ACS Applied Nano Materials
·
2024
·
IF 5.3
Junwen Cai,Xin Jiang,Linfeng Zhang,Benoit Couturaud,Wen-Zhuo Tang,Yao-Yan Zhang,Rui-Bo Jin,Yoann de Rancourt de Mimérand,Xiaoyun Jin,Jia Guo
A multifunctional, multiphase-supported photocatalyst was fabricated via the combination of LCD three-dimensional (3D) printing, cold plasma discharge (CPD) technology, and surface chemistry to be used for the degradation of organic pollutants in water and for the generation of hydrogen gas. BiOBr was chosen as the main catalytic phase and was used in association with a phosphor, SrAl2O4:Eu2+,Dy3+ (SAED), and a metal–organic framework, Ni-BDC. Their immobilization was realized thanks to polydopamine (PDA), which is used as a coupling agent. While BiOBr was the most active photocatalytic phase, the phosphor acted as a light-storing component for photodegradation in the dark and overall, as a boost for photoactivity. PDA also boosted the photoactivity, in parallel with its crucial role in the immobilization of the SAED/Ni-MOF/BiOBr catalyst on fractal polymer support. An in situ complexation-assisted precipitation (ISCAP) process was used, allowing the formation of the catalytic phases with nano features. The resulting hybrid photocatalysts were tested through rhodamine B (RhB) dye photodegradation upon visible light irradiation or light/dark alternating conditions to simulate more realistic variable light illumination. We found that, although used in a very small amount, the Ni-MOF had a significant impact on the photoactivity, forming a Z-scheme heterojunction with BiOBr. Finally, H2 evolution testing further established the photocatalytic activity and versatility of the supported catalysts.
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International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 7
·1762-1770
·
IF 7.2
Ma Qin,Shi Lin,Ran Baocheng,Ma Tianfeng,Wang Huan,Lu Yongchang
Up to now, “Turn-on” fluorescence sensor exhibits promising potential toward the detection of heavy metal ions, anions, drugs, organic dyes, DNA, pesticides, and other amino acids due to their simple, quick detection, and high sensitivity and selectivity. Herein, a novel fluorescence method of detecting Cr 3+ in an aqueous solution was described based on the fluorescence resonance energy transfer between rhodamine B (RhB) and gold nanoparticles (AuNPs). The fluorescence of RhB solution could be obviously quenched (“off” state) with the presence of citrate-stabilized AuNPs. However, upon addition of Cr 3+ to AuNPs@RhB system, the fluorescence of AuNPs was recovered owing to the strong interaction between Cr 3+ and the specific groups on the surface of citrate-stabilized AuNPs, which will lead to the aggregation of AuNPs (“on” state). At this point, the color of the reaction solution turned to black. Under optimal conditions, the limit of detection (LOD) for Cr 3+ was 0.95 nM (signal-to-noise ratio, S/N = 3) with a linear range of 0.164 nM to 3.270 µM. Furthermore, the proposed method exhibits excellent performances, such as rapid analysis, high sensitivity, extraordinary selectivity, easy preparation, switch-on fluorescence response, and non-time consuming.
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DYES AND PIGMENTS
·
2015
·
IF 3.966
Jingyue Xu,Ying Li,Luokai Wang,Yanjun Huang,Danlei Liu,Rui Sun,Jialin Luo,Chunyan Sun
A facile aptamer-based sensing strategy was developed for dopamine through the fluorescence resonance energy transfer (FRET) between rhodamine B (RB) and gold nanoparticles (AuNPs). The different affinities of unbound and bound aptamers toward AuNPs were employed to modulate the FRET efficiency for signal transfer. Dopamine-binding aptamers (DBA) could protect AuNPs from salt-induced aggregation, resulting in the fluorescence quenching of RB via FRET. Specific binding of DBA with dopamine formed the structured complex, losing the capability to stabilize AuNPs, thus the salt-induced aggregation of AuNPs led to the decrease of fluorescence quenching ability. Correspondingly, the fluorescence intensity of RB recovered along with the dopamine concentration ranging from 26 to 2.90 × 10 3 nM with the detection limit of 2 nM. This method was successfully applied for dopamine determination in swine feeds and chicken livers. Owing to its high sensitivity, excellent selectivity and convenient procedure, this strategy will provide a promising alternative for dopamine screening.
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POLYHEDRON
·
2025
·
IF 2.6
Tiantian Luo,Junyi Wang,Ruiyan Wang,Jiale Wang,Hao Yan,Bei Zhang,Qi Zhou
In this study, a one-dimensional core–shell photocatalyst composed of hydrogenated TiO 2 (H-TiO 2 ) coated with an amorphous metal–organic framework (MOF) was synthesized via a simple hydrothermal method and applied as an efficient peroxymonosulfate (PMS) activator for Rhodamine B (RhB) degradation. Under simulated sunlight irradiation for 20 min, the optimized H-TiO 2 /BPDC*2 catalyst achieved 99.40 % RhB removal at an initial concentration of 100 mg/L. Its apparent kinetic rate constant was 4.28 and 1.06 times higher than those of H-TiO 2 and H-TiO 2 /BPDC, respectively. The enhanced performance is attributed to the core–shell heterojunction structure, which improves light absorption and charge separation, as evidenced by increased photocurrent, reduced photoluminescence intensity, and shorter time-resolved photoluminescence (TRPL) decay. Furthermore, the catalyst exhibited excellent stability over multiple cycles, demonstrating strong potential for practical wastewater treatment applications. Mechanistic studies revealed that ·O 2 − and 1 O 2 were the dominant reactive species involved in the degradation process.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 35
·17004-17015
·
IF 3.925
Weixing Liu,Wei Duan,Qiang Zhang,Xianjin Gong,Jinlei Tian
Pollution of freshwater caused by organic compounds, especially nitro aromatic compounds and rhodamine B, has aroused deep concern about the sustainable development of the earth in the past decades. Employing 2D Zn-MOF-Ru(cptpy)2 as the original material and dicyandiamide as the nitrogen dopant, a variety of novel N-doped carbon supported Ru nanoparticle materials (Ru-NC) have been successfully synthesized through one-step pyrolysis in a nitrogen atmosphere. Impressively, the introduced dicyandiamide can effectively enhance the catalytic activity of Ru-NC towards 4-NP reduction. The as-obtained Ru-NC-15 catalyst demonstrated an excellent catalytic performance towards nitro aromatic compound and rhodamine B reduction with conversions of more than 99%. Further investigations highlighted that the Ru-NC-15 catalyst possesses favorable catalytic stability and broad substrate applicability. The catalytic activity of the Ru-NC-15 catalyst did not decrease significantly after at least 5 times of continuous use, and it had a high conversion for various nitro aromatic compounds. The mass-normalized rate constants of the Ru-NC-15 catalyst were 2675 min−1 g−1 and 1830 min−1 g−1 towards 4-nitrophenol reduction and rhodamine B reduction, respectively, surpassing many catalysts previously reported in the literature. This work inspired the development of a MOF-derived heterogeneous catalyst for the catalytic reduction of nitro aromatic compounds and rhodamine B contaminants.
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CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2014
·
IF 0.7
Xian-En ZHAO,Tao LÜ,Na WEI,Shu-Yun ZHU,Jin-Mao YOU
Commercial Rhodamine B was first reported as a derivatization reagent labeling hydroxyl compound for mass spectrometry sensitization. In virtue of the strategy of ultrasonic-assisted dispersive liquid-liquid microextraction (UA-DLLME) combined with Rhodamine B derivatization, a new method of ultrahigh performance liquid chromatography triple quadrupole mass spectrometry (UHPLC-MS/MS) was developed for the sensitive determination of Panaxadiol (PD). UA-DLLME and derivatization conditions were investigated. PD in cosmetics and ginseng was extracted by UA-DLLME (150 μL chloroform as extraction solvent, 500 μL ethanol as disperser solvent, 3 min). Using Rhodamine B as precolumn derivatization reagent, the stable derivative of PD was obtained in acetonitrile at 70 °C for 30 min under microwave radiation (800 W) with the catalyst of N, N ′-carbonyldiimidazole (CDI) and 4-dimethylaminopyridine (DMAP). And then the PD derivative was separated and detected within 3 min by multiple reaction monitoring (MRM) mode of UHPLC-MS/MS. The LOD was 4.0 ng L −1 , and the LOQ was 15.0 ng L −1 . This method had perfect linearity, precision and recovery results, and showed obvious advantages such as sensitivity and low matrix effect in comparison with the previously reported methods.
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JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 2
·701-712
·
IF 3.442
Yang Wangyang,Shen Honglie,Min Huihua,Ge Jiawei
In recent years, Ti 3+ self-doped TiO 2 (B-TiO 2 ) exhibits great potential as a photocatalyst. In this work, Ti vapor-assisted annealing is first demonstrated for Ti 3+ doping and improving the visible absorption of TiO 2 . TEM results exhibit the formation of disordered layer, indicating the successful fabricating of B-TiO 2 . The absorption increase in TiO 2 caused by Ti vapor annealing reaches nearly 50% in the visible wavelength range. Benefiting from the absorption increase, the photocatalytic performance of TiO 2 after Ti vapor annealing increases by 60–70%. Surface modification of Ag onto B-TiO 2 is also carried out to further improve its optical property. Ag-modified Ti 3+ self-doped TiO 2 (B-TiO 2 @Ag) exhibits great visible photodegradation behavior to RhB. The RhB degradation rate reaches 97.76% after 60 min of visible light irradiation. Electrochemical performance tests demonstrate that as-prepared TiO 2 @Ag has lower resistance than W-TiO 2 . The results indicate that B-TiO 2 @Ag has great potential in solar photocatalytic degradation of pollutant.
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Frontiers of Environmental Science & Engineering
·
2021
·Vol. 16
·期 3
·1-16
·
IF 4.357
Zhao Shuangyang,Chen Chengxin,Ding Jie,Yang Shanshan,Zang Yani,Ren Nanqi
Fabrication of easily recyclable photocatalyst with excellent photocatalytic activity for degradation of organic pollutants in wastewater is highly desirable for practical application. In this study, a novel ternary magnetic photocatalyst BiVO 4 /Fe 3 O 4 /reduced graphene oxide (BiVO 4 /Fe 3 O 4 /rGO) was synthesized via a facile hydrothermal strategy. The BiVO 4 /Fe 3 O 4 with 0.5 wt% of rGO (BiVO 4 /Fe 3 O 4 /0.5% rGO) exhibited superior activity, degrading greater than 99% Rhodamine B (RhB) after 120 min solar light radiation. The surface morphology and chemical composition of BiVO 4 /Fe 3 O 4 /rGO were studied by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, UV visible diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy, and Raman spectroscopy. The free radicals scavenging experiments demonstrated that hole (h + ) and superoxide radical (O 2 •− ) were the dominant species for RhB degradation over BiVO 4 /Fe 3 O 4 /rGO under solar light. The reusability of this composite catalyst was also investigated after five successive runs under an external magnetic field. The BiVO 4 /Fe 3 O 4 /rGO composite was easily separated, and the recycled catalyst retained high photocatalytic activity. This study demonstrates that catalyst BiVO 4 /Fe 3 O 4 /rGO possessed high dye removal efficiency in water treatment with excellent recyclability from water after use. The current study provides a possibility for more practical and sustainable photocatalytic process.
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RSC Advances
·
2015
·Vol. 5
·期 121
·99664-99668
·
IF 3.84
Zheng Tang,Xiao-Ling Ding,Ying Liu,Zhi-Min Zhao,Bao-Xiang Zhao
We have developed a novel fluorescent probe (RBT) based on rhodamine B and benzothiazole hydrazine units for the detection of hypochlorite in living cells and real water samples with excellent selectivity and sensitivity. In the presence of hypochlorite in a mixture solution of MeCN–PBS (v/v = 3 : 7, pH = 7.4) at room temperature, the fluorescence intensity of RBT increased by 350 fold with the color change from colorless to red. The detection limit of the probe for hypochlorite is 1.06 × 10−9 M. Moreover, RBT was successfully used to image endogenous hypochlorite in living cells and detect hypochlorite in real water samples.
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LANGMUIR
·
2024
·
IF 3.7
Yuanzhen He,Dengjie Zhong,Yunlan Xu,Ran Jiang,Jiayou Zhang,Pengfei Liao
A La-doped Ti/SnO2-Sb2O4 electrode with TiO2-NTs intermediate layer (Ti/TiO2-NTs/SnO2-Sb2O4-La) was created via the electrodeposition technique. The physicochemical and electrochemical properties of the electrode were analyzed through FESEM, XRD, XPS, CV, and LSV electrochemical tests. The results showed that TiO2-NTs were tightly packed on the surface of Ti substrate, thus improving the binding force of the SnO2-Sb2O4-La coating, offering greater specific surface area, more active spots, higher current response, and longer lifespan for the degradation of rhodamine B. The lifespan of the Ti/TiO2-NTs/SnO2-Sb2O4-La electrode reached 200 min (1000 mA cm–2, 1 M H2SO4), while the actual service life was up to 3699 h. Under the conditions of initial pH 3.0, Na2SO4 concentration of 0.1 M, current density of 30 mA cm–2, and initial rhodamine B concentration of 20 mg L–1, the color and TOC removal rate of rhodamine B reached 100% and 86.13% within 15 and 30 min, respectively. Rhodamine B was decomposed into acids, esters, and other molecular compounds under the action of •OH and SO4•– free radicals and electrocatalysis, and finally completely mineralized into CO2 and H2O. It is anticipated that this work will yield a novel research concept for producing DSA electrodes with superior catalytic efficacy and elevated stability.
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PubMed
高影响因子
Journal of Zhejiang University-SCIENCE A
·
2015
·Vol. 16
·期 8
·669-679
·
IF 0.882
Shan Jie,Wang Li,Yu Hao-jie,Tai Yu-lei,Akram Muhammad
Porous polymers are very suitable materials for the adsorption of organic pollutants due to their abundant pores and organic frameworks in aqueous solution. However, their recovery from treated pollutant is difficult, and thus, their application is limited. A facile strategy to synthesize reusable magnetic porous microspheres (MPMS) of Fe 3 O 4 /poly(methylmethacrylate (MMA)- co -divinylbenzene (DVB)) is described in this paper. The magnetic microspheres were synthesized by suspension copolymerization. MMA was used as a monomer, DVB was used as a crosslinker, and the magnetic fluid was added to the organic phase. The morphology of MPMS was observed by scanning electron microscope (SEM) and other properties were tested by superconducting quantum interference device, Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), X-ray powder diffraction (XRD), and nitrogen sorption-desorption techniques. The synthesized MPMS possessed a high specific surface area using toluene as a porogen. It was further found that the ratio of DVB to MMA, the ratio of porogen to monomer, and the type of porogen all affected the specific surface area and the morphology of the microspheres. Furthermore, the microspheres were applied to remove Rhodamine B from its aqueous solution. The results showed that the microspheres possessed good adsorption capacity for Rhodamine B. This result was due to the porous structure, polar groups, and superparamagnetic characteristic of the synthesized microspheres.
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Catalysts
·
2023
·Vol. 13
·期 3
·608
·
IF 3.9
Jingfei Luan,Wenlu Liu,Guangmin Yang,Bowen Niu,Bingbing Ma
A new photocatalyst In2CdO4was prepared by a solid phase sintering synthesis method at high temperature for the first time in this paper. The In2CdO4/Y2SmSbO7heterojunction (IYH) catalyst was prepared by the solvent thermal method for the first time. The Y2SmSbO7compound crystallized in the pyrochlore-type architecture and cubelike crystal system, and the space group of Y2SmSbO7wasFd3mand the crystal cell parameters of Y2SmSbO7was 9.51349 Å. The band gap width of Y2SmSbO7was 2.63 eV. In2CdO4crystallized with a body centered tetragonal lattice structure which was a tetragonal crystal system with a space group ofI41/amd. The band gap width of In2CdO4was 2.70 eV. After 110 minutes of visible light irradiation (VLGI-110min) with IYH as the photocatalyst, the removal rate (RR) of rhodamine B (RhB) concentration was 100% and the total organic carbon (TOC) concentration RR was 99.71%. The power mechanics invariable k toward RhB consistency and visible light irradiation (VLGI) time with IYH as the photocatalyzer reached 0.03073 min−1. The power mechanics invariable k which was involved with TOC reached 0.03621 min−1. After VLGI-110min, the RR of RhB with IYH as the photocatalyzer was 1.094, 1.174 or 1.740 times higher than that with In2CdO4, Y2SmSbO7or N-doping TiO2(N-TO) as the photocatalyzer, respectively. The results showed that the photocatalytic activity of IYH was the highest compared with In2CdO4, Y2SmSbO7, or N-TO. With appending a trapping agent, the oxidative capability for degrading RhB, which ranged from strong to weak among three oxidative radical groups, was as follows: hydroxyl radicals > superoxide anion > holes. This work provided a scientific basis for the research which resulted in prosperous development of efficient heterojunction compound catalysts.Keywords:Y2SmSbO7;In2CdO4/Y2SmSbO7heterojunction photocatalyst;rhodamine B;dye wastewater;visible light irradiation;photocatalytic activity
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