ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Hanyue Xue,Min Yu,Kunyi He,Yingnan Liu,Yuanyuan Cao,Yuhang Shui,Jing Li,Muhammad Farooq,Li Wang
Herein, a novel bimodal ratiometric probe for sensitive and selective detection of biothiols (including glutathione (GSH), cysteine (Cys) and homocysteine (Hcys)) was constructed, which was based on the redox reaction between manganese dioxide nanoflakes (MnO 2 NFs) and rhodamine (RhB) and biothiols. When MnO 2 NFs was added into RhB solution, RhB was oxidized to a series of derivatives, accompanying with the colorimetric color changing from purple to light pink and fluorescence changing from red to green. In the presence of GSH, Cys or Hcys, they could reduce MnO 2 NFs to Mn 2+ , thereby preventing the following oxidization of RhB and the corresponding color and fluorescence changes. The absorption intensity ratio and fluorescence intensity ratio showed good linear relationships with the concentrations of biothiols. The colorimetric detection limits for GSH, Cys and Hcys were 0.057 μM, 0.140 μM and 0.087 μM, respectively. And the fluorescence detection limits were 0.177 μM, 0.282 μM and 0.161 μM. More importantly, this probe was successfully applied to monitor the concentration of GSH/Cys/Hcys in human serum samples, with satisfactory recovery. Thus, this MnO 2 NFs-RhB platform can potentially be a candidate for the detection of biothiols.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Lantian Su,Song Wang,Lumei Wang,Zhiyu Yan,Haoyang Yi,Dongwei Zhang,Guoqing Shen,Yun Ma
This paper proposes a fluorescent aptasensor for the detection of carbendazim (CBZ) in aqueous solution using CBZ-specific aptamer as sensing probe, gold nanoparticles (AuNPs) and Rhodamine B (RhoB) as indicator, respectively. In the absence of CBZ, CBZ aptamer could wrap AuNPs and maintained it dispersed in NaCl solution basically. Contrarily, the aptamer could specifically combine with CBZ and form a stable aptamer-CBZ complex, leaving AuNPs exposed to be aggregated by NaCl solution. The dispersed AuNPs could efficiently quench the fluorescence of RhoB, but those aggregated AuNPs have poor capability to impair the fluorescent indicator . Thus, the concentration of CBZ could be detected quantitatively through the distinction of the fluorescence intensity . This convenient fluorescent assay for CBZ had a wide linear range from 2.33 to 800 nM and a 2.33 nM limit of detection (LOD). Furthermore, it had high selectivity over pesticides, antibiotics, metal ions and other disrupting chemicals. As for application, the method could determine CBZ in water samples with recoveries in the range of 96.3–111.2%. This fluorescent aptasensor possessed great potential application for CBZ detection in actual aquatic environment.
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高影响因子
Desalination and Water Treatment
·
2016
·
IF 1.272
Yong-Sheng Lu,Zhan Wang,Yun-Feng Xu,Qiang Liu,Guang-Ren Qian
Iron molybdate (Fe2(MoO4)3) was used as a novel heterogeneous catalyst to activate persulfate () for rhodamine B (RhB) degradation. Results indicated 10 mg/L RhB can be completely removed under the addition of 4 mM and 0.4 g/L Fe2(MoO4)3 within 240 min. Fe2(MoO4)3 can be repeatedly used for six cycles and showed high stability with Fe leaching amounts less than 2.9% in each run. Possible catalytic mechanism was proposed as follows: RhB degradation intermediate products such as hydroxybenzene, quinone compounds and organic compound radicals acted as electron transfer agents to reduce Fe3+ to Fe2+, which reacted with persulfate to form Fe3+ creating the redox cycling of iron, the RhB and those intermediate products are oxidized directly by the molybdenum peroxo complexes which forming probably with and persulfate, and the synergy between Fe3+ and occurring the catalytic effect on the persulfate. Additionally, the major intermediates of RhB were identified according to GC/MS and the possible degradation pathway was proposed.
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2021
·Vol. 47
·期 6
·2331-2338
·
IF 2.914
Gong Jianqiu,He Chun,Zhang Jinlong,Wang Lingzhi
Photocatalytic treatment of water pollutants has attracted extensive attention due to its low energy consumption, low cost and the avoidance of secondary environmental pollution. However, most photocatalysts are in powder form, which makes it difficult to separate from the water system after the reaction. Especially in practical applications, the recycling of the catalyst is an important part. Based on the characteristics that sodium alginate (SA) is easy to form gels under mild conditions, GO-P25@SA gel beads were prepared. The catalyst can be separated from the water system by simple filtration, which greatly saves the recycle cost. Besides, the light response of TiO 2 (P25) and excellent conductivity of graphene oxide (GO) make GO-P25@SA have excellent photocatalytic degradation and cyclic stability for rhodamine B (RhB). In this work, the unique merits of GO and sodium alginate (SA) in developing functionalized photocatalyst were demonstrated, providing a low-cost and easy recycle treatment strategy for rhodamine B degradation.
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高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2022
·Vol. 135
·期 2
·1099-1111
·
IF 1.843
Zhang Hewei,Duan Congcong,Xu Zhen,Yin Jiahang
Herein, the C 60 /Cd 0.5 Zn 0.5 S (C 60 /CZS) photocatalysts with excellent photocatalytic performance were prepared using facile one-pot hydrothermal method. The crystal structure, morphology, photoelectric performance and photocatalytic activity of the samples were characterized by XRD, XPS, UV–Vis and electrochemistry. The catalytic degradation of pollutants under the irradiation of visible light was simulated using Rhodamine B (Rh B). The content of C 60 was changed from 0.5 to 5 wt%, and the optimal value for the photocatalytic activity was determined to be 2 wt%. The apparent degradation rate and degradation efficiency of Rh B were 0.024 min −1 and 97.5% within 140 min, which is 3.4 times that of pure CZS. C 60 /CZS exhibited excellent catalytic performance, and its photocatalytic activity was sustained even after three cycles. Moreover, electrochemical test results demonstrated that the separation and transfer of photocarriers on CZS surface were effectively improved by C 60 , thus enhancing its activity. In this study, we innovatively prepared a novel photocatalyst by combining fullerenes with sulfide solid solution for the first time, which has rarely been studied in the past. The synthetic method is simple, efficient and pollution-free. Subsequently, the catalytic degradation of Rh B experiment confirmed that the catalyst has high catalytic efficiency and stability. This experiment has practical significance not only for the catalytic degradation of Rh B but also for the application of fullerene in photocatalysis.
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WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 85
·期 1
·354-366
·
IF 1.915
Zhang Kaili,Yang Yanli,Xu Miao,Cheng Tiexin,Zhou Guangdong
In this work, Mackinawite (FeS m ) was synthesized by homogeneous precipitation method, and flower-like nanoparticles formed by the aggregation of nanosheets with a preferred orientation along the (001) plane. The heterogeneous Fenton-like degradation performance of FeS m on rhodamine B (RhB) was investigated, results illustrated that RhB degradation was the synergistic effect of adsorption, Fenton, and a heterogeneous Fenton-like reaction. In repeated experiments, the reduction of reactivity was attributed to the oxidation of FeS m into lepidocrocite, whereas lepidocrocite has relatively low hydroxyl radicals (•OH) production reactivity. Thus, it showed excellent degradation effects in long-time degradation of RhB. Photoluminescence technology and free radical capture experiments demonstrated that •OH produced on the surface of catalyst was the main active species to remove RhB. In addition, the Fe species on the surface of FeS m was the main active center for surface-mediated reactions. A total organic carbon test revealed that the degradation was not complete and degradation intermediates were formed. Liquid chromatography-mass spectrometry technology was used to identify the degradation intermediates. On this basis, possible degradation pathways were proposed. Flower-like Mackinawite (FeS m ) nanoparticles were synthesized using an homogeneous precipitation method. FeS m was used as an heterogeneous Fenton-like catalyst to degrade RhB. The reduction of FeS m reuse activity was mainly attributed to the formation of lepidocrocite with lower activity. •OH surface-bounded of FeS m was the main active species for RhB degradation. The possible degradation pathway of RhB was speculated.
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高影响因子
Advanced Sensor and Energy Materials
·
2023
·
IF 0
Zesen Lin,Changchang Dong,Wei Mu,Xiaojun Han
Although photocatalytic technology is applied in water treatment, the challenge still exists due to its low photocatalytic performance. Herein, a photocatalytic reactor coupled with nanobubbles (NBs) is developed to degrade organic pollutants in wastewater. The reactor contains Ti mesh coated with TiO 2 nanotube arrays as a photocatalyst. The introduction of NBs in the reactor increases the dissolved oxygen content to enhance photocatalytic performance. The photocatalytic reactor exhibits outstanding photocatalytic performance, and the degradation ability of Rhodamine B is 95.39% after 2 h of irradiation treatment. The reactor also shows excellent photodegradation performance for other organic pollutants, such as methylene blue (74.23%), tetracycline (68.68%), and oxytetracycline hydrochloride (64.10%). Radical trapping experiments further prove that ·O 2 − , h + and ·OH are the active species for the degradation of RhB in the photocatalytic system. Therefore, this work provides a feasible strategy to design a photocatalytic reactor coupling with nanobubbles technology for the photodegradation of organic pollutants in wastewater.
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ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Hongrui Zhang,Ya-nan Zhang,Like Li,Xuegang Li,Yong Zhao
A method for the determination of cholesterol using rhodamine derivatives as chromogenic substrates was proposed in this study. The oxidation of rhodamine B hydrazide (RBH) by hydrogen peroxide (H2O2) was catalyzed by a peroxide-mimicking enzyme to produce the fluorescent product. The reaction was further combined with the oxidase system to achieve indirect determination of cholesterol concentration, which can be catalyzed by cholesterol oxidase to produce H2O2 as an intermediate product. Optical fiber optofluidic lasers (FOFLs), as a sensitive biochemical detection platform, have the ability to distinguish small differences in the amount of fluorescence products generated by the reaction and were used to achieve sensitive cholesterol detection. Under optimized experimental conditions, the dynamic range of three orders of magnitude was obtained in the determination of H2O2 with a lower limit of detection (LOD) of 1.63 μM, and the assay time was as short as 3.5 min. On this basis, the designed cholesterol sensor obtained a linear range of 2.55–652.67 μM with a lower LOD of 2.55 μM and proved to have good selectivity. The possibility of cholesterol determination in human serum was initially tested. The sensor was also characterized by easy signal collection, wash-free procedure, controlled sample consumption, fast assay, low cost, and simple operation.
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PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 8
·1717
·
IF 4.6
Chenghong Ao,Mai Shan,Yue Zhang,Xiang Li,Ying Kong,Xinwei Dong,Yang Liu,Danping Wu
Biochar has attracted considerable interest owing to its high adsorption capacity; however, the mechanisms through which environmental factors influence the release of adsorbed pollutants remain unclear. This study investigates the adsorption and desorption dynamics of Rhodamine B (RhB) on biochars B2 and B6, which were pyrolyzed at temperatures of 200 °C and 600 °C, respectively, under varying conditions. The results indicated that there was no significant difference in removal efficiency at low RhB concentrations; however, at a concentration of 600 mg/L, biochar B2 had a higher removal efficiency than B6, likely attributable to more adsorption sites. Increased temperatures were found to enhance desorption from both B2 and B6, with B6 exhibiting a faster desorption rate. This phenomenon may be due to the stronger hydrogen bonding between B2 and RhB, which could inhibit desorption. In addition, elevated pH values facilitated desorption, presumably through electrostatic repulsion. Under alkaline conditions, B2 released a greater amount of dissolved organic matter (DOM), leading to increased RhB desorption relative to B6. This study offers a valuable reference for evaluating the environmental risk associated with the application of biochar in real-world settings.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Zhenpeng Zhu,Zishan Sun,Ziying Guo,Xinguo Zhang,Zhan-chao Wu
A core-shell nanocomposite based on carbon dots (CD)/Rhodamine B (RhB) is realized by a facile method. The composite particles show spherical shape with narrow size distribution, non-agglomeration and smooth surface. The as-obtained nanocomposite shows the characteristic dual-emission of thermal-stable CD blue emission and thermal-sensitive RhB red emission at a single excitation wavelength. The fluorescence intensity ratio (FIR) is found to have a good linear relationship ( R 2 > 0.993) with temperature, while the corresponding maximum absolute and relative sensitivity is 2.01% K −1 and 1.39% K −1 in range of 283–373 K. The research provides a simple approach to create novel dual-emitting nanocomposites for temperature sensing application in micron-scale and biological field.
研究领域:
分析化学
·
纳米生物技术
·
生物医学工程
·
分子成像
·
生物传感
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2026
·
IF 3.3
Ju Yun,Wang Fengqin,Wang Yang,Rafique Hummera,Zafar Muhammad Nadeem,Tayyab Muhammad
Semiconductor photocatalysis offers an environmentally sustainable approach for the elimination of organic contaminants from wastewater. However, the photocatalytic performance of Zn 2 In 2 S 5 (ZIS) is often limited by nanosheet aggregation, insufficient exposure of active sites, and the incomplete understanding of reactive oxygen species (ROS) evolution. In this study, marigold-like ZIS microspheres with a 2D-3D hierarchical porous structure were fabricated, and their performance in the photocatalytic degradation of rhodamine B (RhB) was investigated. The structural and physicochemical properties of the obtained ZIS were systematically investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–Vis diffuse reflectance spectroscopy (DRS), and Mott–Schottky analysis. The results demonstrated that this unique structure integrates the advantages of the short charge migration distance of 2D materials and multiple light scattering/adsorption sites of 3D structures. Under AM 1.5 simulated sunlight irradiation, the as-prepared ZIS photocatalyst exhibited excellent photocatalytic activity, with a RhB degradation efficiency of up to 99.7% within 60 min and an apparent reaction rate constant (k) of 0.09 min⁻ 1 , which compares favorably with most previously reported ZIS-based photocatalysts. Through trapping experiments, electron spin resonance (ESR) spectroscopy and qualitative detection of hydrogen peroxide (H 2 O 2 ), the photocatalytic reaction mechanism of ZIS was elucidated: superoxide radical (·O 2 − ) is the primary active species, followed by photogenerated hole (h⁺), whereas hydroxyl radical (·OH) make the least contribution. More importantly, a cascade mechanism of “ O 2 − – H 2 O 2 –·OH” was proposed in this work, which not only resolves the inherent contradiction of insufficient valence band position of ZIS but also demonstrates the potential of hierarchical zinc indium sulfide photocatalysts for efficient environmental remediation applications.
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高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 13
·e73156
·
IF 2.3
Jia Chen,Dongxue Ren,Xiapin Zhu,Qing Li,Haiyan Li,Huanhuan He,Yonghua Sun
The development of efficient and green activators for hydrogen peroxide (H 2 O 2 ) is crucial for advanced oxidation processes. This study presents a novel double alkaline earth metal silicate, (BaSr) 2 SiO 4 (BSSO), as a highly effective and environmentally friendly activator for degrading Rhodamine B (RhB). The optimal BSSO material, synthesized with a Ba/Sr molar ratio of 1:2 and calcined at 900°C, achieved a remarkable 88% degradation efficiency of RhB within 120 min. A significant advantage of the BSSO/H 2 O 2 system is its inherent strong alkalinity, which is ideally suited for treating alkaline wastewater without requiring external pH adjustment. More importantly, BSSO functioned as an activator, enhancing the degradation rate by 4.7 times compared to a system with NaOH-adjusted pH alone. Mechanistic investigations confirmed that the degradation proceeds primarily through radical pathways, with •O 2 − , HO•, and HO 2 • identified as the dominant reactive oxygen species, and the ecotoxicity was evaluated through Ecological Structure Activity Relationships (ECOSAR) program. Furthermore, BSSO demonstrated good stability, maintaining over 70% degradation efficiency after four consecutive cycles and outperforming other silicate-based activators. Given its high efficiency, self-regulating alkalinity, and absence of toxic ions, BSSO represents a promising and sustainable activator for practical organic wastewater treatment. Graphical A nontoxic (BaSr) 2 SiO 4 catalyst is developed, leveraging its inherent alkalinity to efficiently activate H 2 O 2 for degrading dyes in alkaline wastewater, achieving 88% removal without pH adjustment.
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