Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Xianghan Cheng,Zhongmin Liu,Ruilin Wang,Yajun Guo,Wenyuan Han,Yong-Zheng Zhang,Da-Shuai Zhang,Xiuling Zhang,Suijun Liu,Longlong Geng
Regulating the separation and transport capabilities of the photocarriers is an important strategy to enhance corresponding activity of photocatalysts. In this work, novel Ti-MOF/Ti 3 C 2 heterojunction with face-to-face intimate contact was design and synthesized through a hydrothermal assemble route. The negatively charged Ti 3 C 2 not only facile the absorb of Ti nodes but also offer rich nucleation sites for the in-situ growth Ti-MOF. Under visible light irradiation, the optimized TM-0.05 exhibited exceptional photocatalytic activity and reusability during tetracycline photocatalytic degradation process. The rate constant reaches 1.83 × 10 −2 min −1 over TM-0.05, which was 5.3 times and 2.3 times higher than that of sole Ti-MOF and Ti 3 C 2 , respectively. Combined photoelectric characterization confirmed the improved photocatalytic activity was predominantly due to the excellent conductivity of Ti 3 C 2 and the tight interface connection between the two semiconductors, thus accelerating the interfacial charge separation and transport. Scavenger experiments, EPR, and LC-MS analysis confirmed the key role of •O 2 - , •OH and photogenerated holes during tetracycline degradation, and finally a possible mechanism was postulated. This work provides a new approach for constructing MOF/MXene structures via in situ self-assembly strategy, and expand their application in refractory pollutants photocatalytic degradation process.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Jie Xu,Hongji Li,Huimin Feng,Yuqin Ma,Dandan Wang,Jianwei Zhu
The removal of refractory organic contaminants in the environment is vital, but developing highly active catalysts with a simple synthesis process remains a challenge. Herein, NH 2 -MIL-125(Ti) (Ti-MOF) as a template, Ti 3+ -TiO x clusters of different quantities were embedded in the CdIn 2 S 4 nanosheets to construct Ti 3+ -TiO x /CdIn 2 S 4 (TiCIS) heterojunction by an in-situ self-assembly strategy, which had a hollow structure, strong visible light absorption, high separation rate of carriers, and more active sites. During the degradation experiment of Rhodamine B (RhB), TiCIS25 exhibited the best photocatalytic performance, and 98.0% of RhB was degraded within 60 min of visible irradiation. The intermediates in the RhB degradation and their ecotoxicity were analyzed, which revealed that RhB degradation was a detoxification process. The radical trapping experiments and electron spin resonance (ESR) tests indicated that e - , 1 O 2 , and ·O 2 - are the main active species for RhB degradation. Moreover, a possible photocatalytic mechanism was proposed based on electrochemical tests. The photodegradation performance of the as-prepared TiCIS catalyst under different reaction parameters (authentic water matrices, initial pH, coexisting anions, organic matter concentration, actual sunlight, reaction temperature, and multiple pollutants) and circulating experiments, as well as the photo-reduction process CO 2 , reflected that TiCIS25 possessed excellent practicability, cyclic stability, and universal applicability. Above all, TiCIS25 exhibited great potential in photocatalytic processes, and the work provided a feasible strategy for designing high-performance 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
APPLIED SURFACE SCIENCE
·
2024
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IF 6.3
Bingbing Cui,Guodong Fu
Given that heterojunction engineering is an effective method for improving the separation efficiency of photoexcited electrons in WO 3 -based photochromic systems, a series of solid-state photochromic Zr/Ti-MOF@WO 3 heterojunctions prepared via a facile hydrothermal strategy, where Zr/Ti-MOF with photosensitivity and chemical stability was selected as template to load WO 3 . Zr/Ti-MOF@WO 3 heterojunctions were verified as nanoparticles filled with thin layer structure and WO 3 was diffused into the Zr/Ti-MOF planar. The appropriate conductive band energies facilitate the transport of photostimulated electrons from Zr/Ti-MOF to WO 3 , resulting in a fast photresponse in color changes (it only takes 1 s). In addition, a carrier for information storage and data dynamic encryption was developed on the basis of the photochromic Zr/Ti-MOF@WO 3 heterojunctions. This work presents a promising way to improve the electron/holes separation efficiency by constructing unique heterojunctions and further explore novel WO 3 -based photochromic systems and broaden their applications in rewritable media and data security.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Tianying Peng,Wenyong Mei,Jin Zhang,Saiwen Liu
4-Aminophenol (4-AP), a crucial organic intermediate in the synthesis of acetaminophen, poses significant toxicity and potential environmental and health risks. Titanium dioxide@ titanium-based metal–organic frameworks (TiO2@Ti-MOFs) form a three-dimensional heterogeneous composite structure by covalently binding to the surface of 2D transition metal carbides and nitrides (MXenes). The synergistic effect between the porosity of titanium-based metal–organic frameworks (Ti-MOFs) and the layered structure of MXenes provides abundant adsorption sites, effectively enriching the target molecule 4-AP and enhancing the sensor's selectivity. The high conductivity of MXenes, combined with the semiconductor properties of TiO2@Ti-MOFs, accelerates electron transfer on the electrode surface, resulting in an increased response current and improved sensitivity and detection range. The detection range of the TiO2@Ti-MOF/MXene electrochemical sensor spans from 0.5 to 50 μM, with a detection limit of 0.16 μM. This sensor is effectively applicable for detecting 4-AP in real water samples, such as tap water and Qingshan Lake water, demonstrating satisfactory recovery.
研究领域:
材料科学
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环境监测
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电分析化学
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纳米技术
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传感器与生物传感器
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Jinyuan Hu,Boru Cai,Yaohui Wang,Zhengran Bian,Tianle Hou,Yanwei Sun
Amorphous metal–organic frameworks (MOFs) present significant potential for achieving high permeability and selectivity in separation applications. However, developing effective fabrication strategies for amorphous MOF membranes with well-defined channels remains a considerable challenge. In this study, amorphous titanium-based MOF membranes with concurrently optimized intercrystalline and intracrystalline selective transport channels were successfully prepared. The resulting membranes exhibited exceptional sieving performance for dyes with molecular weight cutoff of 600 Da. Additionally, defect-rich dual water channels within and between the amorphous MOF aggregates led to a remarkable water permeances up to 107.4 L m −2 h −1 bar −1 , significantly surpassing the benchmarks set by other nanofiltration membranes. This work offers valuable insights into the influence of amorphization on the design of a wide variety of MOF membranes, paving the way for advanced separation applications.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2025
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IF 6
Jing Chen,Yaqin Shi,Wenli Xue,Wenjing Liu,Rongfang Ma
Catechol is an important fine chemical raw material, and is widely used in the production of chemicals. However, this compound has low degradability and high toxicity, and was highly susceptible to release into the environment during production and application, posing a potential threat to ecosystems and human health. Therefore, in this paper, a PVP-functionalized NH 2 -Ti-MOF was synthesized using PVP as a shape-controlling agent, NH 2 -BDC as an organic ligand, and TBOT as a metal source. A sensor for dual-mode detection of catechol was constructed based on the interaction between catechol and PVP-NH 2 -Ti-MOF. When catechol was added to the probe solution, the fluorescence intensity at 428 nm was found to decrease based on the static quenching effect. At the same time, it was found that a new ultraviolet absorption peak appeared at 282 nm in the ultraviolet absorption spectrum, and the absorption peak intensity increased with the increase of catechol concentration, thus realizing the dual mode detection of catechol. Compared with the single-mode sensor, the dual-mode sensor is more accurate, fast and sensitive, which provides a new idea for the detection of catechol in water samples.
研究领域:
环境化学
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材料科学
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传感器与生物传感器
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分析化学
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DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2020
·Vol. 36
·期 3
·447-452
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IF 1.063
He Yilei,Zhang Xing,Wei Yanze,Chen Xiaoyu,Wang Zumin,Yu Ranbo
Nanostructured N-doped TiO 2 photocatalyst has been prepared via a new approach from Ti-based MOF[NH 2 -MIL-125(Ti)] precursor. The success of N doping enhances light absorption and narrows the bandgap. Moreover, the as-prepared nanostructure is constructed with tiny nanoparticles and resembles a pie-like morphology inherited from the MOF, which accelerates electron transfer. Hence, as a photocatalyst for the degradation of methylene blue(MB) under visible light irradiation, the N-doped TiO 2 (N-TiO 2 ) nanostructure shows higher photocatalytic activity with a reaction rate constant of 0.018 min −1 than that of the TiO 2 -P25 and TiO 2 under the visible light.
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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产品关联
DOI
高影响因子
CHEMOSPHERE
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2024
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IF 8.1
Jun Guo,Jun Hou,Zijun Yang,Jun Xia,Jun Wu,Guoxiang You,Lingzhan Miao
NH 2 -MIL-125(Ti) materials had great potential for photocatalytic applications but had low activity due to exciton effect and narrow absorption range of visible light. The surface oxygen-containing negative functional groups of boron nitride quantum dots (BNQDs) could overcome these defects, but due to the low load capacity, a higher specific surface area of the substrate was usually required. In this paper, a hollow Ti-MOF material was developed by etching technology. The hollow structure formed by tannic acid etching broadened the absorption range of visable light and provided more alternative surfaces for loading BNQDs. The 85.2% of high tetracycline (TC) removal efficiency for the best sample (BNQDs-5@20-Ti-MOF + PMS) was obtained, which was about 56.8 and 1.9 times of the 20-Ti-MOF and BNQDs-5@20-Ti-MOF, respectively. BNQDs-5@20-Ti-MOF + PMS system showed a great TC degradation efficiency in a wide pH range (pH = 5–9). In addition, reaction temperature and the inorganic ions did not show significant inhibition effect for TC removal. Both free radical and non-free radical pathways were involved in the TC degration by BNQDs-5@20-Ti-MOF + PMS system, among which O 2 •− and 1 O 2 played the key roles. Interestingly, multiple 1 O 2 production paths contributed to the high efficiency and stability of BNQDs-5@20-Ti-MOF + PMS system. This study revealed a reasonable combination of Ti-MOF and BNQDs, which provided a new efficient photocatalyst for environmental remediation.
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
PubMed
高影响因子
Molecular Catalysis
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2025
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IF 4.9
Can Sun,Runze Guo,Zhexiao Zhu,Shouxin Zhu,Jingyi Qu,Zijie Fang,Xiaolu Xu,Jiahui Lin,Yangben Chen,Shijie Zhang,Hui Zheng
Photocatalytic nitrogen fixation as a green, environmentally friendly, mild and low energy-consuming nitrogen fixation is considered as an ideal way to produce ammonia. Herein, inspired by nitrogen-fixing enzymes, the MOF materials Fe-sdc and Ti-sdc were synthesized by a simple solvothermal synthesis method using Fe and Ti as metal nodes and 4,4′-stilbenedicarboxylic acid (H 2 sdc) as a ligand. The ammonia production rates of Fe-sdc and Ti-sdc were 61.01 μmol g −1 h −1 and 46.84 μmol g −1 h −1 . The 15 N 2 isotope experiments were utilized to determine the nitrogen source for ammonia synthesis during the nitrogen fixation process of Fe-sdc. Various characterization analyses were also utilized to analyze the reasons for the better nitrogen fixation performance of the two catalysts.
研究领域:
材料科学
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环境科学
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催化化学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2023
·Vol. 52
·期 35
·12244-12252
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IF 4
Shen Yu,Zhan Liu,Jia-Min Lyu,Chun-Mu Guo,Yi-Long Wang,Zhi-Yi Hu,Yu Li,Ming-Hui Sun,Li-Hua Chen,Bao-Lian Su
The catalytic oxidative desulfurization (ODS) technique is able to remove sulfur compounds from fuels, conducive to achieving deep desulfurization for the good of the ecological environment. Ti-based metal–organic frameworks (Ti-MOFs) possessing good affinity to organic reactants and considerable numbers of Ti active sites are promising catalysts for ODS. However, current Ti-MOFs suffer from severe diffusion limitations caused by the size mismatch between sole micropores and bulky sulfur compounds, leading to poor ODS performance. Here, a facile method of intraparticle ripening without any additive is developed to obtain hierarchically meso–microporous Ti-MIL-125 single crystals (Meso-Ti-MIL-125) for the first time. Such Meso-Ti-MIL-125 shows a BET surface area of 1401 m2 g−1 and a mesoporous volume that is 1.7 times as high as that of the conventional Ti-MIL-125. Our novel Meso-Ti-MIL-125 exhibits excellent catalytic performance in the ODS of a series of bulky thiophenic sulfur compounds, completely removing benzothiophene (BT), dibenzothiophene (DBT), and 4,6-dimethyldibenzothiophene (DMDBT) from model fuels, which is, respectively, 2.4 times, 1.5 times, and 6.7 times higher than the removal achieved with conventional Ti-MIL-125. Such a facile synthetic strategy is envisioned to be applied in many kinds of crystalline materials, such as zeolites, for industrial production.
研究领域:
化学工程
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材料科学
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环境科学
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催化
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DOI
PubMed
高影响因子
Chemical Science
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2020
·Vol. 11
·期 15
·3978-3985
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IF 9.346
Jing Cao,Wenjie Ma,Kangjie Lyu,Lin Zhuang,Hengjiang Cong,Hexiang Deng
We report the design and synthesis of a titanium catecholate framework, MOF-217, comprised of 2,4,6-tri(3,4-dihydroxyphenyl)-1,3,5-triazine (TDHT) and isolated TiO6 clusters, with 2-fold interpenetrated srs topology. The dynamics of the organic linker, breaking the C3h symmetry, allowed for reversible twist and sliding between interpenetrated frames upon temperature change and the inclusion of small molecules. Introduction of 28 wt% imidazole into the pores of MOF-217, 28% Im-in-MOF-217, resulted in four orders of magnitude increase in proton conductivity, due to the appropriate accommodation of imidazole molecules and their proton transfer facilitated by the H-bond to the MOF structure across the pores. This MOF-based proton conductor can be operated at 100 °C with a proton conductivity of 1.1 × 10−3 S cm−1, standing among the best performing anhydrous MOF proton conductors at elevated temperature. The interframe dynamics represents a unique feature of MOFs that can be accessed in the future design of proton conductors.
研究领域:
材料科学
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化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Shanshan Zhang,Guizhen Liu,Sihai Lv,YingLi Zhu,Pingan Chen,Hui Luo,Xiangcheng Li,Fu Chen
Magnetic carbon-based microwave absorption materials (MAMs) derived from metal-organic frameworks (MOFs) have been regarded as promising candidates for addressing the electromagnetic pollution. The construction of magnetic carbon-based MAMs derived from MOFs with ferromagnetic centers (Fe, Co, Ni etc.) and their composites has become a mainstream in recent years. However, MOFs with non-magnetic centers have received less attentions due to the challenges in achieving magnetic-dielectric synergistic effect and proper impedance matching in their derivatives. In this work, a facile metal-polyphenol network coating strategy has been proposed to facilitate the construction of magnetic MWCNTs decorated TiN 0.9 /NC absorber derived from non-magnetic MIL-125(Ti). The regulation effect of carbothermal temperature on magnetism, defect density, graphitization degree as well as electromagnetic parameters of absorbers have been systematically investigated. The obtained composites exhibit outstanding microwave absorption performance due to the magnetic-dielectric synergistic effect and improved impedance matching. The minimum reflection loss reaches −42.55 dB at 1.91 mm and the effective absorption bandwidth reaches as wide as 4.6 GHz with an ultra-thin thickness of only 1.38 mm. It is believed that this study provides a new way to construct efficient magnetic carbon-based MAMs with non-magnetic metal-based MOFs and a meaningful exploration for the preparation of ultra-thin absorbers.
研究领域:
材料科学
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电磁学
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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）