JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
·
2022
·
IF 5.168
Han Jia,Daofan Wang,Qiuxia Wang,Jiajun Dai,Qiang Wang,Shijie Wen,Zhe Wang,Bowen Wang,Xincan Jiang,Xu Li,Kaihe Lv
Mixed nanoparticle stabilized Pickering emulsion is a novel research topic, which has been attracted more attention. In the present study, the novel amphiphilic GO-Janus SiO 2 -Cn nanoparticles (GOJS-Cn, n represents the number of carbon atoms in the modified alkyl chain) were successfully fabricated for the first time and investigated their ability in stabilizing Pickering emulsions for enhancing oil recovery. Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were employed to determine the successful fabrication of the GOJS-Cn. The optical microscopy was utilized to directly observe the GOJS-Cn (n = 0, 3, 8, and 12) stabilized emulsions and the static multiple light scattering was employed to further evaluate its stability quantitatively. It was found that the GOJS-C12 displayed the greatest ability to stabilize emulsions, even in high salinity (10 4 mg/L NaCl/MgCl 2 /CaCl 2 /AlCl 3 ) and temperature (90 °C). Then, the interfacial tension, water contact angle, and dilatational measurements were conducted to reveal the mechanism of the GOJS-C12 superior emulsifying ability. The amphiphilic GOJS-C12 with great amphiphilicity spontaneously adsorbed at oil-water interface to promote the formation of rigid interfacial film, which was essential for the long-term stability of emulsion . Moreover, the core flooding tests reflected the GOJS-C12 stabilized emulsion could significantly enhance oil recovery (∼14.8%), then based on microscopic visualization experiments the potential EOR mechanism was proposed.
研究领域:
材料科学
·
石油工程
·
界面化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Fei Ma,Chao Wang,Yutong An,Yajie Liu,Xiaorong Xin,Kaicai Fan,Lei Wang,Guanjun Chen,Zhiqiang Hu,Tianrong Zhan
Cheap and advanced electrocatalysts for the oxygen evolution reaction (OER) are vitally significant but challenging for seawater electrolysis. Herein, a glow discharge N2 plasma is used to etch the [Fe(CN)6]4– group of the NiCoFe Prussian blue analogue (PBA) framework by highly reactive nitrogen radicals (the catalyst named N2-NiCoFe-PBA). Abundant CN vacancies (VCN) generated by this etching effectively suppress the Fe loss from N2-NiCoFe-PBA, while the lack of VCN results in the Fe leaching from the NiCoFe-PBA precursor during the anodic process. Consequently, N2-NiCoFe-PBA and NiCoFe-PBA are transformed into real active phases of NiCoFeOOH and NiCoOOH during the OER process, respectively. Theoretical calculations display that NiCoFeOOH has superior adsorption capacity toward OH– over Cl– to NiCoOOH, which is beneficial to excellent OER activity and anticorrosion performance in alkaline seawaters. In alkaline simulated and natural seawater, N2-NiCoFe-PBA exhibits much better OER performance with smaller η100 (293 and 323 mV) than NiCoFe-PBA (405 and 434 mV). N2-NiCoFe-PBA can run stably over 110 h in an alkaline high-salty electrolyte (1 M KOH + 2.0 M NaCl) at 250 mA cm–2. This study provides a modification method without destroying the structure to develop efficient and stable OER catalysts for seawater electrolysis.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2020
·
IF 3.687
Haijun Pan,Yuanyuan Peng,Xinhuan Lu,Jie He,Lin He,Chenlong Wang,Fanfan Yue,Haifu Zhang,Dan Zhou,Qinghua Xia
1,3,5-benzenetricarboxylate (BTC) and 4,4′-bipyridine (BIPY) are employed in the synthesis of dual ligands Ni-MOFs. The magnetic Ni@CN nanocatalyst is prepared by direct pyrolysis of Ni-MOFs in N 2 atmosphere, which exhibited excellent activity in selective hydrogenation of nitrobenzene (NB) to aniline (AN) at 60 °C, 2.0 MPa H 2 . The conversion of NB can reach 99.1 mol%, and the selectivity of AN is over 99 %. A series of characterizations are obtained by XRD, Raman, XPS, SEM, TEM, TPR and TGA. It is found that the synergic effect of Ni species and N contributes to the increase of catalytic activity of the catalyst. Cycling tests proved that the prepared catalyst could be reused ten times without a visible reduction in catalytic activity of hydrogenation. The excellent stability and activity of Ni@CN nanocatalyst could be assigned to the porosity of carbon material doped with nitrogen, derived from dual ligands Ni-MOFs.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
Chemosensors
·
2024
·Vol. 12
·期 6
·104
·
IF 3.7
Yanyan Xing,Pingping He,Deyong Wang,Yuan Liang,Xing Gao,Xiaohong Hou
Colorimetric biosensor-based nanozymes have received considerable attention in various fields thanks to the advantages of the simple preparation, good stability, and regulable catalytic activity of nanozymes. In this study, a bimetallic nanozyme Fe3O4@Co3O4/CN was prepared via the high-temperature calcination of Fe3O4-PVP@ZIF-67. The material retained its skeletal structure before calcination, which prevented the aggregation of nanoparticles and exposed more active sites of the nanozyme, substantially enhancing the intrinsic dual enzyme-mimetic activities, including peroxidase- and oxidase-like activities. In particular, Fe3O4@Co3O4/CN with oxidase-like activity catalyzed the colorless tetramethylbenzidine (TMB) to become blue oxTMB with oxygen. Reducing glutathione (GSH) could inhibit the above oxidation reaction. In contrast, with respect to the existence of mercury(II), GSH bound to mercury(II) due to the strong affinity between mercury(II) and -SH, thus eliminating the inhibition and restoring the oxTMB signal. A simple and effective colorimetric sensor was fabricated to detect mercury(II) based on the above principles. The proposed measurement had a linear range of 0.1–15 μM and a limit of detection (LOD) of 0.017 μM. It was shown that the established colorimetric sensing system could be successfully applied to detect mercury(II) in water samples, and the Fe3O4@Co3O4/CN nanozyme proved to be a promising candidate for biosensing application.
研究领域:
生物传感
·
材料科学
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Xiaoye Wen,Li Yan,Zhefeng Fan
New strategies still need to be proposed that can be used to sense and remove toxic environmental pollutants in a sensing system. In this research, a novel NIR fluorescence sensor 1 was designed and prepared with aggregation induced emission (AIE) property. The fluorescence intensity of the sensor 1 in DMSO/H 2 O mixed solvent was changed along with the proportion of water. The sensor 1 can be successfully used for real-time detection and removal of Hg 2+ in 20% DMSO aqueous solution with high selectivity, quick response and so on. Furthermore it can be efficiently reused and recycled without any loss through Na 2 S. In addition, the sensor 1 displayed high sensitivity and selectivity to cyanide ions in 1% DMSO aqueous solution with the presence of other interference anions. The sensing mechanism for Hg 2+ and cyanide ion was evaluated by 1 H NMR spectra, Mass spectrometry. The sensor 1 exhibited low cytotoxicity for biological applications, which was used as an outstanding fluorescent transducer for detection of cyanide ion in living cells. Based on the visible fluorescence change for the sensor 1 to cyanide ion, the measurement was performed for food materials containing cyanide, such as potato, cassava powder and almond. This research provides perspective potential in solving the problem of other pollution and stimulating new thinking for designing of the novel fluorescence materials.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Dapeng Li,Jianghe Chen,Yang Fu,Linhai Yang
This study synthesized amorphous copper-doped carbon nitride intermediates (Cu/CN-400) via a template-free self-assembly approach using melamine as the precursor, copper sulfate pentahydrate as the copper source, and deionized water as solvent. By controlling thermal polycondensation temperature (400℃ optimal), we regulated intermediate condensation degrees and achieved transformation of copper from ionic to amorphous states. Comprehensive characterization (XRD, FTIR, SEM, TEM, XPS，BET,ICP) revealed the intermediates' morphological and physicochemical properties, enabling proposal of a formation mechanism for amorphous Cu-CN intermediates through template-free self-assembly and thermal condensation. Heterogeneous copper-doped carbon nitride catalysts derived from Cu/CN-400 intermediates demonstrated significantly enhanced Fenton-like catalytic performance, indicating broad application prospects.
研究领域:
材料科学
·
催化
·
纳米技术
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Huirong Chen,Jiamin Li,Zixin Huang,Yi Zhang,Yuee Ruan,Xiaonan Luo,Fengfeng Chen,Ruliang Liu
The increasing demand for sustainable and efficient catalytic processes has driven the development of advanced nanoreactors. In this study, we present a sophisticated Metal–organic framework (MOF)-template-mediated approach to synthesize yolk–shell Co-CN@SiO2 nanoreactors, where Co nanoparticles were supported on carbon nitride (C–N) nanosheets as the core encapsulated within a nanoporous SiO2 shell. This yolk–shell structure with confined cavities can provide a high surface area and overcome challenges such as Co nanoparticle sintering and mass transport limitations, resulting in superior catalytic performance. Remarkably, these nanoreactors achieved a 99% yield of benzyl alcohol from benzaldehyde hydrogenation under base-free conditions. Moreover, the influence of calcination temperatures on the structural evolution of the Co-based silica nanoreactors was explored, revealing the critical role of synergistic interaction between C–N and Co nanoparticles in boosting catalytic activity. Density functional theory calculations were conducted to investigate the adsorption energies of reacting species on the catalyst, providing mechanistic insights into the enhanced hydrogenation activity of the Co-CN@SiO2. This work offers valuable insights into the rational design of advanced nanoreactors for various catalytic applications, particularly in the field of green chemistry and sustainable synthesis.
研究领域:
化学工程
·
绿色化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Chengqi Feng,Anran Li,Yuxin Zhu,Yan Lei,Chenkai Jin,Juncheng Huang,Haining Na,Jin Zhu
Polluted water poses a significant threat to human health and ecological balance, necessitating the development of efficient and cost-effective water purification technologies. This study synthesized a composite photocatalytic material (CMF@Fe x O y -CN) using a microwave radiation synchrotron cooling technique. This material incorporates iron oxide-doped g-C 3 N 4 and in-situ micro-fibrillated cellulose, exhibiting high dispersion stability and magnetic recyclability. The material demonstrates a bandgap energy ( E g ) of 2.69 eV. Remarkably, 25 mg/20 mL of CMF@Fe x O y -CN (with 40 wt% Fe x O y -CN loading) achieved a 97.9 % degradation of Rhodamine B (Rh B) within 1 h. Even after 10 cycles, the degradation efficiency remained high at 89.4 %. The superoxide radical (·O 2 − ) played a critical role in Rh B degradation, facilitated by the stable dispersion of CMF. The issue of low photocatalytic efficiency, often caused by poor dispersion of photocatalysts, was addressed through the in-situ micro-fibrillation of cellulose, offering a green and economical solution. This study provides a theoretical foundation for applying photocatalysis in water purification.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Zewen Fan,Wannan Wang,Jing Ren,Shaofei Zhang,Ruipeng Ren,Yong-Kang Lv
Fe[Fe(CN)6] (FeHCF) is considered a promising material for capacitive deionization–desalination of saline wastewater due to its excellent structure. However, additives are usually introduced during the synthesis of FeHCF in order to avoid [Fe(CN)6]3– vacancy defects filled by ligand water, which can result in the appearance of harmful byproducts and additional water treatment costs. In this study, an additive-free in situ vacancy repair strategy is proposed for the rapid synthesis of high-quality FeHCF in a saturated K3Fe(CN)6 solution. During the process of synthesizing FeHCF in solution, a high concentration of [Fe(CN)6]3– is found to facilitate the binding of Fe3+ to [Fe(CN)6]3– and hinder the hydrolysis and coordination reaction of Fe3+. After undergoing repair, FeHCF4 demonstrates an increased capacity and highly reversible electrochemical performance due to the robust structure. When utilized as Faraday cathodes in hybrid capacitive deionization (HCDI) systems, FeHCF4 exhibits a higher salt removal capacity (65.67 mg g–1) and lower energy consumption (0.68 kWh kg–1-NaCl) compared to unrepaired FeHCF1, while still maintaining excellent cycling performance. This environmentally friendly approach of repairing vacancies serves as a source of inspiration for the advancement of high-performance Prussian Blue analogues as capacitive sodium-removing materials.
研究领域:
材料科学
·
环境工程
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yu Huang,Xinyang Xu,Fengkun Han,Xi Chen,Guangjian Fan
Photocatalytic technology holds promising prospects for remediating naphthalene pollution in water bodies. In this work, the CN/Pt-P25 photocatalyst was successfully prepared via photodeposition combined with co-pyrolysis methods, and employed for naphthalene photodegradation under simulated sunlight. The chemical state of Pt was found to have a significant impact on the photocatalytic activity. H 2 secondary annealing effectively tuned Pt chemical states, increasing the proportion of Pt 0 species on the CN/Pt-P25 photocatalyst from 41.91 % to 62.24 %. The improved proportion of Pt 0 species proportion led to a reduction in the bandgap, which induced changes in the band positions and notably enhancing the separation efficiency of photogenerated electron-hole pairs. Under simulated sunlight irradiation, (H 2 ) CN/Pt-P25 photocatalyst achieved complete naphthalene photodegradation within 100 min. Thus, photocatalysts containing a high proportion of Pt 0 species exhibited an improved performance in naphthalene photodegradation. These findings provide new insights into the application of photocatalytic technology for the remediation of PAHs.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
Zuheng Jin,Xiao Zheng,Zhihong Zhu,Chuan Jiang,Sha Wu,Changzheng Hu,Laijun Liu,Liang Fang,Zhenxiang Cheng
Considering advanced oxidation techniques offer new opportunities for microbial degradation and inactivation, in this study, Z-type heterojunctions of Ba 1.4 Sr 3.6 NdNb 7 Ti 3 O 30 -N 2 /g-C 3 N 4 (BN 2 /CN) were successfully prepared using a solid-phase method and explored for their potential applications in tribocatalytic bactericidal inhibition. These results demonstrate that BN 2 /CN exhibits excellent inhibitory and inactivating effects on E. coli under tribocatalytic conditions. The UV–visible spectrum showed a gradual decrease in the survival rate of E. coli with the increase of tribocatalysis time, reaching an inactivation effect of 91% after 1 h, while fluorescence staining also confirmed that E. coli were essentially eliminated, with hardly any surviving bacteria observed under a laser confocal microscope . Hence, this study presents a novel catalytic approach for sterilization. Moreover, inhibition experiments demonstrated that the BN 2 /CN catalyst did not inhibit the growth of E. coli, tribocatalysis played a crucial role in the disinfection and sterilization processes . The inactivation of bacteria by BN 2 /CN catalyst was still above 90% after multiple cycles of sterilization experiments. Finally, we demonstrated that the production of •OH and •O 2 - during tribocatalysis is key to the inactivation of E. coli, thus achieving the desired effect of tribocatalytic sterilization.
研究领域:
催化
·
材料科学
·
微生物学
·
环境科学
✓ 已验证
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 5
·419
·
IF 4
Longfei Xia,Xilin Wang,Jiahui Li,Dongyan Xu
Mn-based catalysts have been extensively studied in advanced oxidation processes based on peroxymonosulfate (PMS) oxidants, demonstrating their significant potential for treating antibiotic-contaminated wastewater. In this study, an amorphous MnO2-based composite catalyst (MnO2/CN@SiO2) was prepared and used to activate PMS for degrading levofloxacin (LEV). The effects of reaction conditions, such as reaction temperature, catalyst dosage, PMS concentration, and solution pH, on LEV degradation were comprehensively investigated. The interference of water components, e.g.,NO3−,SO42−, Cl−,CO32−, and humic acid, on the degradation efficiency of LEV was analyzed, and the stability of the catalysts was explored by cycling experiments. Finally, radical quenching experiments and electron paramagnetic resonance spectroscopy were employed to elucidate the contribution of active species to the degradation reaction process. A non-radical-based pathway for LEV degradation was proposed based on these results.
研究领域:
环境科学
·
催化化学
·
废水处理
✓ 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）