MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Qingmei Qiao,Yunlan Xu,Dengjie Zhong,Xihong Ke,Yuqin Yang,Hanlu Zeng
In order to enhance the carrier separation efficiency and redox ability of photoanode, a dual Z-scheme heterojunction Ce-UiO-66/g-C 3 N 4 /Bi 2 WO 6 /Ti photoanode was prepared and assembled with Cu cathode to form PFC. The characterization results show that Ce-UiO-66/g-C 3 N 4 /Bi 2 WO 6 uniformly distributed on the Ti substrate, with average crystallite size of 9.04 nm and average particle size of 33.05 nm, which provides sufficient reactive active sites for RhB degradation. The RhB degradation rate, P max , J sc , V oc and FF of the PFC were 90.9 % (90 min), 7.53 µW cm -2 , 0.152 mA cm -2 , 0.37 V and 0.134, respectively. The turnover frequency (TOF) for RhB degradation by the PFC reached 0.98 h -1 . Fermi energy level analysis shows that a double-Z heterojunction is formed between Bi 2 WO 6 and g-C 3 N 4 , and between Bi 2 WO 6 and Ce-UiO-66, which not only effectively separates photogenerated e - - h + , but also retains the high redox ability of the composite. Moreover, with the introduction of Ce-UiO-66, the composite photoanode has larger specific surface area and wider visible light absorption range. In addition, because of the built-in electric field, the photogenerated electrons can migrate to the surface of composite particles more easily and react with dissolved oxygen to generate more •O 2 - to participate in the degradation of RhB. This work provides a valuable reference for developing PFC photoanode with high efficiency and visible light response.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yanjia Guo,Juan Lu,Wenzhuo Wang,Hanyue Jiang,Guangping Ma,Pengfei Han,Li Tian,Tengying Ma
In this study, we developed novel copper-doped biomass carbon quantum dots (Cu-CQDs) utilizing cantaloupe peel and copper nitrate as precursors. Compared to undoped biomass carbon quantum dots (CQDs), the Cu-CQDs demonstrated a stronger electrochemiluminescent (ECL) signal when reacting with K 2 S 2 O 8 . By employing the synthesized Cu-CQDs as a luminescent reagent, we collaborated with the polymer donor PM6 to construct an innovative solid-state ECL sensor for the trace detection of Rhodamine B (RhB). The solid-state ECL sensor was developed using a layer-by-layer modification approach, sequentially modifying the electrode surface with the polymer donor PM6, Cu-CQDs, and chitosan (CS). The layered structure of the polymer donor PM6 serves as a carrier for Cu-CQDs, enhancing their effective concentration on the electrode surface. Additionally, its electron-donating properties facilitate electron transfer within the sensor system. Chitosan (CS), characterized by its viscosity, was modified as the outermost layer, further enhancing the stability and ECL intensity of the sensor. RhB exhibited a significant quenching effect on the ECL signal of the constructed sensor, with the quenching value being proportional to the logarithm of RhB concentration in the range of 5.0 × 10 −8 to 5.0 × 10 −13 M. This sensor was successfully applied to the detection of RhB in chili samples, providing an effective platform for food safety monitoring.
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高影响因子
Frontiers in Microbiology
·
2026
·
IF 5.8
Xiangting Li,Meng Ren,Shuhang Deng,Lingli Lei,Ping Ma,Yingshuai Liu
IntroductionPotato virus S (PVS) causes severe damage to Solanaceae plants, especially potato, due to its widespread infection and the reliance on laboratory-based reverse transcription-polymerase chain reaction (RT-PCR) testing. This work intends to develop a rapid, highly sensitive, and dual-signal platform for on-site PVS detection.MethodsWe developed a highly sensitive lateral-flow immunoassay (LFIA) capable of colorimetric and fluorescent dual-mode detection based on a novel core-shell structured probe, which consists of a porous metal-organic framework UiO-66 encapsulating rhodamine B inside and loading gold nanoparticles (AuNPs) outside with 3-aminopropyltriethoxysilane (APTES) as a spacer and glue, denoted as UR@APTES@AuNPs.ResultsThe developed LFIA enabled dual-mode PVS detection within 15 min with negligible cross-interference from Potato virus X and Potato virus Y. The platform achieved a limit of detection (LOD) of 31.2 pg/mL for the colorimetric mode and 7.6 pg/mL for the fluorescent mode, over one order of magnitude lower than the conventional AuNPs-based LFIA (LOD = 462.4 pg/mL). Furthermore, PVS in field-collected potato leaves was successfully detected by the new LFIA platform.DiscussionThe dual-mode LFIA demonstrated a rapid, cost-effective, and highly sensitive on-site screening of PVS in field samples, highlighting its great potential in practical application. This platform can be easily adapted to the detection of other pathogenic viruses by using the corresponding specific antibodies.
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OPTICAL MATERIALS
·
2022
·
IF 3.754
Yundong Zeng,Yunlan Xu,Dengjie Zhong,Jiaxin Mou,Haoyang Yao,Nianbing Zhong
The development of photocatalytic fuel cell (PFC) with visible-light response is usually limited by the low efficiency of electron-hole separation in photoanode . In this work, 20%-PTh/Ag 3 PO 4 /BiOI/Ti photoanode was prepared for the first time to construct a PFC with Cu 2 O/Cu cathode to degrade rhodamine B. With visible-light stimulation, the rhodamine B degradation rate, maximum photocurrent density and maximum power density of the PFC were respectively 96.33% (2 h), 0.39 mA cm −2 and 82.20 μW cm −2 . The main active species in the PFC were proved by quenching experiments to be h + , ∙OH and ∙O − 2 . The satisfactory performance of the PFC was due to that a double Z-scheme heterojunction was formed in the photocatalyst of 20%-PTh/Ag 3 PO 4 /BiOI/Ti photoanode, which made the photogenerated electrons of Ag 3 PO 4 and BiOI directly combine with the photogenerated holes of PTh , so that the photogenerated holes of Ag 3 PO 4 and BiOI and the photogenerated electrons of PTh directly or indirectly participated in the degradation reaction of RhB. In this way, the separation efficiency of electron-hole pairs in the photoanode was improved, and the performance of the PFC was significantly enhanced.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Yu Liang,Lihua Li,Chunmeng Yang,Lu Ma,Weihui Mao,Hongmei Yu
The rational design and development of a highly efficient and sustainable heterogeneous catalyst has become a limiting factor for the practical application of persulfate-based advanced oxidation processes in organic dye degradation. Herein, a nitrogen-doped porous carbon-coated CoFe 2 O 4 core – shell composite (CoFe 2 O 4 @NPC) was synthesized by in-situ growth of cobalt/iron bimetallic zeolitic imidazolate framework-9 (Co/Fe-ZIF-9) on graphene oxide (GO) nanosheets followed by one-step calcination of the bimetallic ZIF-GO composite in nitrogen. The textural, chemical, and magnetic properties of the composites were comprehensively characterized using various analytical techniques. The catalytic performances of the as-prepared CoFe 2 O 4 @NPC in activating PMS to decompose Rhodamine B (RhB) were then systematically evaluated. The composite calcined at 600 °C exhibited the highest catalytic activity. The maximum RhB degradation efficiency of 99.05% and pseudo-second-order kinetic constant of 0.0766 L/(mg·min) were achieved after 20 min at 25 °C. Moreover, CoFe 2 O 4 @NPC displayed excellent recyclability and stability with negligible leaching of Co and Fe ions into the solution. Subsequently, electron spin resonance , reactive oxygen species quenching, and X-ray photoelectron spectroscopy were conducted to clarify the PMS activation mechanisms. Results suggested that SO 4 •− and •OH were generated during PMS activation and that SO 4 •− was the predominant radical involved in RhB degradation. In addition, Co(II), Fe(III), and structured nitrogen, especially pyridinic and graphitic N groups, participated in the PMS activation. Some insights into possible mechanisms of RhB degradation were also attained from spectral analyses. All these results suggested that CoFe 2 O 4 @NPC had excellent potential as a PMS activator for application in dye-contaminated wastewater treatment.
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JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 7
·4564-4574
·
IF 2.1
Lu Jingmin,Qian Haoran,Ge Lei,Zhang Zhongcheng,Hao Hequn,Xu Zezhong,Yu Tingting,Li Minghua,Tian Changan,Xie Jinsong
In this paper, Ag/TiO 2 composites with different Ag doping ratios (0.5%, 1%, 2% and 3%) were prepared by a one-pot solvothermal method without post calcination. Glycine promoted the formation of rod-like TiO 2 growing along the (101) plane and introduced Ag nanoparticles (NPS) onto the surface of TiO 2 . A series of characterization tests, including x-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), x-ray photoelectron spectroscopy (XPS), UV–Vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy, nitrogen adsorption and desorption measurement, and electrochemical measurements were employed. The measurements confirmed that the formed Ag/TiO 2 nanorod composite with 1% Ag loading ratio (Ag/TiO 2 -1), consisting of length up to 22 nm and Ag nanoparticles (NPS) with a diameter of about 5.5 nm, had an appropriate energy band gap of 2.95 eV and a large specific surface area of 158.3 m 2 /g, which shows that the Ag/TiO 2 -1 has abundant photocatalytic active sites to increase its visible-light absorption ability. The Ag/TiO 2 -1 sample has the highest photocatalytic efficiency, with up to 95% and 98% degradation for tetracycline (TC) and Rhodamine B (RhB), respectively, in 25 min under simulated solar light. After the sixth cycle experiment, Ag/TiO 2 -1 still maintained 94% and 95% degradation of TC and RhB, respectively. The trapping active species experiment confirmed that the hole (h + ) and superoxide radical \(\left( { \cdot {\text{O}}_{2}^{ - } } \right)\) are the main active species. This work has practical significance for the simultaneous study of the photocatalysis of Ag/TiO 2 composites for dyes (RhB) and antibiotics (TC).
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
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IF 7.312
Jiayu Zhang,Mingwei Yan,Guangchao Sun,Kaiqi Liu
A novel and cost-effective TiO 2 nanofiber membrane on porous fly ash ceramic as support (TNM-PFACS), using fly ash, graphite, and industrial rutile as raw materials, was successfully obtained based on the semi-dry press and hydrothermal process. The phase composition and micro-morphology of TNM-PFACS were characterized and analyzed by XRD, EDS, SEM, and TEM. Furthermore, it was discussed about simultaneous removal of heavy metal ions (Cu(II), Cd(II), and Cr(VI)) and rhodamine B, involving the adsorption and photodegradation process. The results indicated that the removal rate (90.15%) and adsorption capacity (9.56 mg/g) of Cu(II) was maintained, while the adsorption of Cd (II) was inhibited. In the photodegradation process, rhodamine B promoted the reduction of highly toxic Cr(VI) to Cr(III), and the highest removal rate of Cr(VI) reached 97.09%. TNM-PFACS presented simultaneous removal of heavy metal ions and rhodamine B through synergism and antagonism in the adsorption and photodegradation process, which can be applied as a simpler and cost-effective material in industrial wastewater treatment.
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2020
·Vol. 35
·期 4
·719-725
·
IF 0.64
Zhang Chenxu,Wu Xiangfeng,Jia Yunning,Chang Tianlong,Liu Zhifeng,Fu Yunxuan,Liu Xutao,Wang Hui,Shi Yimai,Zuo Yuqian
The SnO 2 quantum dots (SnO 2 QDs)/ZnS nanosheets (ZnSNs) heterojunction was fabricated via an in-situ synthetic method at room temperature. Rhodamine B, potassium dichromate, and tetracycline were used to discuss the photocatalytic activities of the as-prepared samples under the visible light illumination. The photocatalytic mechanism of the as-prepared samples was also proposed. The experimental results indicate that the degradation efficiency of the as-prepared SnO 2 QDs/ZnSNs heterojunction first increases and then decreases with increasing the usage of ZnSNs. When the mass ratio of SnO 2 QDs to ZnSNs is 1: 2 in 180 min, the asprepared samples have the highest degradation efficiency of 89.1% for rhodamine B, 97.7% for potassium dichromate, and 83.8% for tetracycline, which are much higher than 51.7%, 26.8%, and 0.9% of pure SnO 2 QDs as well as 37.9%, 87.1%, and 19.1% of pure ZnSNs, respectively. After it is repeatedly degraded for 3 times, it possesses the degradation efficiency of 62.5% for rhodamine B, which increases by 200.5% in comparison with 20.8% of the pure SnO 2 QDs. Moreover, the enhanced photocatalytic performances of the as-prepared hybrids are attributed to the formation of heterojunction between the SnO 2 QDs and ZnSNs. In addition, hydroxyl radicals and superoxide anion radicals play major roles during the photocatalytic degradation process, while holes play a minor role.
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MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 11
·1-9
·
IF 5.479
Zhen Deshuai,Jiang Ning,Geng Hongchao,Qiao Yan,Liu Yu,Zhu Xingqi,Gao Chan,Grimes Craig A.,Cai Qingyun
Cobalt-doped nanoporous carbon (Co-NPC) with dodecahedral shape was pyrolytically synthesized and applied as a sorbent and matrix for the enrichment and analysis of small molecules by surface-assisted laser desorption/ionization time-of-flight mass spectrometry (SALDI-TOF MS). Extremely low detection limits were accomplished for cetyltrimethylammonium bromide (1 fg·mL −1 ), and Rhodamine B (1 fg·mL −1 ) in water, and Malachite Green and its metabolite in fish blood and fish extracts (pg·mL −1 concentrations).
Schematic representation of cobalt-doped nanoporous carbons (Co-NPCs) applied as SALDI matrix for analysis of toxic contaminants in fish and receipt papers. The Co-NPCs have a high desorption/ionization efficiency and low limit of detection.
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PubMed
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Muhammad Khalid Hussain,N.R. Khalid,Muhammad Tanveer,Amir Abbas,Furqan Ali,Warda Hassan,Martha Rianna,Sultana Rahman,Muhammad Hamza,Muhammad Aslam
x ZnO- (1-x) MoO 3 (x = 0.0,0.1,0.3,0.5,0.7) nanocomposite materials have been efficiently fabricated by the facile hydrothermal method to enhance the photocatalytic activities for the environmental applications. The fabricated samples were characterized via XRD , SEM, EDX , XPS, UV–Visible spectroscopy, PL and FTIR analysis. The 5% ZnO-M nanocomposite material exhibits reduced band gab energy and superior photocatalytic activity for rhodamine B (RhB) and alizarin yellow (AY) dyes degradation of 94% and 81% within 120 min under visible light irradiance. Our reported study reveals that the 5% ZnO-M photocatalyst is extremely stable and reusable for more than five reaction of cycles. The photocatalytic enactment of the 5% ZnO-M composite was mostly endorsed due to Z-scheme photocatalysts, higher visible light adsorption on the surface morphology , improved charge separation/transfer, and decreased recombination rate. This study may provide new ideas for developing effective, innovative Z-scheme heterojunction photocatalysts and encouraging their extensive application for the degradation of dyes from wastewater.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Siyuan Tang,Da Chen,Xiameng Li,Changxing Wang,Tingting Li,Jiaxing Ma,Guoqiang Guo,Qinglei Guo
A novel sensor based on dual emissive fluorescent graphene quantum dots is developed for a rapid, selective, sensitive and visual detection of doxycycline (DOX). The ratiometric fluorescent probe is designed by grafting fluorescent group (Rhodamine B, RhB) on F, N -doped graphene quantum dots (FNGQDs). In the presence of DOX, the fluorescence at 466 nm is remarkably quenched due to inner filter effect and fluorescence resonance energy transfer, whereas the peak at 592 nm is attenuated slightly due to the energy transfer in the emission peaks of FNGQDs and RhB functional group. The sensor shows good linear relationship from 0.04 to 100 µM with a low detection limit of 40 nM. Furthermore, the flexible solid-state fluorescent sensing platform is used for detecting DOX in milk, pork and water samples. Therefore, this dual-emission FGQD-RhB can be used as a high-performance fluorescent and visual sensor for food safety and environmental monitoring.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Ying Liu,Jiao Jiao,Qing-Yan Gai,Yu-Jie Fu,Yi-Bo Qiu,Yuan Wang
The extensive use of refractory organic dyes in the textile, printing, paper, food, and pharmaceutical industries is a significant source of water pollution. In this study, a novel magnetic hollow porous copper-based Fenton-like catalyst using cattail sporopollenin as a skeleton support (CSp/Fe 3 O 4 -Cu 2 O) was developed for the first time for the adsorption and efficient degradation of two refractory organic dyes rhodamine B and methylene blue in aqueous environments. Under the optimal conditions, CSp/Fe 3 O 4 -Cu 2 O showed complete ability to degrade the mixed dyes. The degradation kinetic constant of CSp/Fe 3 O 4 -Cu 2 O increased by 10.57 times compared to the control Fe 3 O 4 -Cu 2 O. The hollow porous structure of cattail sporopollenin (CSp) in CSp/Fe 3 O 4 -Cu 2 O not only adsorbed the dyes, but also promoted the continuous generation of active species by facilitating the redox cycling of Cu 2+ /Cu + through the adsorption of Cu 2+ , which synergistically realized the efficient degradation of mixed dyes. Furthermore, CSp/Fe 3 O 4 -Cu 2 O showed promising application potentials as follows: degradation rates of over 96 % for mixed dyes in a wide pH range of 3.0–11.0; complete degradation of mixed dyes in various water matrices including ultrapure water, tap water, and Songhua River water; and degradation rates of over 98 % for mixed dyes after six consecutive cycles. Overall, the novel Fenton-like catalyst CSp/Fe 3 O 4 -Cu 2 O developed in this study was found to be highly promising for the treatment of organic dye-contaminated water in chemical industries. This study also provided new insight into using the excellent adsorption properties of natural sporopollenin for the Fenton-like catalytic degradation of organic pollutants.
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