SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Meesam Ali,Usman Farooq,Shuguang Lyu,Yong Sun,Ming Li,Ayyaz Ahmad,Ali Shan,Zain Abbas
Various controlled release calcium peroxide nanoparticles (CR-nCPs) were synthesized and their characteristics and effectiveness in trichloroethylene (TCE) degradation were assessed. In this concern, calcium peroxide nanoparticles (nCPs) were initially prepared with four different surface stabilizers (PEG 200, PVP, PVA and DEGMME) to inhibit the irreversible agglomeration of nCPs by chemical precipitation method, then CR-nCPs were further synthesized by the coating of the selected polymers on nCPs. The characterizations of nCPs and CR-nCPs were performed using XRD, FESEM, TEM, FTIR, BET and TGA techniques. The results displayed the prepared nCPs in nano size with good dispersion, reliable purity, and standard surface area. The characterizations of CR-nCPs confirmed the success of polymer coating on nCPs. The H 2 O 2 release profiles of the prepared CR-nCPs were determined by UV spectrophotometer. PVA@nCP-PVA has shown the maximum H 2 O 2 controlled release efficiency (CRE) of 50.2%. The prepared CR-nCPs were tested for TCE degradation at optimum conditions of Fe(II) = 1.1 mM and CR-nCPs = 50 mg/L. The maximum removal percentages of 99.7% after 120 min and 66% after 180 min were achieved by CR-nCPs having moderate CRE (16.0–20.3%) and high CRE (50.2%) respectively. It was found that the CRE of CR-nCPs and their TCE degradation efficiencies have an inverse relationship. The CR-nCPs with moderate CRE were further employed for investigating the effect of polymer coating with increased polymer quantity (1:40). With the increase in polymer coating quantities, TCE removal percentages of 98.17%, 82.02% and 79.29% were obtained by PEG 400@nCP-DEGMME, DEGMME@nCP-DEGMME and PEG 400@nCP-PEG 200 after 360 min, respectively. In conclusion, this work suggests that CR-nCPs with moderate and high CRE are advantageous, in long term effectiveness, to potentially degrade TCE in groundwater remediation practice.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
ACS Omega
·
2018
·
IF 0
Feng Pan,Yilin Zhang,Zhiqin Yuan,Chao Lu
Carminic acid (CA) extracted from cochineal is widely used in food additives as a natural colorant, and its potential risk to human health makes its detection important. In this work, a layered doubled hydroxide (LDH)–luminol–H2O2 system-based chemiluminescence (CL) platform has been successfully applied for CA sensing. The principle detection consists of two steps: first, LDH adsorbs CA onto the surface via electrostatic attraction; second, CA quenches the CL of the LDH–luminol–H2O2 system via the synergistic effect of CL resonance energy transfer, reduction of reactive oxygen species, and occupation of positively charged centers of brucite-like layers. With this CL approach, 0.5 μM CA is detectable using a CL spectrometer, and the limit of detection is 0.03 μM. This CL system exhibited a linear response to CA in the concentration range from 0.5 to 10 μM. In addition, the practical application of the designed CL sensing system is evaluated with dried pork slice samples.
研究领域:
分析化学
·
食品科学
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生物技术
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产品关联
DOI
PubMed
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yi Zhang,Qi Wang,Dongming Liu,Qian Wang,Tong Li,Zhou Wang
A novel isotype (p-p) heterojunction, on the basis of Cu 2 O coupled with BiOI, has been designed and synthesized via a facile two-step electro-deposition approach at room temperature. The morphology, phase compositions and chemical bonding state were verified by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction measurements (XRD) and X-ray photoelectron spectra (XPS). The optimized Cu 2 O/BiOI hybrid electrode exhibited boosted photoelectrochemical (PEC) H 2 O 2 non-enzymatic sensing performance under visible light illumination, with a phenomenally broad linear range (1.99 µM ~ 17.54 mM), a high sensitivity of 213.87 µA mM −1 cm −2 , as well as a low detection limit of 0.44 µM (S/N = 3). Additionally, the sensor presented satisfying selectivity, repeatability, stability and its feasibility in real samples was corroborated. The photoelectrochemical sensing mechanism was clarified in the view of band structure and p-p heterojunction. Our work would enlighten the perspective research on the application of isotype heterojunction in PEC bio-sensing and provide a promising non-enzymatic biosensor platform for effective detection of H 2 O 2 in food, biomedical and environment analysis.
研究领域:
材料科学
·
生物医学工程
·
分析化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Yanbin Wang,Di Meng,Xu Zhao
Visible-light-driven H 2 O 2 production from O 2 reduction is an eco-friendly strategy and attracts increasing attentions. In this study, KOH modified graphitic carbon nitrides (CNKx) were constructed through the thermolysis of melamine-cyanuric acid supramolecular-complex in the presence of KOH. The BET specific surface area of CNK 0.2 with porous structure was 92 m 2 g −1 . The photocatalyst was characterized by XPS, ESR and element analysis and the analysis suggested that nitrogen vacancy was created in the framework of g-C 3 N 4 . Photoluminescence (PL) spectra indicated that the recombination of photogenerated electrons and holes was efficiently suppressed. ζ-potential revealed that more negative charge on the surface of CNK 0.2 , which promoted the adsorption of O 2 and accelerated the photocatalytic H 2 O 2 production. ESR experimental and radical quenching results illustrated that superoxide radical (O 2 - ) was the primary intermediate during the O 2 reduction process, suggesting the O 2 reduction pathway by CNK 0.2 was the sequential two-step single-electron reduction.
研究领域:
材料科学
·
环境科学
·
光催化
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Wei Zhou,Xiaoxiao Meng,Jihui Gao,Fei Sun,Guangbo Zhao
s Hydrogen peroxide (H 2 O 2 ) electrosynthesis from 2-electron O 2 reduction reaction (2eORR) is widely regarded as a promising alternative to the current industry-dominant anthraquinone process. Design and fabrication of effective, low-cost carbon-based electrodes is one of the priorities. Many previous work well confirmed that hydrophilic carbon-based electrodes are preferable for 2eORR. Here, we proposed a strategy of hydrophilicity-hydrophobicity regulation. By using commercially available graphite felt (GF) as electrodes, we showed that both hydrophilic GF, hydrophobic GF, and Janus GF yielded significantly higher H 2 O 2 production, which is 7.3 times, 7.6 times, and 7.7 times higher than the original GF, respectively. Results showed that currents and stirring rates affect the H 2 O 2 yields. The enhancement of hydrophilic GF is due to the incorporation of oxygen-containing functional groups, while the hydrophobic and Janus GF comes from the locally confined O 2 bubbles, which built a gas-liquid-solid interface inside GF and thus enhance the H 2 O 2 formation kinetics. Finally, the effectiveness of the hydrophilicity-hydrophobicity regulation concept was tested in Electro-Fenton process by removing typical dyes and antibiotics. This work supply an effective but facile strategy to enhance the performance of carbon-based electrodes towards 2eORR by regulating the micro-environment of electrodes.
研究领域:
环境科学
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电化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Guangrong Liu,Mingxin Chen,Xin Jin,Chuangfu Song,Feifei He,Qiang Huang
In this work, 12-tungstophosphoric acid-TiO 2 composite (PTA-TiO 2 ) catalysts were fabricated by a simple method of impregnation-heat treatment. PTA-TiO 2 composites were characterized by XRD , XPS, TG/DSC, FTIR , UV−vis diffuse reflectance spectra and N 2 adsorption–desorption measurements. The results showed that the heat treatment temperature (200–500 °C) significantly affected the composition and structure of the composite. The higher calcination temperature could destroy the Keggin structure of PTA. The PTA-TiO 2 catalyzed oxidation of cyclohexene by H 2 O 2 to adipic acid demonstrated that the Keggin structure of PTA was critical to the catalytic activity of PTA-TiO 2 . Furthermore, under the photo-thermal catalytic condition, the reaction system showed higher cyclohexene conversion and adipic acid yield. A synergistic effect between the photo- and thermal approach was noticed in the PTA-TiO 2 catalyst prepared at 200 °C (PTA-TiO 2 (200)). Based on the experimental data, a thermocatalysis-dominated but photocatalysis-promoted mechanism was proposed to explain the improvement in catalytic efficiency. The catalyzed oxidation of cyclohexene with photo-thermal synergy enables utilization of sunlight and offers a novel perspective for the manufacture of adipic acid.
研究领域:
催化
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化学工程
·
光化学
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材料科学
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DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2018
·Vol. 20
·期 9
·1-10
·
IF 2.127
Li Dong,Fang Minjie,Jiang Chunli,Lin Hechun,Luo Chunhua,Qi Ruijuan,Huang Rong,Peng Hui
Bismuth selenide (Bi 2 Se 3 ) has attracted great attention as one of typical topological insulator materials. In this work, size-controllable Bi 2 Se 3 nanoflowers (NFs) composed of numerous thin nanosheets are successfully synthesized by a hot-solution injection method under mild conditions. The structure and morphology of the obtained Bi 2 Se 3 NFs are characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopic (EDS), and selected area electron diffraction (SAED) techniques. The reaction temperature, time, and surfactant ratio (oleylamine/oleic acid) affect the phase purity and morphology of Bi 2 Se 3 samples. Based on the experimental results, the formation mechanism of Bi 2 Se 3 nanoflowers is proposed. Meanwhile, the photocatalytic behavior of the as-prepared Bi 2 Se 3 nanoflowers in the presence of H 2 O 2 is explored and it is found that the degrading rate of RhB can reach 93% after 2 h visible light irradiation.
研究领域:
材料科学
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纳米技术
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Bo Yang,Tuo Wei,Ke Xiao,Jianping Deng,Gang Yu,Shubo Deng,Juying Li,Caizhen Zhu,Huabo Duan,Qiongfang Zhuo
A novel electro-generated hydroxyl radical ( OH) technique was constructed to effectively degrade the anti-epilepsy carbamazepine (CBZ) representing typical recalcitrant pharmaceutical only through electrochemical method as an alterative peroxone process. The technique involves simultaneously electro-generated H 2 O 2 using a carbon-polytetrafluoroethylene (C/PTFE) cathode to reduce the injected O 2 and electro-generated O 3 using H 2 O oxidation with a Ti mesh/PbO 2 anode in membrane electrode assembly (MEA). The significant OH formation through the synergetic system of in-situ produced H 2 O 2 and O 3 electrochemically could achieved carbamazepine decomposition and total organic carbon (TOC) removal as compared to electro-generated H 2 O 2 or O 3 alone. The main influential factors including current density and aqueous pH were investigated to reveal their effect on CBZ removal efficiencies. Under optimal parameters, CBZ decomposition and TOC mineralization could be completely accomplished after 10 min and 90 min electrolysis, respectively. According to intermediates distribution (e.g. hydroxylated CBZ, phenolics, and carboxylic acids) identified by HPLC-MS/MS, the degradation pathways were proposed for CBZ removal by the synergetic system of C/PTFE-O 2 and MEA. The above results indicated that this electrochemically synergetic system is a potential technique to further purify the water contaminated by recalcitrant pharmaceuticals.
研究领域:
环境科学
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药学
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产品关联
DOI
高影响因子
Sensors and Actuators Reports
·
2025
·
IF 7.6
Hui Dong,Linlin Zheng,Zuying Wang,Ke Xu,Wentian Chen,Zi Liu,Zhu Chang,Yanli Zhou,Xu Zhu,Yintang Zhang,Maotian Xu
Accurate diagnosis and effective treatment of Parkinson's disease (PD) rely on the accurate detection of the corresponding biomarkers. The build-up of reactive oxygen species (ROS), for instance, hydrogen peroxide (H 2 O 2 ), resulting in oxidative stress inside cells is closely related to the pathogenesis of PD. In this study, two compounds, Re-B and Re-OB, were synthesized through a simple one-step reaction. Upon reacting with H 2 O 2 , the borate ester group in Re-B is selectively cleaved, restoring the phenol group. This leads to both a dual-signal ratiometric electrochemical response and a ``turn-on'' fluorescence effect. The Re-B probe demonstrates a clear ``turn-on'' electrochemical current response at −311.1 mV, followed by a ``turn-off'' response at −257.6 mV when interacting with H 2 O 2 on a single-walled carbon nanotube-modified screen-printed carbon electrode (SPCE/SWCNTs). Concurrently, the fluorescence spectrum shows a ``turn-on'' response with an emission peak at 586 nm. The fluorescence and ratiometric electrochemical methods developed in this study show exceptionally high sensitivity and selectivity for H 2 O 2 , with detection limits as low as 0.5 μM for the electrochemical method and 0.1 μM for fluorescence. The consistency between the results from both electrochemical and fluorescence quantification of H 2 O 2 levels in serum underscores its reliability. This approach has significant potential as a point-of-care diagnostic device for PD early detection, providing valuable information for timely diagnosis and treatment.
研究领域:
医学诊断
·
生物传感
·
神经科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Fang Wang,Miao Li,Zonghao Zhang,Yan Du,Yaxin Shang,Wenting Li,Yongfa Zhu,Yifei Wang
Photocatalytic synthesis of hydrogen peroxide (H 2 O 2 ) from H 2 O and O 2 is economically attractive, but its sluggish kinetics are challenging due to ineffective electron–hole separation. A novel photocatalyst for scalable H 2 O 2 production (SA-PDI@PDA) was constructed from self-assembled perylene diimide (SA-PDI) modified with dopamine (PDA) via electrostatic interaction. The donor–acceptor interface generates a 1.6-fold stronger interfacial electric field that enhances charge separation and enables the extraction of highly reductive electrons that increase the H 2 O 2 production rate 5.4-fold. The phenolic groups in PDA act as proton pockets, providing additional protons that accelerate H 2 O 2 production to 4873 μmol g⁻¹ h⁻¹ , with an apparent quantum yield of 12.35 % at 420 nm. This study provides valuable insight into the design of photocatalysts for enhanced and sustainable H 2 O 2 generation that is suitable for in situ sterilization and organic pollutant degradation applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Hao Zhang,Meng Liu,Xingyang Zhang,Biao Yuan,Pan Wu,Changjun Liu,Wei Jiang
Hydrogen peroxide (H 2 O 2 ) can be photocatalytically generated by oxygen in water with fatty alcohols as a sacrificial agent; however, it is expensive to separate because of the miscibility of fatty alcohols and water. In this work, H 2 O 2 is directly generated photocatalytically using amphiphilic graphitic carbon nitride (g-C 3 N 4 ) and oxygen in pure anhydrous oily benzyl alcohol (BA) alone; it is simply extracted by water and separated using a hydrophobic/lipophilic mesh to obtain a high-concentration H 2 O 2 aqueous solution. The results show that the H 2 O 2 concentration in BA after 4 h of photoreaction is 9.45 mM and that of the final solution product can be as high as 70.93 mM in water. Water does not enhance the photoreaction; instead, unexpectedly, it weakens it. However, it is possible to completely extract the H 2 O 2 from the reacted BA. In this study, the H 2 O 2 solution is rapidly separated from the BA with a separation efficiency of 99.97% using a hydrophobic mesh. The photocatalyst g-C 3 N 4 is present at the water/BA interface owing to its amphiphilicity, and it can be caught by the mesh during separation and reused after backwashing. The combined photoreaction, extraction, and separation processes provide a simple, environment-friendly, and rapid H 2 O 2 photogeneration process for the on-site production of a usable H 2 O 2 solution.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
EXPERIMENTAL EYE RESEARCH
·
2024
·
IF 3
Di Li,Xuanyi Che,Ningning Gao,Jing Li
Previous studies have shown that the development of age-related cataract (ARC) is involved in lens epithelium dysfunction, which is associated with abnormally expressed circular RNAs (circRNAs). The current work aims to probe the role of circSTRBP (hsa_circ_0088,427) in hydrogen peroxide (H 2 O 2 )-induced lens epitheliums. Lens epithelium tissues were harvested from ARC or normal subjects (n = 23). CircSTRBP, spermatid perinuclear RNA binding protein (STRBP), and nicotinamide adenine dinucleotide phosphate oxidase subunit 4 (NOX4) levels were measured using quantitative reverse transcription polymerase chain reaction (qRT-PCR). Cell proliferation, cycle progression, and apoptosis were assessed using 5-ethynyl-2′-deoxyuridine (EdU), Cell Counting Kit-8 (CCK-8), and flow cytometry assays. Caspase 3 activity, reactive oxygen species (ROS), malondialdehyde (MDA), and Glutathione peroxidases (GSH-PX) levels were detected using corresponding kits. NOX4 protein level was determined using Western blot. The interaction between insulin-like growth factor 2 mRNA-binding protein 1 (IGF2BP1) and circSTRBP or NOX4 was assessed through RNA immunoprecipitation (RIP). CircSTRBP and NOX4 abundances were increased in lens epithelium samples from ARC patients and H 2 O 2 -treated SRA01/04 cells. CircSTRBP knockdown might abolish H 2 O 2 -triggered SRA01/04 cell proliferation repression and apoptosis and oxidative stress promotion. In mechanism, circSTRBP is bound with IGF2BP1 and improves the stability and expression of NOX4 mRNA in SRA01/04 cells. CircSTRBP facilitated H 2 O 2 -induced SRA01/04 cell apoptosis and oxidative stress through by enhancing NOX4 mRNA stability via recruiting IGF2BP1, providing novel insights for ARC progression and treatment.
研究领域:
分子生物学
·
细胞生物学
·
眼科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）