RSC Advances
·
2019
·Vol. 9
·期 41
·23711-23717
·
IF 3.049
Shu-Hui Huo,Chen-Xu Liu,Peng-Xin Zhou,Jing Yu,Lei Bai,Zhen-Gang Han,Xiao-Quan Lu
Development of novel porous materials for efficient adsorption and removal of environmental pollutants from aqueous solution is of great importance and interest in environmental science and chemistry. Herein, we reported a facile synthesis of recyclable magnetic carbonaceous porous composite derived from iron-based metal–organic framework MIL-100(Fe) for superior adsorption and removal of malachite green (MG) from aqueous solution. Because of large surface area and high porosity, the synthesized magnetic carbonaceous porous material presented a superior adsorption capacity of 2090 mg g−1 for MG. The adsorption of MG on magnetic carbonaceous porous composite is endothermic and spontaneous. The prepared magnetic carbonaceous porous composite could be separated easily and rapidly from the solution matrix by an external magnet. The rapid adsorption, large adsorption capacity and good reusability make it attractive for practical use in the adsorption and removal of dyes from aqueous solutions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Russian Journal of Physical Chemistry A
·
2024
·
IF 0.7
Ding Yan,Guo Chuwen,Li Debo,Lv Maochao,Zhang Xiaowei,Gai Didi,Fu Binbin,Yang Shuairong,Zhao Peitao
Abstract This study aims to investigate the evolution law of the material properties of rice husk (RH) hydrochar under quantitative process water recycling (QPWR) and to evaluate the changes in the adsorption performance of biomass hydrochar to malachite green (MG) with QPWR. In this study, 6 groups of RH samples were subjected to hydrothermal carbonization (HTC) experiments at 220°C, respectively. Except for the first HTC, which did not contain QPWR, the subsequent 5 HTC experiments all included the 100 mL process water from the previous HTC. The results demonstrated that after using QPWR, the mass yield (MY) of hydrochar increased from 68.51% without QPWR to 75.51% in the third QPWR; The carbon content increased from 58.09% of no QPWR to 76.63% of the fifth QPWR. Meanwhile, the volatile content decreased slowly from 42.70% without QPWR to 39.75% under the fifth QPWR, while the ash content increased slightly from 20.94% without QPWR to 21.45% under the fifth QPWR. SEM analysis showed that QPWR was beneficial to the decomposition and degradation of RH in HTC and promoted the accumulation of intermediates on the surface of hydrochar. BET-specific surface area and pore volume determination confirmed that QPWR could increase slightly the specific surface area and pore volume of hydrochar. Besides, the hydrochar produced by each HTC was used to adsorb malachite green, respectively. The results showed that the QPWR enhanced the adsorption performance of hydrochar, and the Langmuir–Freundlich adsorption model was more suitable to fit the adsorption law. These results highlighted the potential of QPWR in improving the application of biomass hydrochar.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Yan Lin,Shaohua Wu,Xiang Li,Xin Wu,Chunping Yang,Guangming Zeng,Yanrong Peng,Qi Zhou,Li Lu
Visible-light-driven photocatalysis as a promising technology has recently attracted great attention in environmental remediation. In this work, novel Z-scheme heterojunction photocatalysts Ag 3 PO 4 @MWCNTs@Cr:SrTiO 3 with excellent visible-light-driven photocatalytic performance and photostability were successfully synthesized and characterized. The photocatalytic activity for malachite green (MG) degradation was measured, and photodegradation mechanisms were investigated using GC–MS, ESR, and radical trapping experiments. On consideration of the practical applications, the effects of coexisting ions and pH were also evaluated. Results showed that significant changes of crystal size and micro-morphology for Ag 3 PO 4 were observed before and after the addition of MWCNTs, which transformed from a polyhedron with a diameter of about 30 μm into a spherical-like crystal with a diameter of 0.28–0.69 μm. This phenomenon was reported for the first time. The optimal catalyst with a dosage of 100 mg/g (the mass ratio of pollutant to photocatalyst) could reach 100% MG removal in 6 and 10 min under natural solar radiation and visible light irradiation, respectively. Results from the radical trapping experiments and ESR analysis confirmed that there existed the Z-scheme transfer mechanisms, and O 2 − and h + played an important role during the photocatalytic degradation. Several small molecular organic acids such as acetic acid, glyoxylic acid, fumaric acid and benzoic acid were detected by GC–MS in the photodegradation products of MG, which further indicates that photocatalytic degradation pathway involved N -demethylation, benzene removal and open-ring reactions. The performance of the photocatalyst would be inhibited under strong acid condition or at the coexistence of certain concentration of Cr 6+ and Cl − . The novel addition of MWCNTs in the preparation and the changes of crystal structure and properties for the photocatalysts have the potential to promote the application of the photocatalysts for environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Feina Niu,Panpan Jiang,Lei Wang,Yawen Gao,Hong Zhu,Nan Gao,Zhiwei Cai,Hanping He,Yunbin He,Gang Chang
Raman studies have consistently emphasized the precise detection of target analytes by strategically manipulating the morphology and structure of noble metal nanomaterials. In this study, the nanorods with Ag shell and Au nanobipyramid core (Au NBPs@Ag) were designed and prepared through the weting chemcial method. The length of the nanorods can be adjusted from 131 ± 8 nm to 165 ± 23 nm by controlling the amount of Ag precursor, while keeping their width constant. According to the size of Au NBPs@Ag nanorods, surface-enhanced Raman scattering (SERS) performance would change significantly, and the optimal signal response was achieved when the aspect ratio of Au NBPs@Ag nanorods was 4.43. This can be due to the synergistic effect of gold core and silver shell changed by nanorods morphology, which further affected SERS performance. Moreover, Au NBPs@Ag modified polydimethylsiloxane (PDMS) flexible substrate was developed through interface self-assembly technology, allowing for sampling on irregular surfaces. The flexible SERS substrate was successfully applied to detect malachite green in contaminated river bass with wide linear range from 0.1 nM to 10 μM and detection limit of 0.1 nM. These results indicated that Au NBPs@Ag nanorods SERS substrate had great potential in the rapid trace detection of environmental detection and food safety.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Weijie Hua,Yong Kang,Huixin Yuan
The effective and rapid treatment of emerging pollutants in water is an essential solution to the pollution of water environment. The emerging pollutant-malachite green (MG) wastewater was treated using pulsed discharge plasma on water surface system (WSP) combining Fe 2+ /PMS. Compared with WSP alone, the addition of 125 μM Fe 2+ and 0.5 mM peroxymonosulfate (PMS) in WSP could enhance the degradation efficiency and energy efficiency of MG by 32.8% and 9.7% respectively, with the synergistic factor of up to 2.056. UV–Vis absorption spectra and mineralization further demonstrated the synergistic effect. When the peak voltage and air flow rate were 22 kV and 0.7 L/min, the degradation efficiency and kinetic constant of MG could reach 97.9% and 0.259 min −1 , respectively. MG degradation with high conductivity (1000 μS/cm) by WSP + Fe 2+ /PMS not only exhibited the better purification effect, but also could maintain the faster reaction rate. The active species involved in the degradation of MG in WSP + Fe 2+ /PMS system were mainly ·OH, SO 4 · − , O 2 · − and e* − . Furthermore, H 2 O 2 and O 3 also have a certain oxidizing effect on MG. Cl − , SO 4 2− , HCO 3 − and humic acid (HA) could inhibit MG degradation to some extent, but still removed more than 80% of MG in water. The WSP + Fe 2+ /PMS reaction system was suitable for the treatment of other emerging pollutants in water. The results of LC-MS analysis revealed that the N-demethylation reaction and decomposition of conjugated structure were the important pathways for MG degradation. The H 2 O 2 and acidic liquid environment provided by WSP laid the foundation for the formation of Fenton, and the introduced Fe 2+ could fully undergo the Fenton and activation reaction with H 2 O 2 and a small amount of PMS in the liquid phase, which enhanced the generation of active species, especially · OH.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2025
·
IF 1.3
Weixin Liang,Chang Wang,Yumei Song,Jingui Huang,Zhenwei Liao,Yongqian Lei,Pengran Guo
We report a rapid method for the selective enrichment and sensitive detection of malachite green (MG) in aquaculture water. Magnetic molecularly imprinted polymers (MMIPs) prepared via Pickering-emulsion polymerization were employed in a magnetic dispersive SPE workflow prior to surface-enhanced Raman spectroscopy (SERS). Partial least squares (PLS) models were built on preprocessed SERS spectra to predict MG concentrations. The optimised model achieved excellent linearity (R train =0.9897; R test =0.9836), a detection limit of 0.19 ng/mL, and spike recoveries of 80 to 110% in real aquaculture water. Results were benchmarked against HPLC, showing good agreement. The method integrates selective preconcentration with portable SERS readout, enabling on-site MG screening with high sensitivity and short turnaround. The method demonstrated good robustness and accuracy under the optimized pH, adsorption time, and MMIPs mass conditions. This combined MI-MDSPE/SERS-PLS strategy provides a practical route for rapid monitoring of MG in aquaculture settings.
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2020
·
IF 5.339
Bingxue Hu,Da-Wen Sun,Hongbin Pu,Qingyi Wei
A universal surface-enhanced Raman scattering (SERS) substrate with tuneable plasmonic behaviour and long-term stability was synthesized and characterized, and the substrate was applied in the sensitive detection of fungicide malachite green (MG) in fish fillets. Temperature-responsive poly (N-isopropyl acrylamide) (pNIPAM) template and anisotropic Au nanorods (NRs) were synthesized to prepare pNIPAM @ Au NRs nano-hybrids with dynamically optical and SERS properties and high stability. Results showed that excitation wavelength-dependent SERS efficiency could be tailored by temperature-induced swelling and collapse of the nano-hybrids, thus anticipated optical and SERS properties of the composites could be obtained. Furthermore, the SERS performance, uniformity, long-term stability analysis, and MG in fish evaluation showed that the detection of MG in fish tissues was realized with a limit of detection of 1.58 × 10 −9 M (0.73 ng/g), and the pNIPAM @ Au NRs composites could serve as effective SERS substrates allowing trace level detection of contaminants for the food industry.
✓ 已验证
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 4
·1-12
·
IF 5.3
Ruan Shuyan,Wang Wenxi,Qiu Liting,Yan Xin,Peng Zhihua,Zhu Huina,Liu Yunzhen,Lu Yudong,You Ruiyun
A simple and cost-effective fabrication method of gold nanorods (AuNRs) nanoparticles hybridized with polyvinyl alcohol hydrogel (AuNR/PVA) for SERS substrate is described. The AuNR/PVA achieves the control of inter-particle nanogap by modulating the density of gold nanorods, and inter-particle nanogap by the spatial deformation of the hydrogel, and the reduction of the gap between the AuNRs deposited on hydrogel makes the SERS enhancement. In addition, the AuNR/PVA substrate maintains high SERS activity after more than 100 cycles of bending and storage in air for 30 days, and the substrate possesses high sensitivity and high reproducibility. Combining a flexible and transparent surface-enhanced Raman spectroscopy (SERS) substrate for in situ detection with a small portable Raman can be applied to scenarios such as environmental detection and hazardous materials detection. The substrate showed excellent SERS activity against malachite green (MG) and crystal violet (CV) with limits of detection of 1.18 × 10 −13 M and 7.17 × 10 −12 M, respectively. The usability of the proposed SERS substrate was demonstrated by detecting the above contaminants in aquatic water. This work not only utilizes a cost-effective method for mass production but also provides a reliable and convenient platform for the preparation of other noble metal flexible substrates. Graphical
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 11
·1-16
·
IF 5.3
Zhuang Dengke,Guo Hao,Wei Yuli,Yu Zhiguo,Peng Liping,Ma Yanyan,Hui Yingfei,Yan Yu,Yang Wu
A sensitive and accurate ratiometric fluorescent sensor (RhB@UIO-67) is constructed by simply encapsulating rhodamine B (RhB) within a zirconium-based metal–organic framework (UIO-67). Based on the inhibition effect of ligand–to-metal charge transfer, adenosine triphosphate ATP induces a significant enhancement in the MOF centre emission, but does not affect the fluorescence of RhB in the probe material at all, which are respectively employed as detection signal and reference signal to realize sensitive ratiometric fluorescence detection of ATP in human serum and urine with a detection limit (LOD) of 0.45 μM. In particular, since the introduction of the target molecules does not cause any structural degradation, the sensor can be reused. Additionally, due to fluorescence resonance energy transfer between the probe components and malachite green (MG), addition of MG results in different degrees of quenching of the fluorescence emissions of UIO-67 and RhB in the RhB@UIO-67 and thus the probe material can simultaneously serve as a sensitive ratiometric sensing platform for MG detection in aquatic products including fish and shrimp with a low LOD of 0.03 μM. Benefited from its simplicity, sensitivity, and reusability, the sensing material has a wide application potential. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 5
·826
·
IF 4.324
Lingzi Zhang,Jun Liu,Guowei Zhou,Zhiliang Zhang
In this work, a series of highly flexible and sensitive surface-enhanced Raman scattering (SERS) substrates were fabricated by the in-situ growth of silver nanoparticles (AgNPs) on polydopamine (PDA) templated filter papers (FPs), based on mussel-inspired surface chemistry. The obtained FP@PDA@AgNPs strips exhibited high sensitivity and reproducibility with Rhodamine 6G (R6G) probe molecules, with a calculated detection limit of approximately 10−10M. More critically, these FP@PDA@AgNPs strips could be used as outstanding flexible SERS sensors to quickly collect and detect malachite green (MG) residues on fish scales, crab shells and shrimp skins by a swabbing extraction method. The detection limits for MG residues were calculated to be approximately as low as 0.04635 pg/cm2, 0.06952 pg/cm2and 0.09270 pg/cm2, respectively. This facile and efficient strategy could to be utilized as a universal approach to fabricating a variety of flexible, cheap and portable SERS sensors for surface contamination analysis, and has great potential in the environmental scientific analysis and food safety monitoring fields.Keywords:surface-enhanced Raman scattering;silver nanoparticles;polydopamine;filter paper;malachite green
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2018
·
IF 2.891
Hui Ran,Zheng-zhong Lin,Cheng-yi Hong,Jun Zeng,Qiu-Hong Yao,Zhi-Yong Huang
Rapid detection of malachite green (MG) by fluorescence probes of CdTe quantum dots (QDs) coated with molecularly imprinted polymer (MIP) has been reported, but low sensitivity, slow response and narrow linear range were the main disadvantages for these MIP@QDs probes. Here, an ultra-sensitive ratiometric fluorescence probe based on self-assembly functionalized polystyrene (PS) and core-shell structured MIP was developed for the detection of MG in fish. After modified with poly(diallyldimethylammonium chloride) and hexadecyl trimethyl ammonium bromide, CdTe QDs and silica encapsulated carbon quantum dots (CDs@SiO 2 ) with negative charges, used as detection and reference fluorophores, were respectively self-assembled on the surface of PS to form PS-QDs&CDs. And a core-shell structured MIP layer was fabricated on the surface of PS-QDs&CDs to form a ratiometric fluorescence probe of MIP@PS-QDs&CDs with sol-gel method using MG, (3-aminopropyl)triethoxy-silan and tetraethyl orthosilicate as template, functional monomer and cross-linker, respectively. With intensive fluorescence densities of QDs&CDs in nucleus, the fluorescence emission of probe at λ em of 630 nm could be linearly quenched by MG, while the fluorescence emission at λ em of 430 nm remained unchanged. The probe of MIP@PS-QDs&CDs owned good fluorescence stability (RSD ≤2.3%), fast response time (5 min), wide linear range (0.1–32 μmol L −1 ) and low detection limit (5.6 μg kg −1 ), and has been applied to the detection of MG in fish samples with recoveries of 94.3–110.2%. The result validated that the as-prepared probe of MIP@PS-QDs&CDs had an excellent performance for MG detection in fish samples.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ming Chen,Jinhui Liu,Yuke Kong,Wenxiu Zheng,Yong Wang,Xueyan Zou,Yuguang Wang,Yangyang Wang
Co-contamination of wastewater with toxic metals and dyes pose a severe threat to ecosystems and human health. In the present study, a novel surface-etched mercapto-functionalized porous nanosilica microsphere (E-MPNS) was prepared for the simultaneous removal of Cd(II) and malachite green (MG) from wastewater. The effects of various environmental factors on Cd(II) and MG adsorption and their adsorption mechanisms are elucidated in detail. The results showed that the E-MPNS exhibited a relatively higher specific surface area (272.06 m 2 /g). The maximum adsorption capacities of E-MPNS for Cd(II) and MG were 436.68 and 3831.08 mg/g in the single system and 433.66 and 1932.18 mg/g in the binary system, respectively. The adsorption mechanisms of E-MPNS were surface complexation and ion exchange for Cd(II) and hydrogen bonding and electrostatic attraction for MG. Density functional theory calculation revealed that the E-MPNS-Cd(II) complex had a higher molecular stability and lower reactivity compared with that of E-MPNS-MG, and the energy gaps of the E-MPNS-Cd(II) (1.15 eV for SH and 0.71 eV for OH) were markedly larger than those of the E-MPNS-MG (0.69 eV for SH and 0.52 eV for OH). Moreover, the E-MPNS exhibited good biocompatibility with bacteria and plants. These results indicate that the E-MPNS is a promising adsorbent for remediating of Cd(II) and MG co-contaminated wastewater.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）