COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Ping Qi,Liangying Jia,Mengjiao Yi,Enzhi Zhao,Yihan Liu,Aixin Song,Jingcheng Hao
Stabilized G-quadruplex systems have focused on biosensors , chromogenic reaction and chemiluminescence (CL) catalysts. On the present, the main studies are building stable G-quadruplexes to form ionogels and improving the performance of circularly polarized luminescence (CPL) or fluorescence resonance energy transfer (FRET). Here, the uncommon G-quadruplexes promoted by deep eutectic solvents (DESs) were established and used for chemiluminescence resonance energy transfer (CRET) platform. The DES containing choline chloride and urea not only provided solvent environment for guanosine but also facilitated the formulation of the aggregates. The ion-dipole interaction among the cation of choline chloride and guanosine gave rise to the G-quartets and the hydrogen bond networks in DES or π-π interaction maintained the stacking G-quartets being G-quadruplexes. Being bound to the hemin endowed G-quadruplexes peroxidase-like properties, which catalyzed the oxidation of luminol and generated expected chemiluminescence. Subsequently, attaching the luminol and fluorescent dyes to the peroxidase-like G-quadruplex/hemin complexes guaranteed the proximity requirements of CRET donor and acceptor. The CRET eutectogels could flash evident blue, chartreuse or cerise light once they were immersed into H 2 O 2 solution, which endowed the eutectogels ability in grouping displaying objects. This work demonstrated the feasibility of simultaneously fixing the donor and acceptor of energy transfer on G-quadruplexes to develop the CRET platform, taking the luminol and dyes as example. And the instant luminescence property expanded the application of eutectogels in pattern visualization field.
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高影响因子
Catalysts
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2022
·Vol. 13
·期 1
·81
·
IF 4.501
Ying Zhang,Junya Liao,Hao Liang
DNA-based biomimetic enzymes have attracted extensive attention due to their unique structure and stability compared to natural enzymes. Meanwhile, the specific sequences of DNA itself also have a catalytic effect. Herein, we first designed three guanine-rich DNA sequences numbered c−Myc3c, PG4TC, and TTT to construct g−quadruplex/hemin DNAzymes. Then, the g−quadruplex/hemin DNAzymes with the best activity were selected by a comprehensive examination of activity, degradation rate, and affinity. Subsequently, the stability and reusability of UiO66−DNAzymes were investigated using UiO66 as the carrier to immobilize DNAzymes. The results showed that UiO66−DNAzymes had excellent reusability and stability. Finally, UiO66−DNAzymes were successfully used for glucose detection by cascading with glucose oxidase (GOx) with a detection limit of 0.62 μM. The constructed glucose sensor had a good specificity, which is of great significance for developing a novel, accurate, fast, and economical glucose detection sensor.Keywords:metal-organic frameworks;DNAzymes;enzyme immobilization;biomimetic enzymes;glucose detection
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2019
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IF 2.931
Tao Wang,Xiqing Liu,Qiuyue Men,Wei Ma,Zhi Liu,Yang Liu,Changchang Ma,Pengwei Huo,Yongsheng Yan
In this work, a simple method to load of g-C 3 N 4 quantum dots (CN QDs) onto Bi 2 Ti 2 O 7 (BTO) microsphere with the amount of CN QDs (3, 7, 10 and 15%). The photocatalyst was used for the treatment of water pollutants under visible-light illumination, which proved that CNBTO composites showed improved photocatalytic activity matched up to pure BTO. Reformation of BTO with CN QDs enhanced the light assimilation capacity, and promoted the isolation of photo-induced electron-hole pairs. The trapping experiments and ESR were announced the holes (h + ) and superoxide oxide (O 2 − ) played the key role, and the relative mechanism of the photocatalytic process was proposed. Meanwhile, the effects of CN QDs content, pH and initial pollutant concentration on the removal efficiency of ciprofloxacin (CIP) were studied. Results showed that the CN QDs loaded on BTO presented higher photocatalytic efficiency, and an optimum value for the dosage of photocatalytic in pH 8.0.
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
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2017
·
IF 4.857
Molin Zhou,Xin Jiang,Xingxing Jiang,Ke Xiao,Yangwu Guo,Hongwei Huang,Zheshuai Lin,Jiyong Yao,Chen-Ho Tung,Li-Zhu Wu,Yicheng Wu
A new Au-based sulfide BaAu2S2 was obtained through solid-state reaction. It crystallizes in the tetragonal space group I41/amd with unit cell parameters of a = 6.389 72(2) Å, b = 6.389 72(2) Å, c = 12.7872(1) Å, and Z = 4. Its structure features [AuS2/2]∞ zigzag chains composed of corner-sharing AuS2 linear units. With a direct band gap of 2.49 eV, BaAu2S2 is suitable for the visible-light harvesting. Moreover, it exhibits excellent visible-light photocatalytic activity, which is 1.3 times that of graphitic carbon nitride (g-C3N4) and also demonstrates excellent circulating stability. On the basis of the crystal and electronic structure analysis, the electrons are highly delocalized along the [AuS2/2] chains, and the electron effective mass of BaAu2S2 is only approximately one-fifth of that of g-C3N4, which may help the separation of the electron/hole pairs during the photocatalytic process. Additionally, the absorption coefficient of BaAu2S2 is extremely high, exceeding 1 × 104 cm–1 over the entire absorbable visible spectrum (hν > Eg), which is significantly higher than that of g-C3N4. Such factors may contribute to its outstanding photocatalytic performances. According to our best knowledge, BaAu2S2 is the first noble metal-based chalcogenide photocatalyst reported as intrinsic light-harvesting and electron/hole-generating centers. This study may provide valuable insights for further research on photocatalytic materials.
研究领域:
材料科学
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光催化
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RSC Advances
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2016
·Vol. 6
·期 28
·23693-23701
·
IF 3.289
Jiulong Zhang,Kang Chen,Ying Ding,Xiu Xin,Wenpan Li,Mengjun Zhang,Haiyang Hu,Mingxi Qiao,Xiuli Zhao,Dawei Chen
pH-Sensitive copolymers have been widely used in drug delivery systems to selectively enhance drug release at tumor sites. Herein, dextran (DX) was conjugated with poly(lactide-co-glycolide) (PLGA) and histidine (His) to prepare a pH-responsive nanocarrier, dextran-g-poly(lactide-co-glycolide)-g-histidine (HDP) micelles, for the delivery of antitumor drugs. Different grafting ratio HDP micelles were synthesized and prepared successfully and confirmed by the critical micelle concentration (CMC) and particle size distribution (PSD). In vitro drug release showed that the release behaviour of paclitaxel (PTX) loaded HDP micelles was pH-dependent. All blank micelles were nontoxic in the in vitro cytotoxicity assay. In an MTT assay, PTX-loaded HDP micelles with medium grafting ratios (MHDP) showed the highest cytotoxicity against MCF-7 cells. Cellular uptake experiments revealed that these pH-sensitive micelles could be taken up effectively and PTX could be delivered into the cytoplasm to reach the antitumor effect. NIR fluorescence imaging experiments demonstrated that HDP micelles could specifically accumulate in tumor sites via enhancing the permeability and retention (EPR) effect to reduce their systematic toxicity. In vivo antitumor activities showed that HDP micelles could effectively inhibit tumor growth and prolong survival time compared with free PTX solution. These results confirm that the biocompatible pH-responsive HDP micelles are a novel nanocarrier for the intracellular delivery of PTX.
研究领域:
药剂学
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高分子化学
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癌症研究
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药物递送系统
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Junchao Qin,Yingying Jiao,Mingquan Liu,Yike Li,Jianshe Wang
Heat treatment strategy has been initially used to prepare boron doped graphite carbon nitride nanodots (BCNDs)/carbon-rich g-C 3 N 4 nanosheets (CNS) heterojunction catalysts. The overall procedure involved three stages. First, BCNDs were prepared by the molten salt method. Next, BCNDs were dispersed onto CNS via heat treatment. Finally, the prepared heterojunction catalysts were test for photocatalytic water splitting hydrogen evolution . The experiment results show that the highest photocatalytic hydrogen evolution activity reached 6260.5 µmol·g −1 ·h −1 , which was approximately 15.7, 7.2 and 3.1 folds higher than that of bulk carbon nitride (bulk C 3 N 4 ), CNS and BCNDs/CNS-H prepared by hydrothermal method , respectively. The enhanced photocatalytic performance may be attributed to the synergistic effect of the formation of heterojunction and the increase of C content in carbon nitride. This work provides reliable guideline for the design of a novel and simple method for composite photocatalyst .
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高影响因子
APPLIED SURFACE SCIENCE
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2021
·
IF 6.707
P. Velusamy,M. Sathiya,Yunpeng Liu,Shanhu Liu,R. Ramesh Babu,Mohamed Aly Saad Aly,E. Elangovan,Haibo Chang,Liqun Mao,Ruimin Xing
A two-step thermal poly-condensation and hydrothermal method is used to prepare noble metal-free nano-heterostructure of neodymium (Nd)-doped graphitic carbon nitride (g-C 3 N 4 ) and bismuth oxyiodide (BiOI). The synthesised Nd- doped g-C 3 N 4 /BiOI heterostructure shows high electron-hole separation. Moreover, a fast charge transport at the heterojunction is noted and further leads to low charge recombination rate. Consequently, the synthesised heterostructure overcomes the high charge recombination rate of g-C 3 N 4 . This work reports the effect of Nd- doping and the formed heterojunction on the structural, optical, electrical conductivity and photoelectrochemical (PEC) properties of the heterostructure. Moreover, introducing Nd dopant into g-C 3 N 4 enhances visible light absorption of g-C 3 N 4 . The optimal hetero-nanostructure (5.0 wt% Nd doped g-C 3 N 4 /BiOI) shows high photocurrent density (15.50 mA/cm 2 ) and hydrogen evolution rate (288 μmol h −1 cm −2 ) under visible light (λ ≥ 420 nm) illumination when compared to other wt.% of Nd doped g-C 3 N 4 and heterostructure. Additionally, the low emission features obtained from the photoluminescence studies and the heterojunction visually observed by HRTEM strongly emphasise that the formation of heterostructure leads to low recombination of charge carriers. Doping and forming heterostructure is shown to be an effective, controllable and an optimal approach to improve the PEC water splitting performance of g-C 3 N 4 .
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Shuo Wang,Guangshe Li,Taotao Huang,Chang Liu,Xinbo Li,Qian Zhang,Yongcun Zou,Liping Li
The interface of substances at high temperature is completely different from that at room temperature, which gives a chance to create some unprecedented physical and chemical properties. These interface-dominated properties can significantly improve the carrier transport kinetics. In this paper, we report on the synthesis of heterogeneous catalysts involving P doped g-C 3 N 4 and SnO 2 , providing a first example of using high temperature interfacial chemistry to create P-Sn bonds between thermo-soften two-dimensional substance and hard oxide. Nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS) data confirmed the presence of P-Sn bonds in the heterogeneous catalysts of P doped g-C 3 N 4 and SnO 2 during the rapid thermal quenching process. Owing to the promoted fast separation of photogenerated carriers, P-Sn bond enriched catalyst exhibits the best Cr(VI) photoreduction performance among the g-C 3 N 4 -based photocatalysts ever reported. Even at high Cr(VI) concentrations (at 500 ppm), this catalyst retains a high catalytic activity as well as good stability. High temperature interface chemistry produced by thermal quenching process will provide a universal methodology for constructing interfacial bonds and guiding the synthesis of new interfacial functional materials.
研究领域:
材料科学
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环境科学
·
物理化学
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高影响因子
Sustainable Chemistry and Pharmacy
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2023
·
IF 6
Dong Liang,Xiaoyu Zhang,Yanle Li,Yumiao Zhou,Mengyu Ren,Xiaoyue Zhang,Yongxiang Li,Na Zhu
An energy-saving and friendly process was performed on the Ag/g-C 3 N 4 photocatalyst to achieve the halo-nitro-phenol intermediates with the ipso -nitration of bromophenols and nitrite. As detected by SEM , TEM and XRD , Ag nanoparticles are proved to be located on the surface of g-C 3 N 4 and lead to the improvement of photocatalytic ability by UV–vis, PL spectra and photoelectronic analysis. The substituents of bromophenols could be immediately related to their regioselective conversion. The fluoro-, chloro-, and bromo-substituted bromophenols revealed the higher nucleophilic potential than the alkyl- and alkoxyl-substituted ones. From the inhibition experiment and EPR analysis, the photo-generated superoxide and active holes played crucial roles in photocatalytic nitration through the peroxynitrite way into ·NO 2 radicals. Finally, the electrostatic potentials of all bromophenols were calculated on Gaussian09 W software to explain the distribution of photo-driven nitration products.
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JOURNAL OF HAZARDOUS MATERIALS
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2021
·
IF 10.588
Qian Feng,Yabo Sun,An Li,Xiangang Lin,Tao Lu,Dan Ding,Menghan Shi,Yingqiang Sun,Yupeng Yuan
Booming graphitic carbon nitride (g-C 3 N 4 ) photocatalyzed water splitting increases crisis of aquatic contamination. However, a controversial understanding regarding effect of g-C 3 N 4 on growth of microalgae still exists. Accordingly, Chlorella vulgaris were cultured in 0–250 mg/L of g-C 3 N 4 with biomass named as C-0, C-50, C-100, C-150, C-200, and C-250, respectively. g-C 3 N 4 below 200 mg/L was beneficial to short-term cultivation of microalgae, while it was harmful to long-time cultivation. Protein factions of C-0, C-100, and C-250 were 41.4, 42.3, and 36.4 wt%, while their lipid factions varied from 21.5, 16.9, to 17.8 wt%, respectively. In short-term cultivation, superoxide dismutase’s activity of C-0, C-150, and C-250 increased dramatically, while accumulated H 2 O 2 led to increased activity of catalase . However, it started to decrease once antioxidant enzymes were per-oxidized, leading to increase of malondialdehyde content. In long-term cultivation, activities of superoxide dismutase, catalase and malondialdehyde content decreased dramatically owning to peroxidation of algae. Scavenger tests with tertiary butanol and triethanolamine implied that·OH was dominate parameter affecting growth of microalgae. This work indicates that g-C 3 N 4 below 200 mg/L is propitious to short-term cultivation of microalgae, while it is bad to long-time cultivation of microalgae, revealing dual rules of g-C 3 N 4 in Chlorella vulgaris cultivation.
研究领域:
环境科学
·
微生物学
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PubMed
高影响因子
Nanoscale Research Letters
·
2016
·Vol. 11
·期 1
·1-9
·
IF 2.584
Li Huihui,Yin Shu,Sato Tsugio,Wang Yuhua
Graphitic-C 3 N 4 (g-C 3 N 4 ), a low-cost visible-light-driven photocatalyst, was used for the photocatalytic oxidation of aqueous methylene blue (MB) in the dark with Sr 4 Al 14 O 25 :(Eu,Dy) assistance. The Sr 4 Al 14 O 25 :(Eu,Dy)/g-C 3 N 4 photocatalysts were fabricated through the ultrasonic dispersion method. The commercial Sr 4 Al 14 O 25 :(Eu,Dy) phosphor was used as a long afterglow supplier for exciting g-C 3 N 4 in the dark. The results demonstrated that the metal-free g-C 3 N 4 photocatalyst could use the eye-visible long afterglow to photocatalytically decompose MB dyes in the dark. This work may expand the appealing application of g-C 3 N 4 for the environmental cleanup.
研究领域:
材料科学
·
环境催化
·
光催化
·
功能材料
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高影响因子
Royal Society Open Science
·
2019
·Vol. 6
·期 3
·
IF 2.515
Shijie Shen,Wenwu Zhong,Zongpeng Wang,Zhiping Lin,Shangshen Feng
A series of β-FeSe nanorods composited g-C3N4 were prepared. The structure, morphology, chemical state, photocatalytic activity, electrochemical impedance and photoluminescence of β-FeSe/g-C3N4 composites were well characterized. It is found that the decolourization rate of 3 wt% β-FeSe/g-C3N4 composites reaches 4.4 times than that of g-C3N4. The improved photocatalytic properties could be ascribed to the reduced recombination of photogenerated electrons and holes, which is derived from the excellent ability of β-FeSe to capture and transfer electrons. This work provides an alternative co-catalyst for decolourizing organic matter.
研究领域:
材料科学
·
光催化
·
纳米材料
·
环境化学
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高影响因子
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