoxy resin coatings has been reported. But the epoxy coatings in real world are mainly pigmented coatings. Unfortunately, the anticorrosion behavior of Ti 3 C 2 nanosheets for the pigmented epoxy coatings is rarely concerned. In this work, both 0.5 wt% unmodified Ti 3 C 2 nanosheets (U-Ti 3 C 2 ) or 0.5 wt% (3-glycidyloxypropyl)trimethoxysilane-modified Ti 3 C 2 nanosheets (G-Ti 3 C 2 ) were introduced into solvent-based titania pigmented epoxy coatings. Corrosion resistance of coatings was evaluated by electrochemical impedance spectroscopy and salt spray tests. A titania concentration effect was interestingly exhibited for the anticorrosion behavior Ti 3 C 2 -containing pigmented coatings. Enhanced anticorrosion was only demonstrated when TiO 2 content was not above 10 wt% for U-Ti 3 C 2 or 5 wt% for G-Ti 3 C 2 . Moreover, the pigmented coatings with U-Ti 3 C 2 have better corrosion resistance than those with G-Ti 3 C 2 , being contrary to the phenomenon observed in pure epoxy resin coatings. The different anticorrosion behavior of Ti 3 C 2 nanosheets for epoxy coatings with various TiO 2 contents was mainly attributed to the different dispersion states of TiO 2 pigments, that is, improved dispersion at low TiO 2 content and deteriorated dispersion at high TiO 2 content, after addition of Ti 3 C 2 nanosheets.
研究领域:
材料科学
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腐蚀与防护
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DOI
高影响因子
ACS Applied Nano Materials
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2022
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IF 6.14
Luyao Wang,Zhe Bai,Xiangwen Zhang,Guozhu Li
Hydrodesulfurization (HDS) is an important technique that is widely adopted in the petroleum industry to remove harmful sulfur compounds for environmental protection. MoS2 is the most commonly employed HDS catalyst but tends to stack due to its high surface energy. Active MoS2 nanosheets are anticipated to be well supported for preventing aggregation and increasing accessibility. In the current study, two-dimensional Ti3C2 MXene is utilized as a novel support to controllably anchor MoS2 nanosheets for efficient HDS. The composite of Ti3C2-supported CoMoS2 (CoMoS2/Ti3C2) with a 3D interconnected network was successfully constructed by a facile, one-step hydrothermal method. Detailed characterizations showed that MoS2 nanosheets vertically grew in situ on and between the layers of Ti3C2 MXene. CoMoS2/Ti3C2 possesses a well-defined open structure with a larger specific surface area and a higher proportion of CoMoS active phase compared with unsupported CoMoS2. As catalyzed by CoMoS2/Ti3C2, the reaction rate constant was effectively increased to 2.8 times that on CoMoS2 for the HDS of dibenzothiophene. CoMoS2/Ti3C2 also showed good stability in a harsh high-temperature reaction environment.
研究领域:
材料科学
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催化化学
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能源化工
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DOI
高影响因子
Catalysis Science & Technology
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2021
·Vol. 11
·期 14
·4953-4961
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IF 6.119
Junyue Li,Ziyi Wang,Huayu Chen,Qiqi Zhang,Huilin Hu,Lequan Liu,Jinhua Ye,Defa Wang
Photocatalytic reduction of carbon dioxide (CO2) into hydrocarbon fuels has attracted increasing research attention in recent years. However, the fast recombination of photoinduced charge carriers and poor adsorption/activation capability of CO2 molecules limit the photoconversion efficiency. Herein, we report on loading a two-dimensional (2D) titanium carbide (Ti3C2) MXene as a noble-metal-free cocatalyst onto zinc oxide (ZnO) via a facile electrostatic self-assembly method for efficient CO2 photoreduction. It is interesting to find that the ZnO loaded with 7.5 wt% of surface-alkalinized Ti3C2 exhibited remarkably improved evolution rates of CO (30.30 μmol g−1 h−1) and CH4 (20.33 μmol g−1 h−1), which were approximately 7-fold and 35-fold those of bare ZnO, respectively. The surface-alkalinized Ti3C2 MXene is believed to play a crucial role in improving the separation/transfer of photoinduced charge carriers and the adsorption/activation of CO2 molecules, accounting for the superior photocatalytic activity of CO2 reduction. Our work demonstrates that the Ti3C2 MXene could be employed as a noble-metal-free cocatalyst for efficient photocatalytic CO2 reduction.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2020
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IF 2.726
Qing Xi,Xiuping Yue,Junqiang Feng,Jianxin Liu,Xiaochao Zhang,Changming Zhang,Yawen Wang,Yunfang Wang,Zhiping Lv,Rui Li,Caimei Fan
Photocatalytic hydrogen evolution via water splitting was considered as a promising way of solar energy conversion and storage in the past decades. However, the weak visible-light response and fast recombination of electron-hole pairs are still main obstacles to overcome. Herein, a novel 2D/2D Bi 4 O 5 Br 2 /TL-Ti 3 C 2 (Thin layer-Ti 3 C 2 ) visible-light photocatalyst was successfully prepared by in-situ synthesis of Bi 4 O 5 Br 2 nanosheets on the surface of TL-Ti 3 C 2 at room temperature . The resulting Bi 4 O 5 Br 2 /TL-Ti 3 C 2 exhibits a higher hydrogen evolution activity (83.5 μmol·g −1 ·h −1 ) than that of pristine Bi 4 O 5 Br 2 (44.9 μmol·g −1 ·h −1 ) under visible-light irradiation. The enhanced hydrogen evolution activity of as-prepared photocatalyst mainly attributes to the increased visible light responsiveness and rapid transfer of photo-induced electrons. The strong interaction between TL-Ti 3 C 2 and Bi 3+ in Bi 4 O 5 Br 2 nanosheets establishes a good electron transfer channel and close contact, which accelerates the transfer of photo-induced electrons from Bi 4 O 5 Br 2 to Ti 3 C 2 and promotes the separation of photo-generated charge carriers, thereby increasing the number of effective photo-induced electrons involved in the hydrogen evolution. This work provides a new insight into the construction of Bi x O y Br z /MXene photocatalyst system, and demonstrated that Ti 3 C 2 has excellent application potential in promoting the photocatalytic performance of bismuth-rich bismuth oxyhalides (Bi x O y X z X = Cl, Br, I).
研究领域:
材料科学
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能源化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Yunmeng Cao,Lin Yue,Zaixing Li,Yonghui Han,Jing Lian,Huiping Qin,Shuyan He
In this study, Sn–Bi–MOF/Ti 3 C 2 heterojunction catalysts were prepared using the solvothermal method, and their photocatalytic ability to degrade and mineralize tetracycline (TC) under illumination was investigated. After 90 min of photocatalysis, the pollutant had a degradation efficiency of 96.2% and a mineralization rate of 45.5%. The physicochemical properties of the catalysts were analyzed using various methods. The effects of the solution pH, coexisting anions, and water quality on the catalyst performance were investigated. ·O 2 − and h + are the main active substances in the photocatalytic mechanism, as demonstrated by free-radical quenching experiments and EPR tests. The degradation of TC and the intermediates produced were determined using 3D fluorescence and LC-MS. The photocatalytic mechanism of Sn–Bi–MOF/Ti 3 C 2 was proposed based on free radical determination and electrochemical tests. The formation of the Schottky junction accelerated the transfer of electrons to Ti 3 C 2 and improved the separation of charges, which led to the generation of free radicals. Sn–Bi–MOF/Ti 3 C 2 still exhibited good catalytic ability after four cycles of the experiments, and the XRD patterns before and after the reaction were consistent, which illustrates that the composite structure was stable. Overall, Sn–Bi–MOF/Ti 3 C 2 has promising applications in the photocatalytic removal of refractory pollutants.
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
Small
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2024
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IF 13
Qiaona Liu,Xin Han,An Qian,Jiayu Qian,Xin Pu,Lei Ye,Jinshan Zhan,Jian Zhang,Qiang Yang,Jichang Liu
Building heterojunctions and exposing more catalytic active sites are effective strategies to enhance the photocatalytic hydrogen evolution activity. Herein, TiO 2 nanosheets are oxidized in situ on Ru-loaded MXene as carriers and subsequently loaded with uniform 2D CdS via hydrothermal method to obtain 2D Ru/Ti 3 C 2 -TiO 2 /CdS composite photocatalysts that integrate heterojunctions and cocatalysts. The formation of heterojunction between CdS and TiO 2 is conducive to promoting the separation and transfer of photogenerated charges, simultaneously, Ru/Ti 3 C 2 with the fully exposed Ru and Ti 3 C 2 can act as effective active sites of photocatalytic hydrogen production reaction. The composite photocatalyst exhibits an improved hydrogen production rate with 5479 µmol g −1 h −1 , which is 5, 3, and four times more than that of pristine CdS, CdS loaded Ti 3 C 2 -TiO 2 and CdS loaded Ru-TiO 2 respectively. The results reveal that the notable enhancement in performance can primarily be ascribed to the introduction of the TiO 2 /CdS heterojunction and the efficient cocatalysts of Ru/Ti 3 C 2 . Moreover, the 2D Ti 3 C 2 with high conductivity as carriers can increase charge transfer, and its 2D structure can serve as a template for growing 2D photocatalysts with higher activity. The interface engineering with multiple interfaces can offer novel insights for the advancement of efficient hydrogen evolution reaction catalysts.
研究领域:
材料科学
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能源化学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
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2019
·Vol. 7
·期 10
·5635-5642
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IF 10.733
Lin Yang,Yohan Dall'Agnese,Kanit Hantanasirisakul,Christopher E. Shuck,Kathleen Maleski,Mohamed Alhabeb,Gang Chen,Yu Gao,Yoshitaka Sanehira,Ajay Kumar Jena,Liang Shen,Chunxiang Dall'Agnese,Xiao-Feng Wang,Yury Gogotsi,Tsutomu Miyasaka
MXenes, a class of two-dimensional (2D) transition metal carbides and nitrides, have a wide range of potential applications due to their unique electronic, optical, plasmonic, and other properties. Herein, we explore the use of the Ti3C2 MXene in organic–inorganic lead halide perovskite solar cells (PSCs). SnO2–Ti3C2 MXene nanocomposites with different contents of Ti3C2 (0, 0.5, 1.0, 2.0, and 2.5 wt‰) were used as electron transport layers (ETLs) in low-temperature processed planar-structured PSCs. Mixing SnO2 with 1.0 wt‰ Ti3C2 effectively increases the power conversion efficiency (PCE) from 17.23% to 18.34%, whereas the device prepared with pristine Ti3C2 as the ETL achieves a PCE of 5.28%. Photoluminescence and electrochemical impedance spectroscopy results reveal that metallic Ti3C2 MXene nanosheets provide superior charge transfer paths, enhancing electron extraction, electron mobility, and decreasing the electron transfer resistance at the ETL/perovskite interface, and thus leading to higher photocurrents. This work proposes a new field of application for MXenes and a promising method to increase the efficiency of solar cells.
研究领域:
材料科学
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能源技术
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Zhipeng Mao,Wei Hao,Wei Wang,Fubin Ma,Chengcheng Ma,Shougang Chen
As an influential antifouling material, photocatalytic materials have drawn attention increasingly over recent years owing to their potential bacteriostatic property in the domain of marine antifouling. Herein, a flower-like BiOI@CeO 2 @Ti 3 C 2 S-scheme photocatalyst was contrived and prepared by hydrothermal method . The innovative combination of Ti 3 C 2 and narrow band gap semiconductor BiOI was implemented to modify CeO 2 and the photocatalytic bacteriostatic mechanism of BiOI@CeO 2 @Ti 3 C 2 was elucidated. Schottky junction was formed between CeO 2 and Ti 3 C 2 , and a p-n junction was formed between CeO 2 and BiOI. By photoelectrochemical characterization, BCT-10 exhibits the best photoelectrochemical performance of which photogenerated carrier transport can be performed more readily at 10 % CeO 2 @Ti 3 C 2 addition. 99.76 % and 99.89 % of photocatalytic bacteriostatic efficiency of BCT-10 against Escherichia coli and Staphylococcus aureus were implemented respectively, which were 2.98 and 3.07 times higher than that of pure CeO 2 . The ternary heterojunction can suppress photogenerated electron-hole complexes more effectively and enhance the photocatalytic bacteriostatic effect of CeO 2 , which also provided a new concept to the further broadened application of CeO 2 in the marine bacteriostatic and antifouling field.
研究领域:
材料科学
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环境科学
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微生物学
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DOI
PubMed
高影响因子
Cancer Nanotechnology
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2023
·Vol. 14
·期 1
·1-16
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IF 5.7
Bai Zhiqiang,Zhao Lu,Feng Haidi,Xin Zhihui,Wang Chaoyu,Liu Zhixiong,Tian Maozhong,Zhang Haifei,Bai Yunfeng,Feng Feng
Background Ti 3 C 2 is a type of transition metal carbides and nitrides (MXenes) with high light-to-heat conversion efficiency property, which has been widely used in cancer treatment recently. In fact, active targeting delivery of MXenes nanomaterials with targeting molecule could enhance the therapeutic efficacy. However, targeted therapy of MXenes has not been further studied in the past. Aptamers (Apt) with excellent affinity and high specificity properties have been widely used as targeting tools. Predictably, the incorporation of Apt into Ti 3 C 2 nanomaterials will offer an unprecedented opportunity in the research fields of cancer targeted therapy. Results Transmembrane glycoprotein mucin 1 (MUC1) is overexpressed on the surface of MCF-7 cells, and MUC1 Apt (Apt-M) could target MCF-7 cells with high affinity and specificity. Here, a smart targeting nanotherapeutic system Ti 3 C 2 /Apt-M was fabricated, which could specifically recognize and enter in MCF-7 cells. Benefitting from the desirable targeted performance of Apt-M, MCF-7 cells completed the ingestion process of Ti 3 C 2 /Apt-Mf nanosheets within 4 h, and Apt-M facilitated the entry of the Ti 3 C 2 /Apt-Mf nanosheets into MCF-7 cells. Besides, Ti 3 C 2 /Apt-M nanosheets exhibited the potential as an outstanding photothermal agent (PTA) because of the photothermal performance inherited from wrapped Ti 3 C 2 nanosheets. As demonstrated, upon 808 nm laser irradiation, the Ti 3 C 2 /Apt-M nanotherapeutic system displayed a satisfactory antitumor effect by targeted photothermal therapy both in vitro and in vivo. Conclusion This study provides a new idea for the development of MXenes nanotherapeutic system with high active targeting performance. Graphical Abstract
研究领域:
纳米技术
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癌症治疗
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材料科学
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生物医学工程
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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）