CELLULOSE
·
2019
·Vol. 27
·期 1
·415-428
·
IF 3.917
Zhao Yushuang,Jing Shuangshuang,Peng Xinwen,Chen Zehong,Hu Yijie,Zhuo Hao,Sun Runcang,Zhong Linxin
Abstract Carbon dots (CDs), with high photostability, tunable excitation and emission wavelength, excellent biocompatibility, and environmental friendliness, attract great interest because of their promising applications in various fields. The synthesis of CDs from renewable biomass is especially attractive due to its sustainable and cost-efficient feature. However, one of the major problems for this route is the low yield of CDs. To overcome this issue, we propose a facile, universal, and highly effective synthesis method to prepare fluorescent CDs from various biomass hydrothermal carbons (HTCs). As compared with the current methods for synthesizing biomass derived CDs, our approach offers ultrahigh yield (42.5% based on the weight of biomass and 99.0% based on the weight of HTC) that is much higher than those obtained from other methods. The physiochemical properties of the as-prepared CDs can be tuned by reaction temperature. Furthermore, the PL quantum yield is high up to 16.6%, and is correlated with the surface chemical groups and conjugated π-domains of the carbon core in CDs. The fluorescence of CDs is effectively and selectively quenched by Cu 2+ , which enables CDs applying as fluorescent Cu 2+ nanoprobe with a linear range of 0–30 μmol L −1 and a detection limit of 85 nmol L −1 . Due to simple operation, mild condition, and low cost of the process, this method have a great potential in the large-scale synthesis and application of CDs from biomass. Graphic abstract
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2017
·Vol. 312
·期 2
·187-198
·
IF 1.282
Zheng Zhiyang,Wang Youqun,Zhao Wuwei,Xiong Guoxuan,Cao Xiaohong,Dai Ying,Le Zhanggao,Yu Shenglong,Zhang Zhibin,Liu Yunhai
Hydrothermal carbon spheres (HCSs) functionalized with 4-aminoacetophenone oxime group (HCSs-oxime) were prepared by a grafting method and explored to adsorption of uranyl ions from aqueous solution. The results of FT-IR, elemental analysis and zeta potential indicate a successfully modification with oxime group. The adsorbent shows an excellent adsorption capacity (Langmuir, q
m
= 588.2 mg g −1 ) and quick adsorption kinetic (equilibrium time of approximately 60 min) at optimal pH of 6.0. The adsorptive selectivity for uranyl ions has been also great improved in present with various co-existing ions. Overall, HCSs-oxime is a potentially promising material for selective removal of uranium in the contaminated solution.
研究领域:
环境科学
·
材料科学
·
核化学
·
水污染治理
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Hualun Li,Ye Li,Yuzhi Zhou,Bolin Li,Dongbin Liu,Hanyang Liao
In this study, we prepared a hydrothermal carbon-based supramolecular organic framework (HTC-MA-TMA) by grafting melamine and trimesic acid on hydrothermal carbon (HTC) for efficient removal of U (VI) from aqueous solutions. The nano-sized supramolecular organic framework (SOF) particles consisted of N-donor-containing melamine and O-donor-containing trimesic acid self-assembled through hydrogen bonds . Their large number of specific active sites acted as the immobilization center for capturing U (VI). Chemical modification facilitated the dispersion of the SOF particles on HTC, which was synthesized using a novel covalent/non-covalent bond strategy. The HTC-MA-TMA adsorbent exhibited exceptional U (VI) adsorption capacity (271.83 mg/g) because of the coordination interaction between UO 2 2+ and its ligands (amino, carboxyl and amide groups). The adsorption equilibrium was achieved within 30 min and followed a pseudo-second-order equation, suggesting the occurrence of a chemical adsorption process . Furthermore, the U (VI) ions adsorbed onto the HTC-MA-TMA adsorbent could be easily desorbed using 0.1 M HNO 3 solution. This regeneration caused no significant decrease in the sorption capacity of the adsorbent. These results suggest that advanced HTC-MA-TMA adsorbent can be applied in the nuclear-fuel industry for extracting U (VI) from radioactive wastewater .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2012
·
IF 4.173
Hang Wang,Lijian Ma,Kecheng Cao,Junxia Geng,Jun Liu,Qiang Song,Xiaodan Yang,Shoujian Li
A new salicylideneimine-functionalized hydrothermal-carbon-based solid-phase extractant was developed for the purpose of separating uranium selectively for sustainability of uranium resources. The resulting adsorption material was obtained via hydrothermal carbonization, calcination at mild temperature (573.15 K), amination, and grafting with salicylaldehyde in sequence. Both Fourier transform infrared spectra and elemental analysis proved the successful grafting of salicylideneimine onto hydrothermal carbon matrix. Adsorption behaviors of the extractant on uranium(VI) were investigated by varying pH values of solution, adsorbent amounts, contact times, initial metal concentrations, temperatures, and ionic strengths. An optimum adsorption capacity of 1.10 mmol g −1 (261 mg g −1 ) for uranium(VI) was obtained at pH 4.3. The present adsorption process obeyed pseudo-second-order model and Langmuir isotherm. Thermodynamic parameters (Δ H = +8.81 kJ mol −1 , Δ S = +110 J K −1 mol −1 , Δ G = −23.0 kJ mol −1 ) indicated the adsorption process was endothermic and spontaneous. Results from batch adsorption test in simulated nuclear industrial effluent, containing Cs + , Sr 2+ , Ba 2+ , Mn 2+ , Co 2+ , Ni 2+ , Zn 2+ , La 3+ , Ce 3+ , Nd 3+ , Sm 3+ , and Gd 3+ , showed the adsorbent could separate uranium(VI) from those competitive ions with high selectivity. The adsorbent might be promising for use in certain key steps in any future sustainable nuclear fuel cycle.
研究领域:
化学工程
·
材料科学
·
核能技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2021
·Vol. 18
·期 2
·2104477
·
IF 13.281
Lei Xie,Jinrong Liu,Xiaobing Bao,Jiadong Chen,Xiaozhong Zheng,Yanjun He,Wei Zhang,Jie Zeng,Yong Wang,Biao Kong
Synthesis of anisotropic carbonaceous nano- and micro-materials with well-ordered mesoporous structures has attracted increasing attention for a broad scope of applications. Although hard-templating method has been widely employed, overcoming the viscous forces to prepare anisotropic mesoporous materials is particularly challenging via the universal soft-templating method, especially from sustainable biomass as a carbon resource. Herein, the synthesis of biomass-derived nanowire-arrays based mesoporous nanorods and teeth-like superstructures is reported, through a simple and straightforward polyelectrolyte assisted soft-templating hydrothermal carbonization (HTC) approach. A surface energy induced interfacial assembly mechanism with the synergetic interactions between micelles, nanowire, nanorods, and polyelectrolyte is proposed. The polyelectrolyte acts not only as a stabilizer to decrease the surface energy of cylindrical micelles, nanowires and nanorods, but also as a structure-directing agent to regulate the oriented attachment and anisotropic assembly of micelles, nanowires, and nanorods. After a calcination treatment, the carbon nanorod and teeth-like superstructure are successfully coupled with Ru to directly produce supported catalysts for the hydrogen evolution reaction, exhibiting much better performance than the isotropic nanospheres based catalyst. This HTC approach will open up new avenues for the synthesis of anisotropic materials with various morphologies and dimensions, expanding the palette of materials selection for many applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2013
·Vol. 15
·期 10
·1-15
·
IF 2.175
Shen Chen,Yao Wei,Lu Yun
Highly functionalized carbon nanoparticles (F-CNPs) with average sizes of 5–30 nm were fabricated by hydrothermal carbonization of specific carbon sources at a mild temperature without usual strong acid treatment or surface modification. The morphology, structure, and fluorescent properties of the nanoparticles were characterized by transmission electron microscopy, dynamic light scattering, Fourier-transform infrared spectra, X-ray photoelectron spectroscopy, Raman spectra and fluorescent spectrophotometer. As a result, the abundant carboxylic, sulfonic, amine, or ethanamide groups were furnished on the surface of these carbon nanoparticles, offering the reaction sites for their possible further functionalization, and these functional groups also enhance the dispersion of carbon nanoparticles which are kept without precipitation for months. The hydrothermal treatment which is simple, green, and economical, also can endow the F-CNPs much more carboxyl groups, thus improving the quantum efficiency of as-prepared products. These functionalized carbon nanoparticles demonstrate the excitation wavelength-independent photoluminescence behavior, implying their potential applications in biological labeling, imaging, and chromatography.
研究领域:
材料科学
·
化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2015
·
IF 3.453
Xiujuan Chen,Zhiguo Li,Li Wei,Xiaoli Li,Siping Liu,Jiyou Gu
In this study, 3D hierarchical cabbage-like carbonaceous materials (CCMs) have been fabricated by one-step hydrothermal carbonization of furfural in the presence of cobalt acetylacetonate under mild condition. The morphologies and structures of the CCMs could be well controlled by regulating the reaction conditions including reactant concentration, reaction temperature and time. It was revealed that the cobalt acted as a structure-directing agent during the formation of the cabbage-like structures, which induced the morphology evolution of the products from microspheres into hierarchical CCMs. The good electrochemical performance and well-loading of Pt nanoparticles on the surface of the CCMs further indicated that the CCMs have potential applications in electrochemical capacitors and heterogeneous catalysis .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Ruikun Wang,Zhaohua Lin,Pingbo Peng,Shiteng Tan,Zhenghui Zhao,Qianqian Yin,Chunbo Wang
Reusing the wastewater byproduct of the hydrothermal carbonization (HTC) process as a water source to prepare biomass slurry feedstock for the next HTC run provides a feasible wastewater disposal method. However, the influence of various organic components contained in the hydrothermal wastewater (HW) on the formation routes and characteristics of hydrochar is yet to be clarified. In this study, five representative organic components, phenol, acetic acid, furfural, 5-hydroxymethylfurfural (5-HMF), and 2,5-hexanedione, were selected to study their effects on the hydrochar fuel characteristics and HW components, based on which the hydrochar formation pathways in an organic wastewater environment were proposed. The phenol, furfural, and 5-HMF contained in the wastewater source could polymerize with the active intermediates from biomass degradation, thereby resulting in an increase in the hydrochar mass yield (HCY) by 1.13%–7.07% and an increase in the higher heating value of hydrochar to 27.36 MJ/kg. In contrast, the acetic acid and 2,5-hexanedione contained in the wastewater source resulted in a decrease in HCY, probably because of the catalytic effects of volatile fatty acids on biomass hydrolysis. Moreover, wastewater sources with all five organic components increased the energy recovery efficiency from biomass to a high level of 97.28% under the two effects of deep polymerization and catalytic carbonization.
研究领域:
能源与环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Qiang Wang,Yaru Li,Zichen Yu,Xuewen Li,Shouhua Yin,Wen Ji,Yonghua Hu,Weiping Cai,Xianbiao Wang
Highly porous carbon adsorbent is much desired to diminish greenhouse effect caused by CO 2 emission and benefit for subsequent carbon cycle . Herein, a low-cost and environment-friendly carbonization strategy was reported for preparation of highly porous carbon derived from biomass. Such carbonization is a synergistic process with hydrothermal treatment coupled with a subsequent pyrolysis using sugarcane as biomass. The obtained hydrothermal-pyrolysis derived porous carbon (HPC) has a BET surface area of 938 m 2 /g, which is much higher than that of carbon produced through direct pyrolysis (PC, 528 m 2 /g). During the hydrothermal carbonization pretreatment, highly thermostable aromatic skeletons are formed and converted to carbon skeletons in the post-pyrolysis process, leading to formation of highly stable micropores and higher surface area. Further, HPC shows remarkable adsorption ability of CO 2 (2.8 mmol/g, 25 °C, 1 bar), higher than that of PC (2.1 mmol/g). In addition, the HPC exhibits high CO 2 /N 2 adsorption selectivity and recyclability, demonstrating its potential application in CO 2 capture. This work not only gives new light for tailoring carbon materials with highly porous structure but also provides novel adsorbent for CO 2 adsorption.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Mengxue Ling,Dachao Ma,Qisong Zhong,Cheng Liao,Zheng Liu,Dongbo Wang,Biao Han,Qingge Feng
Plastic and biomass waste are high quality carbon sources for carbon materials. Polyvinyl chloride (PVC) and shrimp shells were selected to investigate the synergistic conversion of co-hydrothermal carbonization and the electrochemical properties of carbon materials. It was found that the particle agglomeration of PVC plastics could be effectively avoided, thus, the dechlorination from UPVC tubes and shrimp shells at 220 °C for 120 min (HUPS 220–120) was up to 100.9 wt%, which was four times higher than solo hydrothermal treatment of UPVC tubes. The dissolution of calcium and magnesium in PVC plastics or shrimp shells was positively and linearly related to the removal of chloride ions on PVC plastics, with the molar ratio close to 1:2. The hydrolysis of shrimp shells catalyzed by hydrogen chloride (HCl), providing abundant nucleophilic groups, which in turn substituted for chlorine on PVC to form polyethers and polyamines. Interestingly, the co-hydrothermal treatment induced O and N functional groups on the hydrochars to maintain and evolve into C O and pyridinic-N after further carbonization and activation. With the features of large specific surface (1161.3 m 2 ·g −1 ), numerous microporous (87.66 %), high graphitization degree (I D /I G =0.85), and abundant C O and pyridinic-N, the carbon materials derived from hydrochar (CHPS 220–60) demonstrated strong charge storage capacity, good conductivity, and multiple redox potentials, raising the capacitive performance as high as 277.5 F·g −1 at 0.5 A·g −1 . This work aims to provide an effective method not only for the upcycling of PVC plastics and shrimp shells but also for the preparation of energy storage materials.
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
Journal of Cleaner Production
·
2017
·
IF 5.715
Nan Zhou,Honggang Chen,Qiuju Feng,Denghui Yao,Huanli Chen,Haiyan Wang,Zhi Zhou,Huiyong Li,Yun Tian,Xiangyang Lu
The acidic environment has been confirmed to have significant influence on the biochar products through hydrothermal carbonization . To investigate the effect of H 3 PO 4 on the surface properties and adsorption mechanisms of the biochar, fresh banana peels were used as feedstock and transformed into hydrochars under the catalysis of H 3 PO 4 with concentration ranges from 0% to 50%wt. The addition of H 3 PO 4 greatly impacted the physicochemical properties of the as-obtained hydrochars, such as carbonization degrees, pH values, amount of surface acidic functional groups and then further affected the adsorption mechanisms of lead ions on those hydrochars. Hydrochars catalyzed by H 3 PO 4 with higher concentration showed higher degree of carbonization, lower value of pH and fewer amount of acidic functional groups, while lower content of H 3 PO 4 could not completely catalyze the degradation reactions and resulted in larger quantity of intermolecular locked oxygen containing groups that could not be participated into the adsorption process . Among all six samples, hydrochar generated in 30%wt H 3 PO 4 exhibited the best adsorption property of 241 mg g −1 , possibly due to the largest concentration of the acidic functional groups on the surface rather than in the intermolecular structure of the carbon. It had been confirmed that the adsorption mechanisms were the combination of surface complexation, cationic exchange and part of precipitation. Hydrochars derived from fresh banana peel via hydrothermal carbonization catalyzed by phosphoric acid could be excellent adsorbents for lead removal in aqueous environments .
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xingyun Zhao,Chengxiao Zhao,Hao Jia,Yifan Niu,Jiangyan Jin,Xiaojian Liu,Zhenyu Li,Xuemei Qin,Ke Li
Hydrothermal carbon (HTC) and modified hydrothermal carbon coated silica microspheres were optimized and applied for the separation of phenolic acids, standard saccharides and natural oligosaccharides in the extract of Traditional Chinese Herbal Medicine (TCM). The materials obtained were characterized by scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FT-IR), the BET surface area analysis and the zeta potential. The investigation of the synthesized materials and the purchased amide modified silica stationary phases column was performed with a set of test solutes. Both the synthesized HTC coated silica gel (silica@HTC) and the modified silica@HTC column exhibit excellent hydrophilicity. Notably, the poly(ethyleneimine) (PEI) modified silica@HTC column demonstrates superior chromatographic performance in the separation of saccharides. This work showed significant potential in the modification of novel hydrothermal carbon stationary phases for application in separating polar oligosaccharide compositions from TCM extracts and similar sources.
研究领域:
分析化学
·
中药学
✓ 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）