Journal of Materials Chemistry C
·
2013
·Vol. 1
·期 25
·3947-3954
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IF 0
Juan Liu,Peiyang Gu,Feng Zhou,Qingfeng Xu,Jianmei Lu,Hua Li,Lihua Wang
In this paper, we report the synthesis, properties and electrical memory characteristics of block copolymer PStCH-b-P4VP and its TCPP composites. Both the optical absorption and photoluminescence indicate the strong interaction between the P4VP blocks and TCPP. The electrical switching behavior can be tuned through utilizing the loading ratio of TCPP in the PStCH-b-P4VP matrix. The memory device characteristics of the composites with 0%, 1% and 3% of TCPP in the PStCH-b-P4VP matrix are WORM, DRAM and DRAM, respectively. The OFF state for PStCH-b-P4VP and the 3% TCPP:PStCH-b-P4VP composite memory device can be fitted with the Poole–Frenkel (PF) emission and space-charge-limited-current (SCLC), respectively. Both of the ON-state currents are fitted with the Ohmic model. The 3% TCPP composite-based device exhibits a lower threshold voltage than the 1% TCPP composite-based device. The present study suggests that the electrical memory characteristics could be efficiently tuned by the PStCH-b-P4VP (donor)/TCPP (acceptor) ratio, which is good for potential application in polymer composite memory devices.
研究领域:
材料科学
·
电子工程
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DOI
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Z.H.A.O.-X.U.A.N. Jiang
In this investigation, UiO-66-NH 2 was effectively synthesized through a solvothermal approach, utilizing benzoic acid and hydrochloric acid (HCl) as modulating agents. This synthesis process intentionally introduced defects mediated by benzoic acid, and the degree of these defects was precisely adjusted by the concentration of HCl. Subsequently, the material underwent a covalent modification process through an amidation reaction, resulting in the attachment of tetrakis (4-carboxyphenyl) porphyrin (TCPP). The results demonstrated a significant improvement in the photocatalytic reduction of Cr(VI), showcasing a 125 % elevation in reduction efficiency as compared to the unmodified UiO-66-NH 2 material serving as the baseline. The performance enhancement is due to the synergistic effect of the defect structure and TCPP modification, which enhances the light absorption, promotes charge transfer and separation, reduces the recombination rate, and improves the adsorption capacity and light absorption efficiency of Cr(VI). This research introduces an innovative approach and a highly effective catalyst, offering a novel solution for modifying metal-organic frameworks (MOFs) and enhancing their photocatalytic performance in the reduction of Cr(VI).
研究领域:
材料科学
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环境科学
·
化学工程
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DOI
高影响因子
POLYHEDRON
·
2024
·
IF 2.4
Rong Chen,Yuting Zhu,Na Song,Huixue Fang,Yan Ma,Lengfeng Wu,Shengjun Liu,Kui Zhang
Photosensitizers are highly desirable due to their many applications. Photosensitizers play an important role in photocatalysis. However, conventional photosensitizers are not conducive to recycling. The proximity of the photosensitizing dye to the corresponding carrier is important in dye sensitization and in enhancing photocatalytic performance; however, most photosensitizers exhibit weak interactions with carriers. The transition of the photosensitizer from the molecule to the crystalline state enhances the stability of the photocatalyst and improves photocatalytic performance. In this study, MOF (metal–organic framework) @Zn-TCPP(M) hybrids were synthesized. The H 2 yield of NM@Zn-T(Cu)-3 was 620.56 µmol g −1 (4 h), which was 10.64 times and 3.80 times greater than Zn-TCPP(Cu) and NH 2 -MIL-125, respectively. The results revealed that the modification of the MOF with Zn-TCPP(M) altered the charge-transfer capability, and thus improved photocatalytic activity. This study reports a novel strategy to enhance the photocatalytic performance of Metal-Organic Framework using Zn-TCPP(M).
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 44
·20336-20343
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IF 3.3
Meihui Lu,Aichen Dong,Xinyang Li,Xuanqi Liu,Ziqing Zhang,Tao Tian,Liqiang Jing
Semiconductor photocatalysis is a potential solution to meet energy needs with green and inexhaustible solar energy. However, designing efficient and stable photocatalysts is a challenging task due to the limited ability to effectively separate electrons and holes. In this paper, by using a straightforward ethanol dispersion technique, we were able to combine ultrathin layered Cu-TCPP MOFs with g-C3N4 nanosheets, resulting in the creation of an extremely effective nano-composite photocatalyst with exceptional UV-vis activity. CT/CN heterojunctions displayed remarkable photocatalytic efficacy for the production of H2, with 3CT/CN showcasing a five-fold enhancement in photoactivity as compared to the unadorned g-C3N4. Based on the results of photoluminescence spectroscopy, electrochemical impedance spectroscopy, and electrochemical reduction, the considerably improved charge transfer and separation, together with the possible catalytic capability of uniformly distributed metal nodes in Cu-TCPP, are believed to be the underlying reason for the observed exceptional photoactivity. After thorough analysis, a potential process for charge transfer and segregation between g-C3N4 and Cu-TCPP has been suggested.
研究领域:
材料科学
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能源化学
·
光催化
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DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 3
·e70021
·
IF 0
Zehua Yuan,Munire Tuerhong,Xirenayi Aisikaer,Gulgina Mamtmin
The Type II heterojunction, characterized by its favorable band alignment, facilitated efficient charge separation in photocatalysts. Concurrently, oxygen vacancies can enhance light absorption and activated reactants, thereby improving photocatalytic efficiency. This study presented the synthesis of Bi-TCPP/Bi 2 S 3 heterojunction photocatalysts, which were rich in oxygen vacancies, using a green, one-pot method. The composite exhibited superior photoelectrochemical and photocatalytic reduction properties, achieving a rate constant of 0.03829 min −1 for Cr(VI) reduction and a remarkable reduction rate of 95.73%. After five cycles, the photocatalytic activity remained above 91.30%, demonstrating excellent stability and efficiency in reducing persistent pollutants. This work introduced a novel strategy for photocatalyst design and made a significant contribution to the fields of environmental remediation and green chemistry.
研究领域:
环境科学
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材料科学
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绿色化学
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DOI
Applied Materials Today
·
2021
·
IF 10.041
Minghao Ni,Ming Gong,Xiang Li,Jinlou Gu,Bo Li,Ye Chen
Metal-organic frameworks (MOFs) have attracted significant attention thanks to their excellent physical and chemical properties. Metal-organic frames are widely used in optics. For example, metal-organic frameworks can be used in fluorescent probes to detect and treat diseases, and can also be used to make solid-state light-emitting devices. Considering the high stability and easy synthesis of Zr-based UiO-66 MOF as well as the strong fluorescent emission of porphyrin molecules, the TCPP-incorporated UiO frameworks would inherit these advantages and exhibit intriguing optical performance. Therefore, in this paper, TCPP was doped into UiO-66, and the optical properties of the resulting MOF structure were observed. To obtain the optimal doping condition, three doping concentrations of TCPP were used. Besides the structural and morphological characterization by X-ray diffraction and scanning electron microscopy, more attentions have paid on the optical testing based on absorption and fluorescence spectroscopy, two-photon fluorescence spectroscopy and time-resolved spectroscopy. As a result, the TCPP-doped MOFs exhibited good fluorescence properties and satisfied our previous expectations of nonlinear optical properties and two-photon absorption. This work would pave a new way in constructing various MOFs-based solid-state devices with widespread optical applications.
研究领域:
材料科学
·
光学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Shabab Hussain,Xinyi Wan,Zhuoyi Li,Xinsheng Peng
The major obstacle in membrane filtration technology is the membrane fouling, which not only decreases the membrane efficiency, but also enhances its operational cost. In order to fabricate a membrane with antifouling characteristics, potential nanofillers have been added to the engineering polymer(s) to make a composite to improve the membrane efficiency. Herein, we incorporate porphyrin-based ultrathin, highly ordered porous photothermal responsive copper tetrakis(4-carboxyphenyl)porphyrin (Cu-TCPP) nanosheets as a novel nanofillers into the polysulfone (PSf) matrix. High loading (6 wt%) and well dispersed Cu-TCPP nanosheets incorporated polysulfone nanocomposite (Cu-TCPP/PSf) ultrafiltration membranes are prepared via non-solvent induced phase inversion. The Cu-TCPP/PSf composite membranes demonstrate pronounced antifouling and antibiofouling potential along good separation performance. The nanocomposite membranes demonstrate photo-induced pore tuning due to the local heating of photothermal Cu-TCPP nanosheets by visible light, which further improves the membrane separation efficiency. The Cu-TCPP/PSf composite membrane with 6 wt% Cu-TCPP nanosheets enhances the pure water permeance from 23.42 to 260.61 L·m −2 ·h −1 ·bar −1 , with improved antifouling potential, precise permeance recovery ratio of 99.13% after three cycles, and good separation performance for 100 and 200 nm particles. Considering relatively moderate cost, facile processing, tunable porosity, durable and good mechanical strength along restrained swelling, the Cu-TCPP/PSf membranes are considered as potential candidate as antifouling/antibiofouling ultrafiltration membranes for water purification.
研究领域:
材料科学
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环境工程
·
膜技术
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DOI
高影响因子
ANALYST
·
2024
·Vol. 149
·期 24
·5784-5790
·
IF 3.6
Yi-Xuan Li,Yu-Xuan Dai,Ju-Zheng Wang,Jérome Chauvin,Xue-Ji Zhang,Serge Cosnier,Robert S. Marks,Dan Shan
The concentration of zinc ions in semen is significantly correlated with sperm viability and male fertility. In this work, a reliable ratiometric fluorescence probe (ZIF-9-TCPP) based on the efficient Förster resonance energy transfer (FRET) process between two luminophores, benzimidazole (BIM) and meso-tetra (4-carboxyphenyl) porphyrin (TCPP) for Zn2+ detection has been constructed, where the emissions of BIM and TCPP are used as reference and detection signals. The proximity of BIM and TCPP in one framework (ZIF-9-TCPP) and the overlapped spectra between BIM and TCPP afford the attainment of a highly efficient FRET (around 90% efficiency). Efficient FRET improves the fluorescence intensity of porphyrin to enhance the sensitivity of detection. The unique spectral shift resulting from Zn2+ binding to the porphyrin ring ensures the selectivity of detection. In addition, the response mechanism of the proposed ratiometric probes to Zn2+ has been investigated. This work provides a convenient way to design an efficient FRET system and a promising method for sperm mobility detection.
研究领域:
生物化学
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生殖医学
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分析化学
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DOI
PubMed
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 34
·4331-4337
·
IF 3.1
Xin Xiao,Wenchun Liao,Rao Ma,Long Huang,Yunhui Yang
In this work, a highly sensitive colorimetric sensing platform was designed for the detection of trichlorfon based on inhibiting thiocholine (TCh)-induced redox reaction. 5,10,15,20-Tetracarboxyphenylporphyrin (TCPP) functionalized CuCo2O4 (TCPP–CuCo2O4) was synthesized to construct a colorimetric sensing platform for trichlorfon. In the presence of H2O2, TCPP–CuCo2O4 can oxidize colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into blue ox-TMB, accompanied by a strong absorption peak at 652 nm, while acetylcholinesterase (AChE) can specifically hydrolyze acetylthiocholine (ATCh) into TCh, which can reduce ox-TMB back into colorless TMB, resulting in a lower absorbance at 652 nm. Trichlorfon can irreversibly inhibit the activity of AChE and thus recover the absorption peak. Under the optimized conditions, detection of trichlorfon has a wide linear range of 40–4000 ng mL−1 with a linear correlation coefficient of 0.9904. The proposed method can be applied to the detection of trichlorfon in vegetables and has good application prospects.
研究领域:
分析化学
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环境科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2021
·
IF 3.882
Shabab Hussain,Xinyi Wan,Zhou Fang,Xinsheng Peng
Separation and purification of surfactant-stabilized oil-in-water nanoemulsions is a great environmental challenge. Membrane-based separation strategies are more effective over conventional methods in the treatment of nanoemulsion waste water. In this paper, we construct a superhydrophilic membrane by coating a thin photothermal-responsive iron tetrakis(4-carboxyphenyl)porphyrin (Fe-TCPP) nanofibrous metal organic framework (MOF) selective layer on a macroporous polyethersulfone membrane. The as-prepared membrane exhibits high separation performance of oil-in-water nanoemulsions with permeance of 46.4 L·m–2·h–1·bar–1 and separation efficiency of 99%. It also demonstrates nice anti-oil/ionic-fouling property, good recyclability, and desirable stability. The high separation performance is accredited to the superhydrophilicity, highly charged surface, and nanometer pore sizes of the Fe-TCPP nanofibrous membrane. Due to the unique photothermal property of Fe-TCPP nanofibers, the permeance can be enhanced more than 50% by visible light without deteriorating the rejection. This photo-stimuli MOF-based thin-layer membrane offers great potential for the generation of point-of-use water treatment devices.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
Materials
·
2022
·Vol. 15
·期 13
·4625
·
IF 3.748
Liudi Ji,Qi Wang,Lianhui Peng,Xiaoyu Li,Xiaoming Zhu,Peng Hu
It is quite important to develop sensitive, simple, and convenient methods for the simultaneous determination of Hydroquinone (HQ) and Catechol (CC) due to their wide existence, the difficulty of degradation, and the high toxicity. Herein, Cu-TCPP nanosheets were prepared inN,N-dimethylformamide (DMF) through the solvent exfoliation method. The morphology and electrochemical performance of Cu-TCPP were characterized, revealing its stacked sheet structure with abundant pores, a fast electron transfer ability, and a large electrode active area. Using Cu-TCPP nanosheets as the sensitive material to modify the glassy carbon electrodes (Cu-TCPP/GCEs), it was found that they had an obvious enhancement effect on the electrochemical oxidation currents of HQ and CC. The signal enhancement mechanism was explored. The Cu-TCPP nanosheets not only enhanced the accumulation abilities of HQ and CC, but also improved their apparent catalytic rate, displaying high sensitivity for HQ and CC. The values of the detection limit were calculated to be 3.4 and 2.3 nM for HQ and CC. A satisfactory recovery was obtained when this method was used in measuring HQ and CC in the water samples.Keywords:hydroquinone;catechol;electrochemical sensor;Cu-TCPP;2D MOFs
研究领域:
环境科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yiran Wang,Xiaolong Sun,Yufeng Zhou,Jiachen Liu,Huayue Zhu,Ru Jiang,Yingjie Miao,Yongqian Fu
Quercetin (QCT) is a flavonoid with significant health benefits, necessitating sensitive detection methods for food safety and quality control . This study presents a novel UiO-66-TCPP ratiometric fluorescent probe for the quantitative and visual detection of QCT. Under optimal conditions, the fluorescence intensity of UiO-66-TCPP decreased linearly with increasing QCT concentration, with a detection limit of 26 nM. The probe demonstrated high specificity, showing no significant interference from various substances and QCT analogues. Practical applicability was confirmed by testing artificially contaminated juice samples, achieving recovery rates between 98.0% and 104.8%. Furthermore, a paper-based sensor was developed by incorporating UiO-66-TCPP onto Whatman#1 chromatography paper . This sensor exhibited stable fluorescence and a reliable, sensitive visual response to QCT concentrations, detectable via a smartphone-based color recognizer application. The UiO-66-TCPP ratiometric fluorescent probe provides a sensitive, specific, and practical method for detecting QCT in food matrices, offering significant potential for both laboratory and on-site applications.
研究领域:
分析化学
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食品安全
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材料科学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）