Journal of Water Process Engineering
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2025
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IF 6.7
Liping Zhang,Huitong Li,Mengnan Duan,Weiwei Wang,Ran Mu,Zehua Pi,Yubin Shang
Coking reverse osmosis concentrates (ROCs) are characterized by a high organic content, complex composition, and difficulty in biological degradation. To achieve the zero liquid discharge (ZLD) strategy, ROCs need to be treated urgently. This work aims to prepare a modified catalyst under high-efficiency activated alumina (γ-Al 2 O 3 ) loaded with Fe and Co bimetals and to degrade m-cresol as a typical pollutant in actual coking ROCs. The results showed that Fe and Co metals were successfully loaded. Meanwhile, the catalyst enhances the reactive active sites, reduces the activation energy of the reaction, and improves the degradation efficiency. The degradation mechanism and removal process were investigated. The results showed that with the optimal conditions, as ozone dosage of 50 mg/L, gas flow rate of 400 mL/min, catalyst dosage of 30 g/L, and pH value of 9, the removal rates of COD, TOC, and UV 254 were 75.61 %, 56.22 %, and 84.14 %, respectively. This study provides a better treatment option for the degradation of m-cresols in coking ROCs.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Weirui Chen,Yixiang Bao,Xukai Li,Jun Huang,Jinxin Xie,Laisheng Li
Heterogeneous catalytic ozonation had met the bottlenecks when treating low concentration but high toxic pollutants: (i) the low mass transfer efficiency of ozone and pollutants to hydrophilic catalyst; (ii) the negative impact of coexisted water matrixes. Herein, to enhance the mass transfer efficiency of reactants toward hydrophilic Fe-MCM-41 as well as enhance the interfacial reaction, the fluoride planting Fe-MCM-41 (F-Fe-MCM-41) was synthesized and employed as catalyst in catalytic ozonation for nitrobenzene (NB). Both NB and TOC removal were promoted in F-Fe-MCM-41/O 3 with 99.0 % NB removal in 60 min and 88.6 % TOC removal in 120 min, which were superior to the degradation efficiency by O 3 and Fe-MCM-41/O 3 . FTIR, EPR, Mössbauer spectra, 29 Si NMR, 19 F NMR et al verified that the replacement of non-reactive silanols (-Si−OH) of Fe-MCM-41 with Si F groups could enhance its hydrophobicity, Lewis acidity and mass transfer effect. Comparative characterizations, experiments and theoretical calculations verified that interfacial reaction played the major role over liquid phase reaction for NB degradation in F-Fe-MCM-41/O 3 . Moreover, the strengthened interfacial reaction also reduced the OH scavenging effect of water matrix, such as humic acid and carbonate. The interfacial adjustment method proposed in this study provided a novel insight into catalyst design and water treatment process.
研究领域:
环境科学
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催化材料
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
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IF 6.3
Jianling Han,Wenxi Zhang,Kuozhou Liu,Huijie Zheng,Yiming Li,Liuxiong Luo,Shen Gong,Yanlin Jia,Xiaopeng Liang
The search for highly efficient, low-priced and well-stabilized bifunctional oxygen catalysts is the current research focus of Zinc Air Batteries (ZABs). In this paper, PtFeCoNiMoY high-entropy alloy (HEA) nanoparticles are successfully coated on carbon nanotubes (CNTs) using a simple one-step gas-phase synthesis. The catalyst exhibits outstanding performance with an OER (oxygen evolution reaction) overpotential of 238 mV (10 mA cm −2 ) and a bifunctional oxygen overpotential (ΔE) of only 0.713 V. In addition, the catalyst shows better performance when used as a cathode for ZABs, with a high specific capacity (797 mA h/g), peak power density (128.4 mA cm −2 ) and long-term cycling stability of more than 80 h. XPS results show that the addition of Mo and Y elements can result in a change in the electronic structure of the alloy. DFT (Density functional theory) calculations point out that the addition of Mo elements makes the alloy’s upper-spin state electrons more continuous near the Fermi energy level. The addition of Y elements shifts the overall d-band center of the alloy downward, which serves to regulate the surface adsorption energy. The work in this paper will promote the study of Pt-based bifunctional electrocatalysts and their practical application in ZABs.
研究领域:
材料科学
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电化学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Shahzad Afzal,Xie Quan,Sen Lu
Ceria based catalysts have been widely applied in ozonation of organic pollutants in wastewater treatment. Ceria with different exposed facets have not been used in catalytic ozonation. In this study, ceria nanorods (R-CeO 2 ), nanocubes (C-CeO 2 ) and nanooctahedra (O-CeO 2 ) with different exposed facets (110) + (100), (100) and (111)) respectively were used in catalytic ozonation of p-nitrophenol. Two calcination temperatures 300 and 500 °C were selected for comparative catalytic activity. Ceria nanoparticles (NP-CeO 2 ) were also prepared for comparative catalytic activity. Approximately 86%, 71%, 68%, 64%, 60% and 40% TOC was removed by ozonation catalyzed by R300-CeO 2 , C300-CeO 2 , CeO 2 -NP, O300-CeO 2 , R500-CeO 2 and ozonation alone respectively. Nanorod calcined at 500 °C (R500-CeO 2 ) showed lower catalytic activity as compared to R300-CeO 2 . O 3 was also rapidly decomposed by R300-CeO 2 as compared to other catalysts and single ozonation. Inorganic hydroxyl radical scavengers and several characterization techniques were applied for investigating the underlying mechanism of catalytic ozonation. Hydroxyl radicals, surface peroxide and surface atomic oxygen as reactive oxygen species were generated for enhancing the catalytic activity. Furthermore, irrespective of surface area, the difference in catalytic activity of ceria nanoshapes were assigned to the differences in the abundance of surface basic sites, defects densities/oxygen vacancies (OVs) and coordination number of surface atoms. This study provides an insight to use other metals with variety of exposed facets for catalytic ozonation.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Jing-Rui Zhang,Fa-Qiang Zhong,Lu-Bing Zhong,Zheng-Jun Dong,Quan-Bao Zhao,Zhimin Ao,Darren Delai Sun,Jia-Cheng E. Yang,Yu-Ming Zheng
An unprecedented type of 3D porous millimetric ozonation catalyst confining Mn-Ce dual-atom sites in terracotta support (MCT) was hereby reported through a feasible interface oxygen-induced ordering strategy. The utilization of cerium tailored the electron/valence state of dual-atom sites through its oxyphilic 4 f orbitals, making MCT present excellent ozone catalysis to remove model recalcitrant fulvic-like acids. The TOC removal kinetics value by MCT is 2.71 and 3.68 times higher than those of catalysts confining single Mn and Ce sites, respectively. The optimized MCT exhibited robust reusability without any regeneration (above 87% of TOC removal for each cycle), and desirable removal for the biochemical effluent organics of landfill leachate, showcasing a potential of deeply purifying saline wastewater. The electron complementary effect of cerium in dual-atom sites accelerated the electron transfer for O 3 catalysis, thus promoting the formation of reactive radicals for pollutant degradation via a thermodynamically feasible surface-adsorbed oxygen pathway. This work highlights the importance of elaborately designing dual-atom metal sites to construct reusable monolithic ozonation catalysts with electron self-cycle function for advanced wastewater purification.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Green Energy & Environment
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2022
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IF 12.781
Muhammad Faizan,Yingwei Li,Xingsheng Wang,Piao Song,Ruirui Zhang,Ruixia Liu
Deep eutectic solvents (DESs) are now considered a new class of ionic liquid analogs that have been generously used in various fields. Herein, vanadium phosphorus oxide (VPO) catalysts are synthesized in combination with a deep eutectic solvent containing rare earth metal (rE-DES), and their catalytic performance in n-butane selective oxidation to produce maleic anhydride (MA) is evaluated. The rE-DES is produced from the interaction of choline chloride (ChCl) and rare earth metal salts (Cerium, Europium, Lanthanum, and Samarium metal salt) (ChCl:rE = 1:0.5–1:3) under mild conditions. It was found that DESs served as structural modifiers and electronic promoters during VPO synthesis. It regulated the chemical state of the catalyst surface, such as the vanadium valence state, acid-base properties, and ratios of V 4+ /V 5+ , Lat–O/Sur–O and P/V. Various characterization techniques, such as FT-IR, DSC, XRD, SEM, EDS, TEM, Raman, TGA, NH 3 -TPD, and XPS, were used to examine its physical and chemical characteristics. These characteristics were correlated with the catalytic performance. The VPO catalyst modified by rE-DES showed a significant enhancement of n-butane conversion and MA selectivity while suppressing the selectivity of CO and CO 2 as well as the CO/CO 2 ratio compared to the unpromoted VPO catalyst. Especially for Ce-DES-VPO, it increased the n-butane conversion and MA mass yield up to approximately 11% and 10%, respectively. In addition, we evaluated the catalytic performance under different activation atmospheres.
研究领域:
化学工程
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催化材料
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Tong Ding,Wenxiao Zhao,Yuqing Sun,Shilong Li,Tianxiang Yu,Wenheng Jing
In this work, a novel 2D Fe 3 O 4 -MnO 2 hollow fiber ceramic membrane (HFCM) with both excellent separation performance and high catalytic activity was constructed. The Fe 3 O 4 nanoparticles were deposited on 2D MnO 2 nanoplates to increase the Mn 3+ content, and then the nanoplates were pressure-driven and sintered on the surface of the hollow fiber ceramic supports to obtain 2D Fe 3 O 4 -MnO 2 -HFCMs. Electron spin resonance analysis confirmed that hydroxyl radicals and superoxide radicals played a major role in oxidative degradation and tetracycline hydrochloride (TCH) removal was 86.9 %. Noteworthily, TCH was concentrated on the membrane interface due to the concentration polarization effect, which increases the probability of binding free radicals from the catalytic membrane layer, thus enhancing the catalytic performance and the anti-fouling capability of the membrane. The 2D Fe 3 O 4 -MnO 2 -HFCM can be applied in wastewater treatment due to its superior catalytic ozonation activity and high separation performance.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Enliang Zhang,Peng Zhao,Guogang Xu,Fanpeng Meng,Xinzhen Wang,Yuanhui Gao,Lulu Liu,Shaowei Jin
In recent years, micropollutants contamination in aquatic environments has received increasing attention. Bisphenol A (BPA), an endocrine-disrupting compound, has emerged as a substantial threat to water safety owing to its widespread presence in various aquatic environments. To address this issue, this study focused on the development of ceramic membranes incorporating manganese-cobalt oxides (MCOs) to catalyze the ozone-based degradation of BPA. The catalytic layer was prepared by hydrothermal in-situ growth method, which enhanced BPA degradation during water treatment and improved the ceramic membrane’s resistance to contamination. Moreover this study investigated the synergistic effect of catalytic ozone oxidation in mitigating ceramic membrane pollution and degrading micropollutants. The catalytic mechanism and the contamination modeling were examined systematically to determine the mechanism of micropollutant contamination on ceramic membranes. The experimental results showed that the modified ceramic membrane exhibited a higher BPA removal efficiency (90.6%) and flux recovery (99.5%) than the unmodified membrane (64.2% and 79%, respectively). Furthermore, the MCOs-modified ceramic membrane (CCM) effectively enhanced the generation of hydroxyl radicals during ozonolysis. This enhancement resulted in better degradation of organic pollutants in water, thus improving the quality of the treated water. The combination of ceramic membrane catalytic separation with ozone oxidation technology offers a potential solution for the degradation of emerging pollutants and the mitigation of ceramic membrane pollution.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
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2022
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IF 4.11
Xiaoxian Zhang,Bin Zhou,Shujuan Yin,Yishan Wang,Xueqian Zhang,Qingduo Meng,Fanpeng Meng,Chuncheng Wei,Guangwu Wen
In the present study, mesoporous manganese dioxide catalysts with large high specific surface area, pore volume and large pore size structure were synthesised using the nano-casting method with a mesoporous structure of silica SBA-15 as a hard template. Therefore, the physical and chemical properties of mesoporous MnO 2 were characterised by XRD , FT-IR, Raman, UV–Vis, N 2 adsorption-desorption, SEM, EDS , TEM, TG and XPS. In this study, the oxidative reactivity of MnO 2 corresponding to methyl orange (MO) and oxalic acid (OA) was assessed. MnO 2 was found to contain the most abundant oxygen vacancies and easily reducible surface adsorbed oxygen (O latt ), which facilitates the catalytic utilisation of ozone. As a result, the highest catalytic performance was achieved for methyl orange and oxalic acid, with degradation efficiencies of 98.37% and 92.96%. This present study deepens our understanding of manganese dioxide catalyzed ozone and provides a reference for improving process efficiency.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2024
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IF 9.7
Jiaqun Zou,Bingen Yuan,Chuanxi Zhao,Jianxin Wang,Haoqi Qiu,Jiaxin Dang,Qin Wang,He Miao,Jinliang Yuan
Cobalt (Co) is widely used in energy storage and conversion devices, although its content on our planet is not adequate. Therefore, recycling Co from the spent Co-enriched materials is indispensable. Co-based perovskites , which contain abundant Co, are extensively utilized in solid oxide fuel cells, three-way catalysts, and oxygen-permeable membranes, and the recovery of Co from the spent Co-based perovskites is necessary to meet the long-term requirement of Co. In this work, a facile and universal thermal reduction method (750 °C and N 2 atmosphere) is employed to convert the spent cobalt-based perovskites into high-performance bifunctional oxygen catalysts for zinc-air batteries (ZABs), achieving high-efficient Co recovery and re-utilization. At high temperatures, melamine and dopamine hydrochloride are transformed into carbon nanotubes , C 3 N 4 and reducing gases (such as NH 3 and H 2 ). Simultaneously, the metal elements in the spent Co-based perovskites (SrNb 0.1 Co 0.7 Fe 0.2 O 3 ,SNCF) are converted into nano-scale alloy particles and metal nitrides . Then, the phase structures, micromorphology, and element valences of the obtained multiphase oxygen catalyst (SNCF–Ni-PM) are characterized by X-ray diffraction, scanning/transmission electron microscopy, and X-ray photoelectron spectroscopy, respectively. The electrochemical properties , including oxygen catalytic activities and stability, of SNCF-Ni-PM are measured by linear sweep voltammetry , chronopotentiometry, chronoamperometry, and cyclic voltammetry methods. Considering the practical applications, the aqueous and solid-state ZABs are assembled and measured. The results demonstrate that the multiphase SNCF-Ni-PM mainly includes carbon nanotubes, C 3 N 4 nanosheets , and FeNiN or CoFe nanoparticles . Moreover, SNCF-Ni-PM exhibits excellent bifunctional oxygen catalytic activity, with an oxygen evolution reaction (OER) potential at 10 mA cm −2 of 1.51 V and an oxygen reduction reaction (ORR) half-wave potential of 0.77 V, outperforming most of the reported oxygen catalysts. Using SNCF-Ni-PM, the aqueous and solid-state ZABs can achieve high power densities of 295.9 and 228.4 mW cm −2 , respectively, being superior to most ZABs. In addition, the aqueous ZAB with SNCF-Ni-PM can operate stably for 300 h with a slight degradation. This work provides a feasible method for effectively recycling Co from the spent Co-based perovskites.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Shiqing Li,Yuanchen Duan,Yu Zhou,Huiwen Yang,Yang Zhang,Qin Wang,Jianxin Wang,Beibei Han,Liangzhu Zhu,Jun Yang,Wanbing Guan,Anqi Wu
In this study, the Cu 0.5 Ni 0.5 MnCoO 4 (CNMC) material was developed for use in the cathode of solid oxide fuel cells (SOFC). X-ray diffraction (XRD) confirmed the spinel structure and demonstrated compatibility with Yttria-stabilized zirconia (YSZ) electrolyte at elevated temperatures. The conductivity of CNMC was found to be between 28 and 55 S cm −1 at temperatures ranging from 700 to 900 °C. Oxygen-temperature programmed desorption (O 2 -TPD) revealed that CNMC powder possesses effective oxygen catalytic characteristics. To enhance performance, CNMC was combined with Gd 0.1 Ce 0.9 O 2-δ (GDC, H2-bank Co. Ltd.) in a mass ratio of 3:7 (CG37). The thermal expansion coefficient (TEC) of this composite was measured at 12.8 × 10 −6 K −1 , closely matching that of YSZ and avoiding the issue of strontium segregation, eliminating the need for a barrier layer between the electrolyte and the cathode. The peak power densities of CG37 reached 1175 mW cm −2 and 905 mW cm −2 at 800 °C and 750 °C, respectively. CG37 underwent testing for 1000 h under constant-current discharge at 600 mA cm −2 and 750 °C, showing a voltage degradation rate of 2.5 %/kh. The cell's microstructure remained intact without any signs of elemental diffusion or segregation, indicating excellent chemical compatibility and stable structural integrity. This research is expected to further advance the study and utilization of novel solid oxide fuel cells.
研究领域:
材料科学
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能源工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Qiusheng Zhou,Minmin Song,Yuan Tian,Min Min,Shiqiang Cui,Xianying He,Chuanyin Xiong
The large-scale application of metal-air batteries strongly depends on the development of cost-effective, highly efficient, and durable bifunctional oxygen catalysts. In this work, a facile approach for preparing the monodisperse PtCo nanoalloy anchored the nitrogen-doped carbon nanotubes (PtCo/NCNT) for zinc-air batteries is reported. The nitrogen-doped carbon shell prevents PtCo nanoalloy from exfoliation, dissolution, and aggregation and enables the accessibility of electrolytes to the alloy surface and the electron transfer. Besides, the strong interaction between PtCo nanoalloy and nitrogen-doped carbon can efficiently modulate the electronic structure of the formed active sites. When used as a cathode catalyst, the constructed rechargeable zinc-air battery presents higher power density (268 mW cm −2 ), specific capacity (840 mAh g −1 ), and excellent stability. More importantly, the PtCo/NCNT catalyst allows the all-solid-state cell to exhibit remarkable flexibility and high round-trip efficiency at various bending states, demonstrating a potential possibility to replace the conventional Pt/C and RuO 2 catalysts.
研究领域:
材料科学
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电化学
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能源存储与转换
✓ 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）