Materials
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2021
·Vol. 14
·期 20
·5959
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IF 3.623
Jing Zhang,Weijie Zhao,Jiaqi Pan,Ruimin Tang
The Polyacrylonitrile (PAN)/g-C3N4/CdS nanofiber sono-photocatalysts were successfully synthesized by an ordinary electrospining-chemical deposition method. The PAN/g-C3N4/CdS heterojunction nanofibers constructed with the CdS nanoparticles deposited on the PAN/g-C3N4nanofibers. The g-C3N4/CdS heterojunction increase of light absorption and the construction of heterojunction can depress recombination of charge carrier and PAN nanofibers improve the recyclability successfully. Finally, a highly effective photocatalytic activity was performed by degradation of Rhodamine B (RhB) in visible light irradiation. Furthermore, an ultrasonic method is introduced into the sono-photocatalytic system to enhance the degradation efficiency of RhB ascribed to the synergistic effect of ultrasound.Keywords:PAN/g-C3N4/CdS heterojunction;low power ultrasound;sono-photocatalytic activity;nanofibers
研究领域:
材料科学
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环境科学
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化学
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DOI
PubMed
高影响因子
RADIATION PHYSICS AND CHEMISTRY
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2023
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IF 2.9
Junhui He,Qi Ye,Yi Zhu,Miao Yang,Long Zhao
In this study, the degradation of ciprofloxacin (CIP) was investigated in the synergetic system of electron beam irradiation (EBI) combined with graphite carbon nitride/carbon nanodots (g-C 3 N 4 /CDs). The results suggested that the presence of g-C 3 N 4 /CDs could not only promote the degradation of CIP but also significantly enhanced the mineralization ratio. At 25 kGy, the mineralization ratio increased from 18.1% to 69.0% while g-C 3 N 4 /CDs was added. Regeneration experiments revealed that the g-C 3 N 4 /CDs composite possessed good reusability. In addition to finding that the presence of CO 3 2− , HCO 3 − , NO 3 − and NO 2 − obviously restrained the radiolysis process of CIP, the adding of Cl − and SO 4 2− could also have slight inhibitory effects. The effect of various water matrices in EBI&g-C 3 N 4 /CDs systems suggested that the degradation efficiency decreased in lake and tap water. Moreover, the studies in the presence of different radical scavengers suggested that ·OH was the main reactive species in the degradation process. The possible degradation pathway of CIP was proposed in the light of intermediate products using Liquid chromatograph-mass spectrometer (LC–MS) analysis coupled with DFT calculations.
研究领域:
环境科学
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辐射生物学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Zhe Yin,Huanyu Chen,Qiuyu Wang,Ziwen Wang,Guoping Yu,Binglin Tang,Man Zhang,Kangzheng Li,Zhichao Zhang,Qingcheng Luo,Tianding Hu,Bo Lv
Converting plastics into organic matter by photoreforming is an emerging way to deal with plastic pollution and produce valuable organic matter. Water shortage can be alleviated by using seawater resources. To solve these problems, we synthesize a ternary heterostructure composite g-C 3 N 4 /CdS/NiS. Heterojunctions are formed between graphitized carbon nitride (g-C 3 N 4 ), cadmium sulfide (CdS) and nickel sulfide (NiS), which effectively improve the problem of fast charge recombination of pure g-C 3 N 4 and CdS. The results of the g-C 3 N 4 /CdS/NiS photocatalytic tests show that the hydrogen production rates in seawater and pure water for 5 h are 30.44 and 25.79 mmol/g/h, respectively. In stability test, the hydrogen production rate of the g-C 3 N 4 /CdS/NiS in seawater and pure water is similar. This suggests that seawater can replace pure water as a source of hydrogen. While H 2 is generated, the lactate obtained by polylactic acid (PLA) hydrolysis is oxidized to form small organic compounds such as formate, acetate and pyruvate. Our study shows that g-C 3 N 4 /CdS/NiS can not only use seawater as a hydrogen source to produce H 2 , but also photoreformate plastics dissolved in seawater into valuable small organic molecules. This has a positive impact on the production and use of clean energy, as well as on plastic pollution and water scarcity.
研究领域:
环境科学
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材料科学
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PubMed
高影响因子
Catalysis Science & Technology
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2021
·Vol. 11
·期 16
·5579-5589
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IF 6.119
Qixiao Gai,Shoutian Ren,Xiaochun Zheng,Wenjun Liu,Quanli Dong
Transition metal co-catalysts exhibit considerable potential in the photocatalytic water splitting process, but their limited activity and poor stability inhibit their extensive application, and therefore effective schemes are required to further enhance their co-catalytic performance. In this article, 2D/2D C3N4/CdS heterogeneous photocatalysts are first synthesized, and then CoNi alloyed NPs are selectively loaded on their CdS nanosheets by a convenient photodeposition method. The CoNi loading amount and Co/Ni ratio are adjusted by the photodeposition time and precursor Co2+/Ni2+ ratio, respectively. Meanwhile, Co–S bonds are formed between CdS and CoNi NPs. Their optimal hydrogen evolution rate can reach up to 2936.65 μmol g−1 h−1, which is higher than that of C3N4/CdS with Co, Ni or Pt as co-catalysts (i.e. 844.59, 2385.96 and 2486.66 μmol g−1 h−1), respectively. The enhanced photocatalytic performance should be due to the following three points: (1) the formation of the 2D/2D C3N4/CdS heterojunction; (2) the optimized Gibbs free energy of the CoNi co-catalysts; (3) the formation of Co–S bonds between CoNi and CdS. Our work provides a cost-effective scheme to exploit stable and efficient photocatalysts.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Zihan Yang,Jingkai Yang,Lixia Li,Wanning Cao,Jiao Zhang,Hongli Zhao,Liqin Wang
The challenge of creating effective S-scheme visible-light photocatalysts persists due to the inactive visible-light-driven component and the low band-gap characteristics of semiconductors. In this work, we developed a novel F-BiVO 4 /g-C 3 N 4 /CdS dual S-scheme photocatalyst using a sonochemical method. The removal efficiency of Cr(VI) and ciprofloxacin (CIP) can reach 98 % and 90 % in 5 min and 30 min, respectively, under simulated solar illumination. The excellent photocatalytic activity can be attributed to the efficient carrier separation and transport with the help of internal electric field at the interface. This work also reveals the reduction process of Cr(VI), as well as the intermediates and pathways involved in the CIP degradation, taking into account practical situations and expanding its potential applications. This research presents promising prospects for the design of bismuth-based dual S-scheme heterojunctions in the field of environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Jiaojiao Fang,Yukai Chen,Wei Wang,Liang Fang,Chunhua Lu,Cheng Zhu,Jiahui Kou,Yaru Ni,Zhongzi Xu
Herein we first coupled a wide photo-response photocatalyst with plasmon-enhanced triplet − triplet annihilation upconversion (TTA-UC) nanoparticles for photocatalytic hydrogen generation. The plasmon-based enhancement of TTA-UC was achieved by introducing Au nanoparticles into the core liquid of TTA-UC nanoparticles containing platinum(II)-octaethylporphyrin and 9,10-diphenylanthracene. Au-TTA nanoparticles encapsulated by silica shells significantly increased the green-to-blue upconversion compared with TTA nanoparticles. The silica shells after further surface functionalization can conjoin with photocatalysts. To improve the stability of cadmium sulfide (CdS), graphitic carbon nitride (g-C 3 N 4 ) was combined with CdS for g-C 3 N 4 -CdS heterojunctions. g-C 3 N 4 -CdS sheets based on Au-enhanced TTA-UC can utilize the upconverted high-energy photons and thereby realized efficient photocatalytic hydrogen production. Au-TTA nanoparticles conjoined with g-C 3 N 4 -CdS reached a high hydrogen production of 16.88 mmol g −1 under visible-light irradiation and an apparent quantum efficiency of 1.439% under green-light irradiation. The study provides a new TTA-supported upconversion-photocatalysis system enhanced by Au plasmon resonance effect for effectively hydrogen generation.
研究领域:
材料科学
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光化学
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纳米技术
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高影响因子
Chemosensors
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2022
·Vol. 10
·期 7
·286
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IF 4.229
Yonghuan Su,Lixia Su,Bingqian Liu,Youxiu Lin,Dianping Tang
A highly sensitive self-powered photoelectrochemical (spPEC) sensing platform was constructed for Hg2+determination based on the g-C3N4-CdS-CuO co-sensitized photoelectrode and a visible light-induced redox cycle for signal amplification. Through successively coating the single-layer g-C3N4, CdS, and CuO onto the surface of an electrode, the modified electrode exhibited significantly enhanced PEC activity. The microstructure of the material was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). However, the boost in photocurrent could be noticeably suppressed due to the consumption of hole-scavenging agents (reduced glutathione) by the added Hg2+. Under optimal conditions, we discovered that the photocurrent was linearly related to the Hg2+concentration in the range of 5 pM–100 nM. The detection limit for Hg2+was 0.84 pM. Moreover, the spPEC sensor demonstrated good performance for the detection of mercury ions in human urine and artificial saliva.Keywords:g-C3N4-CdS-CuO composites;self-powered photoelectrochemical assay;Hg2+detection;redox cycle signal amplification
研究领域:
分析化学
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环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2019
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IF 7.65
Yanping Hou,Guiyun Yuan,Shuangfei Wang,Zebin Yu,Shanming Qin,Lingli Tu,Yimin Yan,Xixi Chen,Hongxiang Zhu,Yankui Tang
In this study, a self-biased bio-photoelectrochemical system (SB-BPES) was constructed using a bioanode and the g-C 3 N 4 /CdS heterojunction photocathode for nitrofurazone (NFZ) degradation under solar irradiation. The physio-chemical properties and optical performance of photocatalysts were characterized, and photo-electrochemical properties of various photocathodes were analyzed. Results showed that g-C 3 N 4 /CdS exhibited the broadest visible light absorption range (to 594 nm) and the most efficient e − -h + separation; and its corresponding photocathode showed the highest photocurrent (9.8 μA), and the lowest charge transfer resistance (5.43 ☓ 10 3 Ω). In the solar-illuminated SB-BPES with g-C 3 N 4 /CdS photocathode, about 80% of NFZ removal rate was achieved within 10 h. More importantly, TOC removal of 62.6% was achieved in 24 h, which was 1.8 times of that from the open circuit SB-BPES, and 4.3 folds of that from microbial degradation; also, about 1.5 times of those from SB-BPES with g-C 3 N 4 and CdS photocathodes. Besides, reproducible current generations (∼1.0 mA) were produced. These verified that it was a self-sustained system for spontaneously pollutants degradation and electricity generation. Moreover, possible degradation mechanism and pathways were proposed according to the identified intermediates. This study provides inspiration for synchronic improving refractory organics degradation and net energy recovery.
研究领域:
环境科学
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材料科学
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生物学
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2018
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IF 5.123
Xing-Pei Liu,Jing-Shuai Chen,Chang-jie Mao,He-Lin Niu,Ji-Ming Song,Bao-Kang Jin
Herein, we established a novel ultrasensitive photoelectrochemical biosensor for detecting urokinase-type plasminogen activator (u-PA), based on a g-C 3 N 4 /CdS nanocomposite. The prepared nanocomposite was characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet–visible absorption spectroscopy , and Fourier transform infrared spectroscopy , thus indicating that the nanocomposite was prepared successfully. In the typical process, the prepared nanocomposite was deposited on the surface of a bare FTO electrode. After being air-dried, the g-C 3 N 4 /CdS nanocomposite modified electrode was successively incubated with antibody against urokinase-type plasminogen activator and the blocking agent BSA to produce a photoelectrochemical biosensor for u-PA. In the presence of target u-PA antigen, the photocurrent response of the prepared biosensor electrode decreased significantly. The proposed novel photoelectrochemical biosensor exhibited good sensitivity, specificity, and reproducibility for u-PA detection, and a low detection limit of 33 fg mL −1 , ranging from 1 μg mL −1 –0.1 pg mL −1 . The proposed strategy should provide a promising method for detection of other biomarkers.
研究领域:
生物传感器
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纳米技术
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分析化学
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生物医学工程
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DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2026
·
IF 7.1
Jinli Fu,Lingling Zhang,Jiahao Yuan,Zhenyu Li,Chunhua Luo,Hechun Lin,Hui Peng
S-scheme heterojunction nanozyme (C 3 N 4 @CDs-ZIF) in hydrogel for photo-/piezo synergy. • Tunable multienzyme-like activities (POD/OXD/CAT/SOD) to UV/Vis/NIR and ultrasound. • Built-in E-field suppresses recombination, enabling 92.5% RhB and 96.47% S. aureus kill. • Microenvironment regulation for infected diabetic wound healing achieves 85% closure by day 12. Inspired by the multienzyme-like cascade of natural antioxidative systems, we report a sustainable photoluminescent hydrogel platform (PAM:C 3 N 4 @CDs-ZIF) engineered with synergistic photo-/piezoelectric enhancement. By constructing an S-scheme heterojunction between carbon nitride (C 3 N 4 ) nanosheets and carbon dot-functionalized ZIF-8 (CDs-ZIF) within a polyacrylamide matrix, the hydrogel integrates multiple enzyme-mimicking activities, including peroxidase (POD), oxidase (OXD), catalase (CAT), and superoxide dismutase (SOD). The catalytic activities are tunable and stimulus-enhanced under multi-wavelength photoexcitation (UV/Vis/NIR) and ultrasound-induced piezoelectric stimulation. Band-structure analysis, ultraviolet photoelectron spectroscopy (UPS), electron spin resonance (ESR) spectroscopy, and transient photocurrent response collectively support an S-scheme charge-transfer pathway, in which interfacial electric-field-assisted charge separation promotes reactive oxygen species generation and conversion. As a result, the hydrogel achieves 92.5% Rhodamine B degradation within 5 min under combined UV/ultrasound stimulation and exhibits 96.47% antibacterial efficiency against Staphylococcus aureus . In addition, an infected diabetic wound model demonstrates accelerated wound closure, suggesting the potential of this adaptive catalytic hydrogel for antibacterial tissue repair. This work provides a rational strategy for designing smart, energy-stimulated hydrogel nanozymes for environmental remediation and biomedical applications. Download: Download high-res image (173KB) Download: Download full-size image
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高影响因子
CERAMICS INTERNATIONAL
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2019
·
IF 3.45
Wei Wang,Jiaojiao Fang
Semiconductor-based heteronanostructures with wide light absorption and efficient electron-hole separation properties exhibit great potential for photocatalytic applications. Here we employ the mesoporous SiO 2 nanoparticles as the template to simultaneously exfoliate the nano-confined g-C 3 N 4 and deposit the CdS nanoparticles to form a series of core-shell SiCN@CdS heteronanostructures for photocatalytic H 2 production under the visible light irradiation. Based on the physicochemical characterizations, we have been able to discuss the compositions, structures, and properties of the core-shell photocatalysts . Benefiting from the optimized equilibrium state of a relative high specific surface area, light absorption, crystalline degree, and a homogeneous dispersion of the outer CdS nanoparticles, the SiCN@2CdS exhibits the highest photocatalytic activity and stability for H 2 production under the visible light irradiation. Results also suggest that the existence of the SiO 2 template is benefit to suppress the aggregation and improve the recyclability of the core-shell photocatalysts when they are applied in the aqueous phase. The present study suggests a new sight on the template-assisted designing and synthesizing high-reactive, low-cost, environmental-stable, and easy-recyclable photocatalysts by precisely controlling the microstructures.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Yawen Cai,Ming Fang,Ying Xu,Muhammad Wakeel,Baowei Hu,Xiangke Wang
The complexity of real-water environments urged us to explore efficient photocatalytic systems for U(VI) extraction, especially considering the robustness against variable environmental factors. Herein, a type II heterojunction was engineered by integrating ultrathin g-C 3 N 4 nanosheets and CdS nanoparticles (GCN-3CS) for visible-light-driven U(VI) extraction without sacrificial agent in both aerobic and O 2 -free environments. GCN-3CS demonstrated broad pH adaptability, achieving ~95 % of U(VI) removal efficiency after 120 min of illumination at pH 4.0, while revealing accelerated kinetics at pH 5.0–8.5 with over 95 % of U(VI) elimination reached within just 60 min of visible-light irradiation. The photocatalytic performance of GCN-3CS exhibited temperature dependence, achieving over 95 % of U(VI) removal within 30, 45, and 60 min at 50, 35, and 20 °C, respectively. GCN-3CS showed exceptional tolerance to high salinity (up to 1.0 M NaNO 3 ) and excellent anti-interference capability against various coexisting ions. The reusability and environmental adaptability of GCN-3CS were validated and attained the satisfied performance. Furthermore, mechanistic studies based on macroscopic experiments and spectral characterizations revealed that the extraction of U(VI) was controlled by photocatalytic reduction-oxidation under aerobic conditions and solely by photocatalytic reduction under O 2 -free conditions. This work advanced the design of ideal photocatalyst for U(VI) extraction from complex water environments and provided a feasible strategy for managing water radioactive contaminations through the tunable heterojunction engineering.
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高影响因子
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