JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 16
·15267-15276
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IF 2.195
Zhang Qingji,Jing Jiangping,Chen Zhuoyuan,Sun Mengmeng,Li Jiarun,Li Yan,Xu Likun
g-C 3 N 4 is a promising material for the application in the area of photoelectrochemical cathodic protection. However, it suffers from limited light absorption and lower charge separation efficiency. In this work, a N defects and C deposition co-modified g-C 3 N 4 , C–g-C 3 N x , was prepared by NaOH-assisted sintering and ethanol-assisted hydrothermal treatment. The presence of N defects and C deposition was verified by the XRD, SEM and XPS tests. The N defects changed the band structure of g-C 3 N 4 by lowering down the conduction band position, therefore widening the light absorption range of g-C 3 N 4 . In addition, the N defects and C deposition co-modification promotes the charge transfer process of g-C 3 N 4 , leading to increased separation efficiency of the photogenerated charge carriers. Therefore, C–g-C 3 N x shows enhanced photoelectrochemical cathodic protection performance for the coupled 316L stainless steel. It can provide a photoinduced potential drop of 120 mV and a photoinduced current density of 9.1 μA cm −2 , which is three times that of pristine g-C 3 N 4 .
研究领域:
材料科学
·
电化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Xueming Dang,Shuai Wu,Haiguang Zhang,Xie Quan,Huimin Zhao
A phosphorus (P) doped g-C 3 N 4 needle (PCNN) electrode with great photoelectrochemical (PEC) property is fabricated by a facile solid thermal melting approach. The proposed thermal melting method owns the advantages of low-cost, simple and easy operation, as only the solid mixing of melamine (C and N precursor) and triphenylphosphine oxide (P precursor) is needed in electrode preparation procedure. This method is further conducive to the formation of uniform film with doped heteroatom and unique microstructure on fluorine-doped tin oxide- coated glass (FTO). The PCNN photoelectrode holds a tip structure, which highly inhibits the recombination of photo-generated electron and hole. Particularly, the doped P in PCNN can further accelerate the photo-generated carrier separation and enhance the optical absorption property. As a result, the PCNN photoelectrode displays a five-fold enhancement of photocurrent density over pristine g-C 3 N 4 , reaching up to 127.4 µA cm - 2 at 1.23 V versus reversible hydrogen electrode (RHE), as well as good optical, chemical and physical stability. The PCNN photoelectrode further exhibits great property in PEC removal of pollutant in water. This study provides an effective fabrication method and opens new avenues for the significant improvement of g-C 3 N 4 based electrode in their various energy conversion and environmental application.
研究领域:
材料科学
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环境科学
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能源转换
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Yixiao Wu,Xuesong Zhao,Shaobin Huang,Yihao Li,Xiaoqian Zhang,Gongchang Zeng,Lishan Niu,Yu Ling,Yongqing Zhang
Photocatalytic oxidation using solar energy is a promising green technology to degrade antibiotic contaminants. Herein, a 2D g-C 3 N 4 supported nanoflower-like NaBiO 3 with direct Z-scheme heterojunction was synthesized via a facile hydrothermal approach, and the photocatalytic performance of g-C 3 N 4 /NaBiO 3 was remarkable better than that of g-C 3 N 4 and NaBiO 3 for tetracycline degradation under visible light. Photoinduced electrons accumulated on the conduction band of g-C 3 N 4 and holes gathered on the valence band of NaBiO 3 , which was more suitable for generating superoxide and hydroxyl radicals . Meanwhile, the built-in electric field between g-C 3 N 4 and NaBiO 3 was proved by their different work functions based on DFT calculations , which enhanced the charges separation. The formed radicals were determined by ESR, and their role in the degradation of tetracycline was examined by the active species trapping test. Moreover, the sites attacked by free radicals and degradation pathways for tetracycline were inferred by the results of Gaussian 09 program and HPLC-MS. The effects of water matrix and three other organic contaminants was further studied for actual use evaluation. Importantly, the prepared g-C 3 N 4 /NaBiO 3 showed stable photodegradation activity for eight cycles. This work not only provides a promising photocatalyst, but also gets insight into the photocatalytic removal of tetracycline.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2019
·
IF 4.914
Jianhua Ge,Yujie Liu,Daochuan Jiang,Lei Zhang,Pingwu Du
Photocatalytic H 2 production via water splitting in a noble-metal-free photocatalytic system has attracted much attention in recent years. In this study, noble-metal-free Ni 3 N was used as an active cocatalyst to enhance the activity of g-C 3 N 4 for photocatalytic H 2 production under visible-light irradiation ( λ > 420 nm). The characterization results indicated that Ni 3 N nanoparticles were successfully loaded onto the g-C 3 N 4 , which accelerated the separation and transfer of photogenerated electrons and resulted in enhanced photocatalytic H 2 evolution under visible-light irradiation. The hydrogen evolution rate reached ∼305.4 μmol h −1 g −1 , which is about three times higher than that of pristine g-C 3 N 4 , and the apparent quantum yield (AQY) was ∼0.45% at λ = 420. Furthermore, the Ni 3 N/g-C 3 N 4 photocatalyst showed no obvious decrease in the hydrogen production rate, even after five cycles under visible-light irradiation. Finally, a possible photocatalytic hydrogen evolution mechanism for the Ni 3 N/g-C 3 N 4 system is proposed.
研究领域:
材料科学
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能源化学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2023
·
IF 3.1
Yujie Jia,Shuhan Jiang,Qianchen Ou,Yanan Liu,Jian Zhang,Yangjie Zhou,Yuan Lian,Hongmei Wang
NiFe-LDH/g-C3N4 (LDH/CN) heterostructures with different amounts of NiFe-LDH (LDH) were prepared by a hydrothermal method and characterized using different experimental techniques. Their photocatalytic properties were investigated using the degradation of tetracycline hydrochloride (TC) and the production of hydrogen from water splitting. Experimental results showed that the hydrogen production rate (780.5 μmol g−1 h−1) was 2.29 times that of pristine CN, and the TC removal rate (76.3%) of 1.8LDH/CN was 3.71 times that of CN. According to the detailed study of the structural, optical, and photoelectrochemical properties, a type II charge transfer mechanism was proposed to explain the improved photocatalytic performance of LDH/CN.
研究领域:
材料科学
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环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Pengfei Wang,Yao Liu,Ning Jiang,Ruisen Jing,Shutao Li,Qian Zhang,Huiqiang Liu,Junshan Xiu,Zhao Li,Yunyan Liu
A ternary heterojunction composite photocatalyst g-C 3 N 4 /AgBr/black phosphorus was constructed by co-modifying AgBr with g-C 3 N 4 (CN) and black phosphorus nanosheets (BPNs). The photoluminescence (PL), photocurrent intensity and electrochemical impedance spectroscopy (EIS) results proved that, compared with bare AgBr and binary CN/AgBr and AgBr/BPNs, ternary CN/AgBr/BPNs effectively promoted the separation and suppresses the recombination of electron-hole pair. The photocatalytic experiment proved that the CN/AgBr/BPNs photocatalyst exhibited almost 8 times for degradation rate of MO，and well above those of binary CN/AgBr and AgBr/BPNs. According to trapping experiments of the active species, the analysis of the energy band , we proposed the double S-scheme to explain the charge transfer and the boosting of photocatalytic activity in ternary CN/AgBr/BPNs. Impressively, this double S-scheme facilitated the transmittance of electrons at the CB position of AgBr to the VB of CN and BPNs, and greatly overcome the light corrosion and enhance the stability of AgBr. This work designed a novel S-scheme mechanism heterojunction photocatalytic material, which provides a convenient way for efficient wastewater treatment.
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
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yangqing He,Bei Ma,Qian Yang,Yu Tong,Zhanying Ma,Lucas Binnah Junior,Binghua Yao
The exploration of metal-free g-C 3 N 4 -based photocatalysts is recognized as one of the most effective approaches for remedying environmental pollution and ameliorating energy crisis. However, the simultaneous realization of a highly efficient, long-term stability and broad visible-light responsive photocatalysts remains a major desirable challenging goal in the area of photocatalysis. Herein, using N,N′-bis(p-carboxyl-phenylene) perylene-3,4:9,10-perylene bisimide (BCPP-PBI) as the efficient surface photovoltaic agent, a novel BCPP-PBI/g-C 3 N 4 heterojunction is successfully constructed via an one-step acylation reaction for the first time. The optimized 1%BCPP-PBI/g-C 3 N 4 composite exhibited significantly improved visible-light absorption capability for light with wavelength shorter than 658 nm and demonstrated remarkably enhanced photocatalytic performance in tetracycline degradation with high stability. Benefitting from the surface modification effect by incorporating BCPP-PBI onto g-C 3 N 4 , there is a significantly improved visible light harvesting capability, as well as, a highly efficient photoexcited charges carrier separation and transfer system in 1%BCPP-PBI/g-C 3 N 4 . The strong covalent chemical bond formed between BCPP-PBI and g-C 3 N 4 enabled the BCPP-PBI molecules to serve as important electron sink which adopts electrons from g-C 3 N 4 . This study paves the way for the design of highly effective g-C 3 N 4 -based metal-free organic catalysts towards their practical utilization in the elimination of recalcitrant antibiotic pollutants from various real wastewaters.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2019
·
IF 3.206
Junling Duan,Li Zhao,Wei Lv,YiJing Li,Yuanhong Zhang,Shiyun Ai,Lusheng Zhu
The g-C 3 N 4 /Fe 3 O 4 nanocomposites with good fluorescence and magnetic property were designed and prepared for simultaneous detection and separation of trace Cr(VI) in water. The g-C 3 N 4 /Fe 3 O 4 nanocomposites based fluorescent sensor for Cr(VI) showed high sensitivity and selectivity. The linear response range of Cr(VI) was found to be 0 to 600 μM with a detection limit of 0.5 μM. In addition, the g-C 3 N 4 /Fe 3 O 4 as a novel adsorbent had effective removal towards Cr(VI). The adsorption capacity could reach 59.2 mg/ g. Furthermore, the g-C 3 N 4 /Fe 3 O 4 nanocomposites displayed superparamagnetic properties, allowing them to be easily separated from the liquid phase via an external magnetic field .
研究领域:
环境化学
·
分析化学
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纳米材料学
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环境污染与控制
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水处理技术
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2017
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IF 4.95
Lei Xu,Xin Shen,Bingzhi Li,Chunhong Zhu,Xuemin Zhou
Adenosine is an endogenous nucleotide pivotally involved in nucleic acid and energy metabolism. Its excessive existence may indicate tumorigenesis, typically lung cancer. Encouraged by its significance as the clinical biomarker, sensitive assay methods towards adenosine have been popularized, with high cost and tedious procedures as the inevitable defects. Herein, we report a label-free aptamer-based exonuclease III (Exo III) amplification colorimetric aptasensor for the highly sensitive and cost-effective detection of adenosine. The strategy employed two unlabeled hairpin DNA oligonucleotides (HP1 and HP2), where HP1 contained the aptamer towards adenosine and HP2 embedded the guanine-rich sequence (GRS). In the presence of adenosine, hairpin HP1 could form specific binding with adenosine and trigger the unfolding of HP1's hairpin structure. The resulting adenosine-HP1 complex could hybridize with HP2, generating the Exo III recognition site. After Exo III-assisted degradation, the GRS was released from HP2, and the adenosine-HP1 was released back to the solution to combine another HP2, inducing the cycling amplification. After multiple circulations, the released ample GRSs were induced to form G-quadruplex, further catalyzing the oxidation of TMB, yielding a color change which was finally mirrored in the absorbance change. On the contrary, the absence of adenosine failed to unfold HP1, remaining color unchanged eventually. Thanks to the amplification strategy, the limit of detection was lowered to 17 nM with a broad linear range from 50 nM to 6 μM. The proposed method was successfully applied to the detection of adenosine in biological samples and satisfying recoveries were acquired.
研究领域:
生物化学
·
分析化学
·
分子生物学
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DOI
PubMed
高影响因子
International Journal of Nanomedicine
·
2017
·
IF 4.3
Guangtao Xu,Huan Gu,Bo Hu,Fei Tong,Daojun Liu,Xiaojun Yu,Yongxia Zheng,Jiang Gu
Brain ischemia/reperfusion (I/R) injury (BI/RI) is a leading cause of death and disability worldwide. However, the outcome of pharmacotherapy for BI/RI remains unsatisfactory. Innovative approaches for enhancing drug sensitivity and recovering neuronal activity in BI/RI treatment are urgently needed. The purpose of this study was to evaluate the protective effects of tumor necrosis factor (TNF)-α-loaded poly(ethylene glycol)-b-(poly(ethylenediamine L-glutamate)-g-poly(L-lysine)) (TNF-α/PEG-b-(PELG-g-PLL)) nanoparticles on BI/RI. The particle size of PEG-b-(PELG-g-PLL) and the loading and release rates of TNF-α were determined. The nanoparticle cytotoxicity was evaluated in vitro using rat cortical neurons. Sprague Dawley rats were preconditioned with free TNF-α or TNF-α/PEG-b-(PELG-g-PLL) polyplexes and then subjected to 2 hours ischemia and 22 hours reperfusion. Brain edema was assessed using the brain edema ratio, and the antioxidative activity was assessed by measuring the superoxide dismutase (SOD) activity and the malondialdehyde (MDA) content in the brain tissue. We further estimated the inflammatory activity and apoptosis level by determining the levels of interleukin-4 (IL-4), IL-6, IL-8, IL-10, and nitric oxide (NO), as well as the expression of glial fibrillary acidic protein (GFAP), intercellular adhesion molecule-1 (ICAM-1), and cysteine aspartase-3 (caspase-3), in the brain tissue. We provide evidence that TNF-α preconditioning attenuated the oxidative stress injury, the inflammatory activity, and the apoptosis level in I/R-induced cerebral injury, while the application of block copolymer PEG-b-(PELG-g-PLL) as a potential TNF-α nanocarrier with sustained release significantly enhanced the bioavailability of TNF-α. We propose that the block copolymer PEG-b-(PELG-g-PLL) may function as a potent nanocarrier for augmenting BI/RI pharmacotherapy, with unprecedented clinical benefits. Further studies are needed to better clarify the underlying mechanisms.
研究领域:
药理学
·
神经科学
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生物材料学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Mengying Xu,Jingyan Zheng,Pier-Luc Tremblay,Xiangyang Jiang,Chun He,Yujie Wang,Muhammad Babur Joya,Tian Zhang
Amid the pursuit of renewable energy, photocatalytic H 2 evolution (PHE) and biosynthetic processes gained attention. Bulk g-C 3 N 4 (CN) was calcined under the atmosphere and various gases (air, CO 2 , N 2 , and Ar) to achieve ultra-thin nanosheets. Using greenhouse gas CO 2 for the calcination (CN–CO 2 ) results in a greater PHE rate than in the atmosphere and air, similar to inert gases N 2 and Ar. Under visible light, CN–CO 2 produced H 2 2.6 times faster than CN. Therefore, CN–CO 2 was chosen to promote polyhydroxybutyrate (PHB) production by Cupriavidus necator H16 in hybrid photosynthetic system. The heterotrophic PHB production was increased to 9.14 g/L, which was 1.9 times higher than without the photocatalyst (4.93 g/L), and 1.1 times more than with CN (8.11 g/L). The autotrophic PHB production was also enhanced by adding CN–CO 2 . In summary, the dual benefits of PHE and biological stimulation were achieved by calcining g-C 3 N 4 in CO 2 .
研究领域:
能源生物学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Fan Yang,Jingrui Duan,Yan Chen,Huiying Meng,Wanying Zhang,Ruiting Li,Wen Luo,Yang Wu,Yong Wang,Peng Zhang,Yifan Zhang
In this study, a bimetallic Pt-Ni alloy catalyst, designated PN 0.5 /VCN 1 , was synthesized with the objective of enhancing the photocatalytic hydrogen evolution performance. Photoelectrochemical characterizations confirm that PN 0.5 /VCN 1 significantly improves light absorption, charge transfer efficiency, and proton adsorption/activation capability, leading to enhanced photocatalytic performance. The results demonstrate that under optimized conditions (300 W Xe lamp, lactic acid as the hole scavenger) PN 0.5 /VCN 1 achieves a hydrogen evolution rate of 8.77 mmol·g -1 ·h -1 (4079 times higher than pure CN) with remarkable stability. And stability tests over four cycles (20 h total) indicate no significant activity loss. This enhancement is attributed to the localized surface plasmon resonance (LSPR) effect of the alloy, interfacial electron redistribution, and synergistic metal-defect interactions. The modification strategy proposed in this study offers a rational and cost-effective approach for efficient photogenerated charge separation and accelerated proton reduction kinetics, providing a competitive advantage in the market. This work provides a foundation for designing high-performance photocatalytic systems.
研究领域:
材料科学
·
能源化学
·
光催化
✓ 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）