PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Haifeng Jiang,Meng Song,Yuhang Li,Wei Jia,Jiahao Qi
Catalytic pyrolysis of waste plastics under nitrogen-rich conditions to produce nitrogenous compounds represents a highly promising technological approach. It can achieve high-value conversion of waste plastics and expand the synthesis process of nitrogenous products. This work uses polyethylene terephthalate (PET) as the raw material and urea as the nitrogen source to produce aromatic amines, and prepares Zn/CuCo 2 O 4 spinel catalysts to enhance the above synthesis process. The results indicate that the optimal mass ratio of PET and urea is 1:1, where the relative content of nitrogenous compounds in the liquid product reaches 86.69 %, and the selectivity of aromatic amines reaches 52.48 %. The addition of the spinel catalyst significantly improves the selectivity of aromatic amines. Compared with the CuCo 2 O 4 catalyst, ZnCo 2 O 4 exhibits superior catalytic conversion performance. The optimal addition ratio of the ZnCo 2 O 4 catalyst is 15 %, and the optimal pyrolysis temperature is 550 ℃. Under these conditions, the selectivity of aromatic amines increases by 11.11 % compared to non-catalytic pyrolysis. In addition, the obtained solid residue containing the used catalyst is considered as a potential adsorbent and can be applied in water treatment. It has significant removal ability for methylene blue dye. This work not only provides a feasible approach for the production of aromatic amines, but also provides important support for the high-value utilization of waste plastics.
研究领域:
化学工程
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环境科学
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催化材料
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产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2020
·
IF 4.142
Jian-Rong Li,Feng-Kang Wang,Chi He,Cenyan Huang,Hang Xiao
A series of carbon-supported Cu Co oxide catalysts (Cu-Co/C) were prepared via the combination methods of impregnation and pyrolysis using Co-doped Cu-based metal organic framework (Cu 3 (BTC) 2 ·3H 2 O, Cu-BTC) precursor. Physicochemical properties of prepared catalysts were characterized by using various technologies and toluene was chosen as the probe molecule to evaluate their catalytic performance. Results revealed that the successive calcination in Ar and air was conducive to the formation of 3D porous carbon matrix and homogeneous elemental dispersion. The Cu-Co/C catalysts with spinel structure exhibited higher catalytic activity than that of Cu-500/C material. Moreover, CuCo 0.5 /C material exhibited superior catalytic durability and water resistance in catalytic oxidation of toluene. The excellent catalytic performance of CuCo 0.5 /C was mainly related to large specific surface area, high amounts of surface chemisorbed active oxygen and high ratio of Co 2+ /Co 3+ .
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
AICHE JOURNAL
·
2024
·
IF 3.5
Yanru Zhu,Zhen Zhang,Yunfei Zou,Jian Zhang,Zhe An,Xin Shu,Hongyan Song,Jing He
Catalytic conversion of biomass-derived 5-(hydroxymethyl)furfural (5-HMF) into carbon-increased hydrocarbons as drop-in energy-rich biofuels has received a great deal of concern for the development of sustainable chemical industry. Here, we demonstrate a one-pot conversion of 5-HMF into C 9 -alkanes on one single catalyst, acidic–basic layered double oxides (Mg(Al)(Zr)O) supported CuCo alloy. The well-defined multifunctional catalytic sites with harmonious combination carry out cascade catalysis, affording C 9 -alkanes (including 30% of more value-added branched-cycloalkanes) in 83% yield. The basic–acidic sites on Mg(Al)(Zr)O show high activity for aldol condensation of 5-HMF and acetone, producing 4-[5-(hydroxymethyl)-2-furanyl]-3-buten-2-one (HAc) in a yield of >99%. The engineered Co–Cu–Co linkages on supported CuCo perform efficient hydrodeoxygenation, affording C 9 -alkanes in a selectivity of 96% from HAc. C 9 -cycloalkanes are generated from the cyclization of the corresponding monohydric alcohol intermediates by the synergy of acidic and CuCo sites in the hydrodeoxygenation reaction.
研究领域:
化学工程
·
催化
·
可再生能源
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生物质转化
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Angjian Wu,Yimeng Zhou,Jiabao Lv,Delong Zhang,Yaqi Peng,Qiulin Ye,Pengcheng Fu,Weitao Wang,Xiaoqing Lin,Shaojun Liu,Mengxia Xu,Zhifu Qi,Songqiang Zhu,Wei Zhu,Jianhua Yan,Xin Tu,Xiaodong Li
Electrocatalytic conversion of widely distributed nitrate from industrial wastewater into value-added ammonia was proposed as an attractive and sustainable alternative to harvesting green ammonia. Herein, CuCo alloys were facilely synthesized for nitrate conversion, while nonthermal Ar-plasma was employed to enhance the adhesion strength between the electrocatalyst and substrate interface via regulating the surface hydrophobicity and roughness. Based on Ar-plasma treatment, a high ammonia yield rate (5129.29 μg cm–2 h–1) was achieved using Cu30Co70 electrocatalyst −0.47 V vs RHE, while nearly 100% of Faradaic efficiency was achieved using Cu50Co50 electrocatalyst at −0.27 V vs RHE (reversible hydrogen electrode). Validated by in situ spectroscopy and density functional theory calculations, the high activity of the CuCo alloy was derived from the regulation of Co to weaken the strong adsorption capacity of Cu and the shift of the d-band center to lower the energy barrier, while Ar-plasma modification promoted the formation of *NO to boost nitrate conversion.
研究领域:
电化学
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材料科学
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环境科学
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催化
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Yueying Yu,Hongli Zhao,Kaicha Chen,Shida Cao,Minbo Lan
When an acute myocardial infarction (AMI) occurs, myoglobin (Mb) is the biomarker whose concentration firstly increases, and the high sensitive detection of Mb is critical for early diagnosis of AMI. Herein, a sandwich-type electrochemical aptasensor for the sensitive detection of Mb was constructed by using Pt@Cu 1.33 OCo 0.83 O as the signal marker. On one hand, nano-flower-like Cu 1.33 OCo 0.83 O was synthesized by hydrothermal method and Pt nanoparticles (Pt NPs) were loaded on its surface. Pt@Cu 1.33 OCo 0.83 O could immobilize aptamer 2 (Apt2) successfully by the Pt–S bond. And because of the synergistic effect between Pt and bimetallic oxide, Pt@Cu 1.33 OCo 0.83 O had an excellent catalytic effect on the signal source of hydrogen peroxide (H 2 O 2 ) to amplify the current signal, which enhance the sensitivity of the aptasensor. On the other hand, the screen-printed gold electrode (SPGE) was used as the sensing base, which had good conductivity and ensured the immobilization of aptamer 1 (Apt1). The quantitative detection of Mb was achieved by specific recognition between Mb and Apt1, Apt2. As a result, the constructed electrochemical aptasensor had a good linear range (1–1500 ng/mL) with a low detection limit (LOD) of 0.128 ng/mL (S/N = 3), and a high sensitivity of 29.47 μA dec −1 . The aptasensor also realized the detection of Mb in human serum samples with good accuracy, and the results were consistent with the hospital's biochemical indicators, which demonstrated the potential application of the prepared sensor in the clinical detection of Mb.
研究领域:
生物医学工程
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分析化学
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临床诊断
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Qingqing Shi,Yaqi Hou,Qiting Zhu,Yongmei Hao
Due to the complex structure of metal–carbon-based catalysts derived from metal-organic frameworks (MOFs), it is difficult to clarify the active sites and catalytic mechanisms. Constructing of structure–activity relationship is conducive for identifying active center, but there is still a gap in the bimetal-carbon-based catalysts/PMS systems. Here, we report a highly efficient and stable CuCo bimetal-nitrogen doped carbon catalyst (CuCo@C-N) for the activation of PMS for efficient degradation of PNP. By manipulating the catalyst structure, establishing the structure–activity relationship and combining with DFT calculation, the non-metallic active centers were determined, including defects, C=O and graphite N. Co was the only metal active center, and the presence of Cu accelerated the redox cycle of the system. The degradation of PNP was dependent on electron transfer and ROS activation. The metal active center was used to generate sulfate radicals (SO 4 •− ), and the non-metal active sites accelerated electron transfer and non-radical pathways to generate 1 O 2 .
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xizi Wu,Zhixiang Zhai,Jia Wu,Kexin Tan,Zhili Li,Shibin Yin
5-Hydroxymethylfurfural electrooxidation reaction (HMFOR) has attracted increasing attention due to energy conservation and value-added production. It is crucial to design highly active catalysts with fast kinetics and reveal the catalytic mechanism. Herein, the activation of hydroxymethyl/aldehyde groups is tuned on V 2 O 3 -modificated CuCo for efficient HMFOR. Experimental and theoretical results reveal that strong electron transfer occurs on the heterointerface between V 2 O 3 and CuCo, endowing its unique electronic structure and conductivity. Meanwhile, CuCo-V 2 O 3 heterostructure facilitates the modulation of local electron density, charge transfer, and adsorption behavior to promote the activation of hydroxymethyl/aldehyde groups. The higher activation of hydroxymethyl groups than that of aldehyde groups over CuCo-V 2 O 3 induces an altered rate-determining step for HMFOR. Consequently, CuCo-V 2 O 3 presents enhanced HMFOR activity (E 10 , 1.27 V RHE ), reaction kinetics (38 mV dec −1 ), 2,5-furandicarboxylic acid selectivity (99.1%), and stability (40 successive cycles). This work provides a strategy for designing highly active catalysts for synthesizing value-added products.
研究领域:
电化学
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催化
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材料科学
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能源转化
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2019
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IF 4.507
Junmei Liang,Zhenyi Zhang,Kejing Wu,Yanchun Shi,Weihua Pu,Mingde Yang,Yulong Wu
In this study, a novel carbon nanotube (CNT)-supported CuCo catalyst was successfully synthesized by wet impregnation. Experimental and theoretical results on catalytic deoxygenation of stearic acid , a model compound of microalgal bio-oil, revealed that the CuCo catalyst can effectively inhibit cracking reactions and promote production of diesel-like hydrocarbons. CuCo particles in the pores of CNTs were conducive to conversion of stearic acid to long-chain alkanes, featuring a high selectivity of 94.82% at 100% conversion. CuCo catalyst in oxidation state underwent fast in-situ reduction at the beginning of deoxygenation reaction, and its catalytic performance was comparable to that of reduced CuCo catalyst. The improved catalytic conversion of stearic acid to diesel-like hydrocarbons can be achieved at a high ratio of Cu 0 /(Cu + +Cu 0 ) and lattice Co atoms. In addition, the reduced H 2 pressure and amounts of catalysts show potential for large-scale industrial applications.
研究领域:
化学工程
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催化
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可再生能源
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Bolong Jiang,Yuhan Zhang,Nan Jiang,Jiayou Li,Yanguang Chen
Designing a low-cost, high-performance oxygen reduction reaction (ORR) catalyst to replace the precious metal catalyst remains a huge challenge for microbial fuel cells (MFCs). Herein, a facile and rapid approach to fabricate highly active N-doped hierarchical porous carbon (NHPC) supported bimetal CuCo/NHPC composites with densely accessible active sites is developed by pyrolysis of Cu-doped ZIF-67 (CuCo-ZIF) precursor. In which, CuCo-ZIF precursor is synthesized through a one-pot hydrothermal method . Results showed that in addition to create additional Cu-N x sites and increase N content, the Cu doping induces a hierarchical porous structure CuCo/NHPC composite with pores centered around 2.4, 4.2 nm and 10–60 nm, which can significantly accelerate the mass/electron transfer and improve efficient utilization of the active sites. The resulting CuCo/NHPC composite provides abundant active sites, high content of pyridinic-N and graphitic-N, which significantly boosts ORR performances. The CuCo/NHPC-T with pyrolysis temperature of 800 °C achieves remarkable ORR activity with low charge transfer resistances, high half-wave potential. The MFC assembled with CuCo/NHPC-800 (774.2 mW·m −2 and 0.713 V) significantly outperforms MFC assembled with Co-NC-800 (541.9 mW·m −2 and 0.583 V) in terms of maximum power density and open-circuit voltage. Moreover, the output voltage of MFC assembled with CuCo/NHPC-800 exhibited no significant downward trend within 30 days, which was better than that of Pt/C catalyst. This work provides a feasible time-saving route to develop promising nitrogen-enriched mesoporous carbon bimetallic ORR catalysts.
研究领域:
材料科学
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能源科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2022
·Vol. 9
·期 16
·e202200585
·
IF 4.782
Xiaoyang Dong,Jinxing Wang,Xiao Wang,Junyao Xu,Jingdong Yang,Wen Zeng,Yuanhao Li,Yanfei Zhao,Guangsheng Huang,Jingfeng Wang,Fusheng Pan
Graphical Bimetallic nanoparticles : CuCo@N/C-800 displayed superior ORR performances and outstanding stability in alkaline and neutral electrolytes. The primary Mg-air battery assembled the CuCo@N/C-800 as the cathode catalyst displayed better discharge performances than that of Co@N/C-800. This work provided an effective strategy to synthesize bimetallic and non-noble ORR catalysts for Mg-air batteries. Mg-air batteries are regarded as one of the most promising electrochemical energy storage and conversion devices. Developing high-performance, low-cost and durable non-noble metal electrocatalysts for oxygen reduction reaction (ORR) at cathode is extremely critical for promoting the practical applications of Mg-air batteries. The bimetallic M−N−C catalysts possess the superior ORR activity and stability due to the synergetic effect of metal atoms. Herein, prussian blue analogues (PBA) were employed as precursors to prepare bimetallic M−N−C electrocatalysts. The CuCo@N/C and Co@N/C were derived from CuCo−PBA and CoCo−PBA calcined under different temperatures. The bimetallic CuCo@N/C nanoparticles pyrolyzed at 800 °C (CuCo@N/C-800) displays superior ORR performances and outstanding stability in alkaline and neutral electrolytes. The primary Mg-air batteries assembled with the CuCo@N/C-800 as the cathode catalyst displays better discharge performances than that of Co@N/C-800. This work provides an effective strategy to synthesize bimetallic and non-noble ORR catalysts for Mg-air batteries.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2024
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IF 3.9
Yang Xu,Jinghuan Chen,Zhiping Ye,Jiade Wang
The investigation into the development of an active transition-metal oxide catalyst with controllable morphology for the degradation of volatile organic compounds (VOCs) is a subject of considerable importance and warrants further exploration. In this study, ZIF-67 was prepared and employed as a sacrificial template, with varying quantities of Cu ions incorporated to synthesize layered copper-cobalt double oxide (CuCo-LDO) featuring a modifiable surface state. A comprehensive characterization of the CuCo-LDO catalysts was conducted, encompassing structural properties, morphology, surface chemical state, and redox properties, utilizing a range of analytical techniques. Subsequent evaluations included testing the catalytic activity for toluene oxidation and assessing stability performance. The results revealed that differing Cu contents played a pivotal role in inducing changes in the morphology and structure of CuCo-LDO, thereby significantly influencing its oxidation activity towards toluene. Notably, the flower-like structure of 3CuCo-LDO (Cu% = 20.14 wt.%) exhibited outstanding toluene oxidation activity attributable to its unique structure and composition. This research contributes novel insights to the design of highs-performance catalysts targeting volatile organic compounds.
研究领域:
材料化学
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环境催化
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纳米材料科学
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大气污染控制
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表面化学
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Shuo Wang,Mengting Liu,Yarao Gao,Hongyao Zhao,Hongyang Zhu,Rongrong Du,Yuyang Zheng,Zengjing Guo,Yanyun Wang,Yiyan Song,Fu Yang
Graphical In this study, a bimetallic hollow nanoreactor (Co@SiO 2 /Cu−X) was designed for the efficient degradation of antibiotics in medical wastewater. This nanoreactor is composed of ultrafine Cu and Co metal species in a mesoporous N-doped C-Silica heteroshell, and the synergistic interaction between the different metal species and the structural properties of the nanoreactor make the catalyst afford remarkable catalytic activity and excellent recovery stability during norfloxacin mineralization. Moreover, the photothermal properties of the nanoreactor enable it to exhibit excellent performance in solar-driven water evaporation, providing a dual strategy for wastewater remediation and clean water regeneration. In the face of complex water pollution challenges, this innovative design provides a promising solution for advanced water purification technologies. Growing attention has been paid to the rational treatment of antibiotics-bearing medical wastewater. However, the complexity of polluted wastewater makes the later comprehensive treatment difficult only by the Advanced Oxidation Process technique. Therefore, the coupled water treatment techniques including contaminant mineralization and regeneration of cleanwater become very attractive. A bimetallic functional hollow nanoreactor defined as (Co@SiO 2 /Cu−X) was successfully constructed by coating a Cu-doped silica layer on the metal-organic framework (ZIF-67) followed by programmed calcination in nitrogen. The nanoreactor was endowed with a hollow configuration composed of mesoporous N-doping C-Silica hybrid shell encapsulated ultrafine Cu and Co metallic species. Such a configuration allows for the efficient diffusion and open reaction space of big contaminant molecules. The catalytic synergy of exposed Co−Cu bimetals and the easy accessibility of electron-rich contaminants by polar N doping sites triggered surface affinity make the optimal Co@SiO 2 /Cu-6 afford an excellent catalytic norfloxacin mineralization activity (7 min, k abs =0.744 min −1 ) compared to Cu-free Co@SiO 2 -6 (k abs =0.493 min −1 ) and Co-6 (k abs =0.378 min −1 ) Benefiting from the above unique advantages, Co@SiO 2 /Cu-6 show excellent removal performance in degrading different pollutants (carbamazepine, oxytetracycline, tetracycline, and bisphenol A) and persistent recycled stability in removing NFX. In addition, by virtue of the excellent photothermal properties, interfacial solar water evaporation application by Co@SiO 2 /Cu-6 was further explored to reach the regeneration of cleanwater (1.595 kg m −2 h −1 , 97.51 %). The integration of pollutant mineralization and solar water evaporation by creating the monolith evaporation by anchoring the Co@SiO 2 /Cu-6 onto the tailored melamine sponge allows the regeneration of cleanwater (1.6 kg⋅m −2 ⋅h −1 ) and synchronous pollutant removal (NFX, 95 %, 60 min), which provides potential possibility the treatment of complicated wastewater.
研究领域:
环境科学
·
纳米技术
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材料科学
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水处理
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化学工程
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可持续能源
✓ 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）