Catalysts
·
2025
·Vol. 15
·期 2
·175
·
IF 4
Wei Wang,Jiaqi Liu,Guang Shi,Shiqi Wu,Shihan Zhang,Ruixia Yuan
A magnetic shell-structured nano-catalyst was prepared by self-polymerization of dopamine wrapped by ferric oxide as the carrier, which was loaded with palladium nanoparticles (Pd/PDA@Fe3O4). The presence of magnetic Fe3O4made it easy for nanoscale palladium particles to recover and prevent the loss of palladium nanoparticles that is unavoidable in traditional usage and preparation procedures. The catalyst was characterized by X-ray diffraction, fourier transform infrared spectroscopy, scanning electron microscopy, thermal weight loss analysis, Raman spectroscopy, X-ray photo-electron spectroscopy, and magnetic properties analysis. The catalytic performance of the prepared catalyst was investigated taking 4-nitrophenol (10 mg/L) and rhodamine B (15 mg/L) as the target pollutants. The results showed that under the conditions of 35 °C, pH = 7 and a catalyst dosage of 3 mg, the catalytic reduction efficiency of 4-nitrophenol, rhodamine B, and the mixture of them all can reach 99%. The catalytic efficiency of Pd/PDA@Fe3O4remained above 90% after being used 10 times. The shell structure of Fe3O4made it possible and easy to recover and recycle the nanoscale palladium, which was a real problem in the usage of nano-catalysts. At the same time, the problem of separation and recovery of palladium nano-catalyst is solved by magnetism, which provides research ideas for the recycling and utilization of nano-materials.
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2019
·
IF 2.752
Wen Cui,Xiaoli Kang,Xiaoying Zhang,Xudong Cui
A highly efficient Rhodamine B (RhB) adsorbent based on a gel-like ZnO/Zr-metal-organic framework (ZnO/Zr-MOF) composite was prepared by reacting ZnO nanoparticles with glacial-acetic-acid-modulated Zr-MOF(bpy) via a sample solvothermal method. Introduction of ZnO greatly improved the texture properties of the parent Zr-MOF(bpy), and the resulting material exhibited an agglomerate morphology consisting of numerous quadrate nanoparticles, which is quite different from the cubo-polyhedron morphology of Zr-MOF(bpy). In this way, this composite showed a considerable RhB absorption capacity from aqueous solution in a wide pH range. The adsorption kinetics , isotherms and thermodynamics of the RhB adsorption by ZnO/Zr-MOF(bpy) were discussed and confirmed that this adsorption process satisfied pseudo-second-order kinetics and the Langmuir model, and was a spontaneous exothermic process. Moreover, the excellent adsorption performance is likely related to the synergism of hydrogen bonding , electrostatic interactions and π–π interactions between the ZnO/Zr-MOF(bpy) nanocomposite and RhB. The excellent texture properties of ZnO/Zr-MOF(bpy) promote the adsorption and diffusion of RhB on it, which is also crucial during the adsorption process.
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高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Bokai Ma,Fujian Xu,Mian He,Yuqing Lin,Guanghui Hu,Mei Zhang,Xinying Zhao,Weili Liu
Rhodamine B hydrazide (RBH) was prepared as a new derivatizing reagent for residual formaldehyde in a drug such as N-butyl-2-cyanoacrylate (NBCA). RBH reacted with formaldehyde rapidly at room temperature, and the resulting derivative can be detected sensitively at 238 nm. After optimizing the derivatization and chromatographic separation conditions, RBH as a pre-column derivatizing reagent has been successfully used for the analysis of formaldehyde in real NBCA samples by high-performance liquid chromatography (HPLC). The detection limit of the method is 0.004 μg/mL for formaldehyde, and the recovery is 94.0%-96.6%. Most notably, compared with the previous HPLC methods, the developed method has the advantages of mild derivatization temperature, short derivatization time and high sensitivity.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Shinuo Wang,Yinghao Ruan,Ludong Yi,Di Liu,Jun Wang,Dawei Fang,Zhaohong Zhang
In this study, a thermally assisted hydrodynamic cavitation (HC) system was established by adding a water pre-heater in front of the cavitation device (orifice plate), which realizes the local heating of the flowing liquid, intensifies the HC effect and enhances Rhodamine B (RhB) degradation ratio and heat generation efficiency. The effects of preheating temperature, RhB initial concentration, orifice hole number, inlet pressure and solution volume on RhB HC degradation and heat generation were investigated. Free radical trapping experiments were performed to explore the active substances produced by the HC effect. Based on LC-MS and TOC data, the possible RhB degradation pathway and mechanism were proposed. When the preheating temperature rose from 10 °C to 50 °C, the RhB degradation ratio increased from 23.42% to 34.49% within 90 min cycle time, and the treatment cost decreased from 130.699 USD/m 3 to 91.701 USD/m 3 . At 30 min cycle time, the solution temperature rose from 45.6 °C to 56.4 °C, the heat production increased from 149.46 KJ/L to 194.81 KJ/L and the corresponding thermal efficiency increased from 47.45% to 61.84%. Further, at 60 min cycle time, under the conditions of 30 °C preheating temperature, 30 mg/L RhB initial concentration, 3-hole orifice plate, 3 bar inlet pressure and 5.0 L RhB solution volume, the RhB degradation ratio was the highest (40.38%). After Fenton reagent was used, the RhB degradation ratio and heat production both were further enhanced. At 60 min cycle time, the RhB degradation ratio was 65.52%, solution temperature rose to 72.8 °C, the heat production reached 131.83 KJ/L and the treatment cost was only 45.447 USD/m 3 at 30 °C preheating temperature. TOC test results show that the RhB mineralization ratio can reach 61.53% after 90 min cycle. All in all, this work proves that thermally assisted HC is an effective method to degrade organic dyes and generate heat, which can be used for large-scale treatment of organic dye wastewater.
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高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2019
·Vol. 36
·期 2
·236-247
·
IF 2.476
Cui Yanhua,Yang Lili,Meng Minjia,Zhang Qi,Li Binrong,Wu Yilin,Zhang Yunlei,Lang Jihui,Li Chunxiang
A simplified strategy for facilely fabricating antifouling graphite carbon nitride/silver phosphate (g-C 3 N 4 /Ag 3 PO 4 ) nanocomposite photocatalytic polyvinylidene fluoride (PVDF) porous membranes was developed for effective removal of rhodamine B (RhB). g-C 3 N 4 /Ag 3 PO 4 heterojunction was strongly fixed to the interior of the PVDF membranes via phase inversion method. The membrane structure was analyzed by Fourier transform spectrophotometer (FT-IR). The morphology of the prepared membranes was investigated using scanning electron microscopy (SEM), EDX-mapping and atomic force microscopy (AFM), respectively. All prepared nanocomposite photocatalytic PVDF membranes exhibited a typically porous structure, and g-C 3 N 4 /Ag 3 PO 4 nanocomposites were well dispersed inside the membranes. The obtained g-C 3 N 4 /Ag 3 PO 4 heterojunction nanoparticle decorated PVDF membrane had a lower water contact angle of 79° and higher porosity of 85% than that of other two control membranes. The nanocomposite photocatalytic PVDF porous membranes had extremely high permeation flux over 1,083 L·m -2 ·h -1 , and could be used for the removal of RhB. The removal efficiency of g-C 3 N 4 /Ag 3 PO 4 -PVDF membranes towards RhB solution under visible light irradiation reached 97%, higher than that of the pure PVDF membranes (41%) and g-C 3 N 4 -PVDF membranes (85%). Remarkably, the flux performance and flux recovery ratio ( FRR ) of membranes revealed that the g-C 3 N 4 /Ag 3 PO 4 -PVDF membranes could recover high flux after fouling, which presented better fouling resistance. Furthermore, the fabricated antifouling g-C 3 N 4 /Ag 3 PO 4 nanocomposite photocatalytic PVDF porous membranes exhibited excellent recyclability. Therefore, it is expected that g-C 3 N 4 /Ag 3 PO 4 -PVDF membranes could provide an energy-saving strategy for effective removal of organic dyes wastewater and have a great potential for practical wastewater treatment in the future.
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 48
·期 7
·2887-2901
·
IF 3.134
Huang Yan,Xing Wenxin,Zhou Liang,Tian Baozhu,Zhang Jinlong,Zhou Yi
Molybdenum oxide (MoO 3 ), as a transition metal oxide, has excellent catalytic activity, chemical stability, and high application value in the catalytic field. As a typical cocatalyst, noble metals, such as silver and gold, can be decorated with MoO 3 and improve their visible light absorption performance and photogenerated charge separation efficiency to achieve a higher light energy utilization rate. However, the high price of noble metals makes it challenging to realize large-scale industrial applications. Herein, a highly dispersed MoP quantum dot (QDs) decorated MoO 3 nanorods (PMO) was prepared by the co-calcination method to achieve efficient photocatalytic oxidation of target organic contaminants. Rhodamine B (RhB) and norfloxacin (NOR) were used as the model organic contaminants to evaluate the photocatalytic activity of the as-prepared composite photocatalysts. Based on the photoelectric performance and band structure analysis results, the enhancement mechanism of modification with MoP QDs in PMO was proposed. The introduction of MoP QDs in PMO can accelerate electron transfer and achieve a low recombination rate of photogenerated charges. Therefore, the photocatalytic degradation efficiency of RhB and NOR by PMO was higher than that of pristine MoO 3 nanorods and MoP QDs. The degradation efficiency of RhB and NOR could reach more than 97% and 100% within 40 min by PMO-5. Furthermore, photogenerated holes and hydroxyl free radical (·OH) as the primary active oxidants involved in the oxidation process of organic contaminants by PMO-5. PMO-5 still maintained vigorous catalytic activity after five cycles, indicating that it had good chemical stability. This work could provide a new strategy to construct a highly efficient photocatalyst for the efficient degradation of organic contaminants.
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高影响因子
FOOD CONTROL
·
2022
·
IF 6.652
Xuanyu Sha,Siqingaowa Han,Guoqiang Fang,Nan Li,Dianyang Lin,Wuliji Hasi
In this work, a facile and effective method for assembly and transfer nanoparticles on thin layer chromatography (TLC) plate was proposed and used to combined with layer chromatography-surface-enhanced Raman spectroscopy (TLC-SERS) strategy for detection of Rhodamine B and Sudan I. First, Monodispersed Ag NCs with broadly tunable diameters (from 41 to 67 nm) and 7.25 × 10 5 maximum actual enhancement factor (AEF) were successfully prepared and systematically investigated for its optic performance use in TLC-SERS. Au@Ag NCs were monitored by TEM, SEM and UV–Vis spectrometer. The optical properties of Ag NCs were simulated and the experimental results showed good consistency with simulation results of absorption spectra. Through three phases interfacial technique and a simple transfer method, nanostructures were assembled on the TLC plate. Moreover, the semi-quantitative analysis of Rhodamine B and Sudan I in the range of 1–200 ppm was performed based on the assembled TLC plate with the limit of detection as low as 1 ppm. In addition, the practical feasibility of this strategy was verified by the detection of Sudan I and Rhodamine B in chili oil. In general, this assembled TLC-SERS strategy builds a connection for the application of nanomaterials with rich morphology in TLC-SERS, which has a great application prospect and practical application value.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Denis P. Ordinartsev,Andrey A. Rempel,Xiaojun Han
Finding new, effective photocatalysts for the degradation of organic pollutants is a pressing issue in water treatment. Oxide photocatalysts are difficult to synthesize and impractical to use because they are most effective in the form of suspensions, sols, or nanoscale powders. This article demonstrates the photocatalytic ability of a hybrid polyvinyl alcohol-titanyl film photocatalyst to degrade Rhodamine B and formaldehyde. This hybrid material is an easily synthesized alternative to oxide photocatalysts that can be used to photodegrade organic pollutants. 99.8 % of Rhodamine B is degraded in 90 min with a catalyst-to-solution ratio of 1:100 for a 0.05 mM Rhodamine B solution. The film photocatalyst is transparent and colorless, with a band gap of 3.39 eV and an adsorption edge at 354 nm, corresponding to a forbidden direct transition. After irradiation, the photocatalyst's color changed to blue, and new photodegradation activity peaks were registered at 400 and 500 nm. The reversible color change of the photocatalyst enhances light absorption and promotes the effective separation of electron-hole pairs. Based on data from the Scavenger study and TOC measurements, a mechanism for the photodegradation of Rhodamine B on a hybrid polyvinyl alcohol-titanyl photocatalyst was proposed. The structure of the hybrid photocatalyst was characterized using XPS and IR spectroscopy, and the distribution of titanium in polymeric matrix was analyzed by SEM combined with EDX. This work demonstrates the potential of the synthesized polyvinyl alcohol-titanyl hybrid photocatalyst for the efficient photodegradation of organic pollutants.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 44
·期 2
·537-542
·
IF 3.069
Zhenyu Li,Fa Cao,Lei Wang,Zhiwu Chen,Xiaohong Ji
In this article, novel ternary MoS2/MoO3/TiO2 composite catalysts were developed. The photocatalytic performance of the ternary MoS2/MoO3/TiO2 composites was evaluated by photo-degradation of rhodamine B (RhB). It was found that the photocatalytic ability of the composites was strongly dependent on the mass ratio of MoS2–MoO3 to MoS2–MoO3–TiO2. The ternary composite catalyst with optimum composition showed a fast degradation rate (maximum ∼0.138 min−1), which could degrade over 95% of RhB solution (10 mg L−1) within 20 min under visible light (λ > 420 nm) irradiation. The possible photocatalytic mechanism was proposed based on the trapping photocatalytic experiment and band alignment of the composite. The synergistic effect of the strong absorption of the catalyst and the efficient separation of photogenerated electron–hole pairs by the novel ternary composite contributed to the enhanced photocatalytic activity.
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Hongji Li,Dongze Li,Junfu Wang,Haochen Yu,Chengsi Huang,Wei Jiang,Chunbo Liu,Guangbo Che,Dandan Wang
In this work, a novel imprinted sensor based on Ag-modified composite metal organic Frameworks (MOFs) was synthesized for selective detection to Rhodamine B (RhB) in river. UIO-66(NH 2 ) was firstly dispersed on the surface of ZIF-8 with the assistance of PVP, and Ag nanoparticles were dispersed on the surface by in-situ reduction. The ZIF-8/UIO-66(NH 2 )/Ag-MIPs (AZU-MIPs) were synthesized by the process of precipitation polymerization. It was proved from the analysis results that AZU-MIPs presented sensitive and selective detection property to RhB. Furthermore, AZU-MIPs also presented stability and repeatability property during the practical samples detection. There was an obvious linear relationship between concentration and Raman intensity when the concentration of RhB changed between 10 −6 M and 5 × 10 −11 M. The detection of limit (LOD) was 5 × 10 −11 M, and the correlation coefficient (R 2 ) was 0.9984. It could be considered that the novel imprinted sensor presented a promising candidate for Rhodamine B and other organic fluorescent dye detection in the river, and this work also provided an application prospect to the monitor of water environment.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Heng Li,Chengzhong Zhang,Yuhang Jiang,Wenwu Ni,Mingshuo Li,Jing Wang
Widespread dye contamination poses a serious threat to humans and aquatic environments. Metal–organic frameworks (MOFs) with abundant reactive groups and high specific surfaces are candidates for the adsorption of dyes. In this study, good growth of UiO-66-SO3H crystals on the surface of nylon-6 fibers was achieved based on the idea of in situ growth. UiO-66-SO3H with a sulfonic acid group was successfully introduced into nylon-6 electrostatic spinning fiber, and the UiO-66-SO3H@nylon-6 membrane with high specific surface area and a three-dimensional mesh structure was obtained, which effectively solved the problems of clogging of the equipment, difficulty in being separated and recovered from the water, the possible secondary pollution of the water environment caused by the powder form of the MOF material, etc. The UiO-66-SO3H@nylon-6 membrane has a good adsorption capacity for rhodamine B (RhB), and the experimental data are consistent with the pseudo-second-order kinetic model and Langmuir model, which shows that the adsorption is a spontaneous heat absorption process. Pore-filling, hydrogen bonding, π–π interactions, and electrostatic attraction induced by –SO3H are the adsorption mechanisms of RhB on this adsorbent. In conclusion, the UiO-66-SO3H@nylon-6 membrane is an adsorbent capable of rapid adsorption of RhB and can be easily separated from water for recovery, regeneration, and utilization. This study may provide ideas for the application of MOFs in the field of pollutant removal.
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PubMed
高影响因子
Discover Materials
·
2025
·Vol. 5
·期 1
·1-13
·
IF 5.1
Li Jiaxin,Li Xinyuan,Li Xia
In this work, a series of carbon quantum dot (CQDs) modified three-dimensional flower-like BiOCl microspheres were synthesized using a simple solvothermal method.A multitude of techniques like XRD, TEM, XPS, BET, XPS UV–vis, PL and EPR were employed to investigate the morphology, structure, optical and electronic properties as well as photocatalytic performance of the samples. The BC-1.5 photocatalyst displays the he best-performing photocatalytic degradation rate of 99% for Rhodamine B (RhB) degradation under visible-light irradiation within 30 min. The photoactivity is 5.3 times of that of the bare BiOCl. This unique three-dimensional flower-like structure can provide a large number of reaction sites and stronger internal light reflection, which can enhance the absorption of photons. Meanwhile, CQDs enable faster charge transfer and more effective separation of photogenerated charge carriers, thereby increasing the degradation rate. The mechanism of photocatalysis was further proposed, and the charge transfer and active substances formed during photocatalysis were unfolded. This study provides a new opportunity for rational design of efficient photocatalysts in environmental remediation.
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