CHEMICAL PHYSICS LETTERS
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2021
·
IF 2.328
Jingwei Gong,Yanzhu Guo,Jie Lu,Yi Cheng,Haisong Wang
Carbon quantum dots/titanium dioxide (CQDs/TiO 2 ) nanocomposites were synthesized with TEMPO oxidized cellulose as carbon source via a facile method. In this eco-friendly system, the photocatalytic activity of CQDs/TiO 2 were evaluated through photo-degradation of methylene blue (MB) under visible light. The results show that CQDs/TiO 2 composites possess high photocatalytic degradation efficiency up to 92%. The enhanced degradation efficiency of MB was probably attributed to that the photoelectrical properties of CQDs can lead to effective separation of photo-generated electrons-holes pairs. Moreover, the TEMPO oxidized cellulose has abundant amino groups, which can significantly improve the photophysical properties of CQDs.
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高影响因子
ACS Applied Materials & Interfaces
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2021
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IF 9.229
Guolin Zheng,Yifan Cui,Yu Zhou,Zhe Jiang,Qiang Wang,Man Zhou,Ping Wang,Yuanyuan Yu
Enzymes as biocatalysts have attracted extensive attention. In addition to immobilizing or encapsulating various enzymes for combating the easy loss of enzymatic activity, strengthening the enzymatic activity upon light irradiation is a challenge. To the best of our knowledge, the work of spatiotemporally modulating the catalytic activity of artificial-natural bienzymes with a near-infrared light irradiation has not been reported. Inspired by immobilized enzymes and nanozymes, herein a platinum nanozyme was synthesized; subsequently, the platinum nanozyme was grafted on the body of laccase, thus successfully obtaining the artificial-natural bienzyme. The three-dimensional structure of the artificial-natural bienzyme was greatly different from that of the immobilized enzyme or the encapsulated enzyme. The platinum nanozyme possessed excellent laccase-like activity, which was 3.7 times higher than that of laccase. Meanwhile, the coordination between the platinum nanozyme and laccase was proved. Besides, the cascaded catalysis of artificial-natural bienzyme was verified with hydrogen peroxide as a mediator. The enzymatic activities of artificial-natural bienzyme with and without near-infrared light irradiation were, respectively, 46.2 and 29.5% higher than that of free laccase. Moreover, the reversible catalytic activity of the coupled enzyme could be manipulated with and without a near-infrared light at 808 nm. As a result, the degradation rates of methylene blue catalyzed by the coupled enzyme and the platinum nanozyme were higher than that of laccase. Furthermore, accelerating polymerization of the dopamine was also demonstrated. Briefly, this facile strategy may provide a universal approach to control the catalytic activity of other natural enzymes.
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Chengli Zhang,Xun You,Yuliang Li,Yuanyuan Zuo,Wei Wang,DanDan Li,ShengWei Huang,Hangzhi Hu,Feng Yuan,Fuqiang Shao,Minggang Yin
In this work, an aptamer was used as an identifying molecule and a novel amplification strategy based on Ce-MOF and m-PdNFs-G4-MBs for the sensitive detection of dopamine (DA) is demonstrated. Notably, a novel dopamine aptamer with higher affinity and specificity was chosen, and the PdNF was functionalized with MB via embeddedness and surface decoration for enhancing the intensity of electrochemical signal. The synthesized m-PdNFs-G4-MBs nanocomposite not only acts as the electrochemical indicator but also to label single-stranded DNA (S2) to acquire signaling probes (m-PdNFs-S2-G4-MBs) as a nanocarrier . Besides, an -NH 2 modified single-strand DNA (S1) is designed, and form an S1-AP double-strand by annealing reaction with aptamer (AP), then the S1-AP is fixed on the Ce-MOF surface, decorated on electrode. In the presence of DA, DA bind to the AP and S1 regain single-stranded structure. And then, the single-stranded S1 recognizes m-PdNFs-S2-G4-MBs and captures them, ultimately producing an enhanced electrical signal. Due to the extraordinary conductive performance of Ce-MOF and the signal amplification of m-PdNFs-S2-G4-MBs, the new detection platform achieves a minimum detection limit to 6 pmol/L for DA and with a good specificity. Prominently, the results obtained from our platform for serum DA detection are highly consistent with the UPLC-MS method. These results suggest that this new platform has the potential to provide a convenient and efficient tool for the diagnosis of multiple neurological disorders in the future. This work also provides a good strategy for the construction of other biomolecule sensors.
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Journal of Water Process Engineering
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2023
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IF 7
Yang He,Jing Li,Chunyan Liu,Liang Zhao,Zhaoxiang Wang,Jingyi Yang,Lihua Zhou,Shaohua Gou
The composite of montmorillonite (Mt) and novel imidazolium-functionalized carboxylate-based polyelectrolyte (P(NaAA/VIC)) was formed through the bridging interaction of zwitterionic groups, enabling efficient and rapid removal of industrial cationic dye methylene blue (MB) from aqueous solution. The removal rate of pure P(NaAA/VIC) was difficult to reach 90%, while P(NaAA/VIC)/Mt composites achieved the removal rate of more than 95%. The substantial improvements of removal rate were attributed to the formation of larger adsorbed aggregates, facilitating easy separation. Importantly, Mt laminae, as a rigid structure, could effectively prevent molecular chain of polyelectrolyte curling due to electrostatic shielding after adsorption, which made the adsorption sites play a full role, thus enhancing the adsorption efficiency. The maximum adsorption capacity of composite (80 wt% P(NaAA/VIC) and 20 wt% Mt) was increased by about 20% compared with pure P(NaAA/VIC). And the excessive zwitterionic groups in polyelectrolyte would lead to a decrease in adsorption capacity. The systematic investigation revealed that the adsorption was a spontaneous exothermic process driven by electrostatic interactions, conforming to the pseudo-second-order kinetic model, in which the adsorption was monolayer coverage. The composite can achieve an high adsorption capacity of 1381.7 mg/g at 20 °C, demonstrating enormous potential in the treatment of cationic dye wastewater.
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CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Chenyue Mao,Hua Lei,Zhiyu Guo,Xuchao Jia,Xiaodong Cui,Jiawei Huang,Linfeng Fei,Yanmin Jia,Wanping Chen
As tribo-catalysis gains increasing attention to harness mechanical energy for environmental remediation, it is time to explore its application to those organic pollutants that have been challenging to degrade. In this study, four commercial metal oxide nanoparticles , BaTiO 3 , ZnO, P25 TiO 2 , and DXN-RT30 TiO 2 nanoparticles, were stimulated through magnetic stirring to degrade 20 mg/L methyl orange (MO) and 30 mg/L methylene blue (MB) solutions. While all the other nanoparticles showed rather poor performance, DXN-RT30 TiO 2 nanoparticles performed exceptionally well: With Teflon magnetic disks rotating at 400 rpm, 98.2% of MO and 100% of MB were degraded within 330 and 420 min, respectively. DXN-RT30 TiO 2 nanoparticles demonstrated a unique absorption for MB molecules, yielding significantly different outcomes in active species trapping experiments between degradation of MO and MB solutions by DXN-RT30 TiO 2 . Complemented by electron paramagnetic resonance analysis, our findings suggest that for DXN-RT30 TiO 2 nanoparticles under magnetic stirring, MO molecules are degraded by h + , ·OH, and e − in solution, while MB molecules are absorbed and degraded via h + and e − on the surface of DXN-RT30 TiO 2 nanoparticles. This study identifies DXN-RT30 TiO 2 nanoparticles as a cost-effective, high-performance, and environmentally friendly tribo-catalyst for environmental remediation, stimulating further exploration for more excellent tribo-catalysts.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Qiang Yao,Jing Guo,Fucheng Guan,Jia Li,Da Bao,Jiahao He,Xinbin Ji,Xuecui Song,Qiang Yang
In order to improve the adsorption performance of MoS 2 , as well as to solve the problems of MoS 2 -powder in adsorption, which is prone to agglomeration and difficulty to be recycled, we prepared MoS 2 -nanoflowers(MoS 2 -NFs), and mixed them with sodium alginate/polyvinyl alcohol(SA/PVA) to prepare MoS 2 -NFs/SA/PVA xerogel(MSP) by freezing-lyophilization. Then two forms of xerogels - block-MSP(MSPB) and spherical-MSP(MSPS) were prepared, and they were used as methylene blue(MB) and Cu 2+ adsorbent. It was found that MoS 2 -NFs were evenly dispersed inside the SA/PVA with no agglomeration, while the interior of MSPB/MSPS showed the structure of parallel-pores and radial-pores, respectively. The adsorption capacity of MSPB/MSPS on MB can reach 233 mg/g, which is five times higher than SA/PVA-gel, showing excellent synergistic-adsorption effect, and the adsorption capacity for Cu 2+ reaches 271 mg/g. The adsorption mechanism indicated that the adsorption of MB by MSPB/MSPS conformed to pseudo-first-order model, with electrostatic force as the main force. And their adsorption of Cu 2+ conformed to pseudo-second-order model and was dominated by Lewis acid/base soft-soft interactions. Notably, after long-term adsorption, MSPB/MSPS maintains its shape and more than 90 % of the adsorption capacity, ensuring the recovery and reuse of materials. So, MSPB/MSPS has great potential in adsorption, providing a new solution for sewage purification .
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PubMed
高影响因子
International Journal of Electrochemical Science
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2023
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IF 1.5
Yong Chang,Fengli Gao,Tong Wu,Qiuzhi Pan,Lin Liu,Qijun Song
Protein kinases play a vital regulatory role in various biological processes. In this work, we developed an electrochemical biosensor for the detection of protein kinases using methylene blue (MB)-functionalized Zr-based metal-organic frameworks (MOFs, UiO-66-NH 2 ) as the signal labels. The results of UV-Vis spectroscopy, X-ray diffraction and N 2 adsorption–desorption experiments confirmed the successful encapsulation of MB into UiO-66-NH 2 . The phosphate groups in phosphorylated peptides were recognized by UiO-66-NH 2 via the robust coordination with Zr-O clusters on the surface of MOFs. The encapsulated MB molecules in UiO-66-NH 2 produced a strong electrochemical signal for highly sensitive detection of protein kinases, which was recorded by square wave voltammetry (SWV). With protein kinase A (PKA) as a model target, the biosensor achieved a detection limit of 0.02 U/mL and a linear range from 0.05 to 20 U/mL. The proposed biosensor was utilized to screen potential inhibitors and determine PKA in serum samples with satisfactory results. This work provided an effective strategy for electrochemical assays of phosphorylation-related biological events in clinical diagnosis.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Fengjiao Duan,Chenchen Liu,Xiaocan Liu,Lingling Wang,Shuai Zhang,Xiaobo Liu
In recent years, metal ions have been cross-linked with composite to improve their adsorption capacity, which has a wide range of applications in environmental treatment, biomedicine and other fields. In this work, Fe 3+ was complexed with block polyarylene ether nitrile (PEN) to form regular cubic blocks, which provided sufficient sites for the attachment of TiO 2 . Four types of PEN-Fe 3+ @TiO 2 hybrid cubes were successfully prepared by changing the content of TiO 2 . The adsorption and photocatalytic degradation properties of PEN-Fe 3+ @TiO 2 were evaluated by UV-Vis spectrophotometer. The results showed that the adsorption capacity of PEN-Fe 3+ @TiO 2 increased with the increase of TiO 2 , and the maximum adsorption capacity and the photocatalytic degradation ratio reached 914.42 mg/g and 99%, respectively. The effect of pH on the adsorption capacity was further studied and it was found that the PEN-Fe 3+ @TiO 2 composites showed better adsorption property under alkaline conditions. Moreover, the adsorption kinetic fitting showed that the whole adsorption process obeyed the pseudo-second-order kinetic model, which indicated that the adsorption process was dominated by chemical adsorption .
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Journal of Water Process Engineering
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2020
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IF 3.465
Lixin Li,Jie Wang,Chao Jia,Ying Lv,Yan Liu
Cyanobacteria and plastics, as the two major problems of the water environment crisis, need to be solved urgently. In particular, there is no reasonable method for simultaneously treating these wastes and recovering useful resources from them. Therefore, the mixture of cyanobacteria and polypropylene (PP) plastics is directly pyrolyzed at different activation conditions to synthesize the composite carbon (CPC) materials, which have excellent performance in water contaminant removal. The result indicates that the added PP is beneficial to improve the properties of CPC material, increasing its specific surface area and pore volume (up to 2811 m 2 /g and 1.992 cm 3 /g, respectively). The application performance of CPC materials is mainly determined by the surface area and pore volume. Therefore, the CPC materials exhibit a higher methylene blue (MB) adsorption (maximum 490 mg/g). This paper provides a new strategy for recycling wastes from water environment and new ideas for synthesizing high-performance composite materials.
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高影响因子
NANO
·
2020
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IF 1.566
Bin Chen,Jialu Zhang,Yan Zhang,Lijing Zhu,Haichao Zhao
Herein, carbon quantum dots (CQDs) and gold nanoparticles (Au NPs) were synthesized and deposited on the surface of Polysulfone (PSF) membrane using polydopamine as the sublayer, resulting in excellent antibacterial property and photocatalytic activity for degradation of organic dyes. Water contact angle (WCA) of the membrane before and after surface modification dropped from 9 3 . 9 ∘ to 5 8 . 4 ∘ , due to outstanding hydrophilicity of CQDs. The antibacterial test against E . c o l i found that the CQDs/Au NPs were beneficial to improve the antibacterial property of the membrane, and the antibacterial rate could reach 90%, effectively prolonging the service life of the membrane. In addition, the adsorption of bovine serum albumin (BSA) molecules on the membrane was significantly reduced, and the irreversible fouling ratio also decreased from 41.3% to 10.7%. On the other hand, the CQDs/Au NPs layer was used as a photocatalytic material for degradation of methylene blue.
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FIBERS AND POLYMERS
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2020
·Vol. 21
·期 8
·1760-1766
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IF 1.797
Hu Jinyan,Wu Dingsheng,Feng Quan,Wei Anfang,Song Beibei
Currently, the preparation of novel efficient and recyclable photocatalysts for pollutant degradation in water has become a research hotpot. In this study, a TiO 2 -loaded non-woven polypropylene/bacterial cellulose (TiO 2 -loaded NPBC) composite film was prepared by a biological culturing method. The TiO 2 nanoparticles were spontaneously embedded into the prepared composite film. Then, the composite film was used to degrade methylene blue (MB) and its degradation effects were explored. The morphology of the composite film was investigated. It was clear that a large amount of TiO 2 nanoparticles were embedded into the composite membrane during the biological culturing method. The experimental results confirmed that the TiO 2 -loaded NPBC composite film had good degradation performance and reusability. When the reaction time was 120 min, the removal rate of MB by the film was 92.8 %. The removal rate remained above 85 % after 5 degradation cycles.
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JOURNAL OF POLYMER RESEARCH
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2020
·Vol. 27
·期 5
·1-12
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IF 2.426
Dai Zhong,Ren Penggang,Cao Qiping,Gao Xin,He Wenwei,Xiao Yizhou,Jin Yanling,Ren Fang
The hydrophobic TiO 2 /lignin based carbon nanofibers (TiO 2 @CFs) composite with high photocatalytic efficiency and excellent cycle performance is successfully prepared by the method of electrospinning and thermo-treatment. The results of FTIR, SEM and EDS analyses show that the TiO 2 nano-particles are uniformly and firmly coated on the surface of CFs. Due to good hydrophobicity and high electrical conductivity of CFs, such unique properties endow TiO 2 @CFs composites with enhanced light energy utilization efficiency and photocatalytic efficiency because of their floatability on the solution, high adsorptive capacity of MB, and low recombination of photo-generated electrons and holes. Compared with the commercial TiO 2 powder, the degradation rate toward MB of TiO 2 @CFs is improved about 2.62 and 3.02 times at 30 and 15 min, respectively, under static state and xenon lamp irradiation. The degradation rate of TiO 2 @CFs toward MB reaches 62.77% within 15 min under static state, and further increase to 87.28% after 30 min. In addition, the removal rate of MB can be obtained up to 91.5% even after four cycles at a stirring speed of 200 RPM. Therefore, these unique material structures make it become a promising photocatalytic material.
The TiO 2 /lignin lased carbon nanofibers composite with excellent photocatalytic performance, reusability and durability was prepared from a green and low-cost biomass materials of lignin by using the simple method of electrospining.
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危险品化学品经营许可证（带存储）