RSC Advances
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2021
·Vol. 11
·期 59
·37089-37102
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IF 3.361
Qianqian Shang,Yuzhen Fang,Xingliang Yin,Xiangjin Kong
Structure design of photocatalysts is highly desirable for taking full advantage of their abilities for H2 evolution. Herein, the highly-efficient TiO2{001}/g-C3N4 (TCN) heterostructures have been fabricated successfully via an in situ ethanol-thermal method. And the structure of g-C3N4 in the TCN heterostructures could be exfoliated from bulk g-C3N4 to nanosheets, nanocrystals and quantum dots with the increase of the synthetic temperature. Through detailed characterization, the structural evolution of g-C3N4 could be attributed to the enhanced temperature of the ethanol-thermal treatment with the shear effects of HF acid. As expected, the optimal TCN-2 heterostructure shows excellent photocatalytic H2 evolution efficiency (1.78 mmol h−1 g−1) under visible-light irradiation. Except for the formed built-in electric field, the significantly enhanced photocatalytic activity of TCN-2 could be ascribed to the enhanced crystallinity of TiO2{001} nanosheets and the formed g-C3N4 nanocrystals with large surface area, which could extend the visible light absorption, and expedite the transfer of photo-generated charge carriers further. Our work could provide guidance on designing TCN heterostructures with the desired structure for highly-efficient photocatalytic water splitting.
研究领域:
材料科学
·
能源化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Fan Fu,Jian Yang,Hao Xu,Yang Li,Shaobo Cao,Kang Da,Wenting Chen,Ximei Fan
Doping or constructing heterojunctions by coupling with other semiconductors are effective methods to improve the photocatalytic performance of graphitic carbon nitride (g-C 3 N 4 ) in toluene degradation. Herein, thermally condensed synthesized K-doped g-C 3 N 4 (KCN) is coupled with BiOCl via a hydrothermal method, and KCN/BOC heterostructures are obtained. The optimal KCN 1 /BOC heterojunction exhibits approximately 85% removal of toluene after 150 min irradiation under simulated solar light, which is 12.4 and 9.6 times higher than those of g-C 3 N 4 and BiOCl, respectively. The superior performance of KOH-modified g-C 3 N 4 is attributed to the electron transfer channels formed by the insertion of K + into the g-C 3 N 4 layers, which facilitate efficient charge separation and rapid electron transfer. Furthermore, the KCN/BOC heterostructure with the Z-scheme further improves the surface charge separation efficiency, which plays a critical role in the photocatalytic process. This work provides a facile and promising strategy for dual-strategy modification of g-C 3 N 4 to enhance photocatalytic degradation activity.
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
International Journal of Environmental Science and Technology
·
2020
·Vol. 17
·期 5
·3055-3064
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IF 2.54
Liu S.-S.,Luo D.-M.,Yang X.,Tong C.-X.,Tao L.-G.,Ding H.-P.,Zhang J.
A series of graphitic carbon nitrides (g-C 3 N 4 ) were prepared using different precursors; these g-C 3 N 4 -supported CoOx catalysts exhibited different catalytic performances in toluene catalytic combustion reaction. The structure of samples was detected by XRD, TEM, SEM, XPS, H 2 -TPR, nitrogen adsorption and desorption technique, to build up the structure–performance relationship and uncover the key property of g-C 3 N 4 that mostly influences the catalytic performance of CoOx/g-C 3 N 4 . CoOx with average particle size of 12.7 nm supported on g-C 3 N 4 prepared by dicyandiamide showed better catalytic performance than on other supports, 100% toluene conversion could be achieved at ~ 285 °C, characterization results showed that Co was directly connected with N, and the integrity of g-C 3 N 4 sheet affects the dispersion of CoOx; the content of sp 2 -N (within C=N–C structure) determines the interaction between g-C 3 N 4 and CoOx; these two factors together affect the performance of CoOx/g-C 3 N 4 catalysts in the catalytic combustion of toluene.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2015
·
IF 2.729
Xue Chen,Xiaoshu Zhu,Yinghong Xiao,Xiaodi Yang
A novel electrode material for supercapacitor composed of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT) and graphitic-phase C 3 N 4 (g-C 3 N 4 ) was prepared by a layer-by-layer assembly method. The resulting composite of PEDOT/g-C 3 N 4 represented excellent electrochemical stability in neutral electrolyte and enhanced electrochemical performance of capacitance and average energy density in comparison with single PEDOT. The specific capacitance was 137 F g −1 in H 2 SO 4 and 200 F g −1 in Na 2 SO 4 at a current density of 2 A g −1 , respectively. More significantly, the average energy density was 9.65 W h kg −1 at an average power density of 4001.86 W kg −1 in H 2 SO 4 . While in Na 2 SO 4 , the average energy density reached 17.5 W h kg −1 at an average power density of 5000 W kg −1 . More than 89% and 96.5% of capacitance were retained in H 2 SO 4 and Na 2 SO 4 respectively, suggesting that PEDOT/g-C 3 N 4 possessed an excellent cycling stability in view of capacity performance as electrode materials. The property improvement was attributed to the synergistic effects of the two components in the composite.
研究领域:
材料科学
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电化学
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DOI
高影响因子
ANALYTICAL SCIENCES
·
2017
·Vol. 33
·期 5
·585-590
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IF 1.228
Zhu Xiaoqian,Huang Min,Li Jiao,He Hanping,Zhang Xiuhua,Wang Shengfu
In this paper, a novel electrochemical sensor was developed for the rapid detection of G-G mismatched DNA based on hexaammineruthenium(III) chloride ([Ru(NH 3 ) 6 ]C l3 ) as a redox indicator. The sensor platform was constructed by immobilizing small molecules (NC-linker) on the gold electrode via amide bonds. The as-prepared NC-linker as the nucleic acids recognition molecule can interact with the G base of DNA. After the sensor was incubated with G-G mismatched DNA, the double-stranded DNA (dsDNA) acted as carriers of the signal tags-[Ru(NH3)6]Cl3, which resulted in a remarkable electrochemical signal. More binding of [Ru(NH 3 ) 6 ]C l3 led to increases of the electrochemical signal. Other mismatched DNA produced only a low response, as well as complementary DNA. Thus G-G mismatched DNA can be easily discriminated from other mismatched and complementary DNA based on the sensor. Furthermore, the method was simple, rapid and repeatable for the detection of G-G mismatched DNA. The selective detection of target dsDNA was achieved by a relative current ratio of the target and control DNA. These results demonstrated that this strategy could provide great promise for the rapid and specific detection of other sequence-specific DNA.
研究领域:
电化学
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分子生物学
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分析化学
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 21
·7353-7361
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IF 4.099
Zengyu You,Chenyan Wu,Qianhong Shen,Yang Yu,Hao Chen,Yuxuan Su,Hui Wang,Chunchun Wu,Fang Zhang,Hui Yang
An efficient and facile method to fabricate a surficial dispersive heterojunction based on the assembly of g-C3N4 nanoparticles was proposed. A p–n nano heterojunction composed of BiOI and g-C3N4 was constructed by simply loading g-C3N4 nanoparticles on flower-like BiOI nanosheets. The structure-dependent optical, electronic and photoelectric properties were investigated, and the structure–property relationship was discussed. The results show that the g-C3N4 nanoparticles are uniformly loaded on the surface of BiOI nanosheets and thus form a p–n heterojunction with an intimate interface. The as-prepared samples exhibit enhanced photocatalytic degradation ability towards MO under visible-light irradiation. With the unique structure and morphology, enhanced visible-light photocatalytic activities are achieved owing to the synergistic effect of light harvesting, high transfer efficiency and enhanced separation efficiency of photo-generated carriers.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 36
·16750-16759
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IF 3.591
Yining Zheng,Cundi Wei,Qi An,Jinsheng Yu,Shaonan Xu,Lina Li
The aluminum alloy is used as the aluminum source, together with melamine and cyanuric acid, in a water reaction system to obtain the precursor of Al2O3/g-C3N4 through self-assembly in one step, and then calcined to obtain the Al2O3/g-C3N4 composite photocatalytic material. γ-Al2O3 has a defect site that can accept g-C3N4 electrons and can bind well with g-C3N4. The addition of γ-Al2O3 changed the morphology of g-C3N4 into a damaged tubular structure with many irregular pores. Also, the specific surface area increased to about 1.2 times that of g-C3N4, and the light absorption edge was extended to 500 nm. In addition, the position of the valence band of g-C3N4 was also changed. Compared with g-C3N4, Al2O3/g-C3N4 has better photocatalytic performance, and the degradation rate of dye rhodamine B (RhB) is about 1.70 times that of g-C3N4.
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 MEDICAL VIROLOGY
·
2022
·Vol. 94
·期 6
·2519-2527
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IF 20.693
Lu Lv,Haoran Cui,Zhiyang Chen,Yixuan Zhou,Leiliang Zhang
Chikungunya virus (CHIKV) is a mosquito-transmitted alphavirus affecting human health globally. G-quadruplex secondary structures attract great attention as potential targets for antiviral strategy. In this study, we show that the CHIKV genome possesses several conserved potential G-quadruplex sequences. G-quadruplex ligands BRACO-19 and TMPyP4 could stabilize the CHIKV G-quadruplex and inhibit the transcription of constructs containing CHIKV G-quadruplex sequences. Importantly, BRACO-19 and TMPyP4 suppress CHIKV replication. Our study not only reinforces the presence of viral G-quadruplex sequences but also suggests that targeting G-quadruplex structure could represent a novel strategy to inhibit CHIKV. Highlights CHIKV possesses conserved G-quadruplexes G-quadruplex ligands stabilize CHIKV G-quadruplexes with high affinities G-quadruplex structures reduce the transcription of the GFP reporter gene containing CHIKV G-quadruplex G-quadruplex ligands BRACO-19 and TMPyP4 inhibit CHIKV replication
研究领域:
病毒学
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分子生物学
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药物化学
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DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Lu Qin,Peng She,Panlong Si,Suqin Liu,Gaopeng Dai,Cong Pan
Photocatalytic production of H 2 O 2 is indeed a safe, sustainable and cost-effective technology, offering an environmentally friendly solution to the energy crisis through solar photocatalysis. However, it still faces challenges such as reliance on organic electron donors and pure O 2 , as well as inefficiencies in hole utilization. To overcome these limitations, a dual-channel photocatalytic system has been developed. In this study, we showcase the efficiency of the CuO/Cu(OH) 2 @g-C 3 N 4 composite, derived from CuBTC/g-C 3 N 4 via NaOH treatment, as a high-performance dual-channel photocatalyst for H 2 O 2 production. Under visible light (λ ≥ 420 nm), this composite achieves a H 2 O 2 yield of 1354 μmol/L in 120 min without any sacrificial agent, outperforming g-C 3 N 4 by 8.4 times, CuO by 13.6 times and CuO@g-C 3 N 4 by 1.9 times. Quenching experiments and electron paramagnetic resonance spectra confirmed that HO • and O 2 •− are intermediate products in the photocatalytic process, following a two-step single-electron reaction pathway. The superior activity of CuO/Cu(OH) 2 @g-C 3 N 4 in H 2 O 2 generation can be attributed to the synergistic effects of OH bonds on the CuO@g-C 3 N 4 Z-type heterojunction and Cu(OH) 2 . This research presents a straightforward and promising approach for developing highly efficient photocatalysts for energy conversion.
研究领域:
材料科学
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环境科学
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能源化学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
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 .
研究领域:
材料科学
·
光催化
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Dajun Zhang,Yufei Ma,Ying Wang,Xiangyu Liu,Mengfan Zhao,Yuanke Wang,Song Gao,Fu Ren,Qing Chen
A new solid-phase extraction agent, IgG@ Fe 3 O 4 -PEI, was successfully developed by conjugating immunoglobulin G (IgG) with amino-functionalized magnetic nanoparticles (Fe 3 O 4 -PEI). The IgG@Fe 3 O 4 -PEI composite was characterized using various techniques including infrared spectroscopy, Raman spectroscopy, magnetic property testing, Zeta potential measurements, energy spectrum analysis, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Because of the presence of a specific binding domain in the Fc fragment of IgG, the IgG@Fe 3 O 4 -PEI composite demonstrated highly selective adsorption of recombinant streptococcal G protein (rSPG) under optimal experimental conditions. At pH 6.0, the IgG@Fe 3 O 4 -PEI composite (0.5 mg) achieved a maximum adsorption efficiency of 93.96 % for rSPG at a concentration of 100 μg mL -1 . Adsorption model simulations indicated that the adsorption behavior followed the Langmuir adsorption model, with a theoretical maximum adsorption capacity of 125.0 mg g -1 . The enriched rSPG was eluted and recovered using Britton-Robinson (BR) buffer at pH 10.0, achieving a recovery efficiency of 95.8 %. In practical applications, the IgG@Fe 3 O 4 -PEI magnetic nanoparticles effectively enriched rSPG from an Escherichia coli expression system, and SDS-PAGE analysis confirmed the successful isolation of highly pure rSPG. Furthermore, the IgG@Fe 3 O 4 -PEI magnetic nanoparticles were used to capture proteins from human serum samples. After enrichment and processing, 430 proteins were identified, including 34 that were undetectable in untreated serum samples. This validated the high sensitivity and specificity of this method in serum proteomics, demonstrating its potential for isolating and identifying low-abundance proteins in complex biological samples. The developed system offers a valuable tool for advancing human serum proteomics research and targeted protein analysis.
研究领域:
生物化学
·
纳米技术
·
蛋白质组学
·
生物医学工程
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2012
·
IF 4.555
Ruimin Li,Cen Xiong,Zhiyou Xiao,Liansheng Ling
A novel colorimetric method for detection of cholesterol was developed with hemin-G-quadruplex DNAzyme by transducing oxidation of cholesterol into the color change of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS 2− ). Oligonucleotide 5′-GTGGGTAGGGCGGGTTGG-3′ (Oligo-1) formed G-quadruplex structure in the presence of K + , it acted as a horseradish peroxidase (HRP) mimicking DNAzyme when binding hemin and catalyzed the oxidation of colorless ABTS 2− to green ABTS − by H 2 O 2 , which was produced by the reaction of cholesterol and oxygen that catalyzed by cholesterol oxidase. Therefore, the oxidation of cholesterol could be transduced into the color change of ABTS 2− by combining these two reactions. Under the optimum conditions, the absorbance was proportional to the concentration of cholesterol over the range of 1.0–30 μM, with a linear regression equation of A = 0.362 + 0.0256 C ( C : μM, R = 0.998) and a detection limit of 0.10 μM (3 σ /slope). Moreover, the practicability of the assay in the detection of cholesterol in human serum was studied as well.
研究领域:
生物化学
·
医学诊断
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）