RSC Advances
·
2016
·Vol. 6
·期 34
·28263-28269
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IF 3.289
Xiumin Ma,Quantong Jiang,Weimin Guo,Meng Zheng,Weichen Xu,Fubin Ma,Baorong Hou
In this study, a sandwich-structured C3N4/Au/CdZnS photocatalyst with Au nanoparticles sandwiched between C3N4 and CdZnS was fabricated. The results showed that there was a 6.3 mmol g−1 increase of hydrogen production for C3N4/Au/CdZnS photocatalyst compared to C3N4/CdZnS in 4 h. The photoinduced I–t curve, electrochemical impedance spectrum (EIS), photogenerated electron lifetime and photoluminescence spectra showed that the photocatalytic ability of the composite was enhanced by anchoring Au as the electron transfer mediator between C3N4 and CdZnS through the Z-scheme charge-carrier transfer mechanism. Au functioned as an electron transition mediator, which could induce a combination between photogenerated electrons and holes in the CdZnS and C3N4, respectively. These photogenerated holes of CdZnS can be involved in the S2−/SO32− oxidation process and the electrons from the C3N4 surface might be involved in the water to hydrogen reduction reaction, thus enhancing the photocatalysis performance of C3N4/Au/CdZnS photocatalyst.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Dong Yang,Xuyang Zhao,Yao Chen,Wenjing Wang,Zhiyuan Zhou,Zhanfeng Zhao,Zhongyi Jiang
The g-C3N4 nanosheet/TiO2 (CNNS/TiO2) heterojunctions have been synthesized by using polydopamine (PDA) as both linker and inducer enlightened by the bioadhesion and biomineralization mechanisms existing in mussel and shellfish in this study. In the as-prepared CNNS/TiO2 sample, TiO2 nanoparticles about 5 nm in size distribute on the CNNS surface uniformly. Moreover, the heterojunction structure is formed between TiO2 and CNNS. In contrast with CNNS and TiO2, the CNNS/TiO2 heterojunctions display much more superior Rhodamine B (RhB) photocatalytic degradation activity, which can reach 100% within 60 min under irradiation of visible light and preserves excellent stability after four recycles. The heterojunction structure formed by CNNS and TiO2 is conducive for separation of the photogenerated carriers and thus is favorable for improving photocatalytic performance. This method may develop a novel avenue to broadly synthesizing CNNS-based nanocomposites with superior photocatalytic performance.
研究领域:
材料科学
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环境科学
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生物仿生学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Ziqian Gao,Longlong Wang,Lei Wang,Jingwei Huang,Houde She,Qizhao Wang
Construction of heterostructured photocatalysts is a feasible method for improving hydrogen production from water splitting because of its good charge transport efficiency. Herein, we coupled the Ti-MOFs (TiATA) with metal-free graphitic carbon nitride (g-C 3 N 4 ) to synthesize composites, g-C 3 N 4 @TiATA, in which a heterostructure was formed between g-C 3 N 4 and TiATA. The establishment of heterojunctions not only broadens the light absorption range of g-C 3 N 4 @TiATA (490 nm) by contrast with g-C 3 N 4 (456 nm), but also greatly accelerates charge migration. Photocatalytic studies present that the construction of heterostructure steering the charges flow from g-C 3 N 4 to TiATA and then delivery to the cocatalyst of Pt nanoparticles , exhibiting an impressively photocatalytic hydrogen production rate (265.8 μmol·h −1 ) in assistance of 300 W Xenon lamp, which is about 3.4 times as much as g-C 3 N 4 /Pt.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Cheng Cheng,Dongyun Chen,Najun Li,Hua Li,Qingfeng Xu,Jinhui He,Jianmei Lu
Semiconductor materials have been used for photocatalytic degradation since they were discovered to be useful for photocatalytic degradation. Many studies have been researched to improve the efficiency of photocatalytic degradation. Among them, the introduction of vacancies to improve the photocatalytic efficiency has been verified to be a more feasible method. In this study, we combined two-dimensional (2D) graphite carbon nitride (g-C 3 N 4 ) nanosheets with oxygen-containing vacancy zero-dimensional (0D) Bi 2 WO 6 (BWO-OV) quantum dots to prepare 2D-0D g-C 3 N 4 /Bi 2 WO 6 -OV composite catalyst. The use of Bi 2 WO 6 containing oxygen vacancies enhanced the absorption of light and increased the generation of photogenerated carriers. In addition, the formation of heterojunction and the vacancy structure of Bi 2 WO 6 promote the life of photogenerated carriers and improve the catalytic effect of the catalyst. This structure shows high efficiency in removing low concentration (0.5 ppm) of nitric oxide (NO) at room temperature. The efficiency of the composite catalyst is much higher than g-C 3 N 4 or BWO-OV, and better than the composite g-C 3 N 4 /Bi 2 WO 6 without oxygen vacancies. When applied to NO removal, the composite g-C 3 N 4 /Bi 2 WO 6 -OV-10 showed the best catalytic activity which was up to 61.2%. At the same time, five cycles of experiments show that the material has excellent stability.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Huiqin Wang,Jingru Guan,Jinze Li,Xin Li,Changchang Ma,Pengwei Huo,Yongsheng Yan
In this work, the ordered mesoporous CeO 2 (m-CeO 2 ) was successfully fabricated via the nanocasting pathway, through using SBA-15 as a hard template. Besides, g-C 3 N 4 /Ag/m-CeO 2 composite was successfully constructed by calcination method. Meanwhile, the obtained samples were investigated by series of test techniques. The XRD, SEM and TEM results show that the m-CeO 2 and Ag/m-CeO 2 with the ordered mesoporous trait. Besides, the EPR, Raman and XPS results suggest that the oxygen vacancies (O v ) and Ce 3+ and Ce 4+ are in g-C 3 N 4 /Ag/m-CeO 2 . In addition, the ordered mesostructure is favorable for the CO 2 molecular movement and adsorption/desorption reaction. The g-C 3 N 4 nanosheets, a promising material possessing suitable conductor band, large specific area, non-toxicity, and outstanding chemical stability, is a candidate semiconductor for CO 2 conversion. The introduction of g-C 3 N 4 nanosheets to Ag/m-CeO 2 overcomes the photocorrosion of Ag nanoparticles and Ag facilitate the transfer of photogenerated electrons. The photocatalytic activity results show that when the loading of Ag is 7 wt%, the g-C 3 N 4 /7Ag/m-CeO 2 composite exhibits the superiority activity for CO 2 photoconversion to CO (13.94 μmol/g) and CH 4 (7.39 μmol/g) under UV-irradiation in 10 h.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 32
·48522-48538
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IF 5.19
Wang Guanghui,Li Yingjie,Dai Jialing,Deng Nansheng
In this present study, a novel indirect Z-scheme TiO 2 @g-C 3 N 4 @biochar (TiO 2 @g-C 3 N 4 @BC) composite photocatalyst was successfully fabricated and characterized with SEM, TEM, EDS, XRD, FTIR, PL, XPS, and UV–vis DRS. The photocatalytic degradation behavior of ciprofloxacin (CIP) on the TiO 2 @g-C 3 N 4 @BC was evaluated under UV–vis and visible light irradiation, and the possible reaction mechanism of photocatalytic oxidation of CIP on the TiO 2 @g-C 3 N 4 @BC was explained. The TiO 2 @g-C 3 N 4 @BC composite photocatalyst exhibited stronger photocatalytic oxidation activity for CIP in comparison with TiO 2 , g-C 3 N 4 , TiO 2 @BC, and TiO 2 @g-C 3 N 4 . After 60 min of UV–vis and visible light irradiation, the photocatalytic removal efficiency of CIP by TiO 2 @g-C 3 N 4 @BC was 99.3 and 89.2%, respectively. The photocatalytic removal performance of CIP was affected by the initial concentration of CIP, catalyst dosage, and pH value. The composite photocatalyst presented excellent stability and reusability after five cycles. An indirect Z-scheme principle of the CIP photocatalytic oxidation reaction on TiO 2 @g-C 3 N 4 @BC was clearly proposed, and the whole process of photocatalytic degradation was the results of the interaction between CIP and reactive active species (·O 2 − , h + , and ·OH), of which ·O 2 − is the main active substance. Four CIP degradation pathways were proposed. This work may provide an effective strategy to remove antibiotics in wastewater.
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
ACS Applied Nano Materials
·
2023
·
IF 5.9
Xiaoqing Wang,Chengjiang Qian,Wenjie Pan
Extended utilization of polypropylene (PP) is compromised by its high flammability. Owing to the merits of easy preparation and abundance in raw materials, graphitic-like carbon nitride (g-C3N4, denoted as CN) is favored as flame retardant for PP. Nevertheless, it is hard to acquire the satisfying flame retardancy efficiency when CN dosage is low. Here, the interfacial assembly strategy is utilized to obtain the micro–nano structure of phosphorus-doped CN/CoMoO4 (PCN–Co) as flame retardant for PP. When using 2.0 wt % PCN–Co, the decomposition temperatures are markedly enhanced, confirming the delayed thermal degradation. Peak heat release rate and total heat release values are impaired by 33.6 and 12.0%, implying the inhibited release of heat. Peak smoke production rate and total smoke production values are dampened by 45.1 and 34.9%, signifying hindered emission of smoke. In short, this work provides inspiration for the design of CN-based nanostructures, mining their potentials in polymer composite fields.
研究领域:
材料科学
·
聚合物工程
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产品关联
DOI
高影响因子
Journal of Nanoelectronics and Optoelectronics
·
2023
·Vol. 18
·期 12
·1419-1426
·
IF 0.6
Li Nianci,Yu Li,Zhang Hao
In this study, a novel 2D SnO2/g-C3N4 nanosheet heterojunction was successfully synthesized utilizing a facile hydrothermal method coupled with a subsequent pyrolysis process. Comprehensive characterization employing X-ray diffraction (XRD), X-ray photoelectron
spectroscopy (XPS), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA) confirmed the formation of nanocomposites featuring lamellar g-C3N4 nanosheets enveloping SnO2 nanoparticles. The SnO2/g-C3N4 heterojunctional
composite, with a g-C3N4 weight of 55.66%, exhibited a remarkable maximum gas-sensing response of 8.81 towards 20 ppm acetone at the optimized operating temperature of 280 °C. This response was approximately 3.1 times higher than that observed for pure SnO2
nanoparticles. The heightened sensing performance is attributed to the homogeneous dispersion of SnO2 nanoparticles on lamellar g-C3N4 nanosheets and the formation of an n-n heterojunction. The insights gained from this investigation offer valuable implications
for the design and fabrication of metal oxide-based heterojunctional nano/microstructures, providing enhanced capabilities for gas sensing applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Pharmaceutics
·
2023
·Vol. 15
·期 5
·1414
·
IF 5.4
Ruizhuo Ouyang,Jinyao Liu,Shen Wang,Weilun Zhang,Kai Feng,Conghao Liu,Baolin Liu,Yuqing Miao,Shuang Zhou
In order to develop new anti-cancer drugs more efficiently and reduce side effects based on active drug targets, the virtual drug screening was carried out through the target of G-quadruplexes and 23 hit compounds were, thus, screened out as potential anticancer drugs. Six classical G-quadruplex complexes were introduced as query molecules, and the three-dimensional similarity of molecules was calculated by shape feature similarity (SHAFTS) method so as to reduce the range of potential compounds. Afterwards, the molecular docking technology was utilized to perform the final screening followed by the exploration of the binding between each compound and four different structures of G-quadruplex. In order to verify the anticancer activity of the selected compounds, compounds 1, 6 and 7 were chosen to treat A549 cells in vitro, the lung cancer epithelial cells, for further exploring their anticancer activity. These three compounds were found to be of good characteristics in the treatment of cancer, which revealed the great application prospect of the virtual screening method in developing new drugs.
研究领域:
药理学
·
生物信息学
·
肿瘤学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jiaming Li,Shuo Wang,Yizhen Jiang,Shangshang Wang,Jingting Sun,Yuxi Song,Chao Liu,Qinfang Zhang
The process of Photocatalytic Hydrogen Evolution (PHE) represents a reliable method for addressing the energy crisis. In this work, a self-assembly method was performed to combine 2D NiPS 3 (NPS) nanosheets (Ns) with 2D CN Ns to prepare NPS Ns/CN Ns (NPCN) 2D/2D heterojunctions with intimately interfacial contact between these two components. Compared to CN Ns, NPCN photocatalysts possess wide-spectrum light absorption regions, excellent light-to-thermal energy effect, electron mobility, charges transfer, and abundant surface active site, thus leading to the enhanced PHE performance for NPCN composites in natural seawater and simulated seawater. Meanwhile, the negative effect of the added various ions on the PHE performance was revealed over 2-NPCN using different typical aqueous solutions. The first-principle calculations and experimental analysis were performed to gain a deep understanding of the underlying mechanisms responsible for the exceptional HER activity over NPCN composites. Drawing from the characterization and DFT calculation results, a photothermal-assisted PHE mechanism was proposed over NPCN composites. This work provides a strategy for the design and synthesis of efficient, stable and highly active g-C 3 N 4 -based heterojunctions.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 23
·14602-14609
·
IF 3.269
Ke Xu,Hong Xu,Guangwei Feng,Jian Feng
NiS cocatalyst modified LaFeO3/g-C3N4 heterostructures were successfully prepared and their photocatalytic hydrogen evolution performance under visible light irradiation was presented. LaFeO3/g-C3N4/NiS composites were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), inductively coupled plasma mass spectrometry (ICP-MS), X-ray photoelectron spectroscopy (XPS), nitrogen adsorption desorption isotherms, UV-vis diffuse reflectance spectroscopy (DRS), transient photocurrent responses and electrochemical impedance spectroscopy (EIS). The results indicated that the LaFeO3/g-C3N4/NiS heterostructures had enhanced photocatalytic hydrogen evolution performance than pure g-C3N4, LaFeO3 and LaFeO3/g-C3N4. 5%-LaFeO3/g-C3N4/2%NiS exhibited the highest photocatalytic hydrogen evolution rate of 121 μmol g−1 h−1 under visible light, which was almost 60 times higher than the hydrogen evolution rate of 5%-LaFeO3/g-C3N4. The effective separation of photogenerated electron–hole pairs in the LaFeO3/g-C3N4 Z-scheme system with NiS as a cocatalyst enhanced the photocatalytic hydrogen evolution performance. This study provided a facile approach to prepare NiS modified LaFeO3/g-C3N4 heterostructures and to construct an effective photocatalytic system for hydrogen evolution under visible light irradiation.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Separations
·
2022
·Vol. 9
·期 12
·391
·
IF 3.344
Zhiquan Yang,Chong He,Wenning Liao,Xinyi Zhang,Wanhui Liu,Baosheng Zou
Dye effluent damaged the water environment and human health with its massive discharge. In order to eliminate dye from the water environment, a variety of adsorbents were used to investigate dye removal. Graphene oxide (GO) attracted extensive attention due to its excellent surface property in the degradation of dye wastewater. Modified GO with multifunctional groups helped to improve adsorption performance. 3-Aminopropyltriethoxysilane modified GO (AS-GO) was fabricated for the removal of Orange G (OG) in this study. The results showed that AS-GO had an excellent adsorption ability of OG. During the reaction process, the maximum adsorptive capacity of OG was up to 576.6 mg/g at T = 313 K and pH = 3 with the initial OG concentration of 100 mg/L and the initial adsorbent dose of 2.5 g/L. The adsorption kinetic process of AS-GO conformed to the pseudo-second-order and Langmuir models. The spontaneous and endothermic adsorption of OG occurred in the adsorption process. The main adsorption mechanisms were electrostatic, π–π and hydrogen bonding interactions in the reaction process. After four cycles of AS-GO, it maintained high removal efficiency owing to its remarkable stability. The scheme of GO modified with AS could hinder the agglomeration of GO and provide more active sites, which would further enhance the adsorption properties and expand its application in water purification.Keywords:adsorption;Orange G;graphene oxide;3-aminopropyltriethoxysilane
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
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