JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 28
·期 24
·18542-18550
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IF 2.019
Wu Huating,Ding Xingeng,Li Wenqi,Ren Chunrong,Yang Hui
In this study, a magnetic Fe 3 O 4 /SiO 2 /BiOBr composite photocatalyst was controllably synthesized a PVP-assisted solvothermal method. The Fe 3 O 4 /SiO 2 /BiOBr composites are composed of many three-dimensional (3D) flower-like BiOBr microspheres loaded with many spherical Fe 3 O 4 particles. The formation mechanism and effect of PVP’s concentration on the products were investigated and proposed. Experimental results showed that PVP might act as a potential crystal plane inhibitor in the system as well as the stabilizer on the surface of BiOBr nanoplates. The Fe 3 O 4 /SiO 2 /BiOBr displayed high photocatalytic activity for the degradation of RhB under visible light irradiation, after which it can be easily recovered by applying an external magnetic field. Moreover, the as-prepared photocatalyst exhibited excellent stability and reusability in the cycled experiments.
研究领域:
材料科学
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环境科学
·
化学
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高影响因子
Coatings
·
2026
·Vol. 16
·期 1
·138
·
IF 2.8
Hadja Kaka Abanchime Zenaba,Mi Long,Xue Liu,Mengying Xu,Wen Luo,Tian Zhang
Developing efficient heterojunction photocatalysts is essential to address the challenge of degrading persistent organic pollutants. In this study, a multi-scale characterization strategy was employed to investigate the implications of interfacial connectivity between synthesized graphitic carbon nitride (g-C3N4) /bismuth oxychloride (BiOCl)e removal of Rhodamine B (RhB) and Methyl Orange (MO). Morpho-structural characterizations, including Scanning/Transmission Electron Microscopy (SEM/TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and N2physisorption (Brunauer–Emmett–Teller (BET)) analyses, confirmed the successful construction of an intimate interfacial contact between g-C3N4and BiOCl. The optimized composite (15% g-C3N4/BiOCl), prepared via a one-step hydrothermal method, exhibited enhanced photocatalytic performance following pseudo-first-order kinetics described by the Langmuir–Hinshelwood model, with apparent rate constants of 0.166 min−1for MO and 0.519 min−1for RhB. Under visible-light irradiation, degradation efficiencies of 98% for MO (120 min) and 99% for RhB (35 min) were achieved, outperforming the pristine components. Complementary optical and electrochemical analyses indicate improved light absorption and charge-separation efficiency in the heterojunction system. In addition, the photocatalyst demonstrated good operational stability over four consecutive cycles, maintaining 91.70% activity for MO and 99.76% for RhB. Overall, this work highlights the synergistic photocatalytic g-C3N4/BiOCl heterojunction and provides a valuable insight to guide the design of advanced materials for pollutant remediation.
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APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Bolin Zhu,Xuefei Li,Jihui Lang,Yue Wang,Jinghai Yang
Photocatalytic technology has a wide range of application prospects, but due to the low degradation efficiency of photocatalytic materials at the present stage, difficult to recycle and other problems, seriously restricted its development, so it is urgent to prepare the efficient photocatalytic material. This article reports a novel metal-freephotocatalyst of the construction of graphene oxide (GO)/graphite-phase carbon nitride (g-C 3 N 4 ) heterojunction on carbon cloth (CC). The GO/g-C 3 N 4 /CC photocatalyst has excellent degradation rate of Rhodamine B (RhB) in the visible light. Due to the formation of a heterojunction between g-C 3 N 4 and GO , the light absorption of the photocatalyst was improved and the rapid recombination of photocarriers was reduced. After 5 cycles, there was no significant reduction in photocatalytic activity. We designed a new type of multi-layer membrane filter photocatalytic reactor, RhB put into the device to simulate the flow of waste water and degrade. The results show that the filter film photocatalyst shows good photocatalytic activity of RhB degradation. The introduction of carbon cloth substrate solves the problems of separation and cycle life of this photocatalyst.
研究领域:
材料科学
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环境催化
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光催化
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纳米材料
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废水处理
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2024
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IF 4.4
Xiaohua Zheng,Chenbin Cai,Shihui Lu,Mengnan Xu,Wei Chen,Fanger Yang
Recently, the photocatalytic degradation of organic pollutants has gained increasing attention because of its high efficiency and lack of secondary pollution; however, problems such as rapid electron–hole recombination affect its degradation efficiency. In this study, a novel dual Z-scheme g-C 3 N 4 /Ag 2 MoO 4 /AgBr heterojunction was successfully prepared using a one-step room-temperature precipitation method, with its photocatalytic activity evaluated by degrading rhodamine B (RhB) and tetracycline hydrochloride (TCH). The composition and surface morphology of the ternary catalysts—characterized using X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Brunauer–Emmett–Teller (BET) tests, and X-ray photoelectron spectroscopy (XPS)—confirmed the successful loading of Ag 2 MoO 4 and AgBr onto g-C 3 N 4 . Catalytic degradation results showed that the ternary catalyst exhibited the best performance at a 40 % mass fraction of AgBr. Moreover, the ultraviolet–visible diffuse reflectance spectra (UV–Vis DRS), photoluminescence (PL), electrochemical impedance spectroscopy (EIS), and transient photocurrent response test results show that the ternary catalyst has excellent optical properties. In addition, the significant improvement in the catalytic performance can be attributed to the effective charge separation of the dual Z-scheme photocatalytic mechanism based on radical trapping experiments, electron spin resonance (ESR) analysis, and energy band analysis. Hence, this study provides a new approach to studying more efficient photocatalysts.
研究领域:
环境科学
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材料科学
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高影响因子
Journal of Pharmaceutical Analysis
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2026
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IF 11.2
Man Zhang,Shanshan Zhai,He Gao,Tong Sun,Kaixin Liu,Wenshuang Wang,Yuanyuan Hou,Gang Bai
Acute pulmonary inflammation, a major cause of morbidity and mortality, involves complex immune responses and increased vascular permeability. Conventional imaging techniques for assessing pneumonia and monitoring vascular leakage have limitations in spatial resolution and practicality. Rhodamine B-conjugated poly-L-lysine (RhB-PLL) self-assembled nanoparticles (NPs) were synthesized for targeting mitochondria and sensing vascular permeability. Dynamic spatiotemporal imaging analysis stratifies the progression of acute pneumonia into four distinct stages. Six phosphatidylcholine metabolites, exhibiting stage-dependent variations, were proposed as potential biomarkers to support RhB-PLL detection. Subsequently, Fuzheng Jiedu decoction (FZJD) was used as a model to validate the rationale of syndrome-specific treatment for pneumonia. Three simplified prescriptions derived from FZJD showed unique advantages at different stages. Xiaochaihu decoction (XCH) relieved inflammation and oxidative stress in mild to moderate cases; Sanren decoction (SR) reduced vascular leakage and prevented pulmonary edema in moderate to severe cases; Maxingshigan decoction (MXSG) improved mitochondrial function, prevented microcirculatory disorders in severe to critical cases. The combined prescription, FZJD, mitigated disease progression in mild to moderate cases and demonstrated the benefits of overall intervention. This conclusion was further substantiated by metabolomics cluster analysis. Real-time RhB-PLL multimodal imaging enables precise visualization and detection of inflammation progress, facilitates therapy assessment, and enhances the understanding of multicomponent drug combinations.
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JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 30
·14953-14964
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IF 3.553
Lv Bo,Xia Lihong,Yang Yu,Wang Xiaoming,Yin Chen,Li Yaoping,Zhang Fuqin
Carbon fibers (CFs) and TiH 2 were used as raw materials to grow TiC on the surface of CFs in a molten salt system. After hydrothermal reaction with sodium hydroxide, part of TiC was converted into sodium titanate. The sodium ions were substituted by H + by the hydrochloric acid solution treatment. CFs@TiC/TiO 2 composite was generated after high-temperature treatment. XRD, Raman, XPS, SEM, and AFM were used to characterize the structure and morphology of the composites. Results showed that a porous TiC film layer was homogeneously formed which was evenly wrapped on the surface of CFs. Through hydrothermal, displacement, and calcination processes, part of TiC was transformed into anatase TiO 2 with controllable morphology. Photocatalytic degradation experiments by the composite catalysts were carried out. The chemical reactions involved in the formation of composite structures and their effects on photocatalysis were analyzed and discussed. Notably, the morphology characteristics of the heterogeneous structure has a marked impact on the photocatalytic degradation of organic pollutants and photocatalytic reduction of hexavalent chromium [Cr(VI)]. Furthermore, the composites can be easily recycled and reused with good reactivity.
研究领域:
材料科学
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环境科学
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JOURNAL OF SOLID STATE CHEMISTRY
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2024
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IF 3.2
Rui Cao,Xinxin Li,Teng Zhang,Hanxiao Tang,Ying Song,Zhijuan Zhang,Weisheng Feng
The development of metal ion detection probes with high sensitivity and selectivity is of utmost importance for the promotion of public health and environmental sustainability. In this work, a series of ratiometric fluorescent probes (RhB@UiO-67-NH 2 ) were successfully prepared using a one-pot method for the detection of metal ions, particularly As 5+ and Fe 3+ . Notably, the ratiometric fluorescent probe RhB@UiO-67-NH 2 (1:4) demonstrates dual functionality as a Fe 3+ turn-off probe and an As 5+ turn-on probe. The limits of detection (LODs) for As 5+ and Fe 3+ using RhB@UiO-67-NH 2 (1:4) were determined to be 0.521 μM (39.03 ppb) and 0.107 μM (5.97 ppb), respectively, which were the lowest records of reported LMOFs so far. The fluorescence quenching of Fe 3+ can be attributed to various mechanisms such as fluorescence resonance energy transfer (FRET), photoinduced electron transfer (PET), and competitive absorption (CA). Additionally, the fluorescence enhancement of As 5+ is primarily due to absorbance-caused enhancement (ACE) and PET. Moreover, the composite material RhB@UiO-67-NH 2 (1:4) exhibited excellent anti-interference capability and reproducibility for detecting Fe 3+ and As 5+ . The removal efficiency of As 5+ by RhB@UiO-67-NH 2 (1:4) exceeded 50.9 % when the initial concentration of As 5+ was below 20 mg/L. This work presents a valuable reference for future investigations and utilization of As 5+ and Fe 3+ sensing.
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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高影响因子
Advanced Energy and Sustainability Research
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2024
·
IF 6.2
Hong Tu,Ying Xu,Shun-shun Chen,Ya Wang,Sheng-xin Guo,Jian Wu
The high catalytic activity of photocatalysts is greatly influenced by the efficient separation of photogenerated charge carriers. In this study, six g-C 3 N 4 -based COFs are designed and synthesized, and CN-203 is identified as the most efficient photocatalyst through experimental screening. Quantitative measurements reveal that singlet oxygen production is ≈100 times that of ·O 2 − and 5000 times that of ·OH. When combined with PMS, CN-203 exhibits degradation rates for RhB and TC that are ≈30 ( k = 0.0293 s −1 ) and 10 ( k = 0.2940 min −1 ) times faster than those of CN550(RhB, k = 0.0531 min −1 ; TC, k = 0.0301 min −1 ), respectively. Structural simulations and calculations show that the modified CN-203 have better electron–hole separation in the excited state, and the energy gap between HOMO and LUMO is significantly reduced after modification. The study also revealed the structure–function relationship between the modification of the same site with different functional groups and its effect on photocatalysis. Overall, this study provides valuable insights into the relationship between surface structure and photocatalytic applications.
研究领域:
材料科学
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化学
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环境科学
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高影响因子
Journal of Environmental Sciences
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2023
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IF 6.9
Lei Zheng,Lixia Sun,Jiangbo Qiu,Junling Song,Luyi Zou,Yue Teng,Yongzhong Zong,Hongyan Yu
The coexistence of inorganic and organic contaminants is a challenge for real-life water treatment applications. Therefore, in this research, we used NH 2 -MIL-125(Ti) to evaluate the single adsorption of hexavalent chromium (Cr(VI)) or Rhodamine B (RhB) in an aqueous solution and further investigate simultaneous adsorption experiments to compare the adsorption behavior changes. The main influencing factors, for example, reaction time, initial concentration, reaction temperature, and pH were studied in detail. In all reaction systems, the pseudo-second-order kinetic and Langmuir isotherm models were well illuminated the adsorption progress of Cr(VI) and RhB. Thermodynamic studies showed that the adsorption process was spontaneous and endothermic. As compared to the single system, the adsorption capacity of Cr(VI) in the binary system gradually decreased as the additive amount of RhB increased, whereas the adsorption capacity of RhB in the binary system was expanded brilliantly. When the binary reaction system contained 100 mg/L Cr(VI), the removal rate of RhB increased to 97.58%. The formation of Cr(VI)-RhB and Cr(III)-RhB complexes was the cause that provided facilitation for the adsorption of RhB. These findings prove that the interactions during the water treatment process between contaminants may obtain additional benefits, contributing to a better adsorption capacity of co-existing contaminant.
研究领域:
环境科学
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化学工程
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2026
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IF 6.9
Xilin Wang,Boxiang Zhang,Longfei Xia,Ping Dai,Yuqing Zhao,Liang Zhou,Dongyan Xu
Background Red mud is the world’s most extensively generated waste in the non-ferrous metal industry, posing significant environmental risks due to its strong alkalinity and lack of effective disposal methods. It is urgent to find a reasonable and effective strategy to transform red mud into a Heterogeneous catalyst for environmental remediation. Methods α-MnO 2 nanorods were anchored on biochar-modified red mud composite (RMBC) via the hydrothermal method and utilized as a catalyst to activate PMS for the degradation of Rhodamine B (RhB). Reactive oxygen species generated during the catalytic process was identified through EPR, XPS, and Raman spectroscopy measurements. Degradation intermediates of RhB were identified using LC-MS. Furthermore, the ecotoxicity of RhB and its transformation products was evaluated using the ecological structure-activity relationship (ECOSAR) prediction model. Significant findings The as-prepared α-MnO 2 /RMBC achieves a remarkable RhB degradation efficiency of 98.6 % within 30 min, significantly outperforming control samples including α-MnO 2 /RM, α-MnO 2 /BC, and the mixture of α-MnO 2 /RM and α-MnO 2 /BC, suggesting a pronounced synergistic interaction between α-MnO 2 and RMBC. Mechanistic analysis reveals that RhB degradation is predominantly governed by an activated surface-PMS inner-sphere complex, signified as Mn III (s) -(O)OSO– 3. Furthermore, the Fe II species inherent to RM facilitates the redox-mediated reduction of Mn IV to Mn III , thereby sustaining the catalytic activity of active Mn III sites and enabling robust recyclability and reusability of the α-MnO 2 /RMBC catalyst.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.3
WU Xiaocui,Kan Chen,Wenxiu Xue,Fenghao Sun,Huiying Yang,Zhaojie Cui
Organic dye pollutants have posed a significant threat to aquatic ecosystems. Graphitic carbon nitride (g-C 3 N 4 ), as a metal-free photocatalyst with broad application potential, has been widely explored for the degradation of environmental pollutants. However, its practical efficiency is severely limited by a low specific surface area and a high recombination rate of photogenerated electron-hole pairs. Furthermore, its performance is highly sensitive to synthesis parameters such as method, temperature, and precursor ratio. To address this, this study developed a multilayer perceptron-artificial neural network (MLP-ANN) model to quantify parameter impacts on Rhodamine B (RhB) degradation rate, integrating four synthesis methods (template-free, soft/hard/self-template), material characterization, and mechanistic analysis. MLP-ANN (R 2 =0.9774, outperforming random forest R 2 =0.563) identified melamine (FI=0.33), urea (FI=0.19), and silica template (FI=0.11) as key factors (for porous structure) and catalyst concentration (FI=0.17, increasing active sites) as dominant in reactions. Guided by the model, self-template g-C 3 N 4 (g-C 3 N 4 -SeT) showed optimal performance: k= 0.0613 min −1 , ∼100 % RhB degradation (43.8 times better than template-free g-C 3 N 4 -TF). SEM/TEM confirmed uniform porosity in g-C 3 N 4 -SeT, while UV-Vis DRS and PL showed the enhanced visible-light absorption and suppressed carrier recombination. Superoxide radicals (•O 2 - ) were proved as the main active species. Efficient separation of electron-hole pairs by g-C 3 N 4 -SeT promotes the generation of •O 2 - , thereby accelerating RhB degradation. This work demonstrates the successful integration of machine learning with experimental characterization to optimize both the synthesis strategy and photocatalytic performance of g-C 3 N 4 , establishing a data-driven framework for the rational design of advanced functional catalysts.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 32
·24944-24952
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IF 3.84
Xinshan Rong,Fengxian Qiu,Jie Yan,Hao Zhao,Xiaolu Zhu,Dongya Yang
A coupled system for the photodegradation of Rhodamine B dye was realized using a Bi2S3/g-C3N4 composite as a photocatalyst under visible light irradiation. The Bi2S3/g-C3N4 composite was prepared by a hydrothermal method and characterized by Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Compared with pure g-C3N4, the Bi2S3/g-C3N4 sample exhibits an enhanced photocatalytic activity and the best photocatalytic efficiency is 3.68 times more than that of pure g-C3N4. The obtained results indicate that a coupled system of Bi2S3 and g-C3N4 could overcome the drawback of low photocatalytic efficiency brought by electron–hole recombination and a narrow photoresponse range. On the basis of the corresponding energy band positions, the mechanism of photocatalytic activity enhancement was proposed.
研究领域:
材料科学
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环境科学
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高影响因子
危险品化学品经营许可证（带存储）