APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Yu Guan,Jiang Wu,Yuyu Lin,Qizhen Liu,Yongfen Qi,Weiguo Pan,Ping He,Xuemei Qi,Run Wang,Zhonghao Ji
The ternary complex photocatalysts of BiOIO 3 /g-C 3 N 4 /MoS 2 by solvent-exfoliation method was synthesized for the first time. In the typical procedure, the BiOIO 3 /g-C 3 N 4 was obtained via hydrothermal synthesis technique, and then the BiOIO 3 /g-C 3 N 4 /MoS 2 photocatalysts were prepared via ultrasonic solvent-exfoliation method from bulk commercial MoS 2 in the alcohol solution. The samples of BiOIO 3 /g-C 3 N 4 /MoS 2 were analyzed by PL , XRD and other characterization analysis methods. The photocatalytic activity of the as-prepared samples was investigated by removing gas phase mercury irradiation under visible light . The as-prepared BCM-0.3 exhibits excellent photocatalytic performance, being with the highest efficiency of 70.58%. Owing to the electronic channels of field-effect, an internal electric field was formed through the corresponding band-gap engineering, improving photocatalytic reaction. Besides, the excellent activity of the ternary photocatalysts BiOIO 3 /g-C 3 N 4 /MoS 2 is attributed to heterostructure between BiOIO 3 /g-C 3 N 4 and MoS 2 , which enlarges spectral response and improved separation efficiency of charge carriers, and MoS 2 -composing, which provides more active sites for catalytic oxidation . In addition, the as-prepared samples with excellent photocatalytic performance also offer a perspective insight into the hydrogen evolution , CO 2 conversion and degradation of organic pollutants.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Chunpeng Bai,Jingce Bi,Junbiao Wu,Yan Xu,Sebastian Wohlrab,Yide Han,Xia Zhang
In this work, a series of Ag/AgX (X = Cl, Br, I)/g-C 3 N 4 (Ag/AgX/CN) composites were successfully fabricated by an in-situ solid phase method. The morphology and structure, photoluminescence and photoelectrochemical properties of composites were investigated in detail. The as-prepared Ag/AgX/CN composites were used as H 2 evolution photocatalysts under visible-light irradiation with a sacrificial agent . The experimental results revealed that Ag/AgI/CN-4 composite possesses highest-H 2 evolution rate (up to 59.22 μmol g −1 h −1 ) which are approximately 31 times higher than that of pure g-C 3 N 4 (1.94 μmol g −1 h −1 ). In addition, Ag/AgCl/CN-4 and Ag/AgBr/CN-4 composites also present high photocatalytic activities yielding, 26.39 and 18.05 μmol H2 g −1 h −1 , respectively. The enhanced photocatalytic activities of Ag/AgI/CN-4 composite might be attributed to the synergistic effect between Ag/AgI nanoparticles and g-C 3 N 4 and the localized surface plasmon resonance effect of metallic Ag. Moreover, Ag/AgI/CN-4 composite showed excellent recyclability and stability after five cycling photocatalytic tests (about 25 h). Furthermore, the possible photocatalytic mechanism of Ag/AgI/CN composites is proposed.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2018
·
IF 2.891
Huili Zhang,Zhiyuan Feng,Yekun Zhu,Ying Wu,Tinghua Wu
WO 3 /g-C 3 N 4 (graphitic carbon nitride) composite was prepared via a directly calcination method with ammonium tungstate hydrate and melamine as raw materials, and applied in the photocatalytic oxidation of 5-hydroxymethylfurfural (5-HMF) to 2,5-diformylfuran (DFF) for the first time. Its physicochemical properties were characterized by HR(TEM), XRD, FT-IR, XP, UV-vis, PL, PC and EIS methods. The results revealed that the doping of WO 3 into g-C 3 N 4 can reduce the possibility of charge recombination and thus enhancing the photocatalytic activity. The impact factor, such as incident wavelength, reaction time, and solvent were also studied on the photocatalytic behavior. 4.7%WO 3 /g-C 3 N 4 composite catalyst exhibits the highest 5-HMF conversion of 27.4% with DFF selectivity of 87.2% under the irradiation of visible-light (>400 nm). As the active species, O 2 − and h + plays an important role to convert 5-HMF to DFF. Finally, the Z-scheme mechanism and reaction route were proposed by combining the photocatalytic performance with the active oxygen species research of the WO 3 /g-C 3 N 4 catalyst.
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Research Letters
·
2018
·Vol. 13
·期 1
·1-7
·
IF 3.125
Wang Shan,Liu Ruiqing,Li Chenchen
In the presence of Hg 2+ , a fluorescence resonance energy transfer (FRET) system was constructed between CdSe quantum dots (QDs) (donor) and g-C 3 N 4 (receptors). Nanocomposites of g-C 3 N 4 supported by CdSe QDs (CdSe QDs/g-C 3 N 4 nanosheets) were fabricated through an electrostatic interaction route in an aqueous solution. The nanocomposites were characterized by X-ray photoelectron spectroscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, and transmission electron microscopy. Results showed that the g-C 3 N 4 nanosheets were decorated randomly by CdSe QDs, with average diameter of approximately 7 nm. The feasibility of the FRET system as a sensor was demonstrated by Hg (II) detection in water. At pH 7, a linear relationship was observed between the fluorescence intensity and the concentration of Hg (II) (0–32 nmol/L), with a detection limit of 5.3 nmol/L. The new detection method was proven to be sensitive for detecting Hg 2+ in water solutions. Moreover, the method showed high selectivity for Hg 2+ over several metal ions, including Na + , Mg 2+ , Ca 2+ , Pb 2+ , Cr 3+ , Cd 2+ , Zn 2+ , and Cu 2+ . The CdSe QDs/g-C 3 N 4 nanosheet conjugate exhibited desirable long-term stability and reversibility as a novel FRET sensor. The novel FRET-based fluorescence detection provided an attractive assay platform for quantifying Hg 2+ in complex water solutions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
HOLZFORSCHUNG
·
2018
·Vol. 73
·期 4
·393-399
·
IF 2.079
Yue Dong,Xiaodi Ji,Fenglong Li,Tat Thang Nguyen,Zhanhua Huang,Minghui Guo
A self-cleaning surface treatment has been developed, which is prepared by an eco-friendly and effective two-step method. First, graphitic carbon nitride (g-C 3 N 4 ) was deposited on the wood surface by vacuum impregnation, followed by heat treatment. The morphology, weight change, dimensional stability, crystal and micro structure, and elemental composition of the wood samples were determined by photography, weighting, swelling rate determination, X-ray diffraction (XRD) and scanning electron microscopy and energy dispersive X-ray analysis (SEM-EDXA). Moreover, contact angle measurements and photocatalytic degradation experiments were carried out with Rhodamine B as the target. It was demonstrated that g-C 3 N 4 is successfully deposited on the wood surface, which lowers the heat treatment temperature and renders photocatalytic properties to the coating. The heat treatment at around 210°C strengthened the immobility of g-C 3 N 4 and increased the surface hydrophobicity. Moreover, the better photocatalytic ability of the surface is accompanied with self-cleaning effects.
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2018
·Vol. 143
·期 23
·5764-5770
·
IF 3.864
Chen Men,Chun Hong Li,Xue Mei Wei,Jia Jun Liu,Yu Xin Liu,Cheng Zhi Huang,Shu Jun Zhen
Ricin is an extremely potent ribosome-inactivating protein and serves as a likely food biocontaminant or biological weapon. Thus, simple, sensitive and accurate analytical assays capable of detecting ricin are urgently needed to be established. Herein, we present a novel method for ricin B-chain (RTB) detection by using two materials: (a) a highly efficient hybrid probe that was formed by linking a glucose oxidase (GOD)-encapsulated liposome (GOD-L) to magnetic beads (MBs) through hybridization between an aptamer and a blocker and (b) a new low-background g-C3N4–MnO2 sandwich nanocomposite that exhibits fluorescence resonance energy transfer (FRET) between the g-C3N4 nanosheet and MnO2. In the presence of RTB, the strong binding between RTB and the aptamer can release the blocker-linked liposome from the surface of the MBs. After magnetic separation, the decomposed liposome can release GOD to catalyze the oxidation of glucose, generating a certain amount of H2O2. Then, H2O2 can reduce MnO2 of the g-C3N4–MnO2 nanocomposite to Mn2+, which leads to the elimination of FRET. Thus, the fluorescence of the g-C3N4 nanosheet will be turned on. Because of the excellent signal amplification ability of liposome and the characteristic highly sensitive response of the g-C3N4–MnO2 nanocomposite toward H2O2, RTB could be detected sensitively based on the significantly enhanced fluorescent intensity. The linear range of detection was from 0.25 μg mL−1 to 50 μg mL−1 and the limit of detection (LOD) was 190 ng mL−1. Moreover, the proposed assay was successfully applied in the detection of the entire ricin toxin content in a castor seed.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Lei Qin,Danlian Huang,Piao Xu,Guangming Zeng,Cui Lai,Yukui Fu,Huan Yi,Bisheng Li,Chen Zhang,Min Cheng,Chengyun Zhou,Xiaofeng Wen
A green synthesized gold-catalyst (PDA-g-C 3 N 4 /Au) for highly efficient reduction of nitroaromatics by NaBH 4 was proposed. Polydopamine (PDA) served as the reductant and stabilizer for AuNPs reduction, avoiding the use of chemical reductant and stabilizer that may result in secondary contamination. g-C 3 N 4 not only acted as the support but also provided compatibility for AuNPs deposition, enhancing the stability and deposition of AuNPs, which improved the catalytic activity. Different experimental parameters including the amount of Au loading, concentration of NaBH 4 , and dosage of catalyst were studied. Results showed that PDA-g-C 3 N 4 /Au (3) revealed higher catalytic activity with a rate constant of 0.0514 s −1 and TOF of 545.60 h −1 for 4-NP reduction. In addition, the catalyst was highly efficient in reduction of other nitroaromatics and the reduction rates of these compounds were found as the sequence: methyl orange > 2-nitrophenol > 2, 4-dinitrophenol > Erichrome Black T > Congo red. Moreover, the PDA-g-C 3 N 4 /Au (3) catalyst kept high stability and excellent conversion efficiency over ten reduction cycles. The practical application on different real water samples suggests that this Au catalyst has promising application in environmental water purification. The simple and green synthetic Au catalyst expands the range of application and provides potential application on environmental remediation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Wenning Shen,Xu Wang,Yanfeng Ge,Hui Feng,Lajun Feng
The AgO/g-C 3 N 4 hybrids were prepared by growing and anchoring AgO nanoparticles on the surface of g-C 3 N 4 . The results demonstrated that AgO nanoparticles were well-dispersed on the surface of g-C 3 N 4 and AgO/g-C 3 N 4 hybrids were formed. Compared with bulk g-C 3 N 4 , the hybrids with narrow bandgap could adsorb visible light effectively. Additionally, the hybrids exhibited improved photocatalytic activity for RhB degradation under visible light irradiation and strong bactericidal activity against S. aureus . The RhB degradation and S. aureus inactivation were increased with increasing AgO content, in which the hybrid with 35.0 wt% of AgO showed maximum RhB degradation and minimum numbers of survival S. aureus colonies existed, and owned an apparent rate constant about 24.474 and 0.775 times higher than those of blank g-C 3 N 4 and AgO, respectively. The improved activity of the hybrids might be attributed to highly dispersed AgO nanoparticles, increased visible light absorption and high separation efficiency of photogenerated electron-holes originating from the well-matched band structure between AgO and g-C 3 N 4 .
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Shi Gang Liu,Lei Han,Na Li,Yu Zhu Fan,Yu Zhu Yang,Nian Bing Li,Hong Qun Luo
The development of ratiometric fluorescent strategy is very significant and challenging in bioanalysis. Herein, graphitic carbon nitride (g-C 3 N 4 ) nanosheets and cobalt oxyhydroxide (CoOOH) nanoflakes are exploited for ratiometric fluorescence assay of alkaline phosphatase (ALP) activity. In the g-C 3 N 4 /CoOOH nanohybrid, g-C 3 N 4 nanosheets serve as a signal unit and the CoOOH nanoflakes function as a recognition element, and initially, the fluorescence of g-C 3 N 4 is quenched by the CoOOH nanoflakes. In the absence of target, the CoOOH nanoflakes of the nanohybrid system are able to oxidize o-phenylenediamine (OPD), and the resultant oxidation product (OxOPD) quenches the blue emission of g-C 3 N 4 and meanwhile emits orange fluorescence which acts as another signal element. However, an efficient redox reaction between ascorbic acid (AA) and CoOOH can cause decomposition of the CoOOH nanoflakes, and additionally, ALP can catalytically hydrolyze L-ascorbic acid-2-phosphate (AAP) to generate AA. Thus, in the presence of target, the CoOOH nanoflakes are destroyed by AA preferentially and the OPD is rarely oxidized to OxOPD, accompanied with strong blue emission of g-C 3 N 4 and weak orange fluorescence from OxOPD. Target-dependent dual-signal change made the ratiometric assay possible, and also AA-induced signal variation was investigated and attributed to the stronger reducing capacity of AA than OPD. The ratiometric sensing platform for ALP activity assay provides a new perspective for the applications of two-dimensional nanomaterials to develop novel and sensitive biosensors.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Xia Chen,Wangyang Lu,Tiefeng Xu,Nan Li,Zhexin Zhu,Gangqiang Wang,Wenxing Chen
As highly active species, in theory, hydroxyl radicals ( OH) can move freely and destroy almost all organic compounds, including catalysts with a conjugate structure. Therefore, a system that can generate oxidative species with a high activity, but where the active species is anchored to avoid autooxidation, is urgently required. In this work, we fabricated a novel visible-light-assisted advanced oxidation process based on high-valent iron species (Fe(IV) O) over graphitic carbon nitride (g-C 3 N 4 ) that was coordinated to iron hexadecachlorophthalocyanine (FePcCl 16 ) through imidazole ligands (IMD). Under visible-light excitation, the phthalocyanine ring of the g-C 3 N 4 -IMD-FePcCl 16 /hydrogen peroxide (H 2 O 2 ) can be motivated to an excited state FePcCl 16 ∗ , in which active H 2 O 2 and the generation of anchored Fe(IV) O species are used for the degradation of carbamazepine (CBZ). Because the molecular movement of transient Fe(IV) O species is restricted, the possibility of oxidative collision is minimized, which provides good stability. An analysis of the electron paramagnetic resonance, gas chromatography/mass spectrometry, photoluminescence spectra, periodic on/off photocurrent density response and the photo-assisted catalytic active experiments, indicates that the rapid generation of Fe(IV) O species occurs as the catalyst contacts the H 2 O 2 , which inhibits the conduction-band electrons of the g-C 3 N 4 from reacting with H 2 O 2 and generating OH. This study provides insight into the construction of suitable structures that will enhance visible-light-assisted catalytic oxidation activity and allow for the fabrication of an anchored highly active species.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Tingting Xiao,Zheng Tang,Yong Yang,Lanqin Tang,Yong Zhou,Zhigang Zou
Elegant Z-scheme WO 3 /g-C 3 N 4 composite hollow microspheres (CHMs) were constructed through precisely controlled in situ hydrolysis and a polymerization process consecutively. The formation of intact and well-defined hollow microspheres can be realized through optimizing the ratio of precursors for WO 3 and g-C 3 N 4 . The shell of these hollow microspheres consist of well-distributed WO 3 and g-C 3 N 4 nanoparticles, and excellent heterojunctions with numerous interfaces and highly exposed oxidation-reduction active sites have thus been built. By virtue of this special architecture, more incident photons are expected to be trapped in the hollow cavities, which contribute to more electrons and holes available for photocatalytic reactions. Moreover, these photoinduced hole-electron pairs could be effectively separated, and the lifetime of charge carriers reaches 2.23 ns, which is obviously prolonged compared with the WO 3 . WO 3 /g-C 3 N 4 CHMs as an optimized Z-scheme system retains the original oxidation and reduction abilities for the components without change of the oxidation and reduction potential. Combined with the long survival time of holes and electrons, this photocatalyst showed enhanced degradation rates towards tetracycline hydrochloride (TC-HCl) and ceftiofur sodium (CFS).
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Fengliang Wang,Ping Chen,Yiping Feng,Zhijie Xie,Yang Liu,Yuehan Su,Qianxin Zhang,Yingfei Wang,Kun Yao,Wenying Lv,Guoguang Liu
In this study, a novel visible-light-driven N-doped carbon dot (NCDs)/g-C 3 N 4 composite was successfully synthesized by loading NCDs nanoparticles onto the interlayers and surface of g-C 3 N 4 via a facile polymerized method. The photocatalytic activity of the NCDs/g-C 3 N 4 was remarkably higher than that of g-C 3 N 4 and CDs/g-C 3 N 4 toward the degradation of indomethacin (IDM) under visible light irradiation. With increasing NCDs loading volumes, the photocatalytic activity of NCDs/g-C 3 N 4 initially increased, and then decreased. A very low NCDs content of 1.0 wt% resulted in a 13.6 fold higher reaction rate than that of pristine g-C 3 N 4 . This enhanced photocatalytic activity might have been ascribed to the unique up-converted PL properties, efficient charge separation, as well as bandgap narrowing of the NCDs. Reactive species (RS) scavenging experiments revealed that superoxide radical anions (O 2 −) and photogenerated holes (h + ) played key roles during the photocatalytic degradation of IDM. The quantification of O 2 − showed that NCDs/g-C 3 N 4 formed a larger amount of O 2 − than that of pristine g-C 3 N 4 . Potential photocatalytic pathways of IDM were proposed through the identification of intermediates using HPLC–MS/MS and the prediction of reaction sites based on Frontier Electron Densities (FEDs) calculations, which involved decarboxylation, hydroxylation, as well as the addition and cleavage of indole rings. Toxicity and mineralization evaluations revealed that NCDs/g-C 3 N 4 provided a very desirable performance for the toxicity reduction and mineralization of IDM under longer exposures of visible light irradiation.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）