APPLIED ORGANOMETALLIC CHEMISTRY
·
2018
·Vol. 32
·期 4
·e4285
·
IF 3.581
Zhiquan Yang,Jie Ding,Jinna Feng,Chong He,Ying Li,Xiaowen Tong,Xiaojun Niu,Hongguo Zhang
Because of their desired features, including very specific surface areas and designable framework architecture together with their possibility to be functionalized, Metal Framework (MOF) is a promising platform for supporting varied materials in respect of catalytic applications in water treatment. In this work, a novel visible-light-responsive photocatalyst that comprised BiVO 4 together with MIL-125(Ti), was synthesized by a two-step hydrothermal approach. The characterization of as-obtained samples as performed by X-ray diffraction, scanning electron microscopy, high resolution transmission electron microscopy, Fourier transform infrared spectroscope, X-ray photoelectron spectroscopy and ultraviolet-visible diffuse reflection spectra. Rhodamine B was selected being a target for the evaluation of the photocatalytic function of as-developed photocatalyst. The photocatalytic reaction parameters, for example, the content of BiVO 4 as well as initial concentration of Rhodamine B was researched. The composite photocatalyst possessing Bi:Ti molar ratio of 3:2 brought to light the fact that the greatest photocatalytic activity had the ability to degrade 92% of Rhodamine B in 180 min. In addition to that, the BiVO 4 /MIL-125(Ti) composite could keep its photocatalytic activity during the recycling test. The phenomenon of disintegration of the photo-generated charges in the BiVO 4 /MIL-125(Ti) composite was brought to discussion as well.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2013
·Vol. 15
·期 10
·1-6
·
IF 2.175
Zhang Ying,Chen Yu,Zhang Yupeng,Cong Huahua,Fu Bo,Wen Shanpeng,Ruan Shengping
A novel porous nanosized humidity-sensing material of amine-functionalized titanium metal organic framework (MOF), NH 2 -MIL-125(Ti), was investigated. NH 2 -MIL-125(Ti) nanoparticles with high phase purity and good physicochemical property were synthesized by a simple hydrothermal method. The nanosized MOF was characterized by X-ray diffraction and scanning electron microscope. The average size of the MOF nanoparticles is around 300 nm. Then NH 2 -MIL-125(Ti) humidity sensor was fabricated by coating the nanosized materials on interdigitated electrodes. The humidity sensor based on NH 2 -MIL-125(Ti) shows good linearity of RH (11–95 % RH), as well as fast response and recovery time. The RH detecting range is from 11 to 95 % RH at 100 Hz. The response and recovery time are about 45 and 50 s, respectively. Moreover, the sensing mechanism was discussed by complex impedance analysis in detail. These results indicate the potential application of NH 2 -MIL-125(Ti) in humidity sensors.
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ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Shuangchao Sheng,Zheng Zhang,Meng Wang,Xin He,Caiyun Jiang,Yuping Wang
Because of the tenacious vitality of tetracycline, it would also cause toxic effects on surface water at low concentrations. Therefore, it was critical to design the material as a platform with specific selective sensing functions and promote removal. A MIL-125(Ti)-derived cake-like TiO 2 with recognition sites (MT450) were successfully compounded by a simple mixed-solvent thermal method and using calcination method. MT450 not only inherited the large specific surface area of MIL-125(Ti), but also had excellent photoelectrochemical properties and introduced numerous recognition sites to give it the ability to quickly and specifically recognize and bind antibiotics, and improved the selectivity and sensitivity of photoelectrochemical detection effect. The results showed that MT450/ITO modified electrode was explored as novel photoelectrochemical sensor, which presented remarkable performance for tetracycline detection in a wide linear range from 0.005 to 50 μM and the LOD was estimated as 2.83 nM. Because the imprinted cavity made the affinity between tetracycline and MT450 greater, and was profit to the opening of the electron/hole transfer channel. The proposed strategy showed that the Ti-MOFs derived material with imprinted cavities can be evaluated the selective detection of photoelectrochemistry. Furthermore, the selective effects of the molecularly imprinted materials were evaluated by photocatalytic degradation of pollutants experiment.
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CHEMOSPHERE
·
2022
·
IF 8.943
Cheng Cheng,Dongyun Chen,Najun Li,Hua Li,Qingfeng Xu,Jinhui He,Jianmei Lu
This paper reports the application of NH 2 -MIL-125(Ti) modified carbon nitride C v -C 3 N 4 with carbon vacancies in the removal of NO. We performed a series of characterizations of the complex and compared various ratios with the individual components. The results of UV spectrum analysis show that the composite's range of light absorption expanded due to the modification of Ti metal–organic framework. Furthermore, the results of photocurrent and electrical impedance indicate the compound has a better ability to generate and transfer electrons . The increase in the compound's NO removal efficiency (up to 63%) indicates that MOF has a positive effect on C v -C 3 N 4 modification—a good method for photocatalysis . Moreover, the compound can promote photocatalysis in a favorable direction.
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RSC Advances
·
2024
·Vol. 14
·期 8
·5142-5148
·
IF 3.9
Chunhong Jin,Jingchao Liu,Yilin Yin,Zenghe Li
In wastewater containing heavy metals, Cr(VI) is a potentially toxic metal, mainly derived from production and processing processes such as textile printing, dyeing, ore mining, battery applications, metal cleaning and electroplating. WO3 is widely used in photocatalytic degradation and reduction, and its utilization rate of visible light is high. However, the rapid recombination of photogenerated electron–hole pairs of WO3 limits its use. In this work, the composite material (WxMy) of WO3 and MIL-125 (Ti) was prepared by the ball milling method, and the catalyst was used to photocatalytically reduce Cr(VI). After using W90M10 as a photocatalyst for 50 min, the reduction rate of Cr(VI) can reach 99.2%, and the reduction rate is 2.3 times that of WO3. After 5 cycles of use, the reduction rate can still reach 91.3%. It is mainly due to the formation of a II-type heterojunction between WO3 and MIL-125 (Ti), which promotes the separation of photogenerated electron–hole pairs, thus improving the efficiency of photocatalytic reduction of Cr(VI).
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mengjia Zhou,Ziyan Cui,Yun Liu,Dan Wang,Yanzhou Li,Junwei Zhao,Wenwu You
In this study, a highly sensitive photoelectrochemical (PEC) immunosensor for the detection of carcinoembryonic antigen (CEA) utilizing core-sheath-type TiO 2 @NH 2 -MIL-125(Ti) nanocone array heterostructures was developed. The immunosensor was constructed by depositing NH 2 -MIL-125(Ti) as a sheath onto FTO/TiO 2 nanocones through seed-assisted solvothermal synthesis. The TiO 2 @NH 2 -MIL-125(Ti) heterostructure showcased superior PEC detection capabilities for CEA, leveraging the quantum and tip effects of the TiO 2 nanocones along with the broad-spectrum absorption of NH 2 -MIL-125(Ti), which collectively enhanced light utilization and photoelectric conversion efficiency. The internal electric field at the NH 2 -MIL-125(Ti)/TiO 2 interface enabled efficient photogenerated electron transfer, eliminating the need for external bias and enhancing photocurrent. The antibody-functionalized surface effectively captured CEA, resulting in a clear decrease in photocurrent. Under optimized conditions, the immunosensor exhibited a linear response to CEA in the range of 0.1 pg/mL to 100 ng/mL with a remarkable detection limit of 0.54 fg/mL. The developed PEC immunosensor demonstrated high stability and excellent reproducibility, providing an innovative strategy for the development of sensitive photoactive heterojunction materials for biomarker immunosensing applications.
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Materials Advances
·
2023
·Vol. 4
·期 3
·940-947
·
IF 5
Xiaobing Yang,Junjie Pan,Bingcong Xing,Wenjie Lei,Yingchun Fu,Kejun Cheng
Nowadays, aflatoxin B1 (AFB1) contamination is considered as one of the most common food safety issues for humans and animals. As one of the most advanced oxidation techniques, photocatalytic degradation can break down organic contaminants into nontoxic and harmless materials efficiently. In this paper, we explored the degradation efficiency of AFB1 by ZnIn2S4. To promote the photocatalytic degradation efficiency of AFB1, ZnIn2S4 was coupled with MIL-125(Ti) and then doped with La [this hybrid is denoted as La-ZnIn2S4/MIL-125(Ti)] to effectively convert it via photocatalytic generation of superoxide radicals (˙O2− and ˙OH) and achieve much enhanced photocatalytic performance, which is demonstrated by degrading 97.6% of AFB1. According to the transient photocurrent responses, the doping of La and coupling with MIL-125(Ti) can highly improve the efficient separation of the photoinduced electron–hole pairs on ZnIn2S4, leading to the effective conversion of OH− and O2 into ˙O2− and ˙OH, respectively, during the photodegradation process. This strategy of coupling with MOFs and doping with rare earth elements provides a facile and efficient method for degrading food pollutants produced by aflatoxins.
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Food Analytical Methods
·
2022
·Vol. 15
·期 10
·2830-2839
·
IF 3.498
Tang Jing,Li Jie,Liu Tianna,Tang Wenjing,Li Nali,Zheng Shengbiao,Guo Jiahao,Song Changchun
Electrochemical determination of tert-butylhydroquinone (TBHQ) is vital to food safety due to negative health effects; however, bare electrode of traditional electrochemical sensors generally has a narrow linear range and low sensitivity, limiting their practical application. Accordingly, the nano-architecture fabricated with N-doped TiO 2 –carbon nano-composites (TiO 2 /NC) is prepared by the thermolysis of NH 2 functionalized MIL-125(Ti) metal–organic frameworks (NH 2 -MIL-125(Ti)). TiO 2 /NC composites are firstly developed as the electrochemical material for electrochemical determination of TBHQ. The TiO 2 /NC composites with a highly porous structure, excellent conductivity and electron transportation, and large surface area show remarkable electrochemical oxidation ability for TBHQ. Under optimal conditions, TiO 2 /NC composite-modified electrode presents a broader linear response to TBHQ concentration of 0.05–100 μM with the detection limit as low as 4 nM (S/N = 3). Finally, the sensor platform is implemented directly to determine TBHQ in edible oil for evaluation of its practical application. TiO 2 /NC composites sensor fabricated perform larger linear range with high sensitivity and anti-interference properties, which can be used as a potential for electrochemical determination of TBHQ.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lu Liu,Yajie Chen,Jiajia Zhang,Fanze Zeng,Jinyu Bao,Wenpeng Li,Guohui Tian
The rational construction of heterojunctions with surface defects and localized surface plasmon resonance (LSPR) effect is a promising strategy for improving CO 2 photoreduction performance. Herein, the one-dimensional/two-dimensional (1D/2D) S-scheme heterostructures integrated with non-stoichiometric 1D W 18 O 49 nanowires (H-W 18 O 49 NWs) and 2D ultrathin MIL-125(Ti) nanosheets (MIL-125(Ti) NSs) were constructed by self-assembly for photocatalytic CO 2 reduction. In situ X-ray photoelectron spectroscopy (XPS), electron spin resonance spectra (ESR), and photoluminescence (PL) spectroscopy characterizations confirm the construction of S-scheme heterojunction and the solid internal electric field at the heterointerface enables effective spatial charge separation while keeping a strong redox capability. The hot electrons generated from the LSPR effect of visible-near-infrared light-excited H-W 18 O 49 NWs can be injected into MIL-125(Ti) NSs to increase the electron density and accelerate the reaction rate. Thus, the optimized H-W 18 O 49 NW/MIL-125(Ti) NS heterostructure exhibited good performance, achieving a CO yield of 202.37 μmol g -1 h −1 . This study enriches the diversity and architecture of available heterostructures for photocatalytic applications.
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ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Jinqiang Fu,Fenglan Liang,Wenjing Zhong,Tao Kuang,Ziyuan Yin,Yongshi Li,Zhenggui Huang,Hongli Liu,Deyun Ma
Establishing a simple and consistent strategy to adjust the photocatalyst surface to improve the photocatalytic performance is crucial but remains challenging. Herein, a photocatalyst of TiO 2 -Q-Pd is obtained through one-step quenching of TiO 2 (derived from NH 2 -MIL-125(Ti)) into an aqueous solution of sodium tetrachloropalladium, which displayed a significant improvement in photocatalytic activity, achieving 97 % tetracycline degradation within 60 min and 95 % mineralization at 5 h. The mineralization reaction rate (0.6321 h −1 ) was 2.75 times that of the commercial TiO 2 . Our findings show that quenching leads to the creation of numerous zigzag surfaces and the near-surface palladium atom doping, therefore adjusting the chemical environment of Ti, which accelerates electron-hole pair separation and transfer, and thereby improves the photocatalytic performance. This finding introduces a novel approach to activating metal oxide catalysts derived from MOFs and expands the role of quenching chemistry in catalytic processes.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Rassu Pietro,Cappai Luca,Stagi Luigi,Liu Ruirui,Enzo Stefano,Mulas Gabriele,Garroni Sebastiano,Malfatti Luca,Innocenzi Plinio,Ma Xiaojie,Wang Bo
Alcohol and water photooxidation reactions are employed in concert with optical spectroscopy analyses to demonstrate the occurrence of multiple and distinctive charge-transfer (CT) mechanisms in the environmental photocatalyst MIL-125(Ti). The contribution of ligand-to-metal CT (LMCT) mechanisms increases at wavelengths lower than 320 nm while that of node oxygen-to-metal CT (OMCT) mechanisms increases at longer wavelengths. The localization of photogenerated holes on different atoms leads to a selective reactivity of the framework depending on the mechanism and, during hydroxylation processes, to its spontaneous transition to the isostructural MIL-125-OH(Ti) and the development of an additional LMCT mechanism with a long-lived emission. Furthermore, a previously unidentified and extrinsic CT mechanism is spectroscopically related to the formation of terephthalate-based oligomers . The coexistence of distinctive CT mechanisms in MIL-125(Ti) implies their critical role in catalyst efficiency, and mastering them proves to be a powerful and simple strategy to produce the valuable MIL-125-OH(Ti).
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CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Shaoming Yang,Yaqi Wang,Jiayi Chen,Yun Feng,Jiahui Li,Yongxin Liu,Liangpeng Zeng,Ji Zhao,Jiali Zhang
Owing to its environmental compatibility and energy conservation properties, photocathodic protection (PCP) has emerged as a promising approach for metal corrosion protection. The key to efficient PCP lies in developing semiconductor composite materials that combine excellent photoelectrochemical performance with a simple preparation process. Herein, a carbon-doped TiO 2 /Bi 2 S 3 composite (Bi 2 S 3 /C-TiO 2 ) was fabricated via a single-step, low-temperature hydrolysis strategy using NH 2 -MIL-125(Ti) as the precursor, concurrently achieving carbon doping and incorporating a narrow-bandgap semiconductor. Characterization by UV-Vis diffuse reflectance spectroscopy and photoelectrochemical testing under illumination revealed that the composite exhibits significantly enhanced visible-light absorption while effectively suppressing photogenerated charge carrier recombination. Under optimized conditions, the Bi 2 S 3 /C-TiO 2 photoanode shifted the potential of coupled 304 stainless steel (304SS) to −464 mV (vs. Ag/AgCl) under visible-light irradiation—substantially below its corrosion potential—demonstrating effective photogenerated cathodic protection for 304SS.
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