JOURNAL OF CATALYSIS
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2021
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IF 7.92
Xiaohui Yu,Lingyun Dai,Jiguang Deng,Yuxi Liu,Lin Jing,Xing Zhang,Xiyun Jiang,Zhiquan Hou,Jia Wang,Hongxing Dai
SnO 2 is widely used in catalysis owing to its oxygen vacancies, reducible oxygen species, and acidity. In this work, Ru nanoparticles (NPs) supported on three-dimensionally ordered macroporous (3DOM) SnO 2 ( x Ru/3DOM SnO 2 , Ru loading ( x ) = 0.09–1.65 wt%) were fabricated via the polyvinyl alcohol-protected reduction routes, and their catalytic activities were determined for trichloroethylene (TCE) and/or toluene oxidation. It was shown that the 0.98Ru/3DOM SnO 2 sample exhibited the best activity and good thermal stability, with the temperature ( T 90% ) and apparent activation energy at a TCE (1000 ppmv) conversion of 90% being 300 °C and 44 kJ/mol at space velocity = 40,000 mL/(g h), respectively. Trichloromethane, carbon tetrachloride, tetrachloroethylene, and trichloroacetaldehyde hydrate were the main intermediates in TCE oxidation. The high catalytic performance of 0.98Ru/3DOM SnO 2 was attributed to the presence of hydroxyl groups adsorbed at the oxygen vacancies, strong O 2 adsorption ability, good low-temperature reducibility, and strong interaction between Ru NPs and 3DOM SnO 2 . In addition, a catalytic mechanism over x Ru/3DOM SnO 2 was proposed under dry and humid conditions. The introduction of H 2 O could block some of the reaction pathways from inhibiting the production of C 2 Cl 4 , reduce formation of some by-products (e.g., CH 2 Cl 2 , CH 3 COOH, and C 2 H 2 Cl 2 ), promote removal of the chlorine species, and generate a greater amount of HCl and a smaller amount of Cl 2 . Furthermore, introducing toluene into the TCE stream could generate smaller amounts of organic chlorine by-products and greater amounts of inorganic chlorine products (HCl and Cl 2 ). We are sure that this work can provide a guideline for the industrial application of supported Ru catalysts in the removal of Cl-containing volatile organic compounds.
研究领域:
环境科学
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催化化学
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DOI
高影响因子
Advanced Materials Interfaces
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2022
·Vol. 9
·期 9
·2102474
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IF 6.389
Yu Dong,Yueheng Qi,Wenqing Zhao,Shaohui Yuan,Zihao Zeng,Yue Yang,Wei Sun,Peng Ge
As potential candidates, metal sulfides display strong storage abilities but suffer from serious volume swelling and polysulfide shuttling. Especially rich-sulfur materials, inferior reversible conversion reactions (from MS 2 to MS with S) can bring about major formation of sulfur. Herein, cubic-like Sn–Co–S materials with SnO 2 as catalyst are designed with various dimensional carbon. The as-resulted samples display uniform distributed particle size (≈5 µm), while cross-linked Sn–Co–S@carbon is successfully formed due to its rich surficial groups. Significantly, the formation of chemical bonds about Sn/Co–S–C is noted, facilitating ions/e-transfering and architecture enhancing. Meanwhile, owing to the endothermic effect of carbon, SnO 2 finally resulted, effectively limiting the so-called “shuttling effect” of polysulfide. Utilized as sodium-ion anodes, the optimized samples can deliver a capacity of 490 mAh g −1 at 0.5 A g −1 and ≈400 mAh g −1 above at 5.0 A g −1 . Assisted by the detailed kinetic analysis, it can be confirmed that the improvements of surface-controlling behaviors mainly come from the interfacial chemical bonds and strong-polar metal-oxides bonds. This work is expected to illustrate the roles of interfacial design and metal oxide catalysts for advanced energy storage materials.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
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2023
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IF 2.8
Yuwei Zhang,Hengxi Zhu,Junjiang Guo,Weizhen Liu,Jiang Qi,Guan Qingqing,Bin Li,Ping Ning
In response to the social goal of ‘carbon peak and carbon neutral’ in the 14th Five-Year Plan of China, this article used Enrofloxacin (ENR), a common antibiotic, as a model compound to study the method of efficiently degrading pharmaceutical sludge and simultaneously producing Formic Acid (FA), hydrogen storage energy, in a sub-supercritical system. The Ni/SnO2 bimetallic catalyst, which was prepared by the equal volume impregnation method, was used for the liquid phase catalysis. As shown by the results, when the reaction temperature was 330°C, and the addition amount of H2O2 was 0.38 mL, the degradation rate of antibiotics could reach 99% after the reaction proceeded for 6 h. In terms of the resource utilization, the yield of FA could reach up to 32.44%. The resource utilization efficiency with Ni/SnO2 catalyst in sub-/supercritical reaction was about 2.5 times higher than that without catalyst. The kinetic reaction model was established to explore the reaction rate of the antibiotic degradation process. In addition, the Ea and the frequency factor of the reaction were 6455 J/mol and 5.78, respectively. As shown by characterization, the prepared Ni/SnO2 bimetallic catalyst had good activity and has already passed repeated stability experiments. In short, this method has broad application prospects in antibiotic catalysis and resource degradation.
研究领域:
环境科学
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催化化学
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能源化学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
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IF 4.326
Xiaoxu Duan,Yuming Qian,Jiwei Wu,Liang Ma,Zhihuang Zhao,Liwang Wang,Lingyu Xiao,Shifan Zhang
The large amount of waste gas containing volatile organic compounds (VOCs) discharged from petrochemical sewage plants will cause air pollution and seriously endanger the safety of human beings and the ecological environment. In this paper, we proposed a photocatalytic oxidation degradation technique of VOCs and designed a photocatalytic reaction device loaded with TiO2/SnO2 catalyst. Under UV light irradiation, there is an energy level difference in the conduction band between TiO2 and SnO2, which makes the photogenerated electrons (e–) migrate to SnO2 and reduces the surface electron density of TiO2. Thus, the recombination of photogenerated electron–hole pairs (e––h+) is inhibited and the catalyst activity is improved. Meanwhile, the synergistic effect of the oxidation of hydroxyl radicals (·OH) and ozone greatly improves the conversion rate. In addition, in the industrial side line, by studying the influence of inlet gas volume, inlet gas concentration, and gas humidity (RH) on the conversion rate of the VOCs, we revealed the operation law of the photocatalytic technique in industrial applications. Under the best working conditions, the purification rate of the VOCs was as high as 92.73%. This technique can not only effectively avoid the damage to the environment caused by polluting VOCs but also promote the low-carbon and green development of enterprises in the industry.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Jiaqi Yan,Jingxuan Zhao,Jing Guo,Zhiyong Yang,Mingjun Xiong,Langsheng Pan,Yongfei Li
The self-aldol condensation of cyclopentanone (CP) to aviation fuel precursors was studied over various acid-base bifunctional TiO 2 -based catalysts. Combining TiO 2 and SnO 2 improved the catalytic performance and reduced the apparent activation energy, resulting in a selectivity of 97.5 % for 2-cyclopentylidene cyclopentanone (dimer C 10 ) and 2,5-dicyclopentylidene cyclopentanone (trimer C 15 ) (with 79.2 % yield for dimer C 10 ) at a CP conversion of 92.5 %. Response surface methodology (RSM) analysis of the reaction parameters showed that the actual results were in considerable concordance with the predicted ones. The excellent catalytic performance and stability exhibited by the TiO 2 -SnO 2 nanocomposites catalyst were attributed to (i) the nanoscale mixed metal oxide grains (bonded by Ti–O–Sn) and highly dispersed active Ti δ+ species, which facilitated the adsorption and activation of CP; (ii) the increase in surface O C species contributing to the abundance of hydroxyl groups (including M δ+ –O – pairs), which promoted the formation of the enolate intermediates; (iii) the construction of appropriate medium acid-base sites and the Brønsted/Lewis acid sites (BAS/LAS) ratio, which favored the formation of the desired dimer C 10 . Conversely, the TiO 2 -SiO 2 catalyst with plentiful strong acid-base sites induced the successive condensation of CP, which favored the formation of trimer C 15 . Furthermore, a plausible reaction mechanism for the catalytic self-aldol condensation of CP over the TiO 2 -SnO 2 catalyst was proposed. This study developed an efficient and stable TiO 2 -SnO 2 catalyst for CP self-aldol condensation with promising application potential.
研究领域:
化学工程
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催化科学
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能源材料
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DOI
高影响因子
Energy & Environmental Materials
·
2021
·Vol. 6
·期 1
·e12298
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IF 15.122
Fanbo Meng,Jiayao Qin,Xingyu Xiong,Xiangjie Li,Renzong Hu
Metal–N 2 battery can be applied in both energy storage and electrochemical nitrogen reduction reaction (NRR); however, there has been only extraordinarily little study on metal–N 2 battery since its electrochemical reversibility still needs further proofs. And its electrochemical performances also need to be enhanced. Herein, we investigated the discharge–charge reactions between Li anode and N 2 cathode via designing an efficient catalyst of nanosized SnO 2 particles dispersed on N-doped carbon nanosheets (SnO 2 @NC) for the Li-N 2 battery, with good cyclic stability and a high specific capacity of 0.25 mA h (~500 mA h g −1 ) at a large current density of 1000 mA g −1 . The electrochemical reversibility of both NRR in the discharge process and nitrogen extraction reaction in the charge process for Li-N 2 battery is discussed. Time-of-flight secondary ion mass spectrometry results imply that the SnO 2 @NC can effectively promote the adsorption of N 2 and the activation of NRR in the discharge process. Furthermore, ex situ X-ray photoelectron spectroscopy and Fourier transform infrared tests are performed to study the electrochemical reversibility of Li-N 2 battery. It can be proved that the formation and decomposition of discharging product Li 3 N are electrochemical reversible during cycling in our deigned Li-N 2 battery system with SnO 2 @NC catalyst.
研究领域:
能量存储
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电化学
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材料科学
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催化
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2023
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IF 8.4
Guoxing Liu,Huai Liu,Junhua Zhang,Rui Zhang,Heng Zhang,Yong Sun,Lincai Peng
Catalytic conversion of concentrated carbohydrates and raw biomass into 5-hydroxymethylfurfural (HMF), an important and value-added platform chemical, is highly desirable for industrial applications but challenging. In this work, the tin pyrophosphate-oxide (SnP2O7–SnO2) catalyst has been designed to efficiently produce HMF from various concentrated carbohydrates and raw biomass. Especially, a high HMF yield of 67.8% was implemented over the SPC4 catalyst from concentrated glucose (36 wt %) in a biphasic solvent system of water and methyl isobutyl ketone. Moreover, the SPC4 catalyst disclosed a wide range of universality for converting various concentrated carbohydrates and raw biomass to HMF with satisfactory yields (45.9–79.5%). To the best of our knowledge, this is the first example of accomplishing appreciable HMF yields from carbohydrates and raw biomass at such a high substrate concentration. It has been demonstrated that the superior catalytic performance of the catalyst should originate from its balanced Lewis and Brønsted acidity and superhydrophilicity property. This work invents a highly promising heterogeneous catalyst for efficiently valorizing renewable lignocellulose-related compounds into versatile furans.
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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生物质转化
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）