PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Xiaoqian Ji,Wan Zhang,Fangqing Ge,Chaoxia Wang,Yunjie Yin,Kunlin Chen
A novel “off-on” terminated polyurethane based on the rhodamine B modified dye RhEA was constructed with the polyethylene glycol (PEG) and 1,4-butanediol (BDO) as soft segment, isophorone diisocyanate (IPDI) as hard segment. The RhEA terminated polyurethane turned to red from colorless after 254 nm UV induction accompanying transformation of RhEA from a twisted spirolactam to a planarized ring-opened amide. The intensity of absorbance enhanced as UV induction time increased. And the color of the RhEA terminated polyurethane changed from red turned to light red (45 °C) and colorless (65 °C), reversibly. The RhEA terminated polyurethane showed good thermal stability. The thermochromic cotton fabric was obtained with RhEA terminated polyurethane via flat screen printing and it turned to red from white after 254 nm UV induction. The K/S values decreased nearly 65.8% at 45 °C compared to 40 °C suggesting the thermochromic cotton became light red and it turned to white completely at 65 °C. The lactam ring was still retained during the printing process and the thermochromic cotton fabric possessed thermochromic behavior after UV induction. They can be a promising candidate for developing a flexible sensor to monitor environmental changes.
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ELECTROCHIMICA ACTA
·
2012
·
IF 3.832
Yunjiao Wang,Peng Liu,Chao Yang,Bin Mu,Aiqin Wang
The rhodamine B-attapulgite/polypyrrole (RhB-ATP/PPy) composites have been prepared by the in situ chemical oxidative polymerization method based on the self-assembly of pyrrole on the surface of the rhodamine B modified ATP (RhB-ATP). The morphologies of the RhB-ATP/PPy composites prepared with different feeding ratio of pyrrole and the RhB-ATP were compared with transmission electron microscope (TEM) technique. The electrochemical behaviors of the RhB-ATP/PPy composites were investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge–discharge. The results indicated that RhB did effectively improve the electrochemical performance and cycling stability of the RhB-ATP/PPy composite electrode, although RhB showed no obvious effect on the morphology of the nanocomposites . It was attributed to the fact that RhB and ATP provided a more convenient pathway to the charge carrier and RhB made the combination of the ATP and PPy much stronger. The maximum discharge capacity of the composites electrode achieved 587 F g −1 and kept 76% of its original specific capacitance after 500 cycles.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Jialong Ma,Yishuai Jing,Yuting Li,Shanbo Cui,Xin Zhao,Jiaming Song
The demand for water pollution control accelerated the development of environment-friendly technologies, e.g., photocatalysis, for resolving the pollution issue efficiently. Wide bandgap rare earth oxide semiconductors are potential photocatalysts with low toxicity for the environment, but the luminescence of rare earth ions and narrow light absorption band restrict their photocatalytic degradation efficiency. In this study, we synthesized a composite structure consisting of Eu 2 O 3 nanoparticles (NPs) and carbon-nanospheres (CNSs) by annealing both monomers in argon atmosphere together. The photocatalytic degradation performance of the composites with different mass ratios were investigated by utilizing rhodamine B (RhB) dye as the target organic pollutant. The results show that the combination with CNSs significantly improved the photocatalytic performance of Eu 2 O 3 , and the composite's highest removal efficiency reached up to 55 % within 60 min, which is competitive to those for other rare earth oxides. The improved photocatalytic degradation capacity for the composite structure was attributed to the luminescence suppression of Eu 3+ and the increased visible-light absorption by CNSs. Our research sheds light on the possible routes for enhancing the photocatalytic degradation capability of rare earth oxides in the environment pollution abatement.
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Inorganics
·
2025
·Vol. 13
·期 3
·88
·
IF 3
Jingjing Dai,Guofei Li,Yuanyuan Wang,Cancan Zhang,Hui Nan,Guijun Yang
During the process of producing potassium fertilizer from salt lake resources, a large amount of waste liquid brine, rich in raw materials such as magnesium chloride, is generated. In this work, a MoS2/MgAl-LDH composite material was constructed using the secondary hydrothermal technique. Characterizations including X-ray diffractometer (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) confirmed the distribution of MoS2nanosheets on the surface of MgAl-LDH. Under full-spectrum irradiation, the degradation efficiency of Rhodamine B reached 85.5%, which was 69.2% higher than that of MgAl-LDH alone. The results from the electrochemical, UV-Vis, and XPS-VB tests indicate that the internal electric field accelerated the separation and transportation of charge carriers between MoS2and MgAl-LDH. These findings demonstrate the great potential of MoS2/MgAl-LDH as a photocatalyst in the degradation of organic dyes, which will aid in the green recycling utilization of magnesium resources from salt lake by-products.
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JOURNAL OF MATERIALS RESEARCH
·
2025
·
IF 2.9
He Yong,Lin Wensong,Gao Ran,Zhang Yeheng,Lin Huanxia
Bi 5 O 7 I was considered as a promising photocatalyst due to its unique structure. However, the recombination rate of electron–hole pairs generated by Bi 5 O 7 I is too fast, making it impossible for practical applications. In this study, Bi 5 O 7 I catalysts deposited with various amount of silver were manufactured and their photocatalytic efficiency for rhodamine B (RhB) was measured. It was found that Bi 5 O 7 I with a silver deposition of 15% (named as Bi 5 O 7 I/Ag-15) exhibits the highest catalytic performance, with a degradation rate of 97.34% for RhB after illumination for 90 min. The cyclic test results confirmed that Bi 5 O 7 I/Ag-15 still maintained high photocatalytic activity after six cycles of degradation. In addition, Bi 5 O 7 I/Ag-15 also exhibits an excellent photocatalytic performance in acidic or alkaline environments, indicating its potential for practical applications. A reasonable degradation mechanism for RhB photocatalysis was then proposed. Graphical abstract
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhe Song,Qixuan Gao,Xiting Yue,Chunyan Xiao,Haoyi Ma,Jiatian Lu
The contamination caused by organic dyes has become a critical global environmental issue. Developing effective and sustainable methodologies for the degradation of these pollutants is of utmost importance. In this study, we successfully fabricated the AgNbO 3 /Ag 3 PO 4 heterostructure through a combination of hydrothermal synthesis and in situ precipitation techniques. We systematically assessed the photocatalytic degradation efficacy of pristine AgNbO 3 , pristine Ag 3 PO 4 , and the AgNbO 3 /Ag 3 PO 4 heterostructure on Rhodamine B (RhB) under visible light irradiation. The results indicated that within 60 min, the AgNbO 3 /Ag 3 PO 4 heterostructure achieved a degradation efficiency of 94.77 %, markedly surpassing the 13.10 % and 72.06 % efficiencies observed for pristine AgNbO 3 and Ag 3 PO 4 , respectively. The removal efficiency of TOC reached 50.76 %. This enhanced photocatalytic performance is attributed to the reduced recombination rate of photogenerated electron-hole pairs, facilitated by the heterostructure formation. Notably, the AgNbO 3 /Ag 3 PO 4 heterostructure demonstrated exceptional stability, retaining significant photocatalytic activity even after four successive cycles. Moreover, the plausible degradation pathways of RhB were explained in detail using LC-MS. This study highlights a green synthesis approach that is straightforward, eco-friendly, and cost-effective for preparing AgNbO 3 /Ag 3 PO 4 with superior photocatalytic activity and stability for dye degradation under visible light irradiation.
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LANGMUIR
·
2023
·
IF 3.9
Shuyan Qi,Ling Guan,Ruiyan Zhang,Shanqiang Wu,Kaiyao Zhang
BiOCl/Bi2Fe4O9 photocatalyst was prepared by a coprecipitation–hydrothermal method. The heterojunction structure generated by the composite of BiOCl and Bi2Fe4O9 reduced the electron–hole recombination efficiency and improved the degradation rate of RhB. At 240 min, 20% BiOCl/Bi2Fe4O9 represented the excellent degradation effect on 10 mg/L RhB; the degradation efficiency reached 99.56%; and the reaction rate constant was 0.01534 min–1, which was 5.76 times and 6.06 times that of Bi2Fe4O9 and BiOCl, respectively. The main active substance of the photocatalytic degradation of dyes was superoxide radical O2–·. Five cycles of the experiment proved the relative stability of BiOCl/Bi2Fe4O9.
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MOLECULES
·
2026
·Vol. 31
·期 13
·2270
·
IF 5.1
Kexin Ge,Shuaiqi Chen,Boning Jiang,Xuhui Wang,Xiangyu Xu,Jiaqing Song
Rhodamine B (RhB) is a typical xanthene-based cationic dye. Its widespread application has brought serious safety and environmental risks. Heterogeneous Fenton systems based on zero-valent iron (Fe0) are promising for RhB degradation. However, bare Fe0suffers from severe agglomeration and surface passivation. In this study, alumina with a large pore volume and high specific surface area was employed as a support to enhance Fe0dispersion and stability. The catalyst was prepared via a glucose-assisted carbothermal reduction method, and the formation of Fe0was confirmed by X-ray diffraction and electron microscopy analyses. Under optimal conditions (pH = 3.58, catalyst dosage = 0.8 g·L−1, H2O2= 10 mM), 10 mg·L−1RhB was completely degraded within 25 min, with a pseudo-first-order rate constant of 0.432 min−1. This exhibits a faster degradation rate and efficiency advantage. Radical quenching experiments indicated that hydroxyl radicals (•OH) were the dominant reactive species, while singlet oxygen (1O2) also contributed to the degradation process. Two primary degradation pathways, including N-deethylation and hydroxylation, were identified. The catalyst showed moderate reusability with slight deactivation after repeated cycles. This study demonstrates that tailoring the pore structure of alumina supports is an effective strategy to enhance Fe0dispersion, mass transfer, and catalytic performance in heterogeneous Fenton systems.
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PubMed
高影响因子
ACS Omega
·
2023
·
IF 4.1
Pengwei Li,Ting Zhao,Ziheng Zhao,Hanxiao Tang,Weisheng Feng,Zhijuan Zhang
In this study, one well-known CHM residue (Atropa belladonna L., ABL) was used to prepare biochar capable of adsorbing rhodamine B (RhB) with an ultrahigh surface area for the first time. Three micropore-rich ABL biochars including ABL@ZnCl2 (1866 m2/g), ABL@H3PO4 (1488 m2/g), and ABL@KOH (590 m2/g) were obtained using the one-step carbonization method with activation agents (ZnCl2, H3PO4, and KOH) via chemical activation and carbonization at 500 °C, and their adsorption performance for RhB was systematically studied with adsorption kinetics, isotherms, and thermodynamics. Through pore diffusion, π–π interaction, and hydrogen bonding, ABL biochar had excellent adsorption performance for RhB. Moreover, when C0 was 200 mg/L, biochar dosage was 1 g/L, and the contact time was 120 min; the maximum RhB adsorption capacity and removal efficiency on ABL@ZnCl2 and ABL@H3PO4 were 190.63 mg/g, 95% and 184.70 mg/g, 92%, respectively, indicating that it was feasible to prepare biochar from the ABL residue for RhB adsorption. The theoretical maximum adsorption capacities of ABL@ZnCl2 and ABL@H3PO4 for RhB were 263.19 mg/g and 309.11 mg/g at 25 °C, respectively. Furthermore, the prepared biochar showed good economic applicability, with pay back of USD 972/t (ABL@ZnCl2) and USD 987/t (ABL@H3PO4), respectively. More importantly, even after five cycles, ABL@H3PO4 biochar still showed great RhB removal efficiency, suggesting that it had a good application prospect and provided a new method for the resource utilization of traditional CHM residues. Additionally, pore diffusion, π–π interactions, and hydrogen bonding all play roles in the physical adsorption of RhB on ABL biochar. π–π interactions dominated in the early stage of RhB adsorption on ABL@H3PO4, while pore diffusion played a crucial role in the whole adsorption process on both adsorbents.
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PubMed
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Cai-Yong Zhu,Meng-Ting Shen,Meng-Jie Qi,Ya-Yu Zhao,Zhen Xu,Peng Li,Jie Ru,Wei Gao,Xiu-Mei Zhang
A new 3D Mn-MOF was prepared with the ligand H 2 L (H 2 L = 5-(pyrazin-2-yl) isophthalic acid) by solvothermal method. Then the Mn-MOF was used as a precursor to synthesize CdS/Mn-MOF composites. The degradation efficiency of Rhodamine B (RhB) by CdS/Mn-MOF (theoretical mass ratio of CdS to Mn-MOF is 1:1) is 98.7% in 60 min, which is 19.7 times and 2.3 times that of Mn-MOF and CdS, respectively. The outstanding performance is owed to the loading of CdS, which significantly broadens the photoresponsive range of Mn-MOF and improves the utilization of visible light. Meanwhile, the heterojunction formed between Mn-MOF and CdS can effectively inhibit the recombination of photogenerated electrons and holes. Furthermore, the photocurrent intensity of CdS/Mn-MOF(50) is higher than that of Mn-MOF and CdS. The photocatalytic performance of CdS/Mn-MOF(50) also exhibits excellent stability and reusability . In addition, the enhanced mechanism of photocatalytic activity was investigated systematically.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 13
·6900-6913
·
IF 4.682
Yan Yuanjiu,Wang Ruoheng,Maimaitituersun Mieralimu,Sun Huajun,Liu Xiaofang
BiFeO 3 nanoflakes (BFO NFs) were synthesized via a facile hydrothermal route. The crystal structure, morphology, specific surface area and optical properties of the flakes were characterized by X-Ray Diffraction (XRD), Brunner–Emmet–Teller measurements (BET) and UV–vis Diffuse Reflectance Spectrum (UV–vis DRS). The results showed that the thickness and diameter of BFO NFs are 100–150 nm and 1.0–1.2 μm, respectively. Moreover, the results of UV–vis DRS indicated that BFO NFs exhibits good response to the visible light and the bandgap was calculated to be 2.2 eV according to the Kubelka–Munk theory. The photo-Fenton performance of BFO NFs was obviously enhanced due to the piezoelectric effect for the degradation efficiency of Rhodamine B (Rh B) (10 mg L −1 ) within 60 min and greatly elevated from 72 to 97%. The intermediate active species of ·O 2− and ·OH were detected by radical capture experiments and Electron Spin Resonance (ESR). The possible catalytic mechanism was proposed based on the above experiments results. In previous researches about photo-Fenton reaction, the piezoelectric properties of BFO NFs were rarely mentioned. This study represents a potential approach toward waste water treatment.
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2023
·Vol. 38
·期 5
·1198-1204
·
IF 1.6
Yin Xiaogang,Liu Xinyun,Li Hang,Wu Huimin,Fu Hai,Gong Wei
We investigated the removal of the organic dye rhodamine B in wastewater with recyclable AgBr/polypyrrole (PPy) nano-photocatalysts. With PPy as an active base for electron transfer, and hexadecyltrimethylammonium bromide (CTAB) as both the soft-templating agent and the bromine source, a series of AgBr/PPy nano-photocatalysts containing various proportions of silver were prepared in a convenient one-step synthesis procedure. The synthesized catalysts were characterized by TG analysis to reveal that, in comparison with pure PPy, the interaction between PPy and AgBr led to increased thermal stability. Chemical combination of PPy and AgBr was observed through XRD and XPS analyses. For the morphology study, the AgBr particles were found to be well dispersed in the PPy nanowire network from SEM results. In the photodegradation experiments, up to 92% rhodamine B was degraded by the AgBr/PPy catalysts in the period of 1 hour under 254 nm UV light. The catalysts could maintain 60% catalytic efficiency after 3 cycles in the recyclability test.
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