INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Peng Liu,Yahao Zhao,Wen Liu,Furong Ye,Hui Lv,Zhuo Peng,Changcun Han,Xinguo Ma,Jiayi Tian,Difu Zhan,Qian Fu,Yizhong Huang
Solar photocatalytic hydrogen production shows promise in addressing global energy and environmental concerns. The limited efficiency of photocatalysts is mainly due to ineffective separation and transfer of photogenerated charges. To improve this, we enhance the TiO 2 –Ti 3 C 2 heterojunction by in-situ oxidation through interfacial engineering , resulting in a more compact composition . Subsequently, we anchor single-atom Pt at the TiO 2 –Ti 3 C 2 interface through photo-Ti 3 C 2 reduction. The in-situ growth of TiO 2 on Ti 3 C 2 introduces an interfacial driving force for carrier separation and provides a channel for electron transfer from TiO 2 to Ti 3 C 2 . This further facilitates transfer onto Pt, shortening the migration distance and enhancing the photocatalytic efficiency. The best Pt/TiO 2 –Ti 3 C 2 composite demonstrates an impressive hydrogen precipitation efficiency of 767 μmol g −1 h −1 , surpassing TiO 2 and Pt/TiO 2 by factors of 12 times and 1.46 times, respectively. Furthermore, we developed a higher efficiency photocatalyst using the molten salt method to avoid the risks associated with conventional hydrofluoric acid etching. This research opens up new possibilities for the preparation of MXenes interface-modified catalysts, offering a valuable avenue for future exploration in the field.
研究领域:
材料科学
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能源与环境科学
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DOI
高影响因子
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
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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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
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催化化学
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DOI
高影响因子
MATERIALS LETTERS
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2015
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IF 2.489
Yupeng Gao,Libo Wang,Aiguo Zhou,Zhengyang Li,Jingkuo Chen,Hari Bala,Qianku Hu,Xinxin Cao
TiO 2 /Ti 3 C 2 nanocomposites with high photocatalytic activity were successfully fabricated via a hydrothermal process. The microstructure and phase composition of these composites were characterized by field emission scanning electron microscope (FESEM) and X-ray diffraction (XRD). The photocatalytic performance of pure TiO 2 and TiO 2 /Ti 3 C 2 nanocomposites were evaluated by photodegradation of methyl orange (MO) under ultraviolet light irradiation. Photodegradation tests results revealed that TiO 2 /Ti 3 C 2 have much better photocatalytic activity than pure TiO 2 nanomaterials . And it was suggested that the TiO 2 /Ti 3 C 2 exhibited more effective electron–hole separation than pure TiO 2 and Ti 3 C 2 under UV light irradiation.
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
Advanced Science
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2022
·Vol. 10
·期 2
·2204041
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IF 17.521
Ningning Liu,Lanlan Yu,Baojun Liu,Fei Yu,Liqing Li,Yi Xiao,Jinhu Yang,Jie Ma
Constructing faradaic electrode with superior desalination performance is important for expanding the applications of capacitive deionization (CDI). Herein, a simple one-step alkalized treatment for in situ synthesis of 1D TiO 2 nanowires on the surface of 2D Ti 3 C 2 nanosheets, forming a Ti 3 C 2 -MXene partially derived hierarchical 1D/2D TiO 2 /Ti 3 C 2 heterostructure as the cathode electrode is reported. Cross-linked TiO 2 nanowires on the surface help avoid layer stacking while acting as the protective layer against contact of internal Ti 3 C 2 with dissolved oxygen in water. The inner Ti 3 C 2 MXene nanosheets cross over the TiO 2 nanowires can provide abundant active adsorption sites and short ion/electron diffusion pathways. . Density functional theory calculations demonstrated that Ti 3 C 2 can consecutively inject electrons into TiO 2 , indicating the high electrochemical activity of the TiO 2 /Ti 3 C 2 . Benefiting from the 1D/2D hierarchical structure and synergistic effect of TiO 2 and Ti 3 C 2 , TiO 2 /Ti 3 C 2 heterostructure presents a favorable hybrid CDI performance, with a superior desalination capacity (75.62 mg g −1 ), fast salt adsorption rate (1.3 mg g −1 min −1 ), and satisfactory cycling stability, which is better than that of most published MXene-based electrodes. This study provides a feasible partial derivative strategy for construction of a hierarchical 1D/2D heterostructure to overcome the restrictions of 2D MXene nanosheets in CDI.
研究领域:
材料科学
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环境工程
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DOI
PubMed
高影响因子
Frontiers of Environmental Science & Engineering
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2024
·Vol. 18
·期 10
·1-14
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IF 6.1
Zhao Taisheng,Liu Xiaoman,Huai Lankun,Feng Rui,Yan Tao,Xu Weiying,Zhao Yanxia
Photocatalytic membranes offer an effective strategy to overcome the difficulties of solid-liquid separation and secondary contamination of powdered photocatalysts. MXene is a 2D material of layered Ti 3 C 2 , which is considered to limit electron-hole separation and contribute to photocatalysis. In this work, the etched Ti 3 C 2 MXene was loaded on the surface of ceramic membranes using polydopamine (PDA) as a binder, followed by one-step calcination to produce TiO 2 nanoparticles (NPs) in situ. The characterizations supported that the TiO 2 /Ti 3 C 2 ceramic membranes had high mechanical strength while retaining the layered structure of Ti 3 C 2 , which was conducive to the inhibition of electron and hole complexation, improving the photocatalytic performance. Degradation experiments revealed that the material showed enhanced degradation of pharmaceuticals and personal care products (PPCPs) such as ciprofloxacin (CIP), tetracycline (TCN) and ibuprofen (IBP). The LC-MS and toxicity prediction models indicated that the developmental toxicity of CIP degradation products decreased with prolonged photocatalytic reaction, exhibiting no acute toxicity to fish. The MT650 exhibited significantly enhanced water flux properties (320 L/(m 2 ·h)). The TiO 2 /Ti 3 C 2 ceramic membranes explored in this work are expected to target the treatment of PPCPs with excellent engineering promise.
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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DOI
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Lei Ding,Lin Wang,Shuai Chu,Wei Zhai,Jie Li,Xiaoru Li,Zhengbo Jiao
Environmental issues, such as increasingly polluted water resources and energy shortages, have led to the need for new strategies to promote sustainable progress and enhance human well-being. Photocatalysis is widely recognized as a promising technology for environmental sustainability. MXene is a two-dimensional nanotransition metal material, which has attracted extensive attention in the field of photocatalysis. In MXenes, titanium carbide (Ti3C2) has been extensively studied for its application in photocatalysis due to its unique nanolayered structure. The Ti site on the surface of Ti3C2 has a stronger redox activity than traditional C materials, and Ti3C2 has high electrical conductivity. The focus of this study is to obtain the Ti3C2/TiO2 composite by in situ calcination of Ti3C2 and then combine Mo,W:BVO with TiO2 to form feasible heterojunctions. The excellent electrical conductivity of Ti3C2 promotes the transfer of electrons and holes between Mo,W:BVO and TiO2, thus establishing a cascade that minimizes charge carrier recombination and exhibits strong photocatalytic activity. Through a series of photocatalytic tests, the optimum calcination temperature and time of Ti3C2 (550 °C, 2.5 h) and the doping amount of Ti3C2 (2 mg/mL) were determined. Under these conditions, a high current density of 3.8 mA cm–2 was obtained, showing excellent photostability. This study confirmed the strong photocatalytic activity of the synthesized nanoscale composites Mo,W:BVO/TiO2/Ti3C2, providing valuable insights for the design of efficient and sustainable photocatalysts in the future.
研究领域:
材料科学
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环境科学
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纳米技术
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DOI
高影响因子
International Journal of Nanomedicine
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2024
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IF 6.6
Zhenlei Wang,Zengci Run,Huamin Wang,Xiaojun He,Jian Li
Purpose The search for effective and low-risk treatment methods for colorectal cancer (CRC) is a pressing concern, given the inherent risks and adverse reactions associated with traditional therapies. Photothermal therapy (PTT) has emerged as a promising approach for cancer treatment, offering advantages such as non-radiation, non-invasiveness, and targeted treatment. Consequently, the development of nanoparticles with high stability, biocompatibility, and photothermal effects has become a significant research focus within the field of PTT.Methods In this study, TiO2-Ti3C2 nanocomposites were synthesized and characterized, and their photothermal conversion efficiency in the near-infrared region II (NIR-II) was determined. Then studied the in vivo and in vitro photothermal activity and anti-tumor effect of TiO2-Ti3C2 in human colorectal cancer cell lines and nude mice subcutaneous tumor model.Results The results showed that TiO2-Ti3C2 nanocomposites have strong absorption ability in the NIR-II, and have high photothermal conversion efficiency under 1064 nm (0.5 W/cm2, 6 min) laser stimulation. In addition, in vitro experiments showed that TiO2-Ti3C2 nanocomposites significantly inhibited the invasion, migration, and proliferation of colorectal cancer cells, and induced cell apoptosis; in vivo, experiments showed that TiO2-Ti3C2 nanocomposites-mediated PTT had good biocompatibility and efficient targeted inhibition of tumor growth.Conclusion In conclusion, TiO2-Ti3C2 nanocomposites can be used as NIR-II absorption materials in PTT to suppress the invasion, migration, and proliferation of colorectal cancer cells, induce colorectal cancer cell apoptosis, and thus inhibit the development of CRC. Therefore, TiO2-Ti3C2 nanocomposites can be used as potential anti-tumor drugs for photothermal ablation of colorectal cancer cells.
研究领域:
纳米技术
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癌症研究
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生物医学工程
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材料科学
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光热疗法
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DOI
PubMed
高影响因子
ChemistrySelect
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2023
·Vol. 8
·期 48
·e202303437
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IF 2.1
Ms. Menghan Li,Xuan Luo,Tongming Su,Xinling Xie,Hongbing Ji,Zuzeng Qin
Graphical Preparation of NiZr/N-doped TiO 2 /Ti 3 C 2 catalyst for catalytic cinnamaldehyde (CAL) hydrogenation by KBH 4 reduction. N-doped TiO 2 on Ti 3 C 2 , and N-doping substituted O in the TiO 2 lattice to create oxygen vacancies on the surface, increase the surface acidity, and adsorb C=O bonds, which resulted in high cinnamaldehyde conversion and cinnamyl alcohol (COL) selectivity after reaction 8 h. An NiZr/N-doped TiO 2 /Ti 3 C 2 catalyst was prepared by KBH 4 reduction for cinnamaldehyde hydrogenation. Characterization results showed that the synthesis of N-doped TiO 2 on Ti 3 C 2 and the uniform dispersion of TiO 2 on the Ti 3 C 2 surface increased the specific surface area of NiZr/Ti 3 C 2 by 164.4 m 2 /g. N-doping at a level of 19.03 % was used to replace O in the TiO 2 lattice; the Ti−O−Ti peak in the XPS spectrum of the undoped catalyst was shifted by 0.3 eV in the spectrum of the doped catalyst; as a result, there was a 15.40 % increase in the number of surface oxygen vacancies of the NiZr/Ti 3 C 2 catalyst. The synthesis of N-doped TiO 2 on Ti 3 C 2 converted the moderately acidic sites of NiZr/Ti 3 C 2 to strong Lewis acid sites and increased the total number of acid sites by approximately 0.8-fold. The active Lewis acid sites on the surface of NiZr/N-doped TiO 2 /Ti 3 C 2 adsorbed only C=O bonds and inhibited the adsorption of C=C bonds, resulting in a high cinnamaldehyde conversion of 90.69 % and a cinnamyl alcohol selectivity of 91.87 %.
研究领域:
催化
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化学工程
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材料科学
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DOI
高影响因子
OPTICAL MATERIALS
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2024
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IF 3.8
Xiaoyun Ye,Hangyu Zhong,Long Chen,Yumei Zhang,Yuping Wu,Wei Tian,Li-An Ma,Qianting Wang
Reasonable interface design is a key factor to improve the activity of photocatalysts. In this paper, TiO 2 /Ti 3 C 2 composite photocatalyst with high activity of anatase/rutile mixed crystal were prepared by solid-phase milling-roasting method. The microstructure of the mixed-phase TiO 2 /Ti 3 C 2 composites could be adjusted by the calcination temperature and additive content. The results showed that NaBF 4 could promote the transformation of anatase TiO 2 to rutile TiO 2 . An appropriate amount of rutile TiO 2 forms a heterojunction with anatase TiO 2 , which enables efficient charge separation and transfer at the interfaces of the composites. The optimized sample (MT550) showed 98 % degradation of rhodamine B (RhB) under visible light irradiation within 180 min, which was 8 times higher than that of the sample without added NaBF 4 . This study presents a strategy for the synthesis of mixed-phase (anatase/rutile) TiO 2 /Ti 3 C 2 composites with high activity under visible light, which has potential in the design and application of photocatalytic materials.
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
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Tianxing Fang,Qingyi Wei,Erwen Wu,Hongbin Pu
Malachite green (MG)-contaminated aquatic products pose a serious threat to animal and human health. Hence, a novel recyclable surface-enhanced Raman scattering (SERS) substrate based on AuNPs/TiO 2 /Ti 3 C 2 heterostructures was developed for the detection and degradation of MG in aquatic products. Specifically, AuNPs/TiO 2 /Ti 3 C 2 heterostructures were synthesized by in situ oxidation and electrostatic adsorption based on Ti 3 C 2 nanosheets. The excellent photocatalytic and SERS performance of the AuNPs/TiO 2 /Ti 3 C 2 was demonstrated by Density functional theory (DFT) calculations and experimental results, which was attributed to the enhancement of charge transfer (CT) after the formation of heterostructures. The results demonstrate that AuNPs/TiO 2 /Ti 3 C 2 is highly sensitive and recyclable. The detection limit of the sensor for MG is 8.91 × 10 −5 mg/L. The sensor can be recycled for five times under the condition of light, and shows satisfactory self-cleaning performance in the food matrix, providing a possible alternative solution for the recyclable detection of MG.
研究领域:
环境科学
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食品科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Rongdi Tang,Daoxin Gong,Yaocheng Deng,Sheng Xiong,Jie Deng,Ling Li,Zhanpeng Zhou,Jiangfu Zheng,Long Su,Lihua Yang
In this study, a novel π-π stacked PDI/g-C 3 N 4 /TiO 2 @Ti 3 C 2 photocatalyst with step-scheme (S-scheme) heterojunction was constructed to boost the atrazine (ATZ) photocatalytic degradation by activating peroxymonosulfate (PMS). The π-π interaction in the PDI/g-C 3 N 4 induced the delocalization of the photoelectrons, therefore promoted their migration. Meanwhile, the intimate contact and the staggered band configurations between the PDI/g-C 3 N 4 and TiO 2 @Ti 3 C 2 results in the S-scheme heterojunction thus declined the recombination of photocarriers. The π-π interaction and S-scheme heterojunction synergistically promoted the ATZ removal rate to 75% within one hour and can be well-adapted in a variety of environments. It was found that 1 O 2 domain the photocatalysis, and the H 2 O 2 generated during the reaction may also be helpful for the process. The transformation of ATZ, intermediates, and three pathways during the process were also investigated via LC-MS. Moreover, the total organic carbon analysis shows that the mineralization of ATZ reached 46.08%.
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
危险品化学品经营许可证（带存储）