CHEMOSPHERE
·
2022
·
IF 8.943
Congjie Liang,Jian Ma,Yixi Cao,Taisong Zhang,Chanyu Yang,Yingfeng Wu,Huaming Li,Hui Xu,Yingjie Hua,Chongtai Wang
Adsorption and its influence are often neglected during photocatalytic degradation of organic pollutants . To call attention to these issues, a novel bismuth oxybromide (BiOBr) microsphere with hierarchical flower-like structure was fabricated through a facile hydrothermal process using polyvinyl pyrrolidone (PVP) as additive in this work, and then the adsorption of the BiOBr microspheres to RhB and its influence on the photocatalytic degradation of RhB were investigated in detail. Experimental results show that the BiOBr microspheres have a very strong adsorption capacity to RhB. The adsorption behavior follows the Langmuir model and the quasi second order kinetic equation . Tests of the photocatalytic degradation of RhB under visible irradiation verify that the adsorption of the BiOBr microspheres to RhB greatly boosts the degradation of RhB due to the “enriching effect”, and a complete degradation of 20 mg L −1 RhB only requires 37 min.
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Zhichao Miao,Jiyao Tao,Shaoyuan Li,Jian Wu,Zhao Ding,Xiuhua Chen,Wenhui Ma,Hua-Jun Fan
The popcorn-shaped ZnFe 2 O 4 (ZFO) nanospheres has been produced by one-pot synthesis method. CdS nanoparticles (NPs) were subsequently loaded onto the surface of porous ZnFe 2 O 4 through the successive ion layer adsorption (SILAR) process. The microstructure, composition , and degradation ability of ZFO/CdS NPs composites have been examined in-depth. Under the four SILAR cycles, the resulting ZFO/CdS NPs (FS4) composite displayed the maximum degradation efficiency of 93.2% for rhodamine B (RhB) in 40 min, and which maintained high photocatalytic activity and a stable structure after five reuse. The heterojunction between CdS and ZFO can dramatically improves the separation efficiency of photo-generated electron-hole pairs, thus boosts catalytic activity. Meanwhile, the radical scavenging investigations have demonstrated that the superoxide radicals as the principal reactive group participate in the photocatalytic reactions. The proposed ZFO/CdS NPs composites shows high photocatalytic ability and convenient magnetic recycling. This work not only provide a practical green synthesis path, but also offers new insight onto the formation of high-efficiency heterojunction photocatalysts .
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DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Yixiong Pang,Yang Ruan,Yong Feng,Zenghui Diao,Kaimin Shih,Li'an Hou,Diyun Chen,Lingjun Kong
In this work, ultrasound (US) irradiation assisted powder zero valent iron (ZVI) corrosion was conducted for peroxymonosulfate (PMS) activation. PMS activation activity was evaluated by Rhodamine-B (Rh B) degradation efficiency. The other US/PMS, ZVI/PMS, Fe 2+ /PMS and US/PMS/Fe 2+ systems were performed to investigate the synergistic effects of US and ZVI on PMS activation activity. US/PMS/ZVI system performed the highest activity of Rh B degradation. 99.76% of Rh B was removed within 12 min under the optimum condition (pH = 4.5, ZVI dosage = 1 g/L, PMS = 1 mM, US power = 50 W). A comparison of US/PMS/ZVI system with PMS/ZVI and homogeneous US/PMS/Fe 2+ systems for Rh B degradation was conducted, indicating that ultrasound irradiation contributed to acceleration of ZVI corrosion and removal of passive films. Besides, the electrons transformation from Fe 0 to PMS made main contribution to the generation of sulfate radical , which resulted in the ability of degradation of Rh B. ZVI could be reused for five cycles with efficient activity of PMS activation. Exhaustion of ZVI led to the decrease in PMS activation at the sixth recycle. Thus, this work presents important information on understanding reuse of iron fillings for PMS/PS activation in practical application of pollution remediation.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Shuyu Wang,Bin Yang,Yuping Liu
Using Sn 2+ instead of Sn 4+ as Sn source, H 2 O 2 as oxidizer, and l -cysteine as sulphur source and structure-directing agent, hierarchical SnS 2 nanostructure built with the thickness of 10 nm nanosheets was successfully synthesized by a green hydrothermal process. The morphology and structure of the products were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) with energy-dispersive X-ray spectrometer (EDS) and Elemental mapping, Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The as-prepared nanostructured SnS 2 nanomaterials were tested for adsorption of Rhodamine B (RhB) from aqueous solution. The effects of contact time, adsorbent dosage and initial concentration were investigated in detail. The adsorption kinetic data were well fitted to the pseudo-second-order model and the equilibrium adsorption data were well described by the Langmuir isotherm model, with a maximum capacity of 200.0 mg g −1 . This study provides a novel approach to obtain metal sulfide nanostructures using low-valence metal salts.
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DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2019
·
IF 3.25
Cuiling Ai,Sikai Yang,Fan Zhang,Xiangwen Shao,Junge Xu
Ag/AgCl-GO composite was fabricated by deposition–precipitation method and photoplasmic reduction method at room temperature. The resulting products were characterized by XRD, XPS, SEM, TEM, Zeta potential and UV–Vis DRS. The results indicated that the samples were composed of Ag, AgCl and graphene oxide (GO). During the photoreduction, the crystallinity of Ag 0 particles gradually increased with prolonging the time of UV irradiation, then remained stable after 90 min. The addition of GO had little effect on the crystal structure of Ag/AgCl, however, this reduced the particle size and enhances the dispersibility of the composite. After 100 min of visible light irradiation, the degradation efficiency of rhodamine B (RhB) reached 98.43%. Therefore, the Ag/AgCl-GO photocatalyst exhibited significant photocatalytic activity during the degradation of RhB under visible light.
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DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2014
·Vol. 89
·期 2
·291-296
·
IF 0.488
Sun C. H.,Wang M. L.,Feng Q.,Liu W.,Xu C. X.
The SERS signals of Rhodamine B (RhB) adsorbed on Ag, ZnO, and Ag-capped ZnO (ZnO/Ag) substrates were studied. Comparative analysis indicated no significant difference in the positions of the peaks, but the intensities of SERS signals are different. However, abnormal Raman spectrum of RhB (10 −4 M) adsorbed on ZnO was observed, which was different from the normal Raman spectrum distinctly. By assignment of the vibrational bands of abnormal Raman spectrum, it is suggested that the nitrogen atom is primarily adsorbed on the ZnO substrate instead of the xanthene ring.
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DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Xiaoxiao Gao,Yan Zhang,Zheng Fu,Jiashuo Tian,Liuping Zhang,Wanqiong Li,Shuailiang Li,Fengling Cui
In this paper, rhodamine B (RhB) was modified on carbon dots (CDs) by hydrothermal method , and a double emission ratiometric fluorescent probe (RhB-CDs) with red luminescence was successfully constructed. The synthesized RhB-CDs had exceptional optical properties and exhibit two emission peaks (480 nm and 590 nm) at 350 nm excitation. It could be used for ratiometric detection of MnO 4 − and Cr 2 O 7 2− , and the fluorescent color would also change (red to orange) when the pH changed from 6 to 7, showing great application potential in the field of sensing and detection. Moreover, the ratio of the emission peak fluorescence intensity had a linear relationship with the water content of alcohols, which was successfully used to detect actual water samples. In addition, the synthesized RhB-CDs had low cytotoxicity and were successfully used for multicolor cell imaging .
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 16
·24220-24234
·
IF 0
Song Jie,Li Yidan,Chen Lijun,Zhao Dong,Yu Shuang,Huang Liangxian
Two natural adsorbent materials, potassium humate (KHA) and montmorillonite (MMT), were successfully prepared by embedding them in sodium alginate (SA) gel spheres through physical cross-linking with CaCl 2 . And CaCO 3 was used as a porogenic agent to prepare the porous composites, KHA/SA/MMT. The materials were characterized by using XRD, TGA, SEM, and N 2 adsorption/desorption equipment. The results showed that MMT and KHA were successfully embedded in the SA gel; the introduction of MMT increased the thermal stability of the composites and the embedding of MMT, and the porogenic effect of CaCO 3 increased the specific surface area of the composites substantially, which provided favorable conditions for adsorption and treatment of pollutants. In addition, a one-way exploratory experiment yielded a higher removal rate of Rhodamine B (RhB) at D = 0.6 g/L, pH = 5, C 0 = 100 mg/L, and t = 360 min. The adsorption kinetics and adsorption isotherm conformed to the secondary kinetic model and Langmuir model, respectively, and the maximum adsorption of RhB by KHA/SA/MMT could reach up to 884.96 mg/g at 303 K. The adsorption mechanism for RhB was shown by FT-IR and XPS analyses to be possibly bound by non-covalent bonding forces. After seven consecutive adsorption–desorption cycles, the adsorption of RhB by KHA/SA/MMT still reached 80.75%. Therefore, the prepared gel spheres have the advantages of easy regeneration and efficient reuse and great potential for application in purifying RhB from wastewater.
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DOI
JOURNAL OF SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Xiaolong Zhang,Hui Zheng,Shilei Jin,Yuhong Jiang,Yaxin Wang,Yang Liu
Multifunctional nanocomposites with well-defined structures and optimized electromagnetic properties are highly desirable in surface-enhanced Raman scattering (SERS) and catalytic reduction reactions. We report a novel multifunctional Fe 3 Pt–Ag nanoparticle with efficient SERS performance and excellent catalytic activity. Fe 3 Pt–Ag shows an obviously enhanced SERS effect, which is evaluated by enhanced Raman signal of Rhodamine B (RhB). Efficient SERS performance of Fe 3 Pt–Ag is attributed to the optical property of local surface plasmon resonance of Ag nanoparticles (NPs). Importantly, spontaneous catalytic reduction reactions of RhB illustrate that Fe 3 Pt–Ag possesses good catalytic performance. In combination with the theories of pseudo-first-order kinetics, catalytic reduction reactions are analysed in detail, and experimental data are in line with theoretical results. Fe 3 Pt–Ag can be easily recycled at least six times via an external magnetic field , elaborating that our developed Fe 3 Pt–Ag can be applied to protect environment as a novel composite material.
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DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2026
·
IF 3.4
Zhao Rui,Liu Ying,Han Shen,Qin Xiaochen,Osseni Sawab Deen,An Ruixuan,Yao Zhiyi
As one of the most toxic and prevalent mycotoxins, aflatoxin B 1 (AFB 1 ) poses a persistent threat to food safety and public health due to its widespread contamination of cereal commodities and its well-documented carcinogenic, genotoxic, and hepatotoxic effects. Although fluorescence sensing provides a rapid approach to AFB 1 screening, most existing fluorescence strategies rely on antibodies or aptamers, which are costly, laborious, and susceptible to environmental degradation; moreover, single-emission readouts remain vulnerable to variations in probe concentration, excitation conditions, and sample background. Herein, we developed a simple two-fluorophore, antibody- and aptamer-free ratiometric fluorescence system that pairs the AFB 1 -responsive perylene derivative PTHA with Rhodamine B (RhB) as a reference fluorophore to afford a single-excitation, dual-emission readout. The system produced a concentration-dependent ratiometric signal over the linear range of 1–20 µg mL −1 , with an estimated statistical detection limit of 0.0165 µg mL −1 . It produced a substantially greater response to AFB 1 than to the tested mycotoxins and other potential interferents, indicating preliminary discrimination among the substances examined. The absorption changes and nearly unchanged fluorescence lifetime were consistent with predominantly static or static-like fluorescence attenuation involving ground-state association and possible redistribution of PTHA toward weakly emissive aggregated states. The performance of the method was evaluated in AFB 1 -spiked rice, maize, and millet extracts, yielding recoveries of 91.5–109.0% and relative standard deviations of 1.2–3.6%. These results support the proof-of-concept use of the PTHA/RhB system for ratiometric determination of relatively high AFB 1 levels in pretreated cereal extracts.
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DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2026
·
IF 3.4
Xiaoli Wu,Jiajia Du,Dandan Zhang,Jiayi Chen,Xi Yang,Xiaonan Liu
Iron(III) and copper(II) ions are ubiquitous in the environment, posing potential risks to the environment and human health, which urgently demands rapid detection methods. In this study, a ratiometric fluorescent probe was developed by integrating biomass-based carbon dots with rhodamine B (RhB) for the rapid and accurate detection of Fe³⁺ and Cu²⁺. Under normal conditions, the strong coordination ability of Fe³⁺ and Cu²⁺ enables them to rapidly occupy the active sites on the surface of carbon dots (CDs), resulting in rapid fluorescence changes. RhB provides a stable reference signal and achieves self-calibrated dual-emission output, thereby reducing matrix and environmental interferences. To address the coexistence of Fe³⁺ and Cu²⁺ in practical detection, ethylenediaminetetraacetic acid (EDTA) was introduced as a selective masking agent, which preferentially forms a stable complex with Fe³⁺. This reduces the signal interference of Fe³⁺ in low-concentration systems and realizes highly selective detection of Cu²⁺. In the detection of Cu²⁺ in actual water samples, the probe exhibits high sensitivity (4.91 µM) and favorable accuracy with recoveries ranging from 97.3% to 99.5%, demonstrating strong reliability in complex samples. This study not only provides a green and sensitive method for Cu²⁺ detection, but also presents an effective strategy for resolving specific detection issues in complex matrices using classical masking agents.
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DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Shehbaz Ahmed,Rui Cao,Liping Feng,Yuan Tian,Xiao Yu,Jie Su
Semiconductor photocatalysis has been known as a promising strategy for removing organic dye pollutants, while pristine BiOBr still suffers from rapid charge recombination and limited visible-light responses. In the present study, cerium-doped BiOBr (Ce-BiOBr) nanosheets were synthesized via a solvothermal technique and evaluated for the effective degradation of Rhodamine B (RhB) under visible-light irradiation. Density functional theory (DFT) analysis, coupled with photoelectrochemical evaluation, confirms that within the band structures of BiOBr, Ce doping introduces Ce 4f intermediate energy levels. The intermediate energy level facilitates the effective suppression of carrier recombination and the rapid migration of photogenerated electrons. Consequently, the optimized Ce-BiOBr photocatalyst achieves a remarkable degradation rate constant of 0.03416 min -1 , which is nearly four times higher than that of pristine BiOBr (0.00874 min -1 ). Additionally, the active species trapping experiment reveals that in degradation processes, the superoxide radical (•O 2 - ) acts as the dominant reactive species. These results highlight the critical role of Ce-BiOBr in tailoring the electronic structure and charge-transfer behavior of BiOBr, providing an effective strategy for designing high-performance visible-light photocatalysts for environmental remediation. Download: Download high-res image (229KB) Download: Download full-size image
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