MICROCHEMICAL JOURNAL
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2026
·
IF 5.2
Dengying Long,Min Huang,Mao Jiang,Wei Huang
A dual-mode ratiometric optical strategy is developed for determination of PFOA. • PFOA induces RhB aggregation via hydrophobic interactions, realizing spectral signal regulation. • The sensing strategy does not require any probe preparation process. • Homogeneous intermolecular reactions make the analytical method stable and reliable. Owing to its persistent “forever chemical” nature, perfluorooctanoic acid (PFOA) poses long-term environmental and health risks even under strict regulation, requiring low-cost continuous monitoring. In this work, a dual-mode ratiometric optical strategy was developed for colorimetric and fluorescent detection of PFOA using commercially available rhodamine B without complex synthesis. Under acidic conditions (pH = 1.0), PFOA induces the aggregation of rhodamine B through electrostatic and hydrophobic interactions, leading to the attenuation of monomer signals (UV–Vis absorption peak at 557 nm, fluorescence emission peak at 586 nm) and the enhancement of aggregate signals (UV–vis absorption peak at 593 nm, scattering peak at 557 nm). Accordingly, a dual-mode ratiometric optical sensing platform is constructed for the quantitative detection of PFOA. The limit of detection was 4.6 μM for colorimetry and 3.1 μM for fluorescence. This sensing strategy is not suitable for quantitative analysis of trace PFOA in drinking water due to its sensitivity limitations. However, it may be applicable for monitoring of the discharge of PFOA-containing wastewater from factories and emergency responses to sudden PFOA pollution incidents due to its low cost, stable signal, and ease of on-site operation, offering a practical alternative to complex nanomaterial-based sensors for high-concentration scenarios. Owing to its persistent “forever chemical” nature, perfluorooctanoic acid (PFOA) poses long-term environmental and health risks even under strict regulation, requiring low-cost continuous monitoring. In this work, PFOA induces the aggregation of rhodamine B through hydrophobic interactions under acidic conditions, leading to the attenuation of monomer signals (UV–vis absorption peak at 557 nm, fluorescence emission peak at 586 nm) and the enhancement of aggregate signals (UV–vis absorption peak at 593 nm, scattering peak at 557 nm). Accordingly, a dual-mode ratiometric optical sensing platform is constructed for the quantitative detection of PFOA. Download: Download high-res image (97KB) Download: Download full-size image
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 3
·229
·
IF 3.2
Guo Jing,Zhao Xiaomei,Wang Qi,Wu Rui,Zhu Lexuan,Zhang Xin,Zhang Xinke,Gu Yuke
Morphological engineering is utilized to modify the microstructure and electronic structure of bismuth oxychloride; this led to a remarkable enhancement in photocatalytic performance. In this research, H-BOC nanosheets with concave-pore defects were synthesized via a glycol-mediated solvothermal etching method. Photocatalytic activity was examined using Rhodamine B (RhB, 20 mg·L⁻ 1 ) as the target contaminant under visible-light exposure. H-BOC displayed superior photocatalytic performance within 4 min, achieving a degradation rate of 99% and a reaction rate constant of 0.9643 min –1 , significantly higher than those of T-BOC (53% and 0.1556 min –1 ). The results indicate that the incorporation of concave-pore defects not only improves visible-light absorption and reduces hole migration distance but also enhances charge separation and effectively suppresses the recombination of photogenerated electron–hole pairs. This acceleration in reaction kinetics was further confirmed by trapping experiments and EPR analyses, which reveal that superoxide (•O 2 ⁻) and hydroxyl radicals (•OH) were the dominant reactive species. Furthermore, high-performance liquid chromatography–mass spectrometry (HPLC–MS) and the toxicity estimation software tool (T.E.S.T) were employed to investigate the degradation mechanisms, pathways, and the toxicity of RhB and its intermediates. This study presents a novel approach for designing and developing high-performance photocatalysts.
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Catalysts
·
2025
·Vol. 15
·期 7
·610
·
IF 4
Wei Wang,Jiaqi Liu,Guang Shi,Shiqi Wu,Nan Zhang,Ruixia Yuan
Spherical Cu2O nanoparticles were obtained by reducing copper acetate in N,N-dimethylformamide (DMF) system using glucose as the reducing agent and polyvinylpyrrolidone (PVP) as the surfactant, with which spherical PdCu nanocatalysts were thus synthesized by disproportionation. The catalyst was used for the activation of peroxymonosulfate (PMS) and showed an excellent degradation effect on rhodamine B and methylene blue-contained printing and dyeing wastewater with good stability. Additionally, the surface morphology analysis of the catalyst was carried out by SEM and TEM. The structure was characterized by XRD and FT-IR. The valence state and composition of the catalyst were characterized by XPS. The catalytic performance of the prepared catalysts was investigated with methylene blue and rhodamine B used as target pollutants. The results showed that the catalytic reduction efficiency of PdCu nanocatalyst for the two pollutants could reach 99% at 20 °C, when catalyst concentration was 60 mg/L and PMS concentration was 1.0 g/L and 0.6 g/L, respectively. The degradation efficiency of the catalyst was significantly reduced when Cl−,HCO3−and HA were present in the water. The degradation efficiency was above 90% when the pH was in the range of 5–11. The excellent performance of the PdCu/PMS system in the treatment of RhB-contained wastewater was further confirmed by taking into account of the data of free radical quenching experiment and the results of electron paramagnetic resonance (EPR) experiment. After three cycles, the removal rate of MB and RhB could still be maintained at more than 90%, which proved its excellent recyclability due to its remarkable stability and efficiency.
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Materials
·
2026
·Vol. 19
·期 3
·554
·
IF 3.2
Naveed Karim,Tin Kyawoo,Saeed Ahmed,Weiliang Tian,Huiyu Li,Yongjun Feng
A carbon-modified attapulgite composite (C-AATP@CTAB) was synthesized via the hydrothermal method using citric acid as the carbon source and cetyltrimethylammonium bromide (CTAB) as a surface modifier for efficient rhodamine B (Rh-B) removal. Carbon modification elevated the composite’s specific surface area (212 m2/g) and negative surface charge (−38.21 mV), significantly enhancing dye adsorption capacity to 666.66 mg/g—nearly double that of unmodified ATP variants (360.4–386.8 mg/g). Kinetic studies confirmed pseudo-second-order adsorption kinetics, attributed to hydrogen bonding and van der Waals interactions between Rh-B and the composite. Under photo-Fenton conditions, C-AATP@CTAB achieved 99.8% Rh-B degradation within 20 min, demonstrating superior catalytic performance in heterogeneous Fenton/photo-Fenton systems. This work establishes a low-cost, high-efficiency adsorbent-catalyst hybrid derived from low-grade attapulgite, offering promising avenues for sustainable wastewater treatment.
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LANGMUIR
·
2026
·
IF 4.4
Ziwei Wu,Xinpeng Chen,Jingqi Cao,Yifeng Wang,Yongxuan Xiang,Yixiao Li,Haoyu Wang,Hongmei Cao,Tieling Xing
Photocatalysis and piezocatalysis rely on light energy and mechanical energy (via the piezoelectric effect) as driving forces, respectively. Both have been successfully applied to pollutant degradation and wastewater treatment as advanced oxidation processes. However, in this study, BiFeO3 nanoparticles derived from MIL-101 were solidified in a flexible polyvinylidene fluoride (PVDF) porous structure, forming a dynamic synergistic effect between the piezoelectrically polarized electric field induced by mechanical agitation and the photogenerated carriers. Additionally, the hydrolytic inactivation of the material was inhibited by the chemical barrier effect of PVDF, while the charge separation at the heterojunction interface was directionally driven by the built-in electric field generated by the piezoelectric effect. The BiFeO3/PVDF composite membrane degraded 97.1% of RhB after 60 min of treatment under the synergistic effect of stirring and light. Free radical trapping and electron spin resonance (ESR) analysis confirmed that •O2– and •OH were the key active species (contributing over 60%). Piezoresponse Force Microscopy (PFM) test revealed the mechanism behind the enhancement of the built-in electric field, and density functional theory (DFT) calculations combined with Fukui’s function elucidated that the N4, N5, and C6 sites in the RhB molecule were the preferred targets for free radical attack. Plant growth experiments verified the environmental safety of the system. The BiFeO3/PVDF porous composites with piezoelectric photocatalytic properties proposed in this study provide a promising solution for developing novel materials for efficient catalysis of organic pollutants in water.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2026
·
IF 3.8
Bo Chunmiao,Han Xiaoyu,Tang Xiaofan,Zhao Weilong
Efficient adsorption and sensitive detection of baicalin (BAI) are essential for maximizing its medical value. In this work, a rhodamine B (Rb)-encapsulated metal–organic framework (MOF)@boric acid–modified covalent organic framework (COF) composite material (Rb-MOF@COF-BA) was designed for high-capacity adsorption and high-sensitivity detection of BAI. Specifically, the Zr-based MOF of UiO-66 was prepared with Zr 4+ and 2-aminoterephthalic acid, during which Rb was encapsulated, resulting in strong red fluorescence. The –NH 2 group on the Rb-MOF surface then reacted with 2,5-dimethoxyterephthalaldehyde and coupled with the ligand 1,3,5-tris(4-aminophenyl)benzene to integrate the COF. Subsequently, to enhance the recognition of cis -diol-containing BAI through boron affinity, Rb-MOF@COF was functionalized with (4-ethynylphenyl)boronic acid via aza-Diels–Alder cyclization, obtaining the Rb-MOF@COF-BA composite with blue fluorescence. For BAI, Rb-MOF@COF-BA demonstrated a high adsorption capacity of 114.2 mg g −1 and reached equilibrium within 200 min. Additionally, the Rb-MOF@COF-BA composite displayed dual emissions at 440 and 580 nm, enabling its use as a ratiometric fluorescence sensor for BAI detection, accompanied by a visible blue-to-red spectral transition. The resulting radiometric fluorescence method demonstrated linear ranges of 0.2−3.0 and 3.0−20.0 μmol L −1 with a low detection limit of 0.0173 μmol L −1 for BAI. This analytical method was employed to identify and quantify BAI in Yinhuang oral solution, yielding favorable results that confirmed the potential of this ratiometric detection for practical applications. Graphical
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JOURNAL OF LUMINESCENCE
·
2026
·
IF 3.6
Yuhong Xie,Yiying Wang,Yourong Zhao,Jiali Yang,Yangchun Fan,Hongda Li,Daojiang Gao,Zhanglei Ning
In this study, a dual-emission ratiometric fluorescent materials, rhodamine B-functionalized terbium-based metal-organic frameworks (RhB@Tb-MOFs), were synthesized through an ultrasonic immersion approach. The resulting RhB@Tb-MOFs demonstrate a distinct red-green dual emission, generating an easily distinguishable orange-red luminescence with excellent stability across a wide pH range and aqueous environments. This novel probe demonstrates excellent selectivity along with outstanding anti-interference capability, achieving a detection limit as low as 0.219 μM for S 2− . Moreover, the sensing mechanism was studied in detail, which is attributed to a dynamic quenching mechanism. This study highlights a versatile and generalizable approach for enhancing luminescence-based sensing performance through the encapsulation of fluorescent dyes in Ln-MOFs, presenting significant potential for environmental monitoring and bioanalytical applications.
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Journal of Physical Chemistry C
·
2010
·
IF 4.224
Shunwei Hu,Jia Zhu,Ling Wu,Xuxu Wang,Ping Liu,Yongfan Zhang,Zhaohui Li
Fluorinated In(OH)ySz solid solutions were synthesized via a hydrothermal method. The photocatalytic degradation of rhodamine B (RhB) over the fluorinated In(OH)ySz solid solutions revealed that the process of the de-ethylation of RhB was enhanced, while in the meantime, the rate of the mineralization of RhB was suppressed when In(OH)ySz was fluorinated. To elucidate the opposite effects of fluorination on the two processes of photocatalytic degradation of RhB (de-ethylation and mineralization) over In(OH)ySz, the adsorption of RhB over In(OH)ySz with and without fluorination, the active species involved in the de-ethylation and the mineralization of RhB, were investigated, and the electronic structure of fluorinated In(OH)ySz was studied. The results indicated that the major active species involved in the de-ethylation and the mineralization of RhB are different, that is, the hole direct oxidation leads to the de-ethylation of RhB, while the major active species responsible for the mineralization of RhB is the O2−• radical. The fluorination on In(OH)ySz solid solutions on one hand can enhance the adsorption of RhB on the catalyst surface, leading to a higher rate in the de-ethylation of RhB. On the other hand, fluorination lowers the conduction band of In(OH)ySz, which leads to a lower capability of the photogenerated electrons in the reduction of O2 to give O2−• radicals. Our results clearly show that the fluorine modifications can have ambilateral effects on the photocatalytic performance of semiconductor photocatalysts depending on the specific photocatalytic reactions.
研究领域:
材料科学
·
光催化
·
环境化学
·
半导体催化
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DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Afzal Ali,Adeel Ahmed,Muhammad Usman,Tahir Raza,Muhammad Safdar Ali,Abdulhmeed Al-Nahari,Changbao Liu,Dong Li,Chunhu Li
Unintentional leakage of dyes into the aquatic environment has exacerbated global contamination of water resources in recent years, posing a serious danger to aquatic life and human health. As a result, highly adaptable and effective measures are required to address the worldwide environmental challenge posed by dye usage. Herein, we have adopted hydrothermal technique to synthesize a visible light-induced catalyst based on the Ce 0.2 Co 0.8 Fe 2 O 4 /g-C 3 N 4 composite. The catalysts were characterized in terms of their morphological, structural, and photoluminescence properties. The photocatalytic proficiency of the Ce 0.2 Co 0.8 Fe 2 O 4 /g-C 3 N 4 composite was determined by its ability to degrade rhodamine B (RhB) under visible light irradiation. Ce 0.2 Co 0.8 Fe 2 O 4 /g-C 3 N 4 exhibited superior degradation potential, degrading RhB to 90.27 % in 60 min, compared to CoFe 2 O 4 /g-C 3 N 4 (72.28 %), Ce 0.2 Co 0.8 Fe 2 O 4 (64.45 %) and CoFe 2 O 4 (56.63 %) under predetermined reaction conditions (catalyst dosage = 0.4 g/L, RhB concentration = 20 mg/L, pH = 7, T = 25 ± 1 °C). The substantial increase in photocatalytic potential was attributed mostly to the interfacial migration of photo-induced charge carriers from g-C 3 N 4 to Ce 0.2 Co 0.8 Fe 2 O 4 , which may facilitate electron migration. The as-synthesized catalyst demonstrated outstanding stability in four successive cycles. This study may provide a low-cost approach for fabricating visible-light responsive catalysts for use in environmental remediation applications.
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RSC Advances
·
2022
·Vol. 12
·期 54
·35260-35269
·
IF 4.036
Yuyan Yu,Shumin Ye,Zhiwen Sun,Jinkun You,Weili Li,Yu Song,Hongyan Zhang
Pesticide residue detection is one of the main safety issues in the utilization of medicinal plants. In this work, a highly selective and sensitive aptasensor for acetamiprid determination was designed. The mechanism of the proposed method is based on the fluorescence resonance energy transfer (FRET) between gold nanoparticles (AuNPs) and rhodamine B (RB). Aptamers protect AuNPs from salt-induced aggregation, which causes fluorescence quenching of RB by the AuNPs via surface energy transfer. In the absence of acetamiprid, AuNPs were coated with aptamers on the surface and dispersed in NaCl solution. At this time, the dispersed AuNPs could perfectly quench the fluorescence intensity of RB. In contrast, in the presence of acetamiprid, aptamers specifically combine with acetamiprid to form a complex. With a high salt concentration, AuNPs would be aggregated without aptamer protection, weakening the RB quenching effect. Therefore, the concentration of acetamiprid could be obtained from the change in fluorescence intensity in the system. A fluorescent sensing method was established with a linear range from 0.1 to 3 μg mL−1, and the LOD was 0.0285 μg mL−1. The recoveries of acetamiprid in traditional Chinese medicine (TCM) samples were 96.23–105.75%. This method has great application value for the detection of acetamiprid in a complex sample matrix.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 24
·15703
·
IF 6.208
Yingjie Su,Yangyang Zheng,Meiqin Feng,Siji Chen
Luffa leaf (LL) is an agricultural waste produced by loofah. In this work, LL was used as biomass carbon source for biochars for the first time. After carbonization, activation, and chemical co-precipitation treatments, a magnetic lignocellulose-derived hierarchical porous biochar was obtained. The specific surface area and total pore volume were 2565.4 m2/g and 1.4643 cm3/g, and the surface was rich in carbon and oxygen functional groups. The synthetic dye rhodamine B (RhB) and the antibiotic tetracycline hydrochloride (TH) were selected as organic pollutant models to explore the ability to remove organic pollutants, and the results showed good adsorption performances. The maximum adsorption capacities were 1701.7 mg/g for RhB and 1755.9 mg/g for TH, which were higher than most carbon-based adsorbents. After 10 cycles of use, the removal efficiencies were still maintained at more than 70%, showing good stability. This work not only verified the feasibility of lignocellulose LL as a carbon source to prepare biochar but also prepared a magnetic hierarchical porous adsorbent with good performances that can better treat RhB and TH, which provided a new idea and direction for the efficient removal of organic pollutants in water.Keywords:lignocellulose;magnetic biochar;hierarchical porous;organic pollutants;efficient removal
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 10
·7900-7912
·
IF 2.779
Hu Xuemei,Bao Jianqin,Qiao Junqiang
We report the experimental realization of using copper zinc tin sulfide (Cu 2 ZnSnS 4 ) material for sonocatalytic application for the first time. Hierarchical Cu 2 ZnSnS 4 microspheres were synthesized via a facile one-pot hydrothermal method and characterized systematically. Aggregated Cu 2 ZnSnS 4 nanosheets with an average thickness of ~ 20 nm formed a highly open hierarchical structure. The hierarchical Cu 2 ZnSnS 4 microspheres displayed remarkable sonocatalytic activity both in Rhodamine B degradation and in Cr(VI) reduction. The detailed sonocatalytic experiments revealed that Rhodamine B dye degraded up to 96.4% in 14 min and Cr(VI) reduced up to 98.7% in 10 min and both Rhodamine B degradation and Cr(VI) reduction followed pseudo-first-order kinetics. The reusability tests confirmed that the hierarchical CZTS microspheres have proper stability after 4 consecutive cycles. Moreover, the effects of initial dye concentration, various scavengers, and oxidants on the sonocatalytic RhB degradation process have also been investigated. Furthermore, the plausible mechanism of the sonocatalytic degradation in the presence of hierarchical CZTS microspheres was proposed.
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