APPLIED ORGANOMETALLIC CHEMISTRY
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2018
·Vol. 33
·期 3
·e4683
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IF 3.581
Jiang Li,Xiaolu Zhu,Fengxian Qiu,Tao Zhang,Fengping Hu,Xiaoming Peng
Introducing plasmonic metals into semiconductor materials has been proven to be an attractive strategy for enhancing photocatalytic activity in the visible region. In this work, a novel and efficient Ag/Ag 2 WO 4 /g-C 3 N 4 (AACN) ternary plasmonic photocatalyst was successfully synthesized using a facile one-step in situ hydrothermal method. The composition, structure, morphology and optical absorption properties of AACN were investigated using X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and UV–visible diffuse reflectance spectroscopy, respectively. Photocatalytic performance of AACN was evaluated via rhodamine B and tetracycline degradation. The results indicated that AACN had excellent photocatalytic performance for rhodamine B degradation with a rate constant of 0.0125 min −1 , which was higher than those of Ag 2 WO 4 and Ag/Ag 2 WO 4 . Characterization and photocatalytic tests showed that the strong coupling effect between the Ag/Ag 2 WO 4 nanoparticles and the exfoliated ultrathin g-C 3 N 4 nanosheets was superior for visible-light responsivity and reduced the recombination rate of photogenerated electrons and holes. A proposed mechanism is also discussed according to the band energy structure and the experimental results.
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
RSC Advances
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2022
·Vol. 12
·期 55
·35905-35922
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IF 4.036
Liyan Wang,Zhiqiang Miao,Fei Bi,Shanshan Xiao,Li Zhao,Yongtao Li,Lingwei Kong,Yingqi Li,Jingxiu Yang,Xuejian Zhang,Guangqing Gai
BiOCl hierarchical microspheres assembled from nanosheets with exposed {001} facets were successfully synthesized using PEG-2000 as template by a one-pot room-temperature hydrolysis method. The PEG-modified BiOCl photocatalyst exhibits a significantly enhanced RhB photosensitized degradation activity under visible light. After 10 min white LED irradiation, the degradation efficiency of RhB by the PEG-modified BiOCl sample S0.07 reaches 99.5%. The degradation rate constant of the PEG-modified sample S0.07 over RhB is 0.4568 min−1, which is 6.76 times that of the unmodified sample S0 (0.0676 min−1). After 4 min of xenon lamp (λ ≥ 420 nm) irradiation, the degradation rate of RhB by S0.07 is almost 100%. The exposed {001} facets with surface defects contribute to the superior adsorption capacity of BiOCl towards RhB, which immensely accelerates the electron transfer efficiency from the excited RhB into the conduction band of BiOCl, forming superoxide radical (˙O2−) active species to degrade the pollutants. Moreover, the superior RhB-sensitized BiOCl system provides high photocatalytic degradation activity over MO. This work provides a facile and efficient BiOCl synthesis method that is conducive to large-scale production and simultaneously opens up new ideas for the synthesis of other photocatalysts.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yiqun Chen,Xiaori Huang,Dedong Sun,Hongchao Ma,Guowen Wang,Chun Ma,Jun Hao
In this study, the Fe 3 O 4 /Co 3 [Co(CN) 6 ] 2 composite catalyst was synthesized by co-precipitation method. The morphology and the structure of Fe 3 O 4 /Co 3 [Co(CN) 6 ] 2 composites were characterized by XRD, FTIR, SEM, TEM, EDS, XPS, VSM. The results showed that the removal rate of RhB (10 mg/L) reached 99.5% in 40 min in the 0.4-Fe 3 O 4 /Co 3 [Co(CN) 6 ] 2 (200 mg/L) + PMS (50 mg/L) system with a pseudo first-order degradation rate constant (k) of 0.121 min −1 , which is nearly 2.16 times of that (0.0561 min −1 ) in the Co 3 [Co(CN) 6 ] 2 + PMS system and 18.9 times of that (0.0064 min −1 ) in the Fe 3 O 4 + PMS system. The observed synergistic catalysis between Fe 3 O 4 and Co 3 [Co(CN) 6 ] 2 in Fe 3 O 4 /Co 3 [Co(CN) 6 ] 2 enhanced the degradation of RhB. The electron paramagnetic resonance (EPR) analysis and quenching experiment indicated that SO 4 − and OH played important roles in the degradation process of RhB. A synergistic catalytic mechanism of PMS activation by Fe 3 O 4 /Co 3 [Co(CN) 6 ] 2 , which mainly involves the enhanced Co 2+ /Co 3+ cycle by Fe 2+ donated electrons, was proposed. In summary, owing to its easy preparation, excellent catalytic activity, and reusability, the Fe 3 O 4 /Co 3 [Co(CN) 6 ] 2 composite catalyst is a good candidate for remediation of contaminated water.
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
JOURNAL OF RARE EARTHS
·
2022
·
IF 4.632
Zhixiong Song,Shuwen Yu,Kaixian Wang,Zhengming Jiang,Liyan Xue,Fan Yang
In this work, a novel Sc-doped Bi 3 TiNbO 9 ferroelectric nanofiber was first prepared by electrospinning. The nanofibers are approximately 100 nm level in diameter. The photocatalytic activity analysis reveals that the Bi 3 TiNbO 9 nanofibers synthesized by electrospinning are superior to powders prepared by the solid-state method, which is mainly attributed to the high specific surface area and high surface activity of the nanofibers. In addition, doping Sc can reduce the band gap of Bi 3 TiNbO 9 and further improve the photocatalytic efficiency. Bi 3 TiNbO 9 nanofibers containing 5 mol% Sc have the highest photocatalytic activity, which can degrade 98.55% of RhB under 405 nm light irradiation for 120 min. In addition, the catalytic mechanism of the catalyst was obtained by scavenger tests, active species capture tests and band structure analyses. After three cycles of photocatalytic experiment, the degradation rate is decreased by only 2.42%, proving that the nanofibers catalyst has excellent stability. This work provides good prospects for the practical application of electrospinning technology in the field of photocatalysis.
研究领域:
材料科学
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纳米技术
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环境科学
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光催化
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产品关联
DOI
高影响因子
NANO
·
2015
·
IF 1.09
XIAOLEI SI,GUANGLIANG CHEN,ZHILI CHEN,JUN HUANG,SHIHUA CHEN,SYLVAIN MASSEY
In this paper, a highly catalytic and nanosized Ag / Co 3 O 4 composite for rhodamine B ( RhB ) degradation was fabricated by using the co-precipitation method at room temperature. The Ag / Co 3 O 4 structure and catalytic properties were characterized through scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) gas-sorption measurements, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-Vis spectroscopy. The results showed that the Co 3 O 4 nanosheets prepared by hydrothermal synthesis mainly exposed (2 2 0) and (1 1 1) facets, which played an important role in determining its catalytic oxidation performance. The Co 3 O 4 nanosheets doped with Ag nanoparticles by a simple silver-mirror reaction exhibited a stable and well-dispersed property in dye solution. Compared to the Ag and Co 3 O 4 nanostructure, the Ag nanoparticles with bigger diameter (10 nm) on Co 3 O 4 surface also readily produced surface-active oxygen species and exhibited a higher catalytic activity for the degradation of RhB solution (5 mg ⋅ L -1 ) under the visible light. The kinetic constant K of Ag / Co 3 O 4 catalyst for RhB degradation reaction was evaluated to 0.02724 min -1 , which is relatively higher than those reported in the literatures.
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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 22
·17587-17598
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IF 2.779
Yu Bo,Miao Chun,Wang Dandan,Li Hongji,Sun Dongshu,Jiang Wei,Liu Chunbo,Che Guangbo
The development of high-efficiency heterojunction with improved photocatalytic property is regarded as a promising way to decontaminate wastewater. In this study, Z-Scheme g-C 3 N 4 /H-TiO 2 heterojunctions with different proportions were synthesized. The photocatalytic degradation of rhodamine B (RhB) was studied under visible light irradiation. Among them, 10% g-C 3 N 4 /H-TiO 2 photocatalyst had the best performance, and the degradation rate of RhB was 65% within 120 min. In addition, 10% g-C 3 N 4 /H-TiO 2 photocatalyst had high stability, and its photocatalytic activity did not decrease significantly after four cycles. Through photocurrent analysis, it is found that the photogenerated carriers have obviously excellent separation and transfer characteristics, which makes the 10% g-C 3 N 4 /H-TiO 2 photocatalyst have good degradation performance. Electron paramagnetic resonance (ESR) experiments showed that ·OH and ·O 2 − were active radicals during degradation.
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
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Rui Guo,Xinyu Liu,Tianyi Dong,Jinsong Li,Zuju Shu,Zhongbo Li,Lijun Zhang
Rhodamine B (RhB) is a synthetic organic xanthene dye that is harmful to human health. RhB can easily be illegally added to food as a colorant due to its cheap and abundant. This work presents a molecularly imprinted (MIP) electrochemical sensor for the determination of RhB by modifying ZIF-67-derived N-doped carbon composite interconnected by MWCNTs (NC@MWCNT) and MIP on the surface of glassy carbon electrode. The sensor exhibited excellent performance for RhB detection due to the outstanding conductivity of NC@MWCNT and the specific adsorption of MIP. Under optimized conditions, the sensor had a wide linear response range (0.001–1000 nM) and a low detection limit of 1 pM. The sensor exhibits remarkable selectivity and can distinguish RhB molecules from dye molecules with similar structures and common metal ions. This work introduces a simple, economical, sensitive, and selective electrochemical detection method for RhB trace detection.
研究领域:
分析化学
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食品科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Shu Wang,Xin Li,Yiwei Wang,Wenlong Yang,Shuang Han,Hui Zhang
The persulfate (PMS)-activated photo-Fenton system has emerged as a promising solution for addressing severe environmental contamination, owing to its efficient generation of strongly oxidizing free radicals. Herein, we present a magnetically recyclable CdS/CoFe 2 O 4 S-scheme heterostructure with broad-spectrum response, demonstrating exceptional performance in degrading ciprofloxacin (CIP) and high-concentration rhodamine B (RhB). A mild synthesized strategy was used to construct CdS/CoFe 2 O 4 composite, meanwhile, experimental characterizations and theoretical calculations were combined to exhibit the phase structure, interface heterojunction, surface chemical state, energy band structure, surface photovoltage, charge transfer mechanism, and magnetic property. In our work, the best degradation rates of CIP and RhB are 5.63 μmol·min −1 ·g -1 cat. and 13.91 μmol·min −1 ·g -1 cat. , respectively, with the contribution order of reactants to be h + >·SO 4 - >·O 2 – >·OH, which proves a synergy effect on the production of reactive oxygen free radicals and available photogenerated charge to boost the photo-Fenton applications. This work opens a new avenue for the construction of low-cost, high-efficiency, and magnetic recycling semiconductor heterojunction for enhanced photo-Fenton applications.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2025
·
IF 4.6
Shenglong Chen,Qiang Zhou,Xiaojing Liu,Hongyan Guan,Peng Dong,Hongman Hou,Gongliang Zhang,Jingran Bi,Shuang Yan,Hongshun Hao
In this study, a novel Z-scheme ZnO-AgCl-Ag photocatalyst was prepared by converting the metal-organic framework ZIF-8 to ZnO via a simple pyrolysis method and using a physical wet mixing method. The crystal structure, microstructure, elemental distribution, and photoelectrochemical properties of the catalyst were systematically characterized using various analytical techniques. The characterization results showed that the introduction of AgCl/Ag into ZnO exhibited a higher light absorption capacity as well as a lower transmission resistance. Photocatalytic degradation experiments showed that the ZA-3 sample achieved a 99.97 % degradation rate of 10 mg/L RhB in 24 min, which was 2.3 higher than that of ZIF-8-derived ZnO. In addition, we systematically investigated the effects of initial RhB concentration, solution pH, anion interference, and catalyst recycling cycle on the photocatalytic activity, demonstrating the stability and applicability of the composites under different conditions. In addition, radical trapping experiments were conducted to probe the photocatalytic reaction mechanism, and a Z-scheme charge transfer pathway was confirmed, in which photogenerated electrons were effectively separated and transferred at the Z-scheme heterojunction interface through the conductive channel of Ag nanoparticles as carriers, which significantly improved the photocatalytic activity. In this study, the advantages of MOFS were rationally and effectively utilized to design and prepare Z-scheme photocatalysts with UV–visible response.
研究领域:
材料科学
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环境科学
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纳米技术
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光催化
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2026
·
IF 4.7
ShuHuan Chen,Panweiyi Wang,Teshale Ayano Begeno,Afaq Nazir,ZhenXia Du,Shuping Qu
Luminescent metal-organic frameworks (LMOFs) have emerged as promising materials for optical sensing, owing to their tunable luminescent properties. However, most existing LMOF-based sensors rely on single-wavelength fluorescence intensity changes, which suffer from poor resistance to environmental fluctuations due to the absence of auxiliary reference signals, limiting their accuracy, especially for trace ammonia(NH 3 ) below the human olfactory threshold, which evades sensory perception yet poses long-term risks. To address this limitation, UIO-67-x where x denotes the molar ratio of terephthalic acid (H 2 BDC) to biphenyl-4,4`-dicarboxylic acid (H 2 BPDC) was designed. By optimizing the ligand ratio, UIO-67-0.2 was synthesized with well-defined crystallinity, large specific surface area and high fluorescence emission peak intensity. Its regular structure enables efficient encapsulation of rhodamine B (RhB) forming the dual-emission [email protected] platform. This platform has two adjustable emission peaks, both of which respond sensitively and synchronously to ammonia, thereby strengthening signal reliability and anti-interference capability through dual-channel synergistic verification. Notably [email protected] achieves an ultra-low NH 3 limit of detection (LOD) of 0.2 ppm, far below the olfactory threshold, and maintains remarkable stability after 5 cycles with stable reusability. Combining experiments and Density functional theory (DFT) calculations the quenching mechanism is clarified as the synergistic effect of static quenching and charge transfer. A [email protected] drop-cast film exhibits naked-eye distinguishable color change at 2.5 ppm NH 3 under 365 nm Ultraviolet(UV) light. It remains unchanged with other volatile organic compounds (VOCs) and shows concentration-dependent color gradation for semi-quantitative assessment. Furthermore, Digital conversion of fluorescence color signals via ΔE analysis enabled truly quantitative ammonia detection with a linear calibration curve ( R 2 = 0.968), eliminating the subjectivity of naked-eye judgment. This work develops a dual-mode LMOF for sub-olfactory-threshold NH 3 detection and informs anti-interference dual-emission platform design enabling on-site low-cost monitoring.
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2015
·
IF 7.435
Peng Yi-Zhu,Ma Wan-Hong,Jia Man-Ke,Zhao Xiao-Rong,David M. Johnson,Huang Ying-Ping
In this study, a weakly polar pesticide acetochlor in water was tried to degrade by BiOBr catalysts under visible light irradiation. Its degradation reaction rate increased exponentially with increasing catalyst dosage, which was significantly different from conventional photocatalytic patterns established for polar or water-soluble pollutants. Thus, the rate-dosage relationship of BiOBr/acetochlor was compared to that of BiOBr/Rhodamine B (RhB) (a typical strong polar dye pollutant in water) at different BiOBr dosages. The degradation rate of RhB increased with the BiOBr dosage and then plateaued due to more catalyst particles blocking the light into the inner solution, which is a typical behavior for heterogeneous photocatalysis of polar organic compounds in aqueous solution. While acetochlor behaved differently, its degradation rate increased exponentially with the BiOBr dosage, and no plateau was observed even up to 9.0 g/L BiOBr dosage. This special rate-dose relationship for weakly polar acetochlor was correlated with a unique adsorption property of BiOBr to acetochlor in water solution. There was a re-distribution effect that always exclude excessive acetochlor adsorbed on BiOBr surface regardless either substrates or BiOBr overdose. This finally resulted in every BiOBr particle having enough adsorption sites available for dissolved dioxygen to function thereby accelerate the degradation of weakly polar organic compounds in water.
研究领域:
环境化学
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光催化
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水污染控制
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环境功能材料
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污染物降解机制
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Tong Yan,Yuqi Liu,Han Chen,Qi Wang,Xinying Wang,Yusi He,Baizhuang Li,Biao Li,Yuebin Feng,Huilong Luo,Wei Li
Cobalt-based materials have been demonstrated to be effective heterogeneous catalysts for peroxymonosulfate activation in degrading many refractory organic pollutants. In this study, a new cobalt-based catalyst was prepared using cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) as the Co 2+ source, 2,3-pyrazine dicarboxylic acid and 3,6-DI-4-pyridyl-1,2,4,5-tetrazine (4-PYTZ) as ligands. This catalyst was employed as a peroxymonosulfate activator for the degradation of Rhodamine B(RhB). The results indicated that the prepared Co-based catalyst can effectively degrade RhB dye in aqueous solution by activating peroxymonosulfate (PMS). Specifically, when the initial concentration of RhB was 20 mg/L, its degradation rate exceeded 98 % within merely 9 min. The factors influencing the activation of PMS by the Co-based catalyst were examined, including PMS concentration, reaction temperature, solution pH, and the concentration of organic pollutants. Stability and reusability tests demonstrated that the prepared catalyst exhibited good stability, with the degradation rate of RhB remaining above 97 % after four repetitive experiments. Free radical quenching experiments and electron paramagnetic resonance (EPR) analyses revealed that sulfate radicals (SO 4 − ) and hydroxyl radicals ( OH) are the primary reactive radicals accountable for the degradation process. Additionally, it displayed excellent adaptability over a wide pH range, particularly within the pH levels ranging from 5 to 9. This study demonstrates that the prepared Co-based catalyst can serve as a stable and effective option for degrading organic dyes in wastewater treatment applications.
研究领域:
环境科学
·
催化材料
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）