Carbon Capture Science & Technology
·
2023
·
IF 0
Xuan Wang,Yaoxing Wang,Xueqi Li,Jian Li,Yanjun Xie,Daxin Liang,Wentao Gan
Utilizing abundantly available biomass materials to prepare adsorbent substances is a simple and cost-effective method for CO 2 adsorption, which, however, is often hampered by low adsorption capacity. Here, we demonstrate near-spherical active carbon (C-DWP/Zn) with high CO 2 adsorption ability, employing delignification combination with ZnCl 2 activation of natural wood powder. Removing lignin from wood cell walls facilitates easy absorption of Zn ions by the cellulose nanofibers (CNFs), thereby promoting micro/nano pores formation. Moreover, rapid dehydration of cellulose molecular chains alters the morphology of activated carbon, resulting in a transition from a granular to a near-spherical shape. Consequently, C-DWP/Zn with high specific surface area of 1769 m 2 g −1 , shows a significantly higher microporous volume than that of a control sample without delignification. The CO 2 adsorption capacity of C-DWP/Zn, with values of 3.51 mmol g −1 and 5.12 mmol g −1 at 1 bar, 25 °C and 0 °C, respectively, is superior to that of commercial activated carbon. Attributable to its optimal micropore structure, C-DWP/Zn exhibits high CO 2 /N 2 selectivity. Furthermore, the high carbon dioxide adsorption efficiency of C-DWP/Zn was maintained and the substance could be reused at least 20 times. Near-spherical active carbon adsorbents prepared from low-value wood powders, all featuring high CO 2 adsorption performances, reasonable CO 2 /N 2 selectivity, good recoverability, suitable heat of adsorption, and fast adsorption kinetics, which are promising candidates for practical CO 2 adsorption.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
BIORESOURCE TECHNOLOGY
·
2020
·
IF 7.539
Yong Huang,Shasha Liu,Muhammad Asif Akhtar,Bin Li,Jianbin Zhou,Shu Zhang,Hong Zhang
To understand the potential origin of char activity responsible for volatile evolution during biomass pyrolysis, the interactions between benzyl phenyl ether (BPE, a typical lignin dimer) and pinewood chars prepared under a series of thermal, acidy, and steamy conditions were investigated. The results showed the activity of low-temperature char on BPE conversion was mainly attributed to the surface O-containing functional groups. The BPE conversion decreased as the temperature for char preparation raised, resulting from the elimination of char surface functional groups to a large degree at high temperature. The low activity of high-temperature char on BPE conversion could be recovered by acid-washing to release metal-occupied carbon based active sites (e.g., small aromatic rings), and further promoted by steam activation to modify the surface property and porous structure, finally achieving a full conversion of BPE and high selectivity to the products of phenol and toluene.
研究领域:
能源科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TETRAHEDRON
·
2023
·
IF 2.1
Zhiwei Wang,Rong Zhao,Jia Lin,Chaoyang Liu,Qiang Jia,Changhu Chu
A highly efficient and Tempo-free catalytic aerobic alcohol oxidation method has been developed using charcoal-supported Cu 0 nanoparticles（Cu-A） in conjunction with pyridine. Various alcohols, bearing different functional groups, can be readily oxidized to their corresponding ketones and aldehydes under mild conditions.
研究领域:
化学
·
催化
·
有机合成
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Liping Lou,Qian Huang,Yiling Lou,Jingrang Lu,Baolan Hu,Qi Lin
To investigate the role of adsorption by biochar and biodegradation by bacteria in the wastewater treatment system of microorganisms immobilized on biochar, Nonylphenol (NP) removal (adsorption + degradation) rates and degradation rates from water by NP degrading bacteria immobilized on bamboo charcoal (BC) and wood charcoal (WC) were examined in a short-term and long-term. Results showed that cells immobilized on different biochar had different NP removal effects, and cells immobilized on bamboo charcoal (I-BC) was better. After eight rounds of long-term reuse, the cumulative removal rate and the degradation rate of NP in water by I-BC were 93.95% and 41.86%, respectively, significantly higher than those of cells immobilized on wood charcoal (69.60%, 22.78%) and free cells (64.79%, 19.49%) (P < 0.01). The rise in the ratio of the degradation rate to the removal rate indicated that the long-term NP removal effect is more dependent on biodegradation. The amount of residual NP in I-BC still accounted for about 50%, indicating that the secondary pollution in the disposal of carrier could not be ignored. In addition, promotion effect of biochar on microorganisms were observed by SEM , quantitative PCR and 16S rRNA. Pseudomonas , Achromobacter , Ochrobactrum and Stenotrophomonas were predominant bacteria for NP degradation. The addition of biochar (especially bamboo charcoal) also effectively delayed the transformation of their community structure.
研究领域:
环境工程
·
微生物学
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MEAT SCIENCE
·
2021
·
IF 5.209
Huan Liu,Teng Hui,Fei Fang,Shaobo Li,Zhenyu Wang,Dequan Zhang
The formation of key aroma compounds in roasted mutton during the traditional charcoal process were investigated. The results indicated that the samples roasted for 0–15 min could be discriminated using a flash GC E -nose and GC-O-MS combined with multivariate data analysis. A total of 37 odorants were identified, among which 15 odorants were confirmed as key aroma compounds by aroma recombination experiments. Significant increases in key aroma compositions and concentrations in samples were observed during the roasting process, in which hexanal had the highest concentration. The odour activity values (OAVs) of 15 key aroma compounds were maintained at high levels in the samples after roasting for 10 min. The roasted mutton had typical aromas of meaty, fatty, roasty, grassy, and sweet odours. The multivariate linear modeling indicated that a lower specific heat capacity and lower water activity could contribute to the formation of aroma compounds of samples.
研究领域:
食品科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Shuqiang Pang,Chengfeng Zhou,Yuanyuan Sun,Kewei Zhang,Wanneng Ye,Xiaoliang Zhao,Liping Cai,Bin Hui
Structural design of high-performing catalysts for boosting refractory organic pollutants degradation remains a great challenge. Herein, a natural wood-derived catalyst comprising of wood carbon and Fe/Co sites was proposed as the peroxymonosulfate (PMS) activator to enhance ciprofloxacin (CIP) pollutant degradation. The bimetallic Fe/Co sites were highly dispersed and stabilized on carbon surface. The carbon-based catalyst achieved 100% removal rate for CIP within 4 min. After four consecutive cycles, the removal rate still reached 92.8%, displaying separable and reusable ability of this catalyst. The carbon-based catalyst could also exhibit excellent degradation performance under a wide pH range of 2.0–8.0. Density functional theory (DFT) calculation revealed that Fe/Co sites at wood carbon had the high adsorption energy and induced interfacial electron transfer for enhanced breakage of O–O bond. The sulfate radical (SO 4 •− ), hydroxyl radical (•OH) and singlet oxygen ( 1 O 2 ) were main reactive oxygen species and their relative contribution was calculated to be 13.51%, 17.54% and 68.95%, respectively. The formed by-products and intermediates had almost no toxicity. This work proposes a new structural design of wood carbon-based system for enhancing antibiotic pollutant in aqueous environment, which facilitates the development of wastewater treatment technology.
研究领域:
环境科学
·
催化材料
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Lixin Wang,Jie Ouyang,Yi Tian,Liangliang Zhou,Mengting Cheng,Yuzhu Wang,Xi Ren,Zhuoshi Wu,Wei Yin,Qingquan Sheng,Jianhua Luo,Liaoyuan Xia,Yongfeng Luo
The exceptional electrical conductivity, lightweight nature, and mechanical properties of wood-derived materials render them highly promising for self-supporting supercapacitor electrodes. However, the underutilization of tracheid space in wood suggests that its inherent structural advantages have not been fully harnessed. Herein, the electrodeposition of nickel–cobalt layered double hydroxide (NiCo-LDH) nanosheets onto nitrogen-doped carbonized wood (NCW) is employed to tackle the challenge. The increased thickness of vertically grown NiCo-LDH nanosheets on the tracheid inner wall significantly enhances tracheid cavity utilization. Consequently, the optimal composite electrode demonstrates an outstanding mass loading of 71.7 mg cm −2 and achieves a capacitance of 65.38F cm −2 at 10 mA cm −2 . Furthermore, the assembled asymmetric supercapacitor impressive cycle stability, maintaining 81.75 % of its original capacitance after 10,000 cycles, and achieves a significant energy density of 1.92 mWh cm −2 at 2.92 mW cm −2 . This study presents a convenient and efficient methodology for design of wood-derived carbon electrodes and high-performance supercapacitors with ultra-high mass loading.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yuwei Li,Chengfeng Zhou,Xiaohan Zhang,Bin Hui
Developing high-performance and low-cost heterogeneous catalyst is an urgent need to activate peroxymonosulfate (PMS) towards organic pollutants degradation. Herein, a novel block catalyst comprising of iron oxide nanosheets and wood carbon (FeO X @WC) is proposed to enhance PMS activation for ciprofloxacin (CIP) degradation. The resultant FeO X @WC achieved the removal rate of 86.6% in 10 min. This hardwood-derived catalyst remained the excellent degradation performance in a wide pH range of 2.0–11.0 and the co-existence of other organic pollutants. Inspired by water circulation pathway in tree, a flowthrough degradation device was constructed via using the hardwood-derived carbon block with large vessel channels and small fiber tracheids channels in diameter. The removal rate reached 75.4% in 17 min for mass pollution solution (450 mL), suggesting the good degradation ability in practical application. Quenching experiments, electron paramagnetic resonance and electrochemical analysis reveal that non-radical pathways including singlet oxygen and electron transfer occupy the dominant effect. Nine intermediates were identified and three kinds of degradation pathways were proposed. This work provides a charcoal-based block catalyst to enhance the degradation efficiency towards aqueous CIP pollutants.
研究领域:
环境科学
·
催化化学
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
MONATSHEFTE FUR CHEMIE
·
2024
·Vol. 155
·期 11
·1119-1124
·
IF 1.7
Fang Chao,Ma Kai,Li Zixu,Wang Fei,Jia Qiang,Chu Changhu
A highly efficient, low-cost Cu-based catalytic system has been developed, which utilizes a combination of charcoal-supported Cu 0 nanoparticles and pyridine as a catalyst for the aerobic oxidation homocoupling of terminal alkynes. This system facilitates the smooth aerobic oxidation of a series of terminal alkynes using oxygen as the oxidant, which results in the formation of corresponding 1,3-conjugated diynes, and water is the sole byproduct. Furthermore, the catalyst has demonstrated good reusability, maintaining its performance for up to five cycles. Graphical abstract
研究领域:
催化
·
有机化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）