Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Binyuan Gao,Chongran Sun,Tao Yang,Haina Cheng,Hongbo Zhou,Yuguang Wang,Zhu Chen
Red mud is a highly saline and alkaline solid waste generated in alumina refinery, which entails dealkalization for safe disposal and valorization. Herein, Trichocomaceae sp. K-2, a novel fungus isolated from marine sediment , was used for the simultaneous dealkalization of red mud and recovery of valuable metals. The fungus demonstrated robust growth at high salinity (45 g/L NaCl), good tolerance to high pH (up to 12), and capability of utilizing low-cost substrates derived from lignocellulosic biomass. Both structural and free alkali can be removed by Trichocomaceae sp. K-2 to achieve a significantly lower minimum pH (<4) in a considerably short timeframe (<16 days), and the alkali removal efficiency as high as 94% was attained. Moreover, concomitant leaching of valuable Nd, Sc and Y from red mud during dealkalization was feasible. Physical disintegration and chemical erosion by the secreted organic acids were responsible for the effective dealkalization, as well as leaching of valuable metals. This study sheds lights on how marine microorganisms can be harnessed to the green disposal of red mud, and provokes the exploration of more robust and versatile marine microbes for the sustainable and cost-effective management of other highly saline and alkaline solid waste.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 14
·4953-4961
·
IF 6.119
Junyue Li,Ziyi Wang,Huayu Chen,Qiqi Zhang,Huilin Hu,Lequan Liu,Jinhua Ye,Defa Wang
Photocatalytic reduction of carbon dioxide (CO2) into hydrocarbon fuels has attracted increasing research attention in recent years. However, the fast recombination of photoinduced charge carriers and poor adsorption/activation capability of CO2 molecules limit the photoconversion efficiency. Herein, we report on loading a two-dimensional (2D) titanium carbide (Ti3C2) MXene as a noble-metal-free cocatalyst onto zinc oxide (ZnO) via a facile electrostatic self-assembly method for efficient CO2 photoreduction. It is interesting to find that the ZnO loaded with 7.5 wt% of surface-alkalinized Ti3C2 exhibited remarkably improved evolution rates of CO (30.30 μmol g−1 h−1) and CH4 (20.33 μmol g−1 h−1), which were approximately 7-fold and 35-fold those of bare ZnO, respectively. The surface-alkalinized Ti3C2 MXene is believed to play a crucial role in improving the separation/transfer of photoinduced charge carriers and the adsorption/activation of CO2 molecules, accounting for the superior photocatalytic activity of CO2 reduction. Our work demonstrates that the Ti3C2 MXene could be employed as a noble-metal-free cocatalyst for efficient photocatalytic CO2 reduction.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Mei Ming,Yanlin Ren,Min Hu,Yun Zhang,Ting Sun,Yuling Ma,Xiaojing Li,Weidong Jiang,Daojiang Gao,Jian Bi,Guangyin Fan
Exploring MXenes as supports for synthesis of highly efficient catalysts are extremely important for hydrodechlorination of chlorophenols because of the acute toxicity and strong potential bioaccumulation of chlorophenols. We reported a facile strategy to synthesize Rh nanoparticles deposited on 2D alk-Ti 3 C 2 X 2 (X = O, F) (alk-Ti 3 C 2 X 2 for short) MXene, which was prepared through the removal of the Al layers of Ti 3 AlC 2 and post-treatment by alkalization. Modifying the Ti 3 C 2 X 2 support by alkalization triggered the substitution of surface fluorine groups with surface oxygen species. The changes in the surface chemistry of alk-Ti 3 C 2 X 2 effectively prevented particle aggregation to form well-dispersed Rh nanoparticles in small sizes with relative high metal dispersion, thereafter improving the hydrogen uptake capacity of the catalyst. Consequently, the Rh/alk-Ti 3 C 2 X 2 catalyst significantly enhanced the catalytic performance for the HDC reaction, which could be assigned to the large number of active components from small Rh nanoparticles. This strategy provides a basis for investigating the use of MXenes as supports to synthesize well-defined metal nanoparticles in 2D layered structures for potential applications.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Zhiqiang Wang,Pengfei Tang,Shuaishuai Chen,Yuxian Xing,Chuantao Yin,Jiajun Feng,Feng Jiang
With the dramatically increased environmental problems, the rational design of sustainable polymers from renewable feedstocks opens new avenues to reduce the huge pollution impact. The major challenge for sustainable polymers is the decreased mechanical performance compared to that of petroleum-based materials. In this work, fully biobased sustainable elastomers were developed by integrating renewable chitin , lignin, and plant oil into one macromolecule , in which chitin was chosen as the rigid backbone , while a lignin-derived monomer vanillin acrylate (VA) and a plant oil-based monomer lauryl acrylate (LA) were selected as the hard and soft segments for the grafted side chains. A series of Chitin- graft -poly(vanillin acrylate- co -lauryl acrylate) (Chitin- g -P(VA- co -LA)) copolymers with varied feed ratios and chitin contents were synthesized by using reversible addition-fragmentation chain transfer (RAFT) polymerization as an effective grafting strategy. In addition, a dynamic cross-linked network was incorporated via Schiff-base reaction to improve the macroscopic behavior of such kind of chitin graft elastomers. These sustainable elastomers are mechanically strong and show excellent reprocessablity, as well as outstanding UV-blocking property. This strategy is versatile and can inspire the further development of fully biobased sustainable materials from natural resources .
研究领域:
材料科学
·
可持续化学
·
生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 18
·e202305086
·
IF 1.9
XuKun Qian,ZeFeng Zhao,RuiHua Zhang,ChangBai Yu
Graphical The adsorption capacity of Pb(II) ion for accordion-like Ti 3 CN Mxene is significantly increased after alkalization treatment. The maximum adsorption capacity of the alkalized Ti 3 CN MXene is up to 87.4 mg ⋅ g −1 , and the adsorption ratio reaches 96.6 %. The adsorption process is mainly controlled by chemical adsorption and belongs to surface monolayer adsorption. The presence of poisonous Pb(II) ions in water resources has raised global health concerns. Herein, the adsorption performance of accordion-like Ti 3 CN MXene for Pb(II) ions was investigated for the first time. Batch experiments were carried out by varying modifications, pH values, initial Pb(II) concentrations, adsorption time and temperatures. The results prove that the alkalized-Ti 3 CN shows enhanced adsorption performance. Although the temperature effect is insignificant, the Pb(II) adsorption is strongly pH-dependent. The maximum Pb(II) adsorption capacity of alkalized −Ti 3 CN is about 2.5 times higher than that of activated carbon. The adsorption ratio of Pb(II) is up to 96.6 %. The adsorption capacity increases with increasing the initial concentration of Pb(II). The alkalized-Ti 3 CN adsorbs Pb(II) very quickly and the adsorption equilibrium is nearly achieved within 70 minutes. The adsorption follows the quasi-second-order kinetic model as well as the Langmuir model, and is mainly controlled by chemical adsorption. It is preliminarily concluded that Pb(II) replaces Na(I) of the −ONa functional groups on the alkalized-Ti 3 CN surfaces. This study proves the alkalized-Ti 3 CN MXene has potential application for the purification treatment of wastewater contaminated with Pb(II) ions.
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
DRUG DEVELOPMENT AND INDUSTRIAL PHARMACY
·
2014
·
IF 2.006
Lin Zhong,Xingyi Zhu,Bo Yu,Weike Su
The amorphous solid dispersions of telmisartan salts were prepared by cogrinding, in presence of alkalizers and polyvinylpyrrolidone (PVPk30). Five alkalizers in this study were MgO, Na2CO3, K2CO3, NaHCO3 and meglumine. In soft mode using a roll mill, the drug could not form salt with MgO or NaHCO3, whereas partial drug had been transformed into salt with carbonates or meglumine. Under cogrinding, the organic base meglumine was easier to react with telmisartan than other two carbonates. For getting good dissolution performance, the drug had to be transformed into salt completely. A high intensity oscillating mill was applied for producing telmisartan meglumine salt. Multi-instrumental characterizations attested the formation of amorphous salt by high mechanical process, involving dissolution test, fourier transform infrared spectroscopy and powder X-ray diffractometry. It was evident that solid dispersions of telmisartan meglumine salt significantly increased the drug dissolution rate in intestinal fluid.
研究领域:
药剂学
·
药物化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF FORESTRY RESEARCH
·
2025
·Vol. 36
·期 1
·1-20
·
IF 4.6
Yu Jie,Zhang Xiaoyuan,Zhang Zijian,Guo Hongliang,Noborio Kosuke,Han Song
Petroleum extraction and its organic pollutants have numerous negative consequences on the composition and ecological function of grasslands, such as vegetation degradation, reduction in species diversity, and salinization. Thus, finding a comprehensive method for polluted soil and restoring grasslands faces many challenges, and the mechanism to influence soil environments and microbial community composition remains unclear. In this study, container experiments explored the potential of sulfonic acid group (–SO 3 H groups) modified biochar combined with isolated bacterium (named Y-1, Acinetobacter- spp.) on physicochemical properties and microbial communities of polluted soil. The results show that modified biochar and Y-1 combined addition had the highest petroleum degradation rate (39.4%), and soil nutrients such as dissolved organic carbon (DOC), cation exchange capacity (CEC), available nitrogen, invertase and urease activities in CK were decreased by 35.4, 12.1, 30, 43.2 and 32.5% compared to treatments. The contents of available phosphorus in CM treatment were increased 2.4 times compared to CK. The –SO 3 H groups efficiently improve salinity by accumulating Ca 2+ and Mg 2+ and inhibiting the aggregation of Na + . The correlation heatmap indicated that soil organic carbon, total nitrogen and CEC markedly interact with microbial communities. High-throughput sequencing indicated that the biomarkers enriched by the present integrated treatment are crucial for stimulating nitrogen and phosphorus cycles. The results indicate that -SO 3 H groups modified biochar, and Y-1 has great potential to serve as a novel bioremediation technology to remediate soil from petroleum pollutants and alkalization and achieve better restoration of degradation grasslands. Graphical abstract
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
BIOMATERIALS
·
2025
·
IF 12.9
Yong Liu,Bowen Li,Run Yang,Chenxu Shang,Yang Bai,Bin Zheng,Liang Zhao
Lysosomes play a crucial role in regulating cancer progression and drug resistance. However, there is a pressing need for the development of drugs that can safely and effectively modulate the pH of cancerous lysosomes in a controlled manner. In this study, we propose a novel strategy for lysosomal alkalinization triggered by piezoelectricity. Our findings indicate that the electrons generated by (BaTiO 3 /Zr/Ca) BCZT under sonication effectively alkalinize the lysosomes. Molecular dynamics simulations further demonstrate that alterations in lysosomal pH lead to modifications in the conformation of V-ATPase (proton pump), enhancing its interaction with sodium ions while partially excluding hydrogen ions from entering the lysosomes. This mechanism helps maintain lysosomal alkalization, resulting in reduced hydrolase activity and preventing the degradation of proteins and damaged organelles. The accumulation of nanoparticles within the lysosomes causes swelling and gradual destruction of the lysosomal membrane. Consequently, this lysosomal dysfunction hampers the fusion with autophagosomes, inhibiting autophagy in tumor cells and promoting apoptosis in various tumor types. Our strategy significantly inhibited tumor volume growth in mice during animal studies. In conclusion, our piezoelectric-triggered lysosomal alkalinization strategy holds promise for innovative breakthroughs in the treatment of multiple cancers.
研究领域:
生物医学工程
·
癌症研究
·
细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Weiqi Xie,Shiwen Huang,Donglin Tang,Shumei Liu,Jianqing Zhao
Recently, biomass-derived fire-safe epoxy thermosets have been developed for the substitute of petroleum-derived bisphenol A epoxy thermosets due to the shortage of petroleum resources and the negative health impacts of petroleum-derived products. However, the synthesis of bio-based epoxy thermosets combining excellent mechanical properties and fire-safety performance is still a great challenge. In this paper, a novel Schiff base compound 4,4′-((1E,1′E)-((oxybis(4,1-phenylene))bis(azanylylidene))bis(methanylylidene))bis(benzene-1,2-diol) (PH-ODA) was efficiently synthesized from bio-based protocatechualdehyde. PH-ODA was subsequently reacted with epichlorohydrin to obtain the epoxy monomer (1E,1′E)-N,N′-(oxybis(4,1-phenylene))bis(1-(3,4-bis(oxiran-2-ylmethoxy)phenyl)methanimine) (PH-ODA-EP). After curing PH-ODA-EP with 4,4′-diaminodiphenylmethane (DDM), the cured resin PH-ODA-EP/DDM network possessed a high glass transition temperature ( T g ) of 204.9 °C and showed a 181.8%, 105.8% and 87.0% increase in char yield (in N 2 ) (41.7% vs. 14.8%), storage modulus (at 30 °C) (6.01 GPa vs. 2.92 GPa) and tensile modulus (6.21 GPa vs. 3.32 GPa), respectively, compared with the cured bisphenol A epoxy resin (DGEBA)/DDM. Moreover, PH-ODA-EP/DDM possessed excellent fire-safety properties (limited oxygen index (LOI) value = 40.5%) due to the introduction of Schiff base structure, showing a 90.9% and 72.0% reduction (compared with DGEBA/DDM) in peak heat release rate and total heat release value. This work provided a facile and sustainable route for synthesizing Schiff base compounds using biomass-derived resources, exhibiting great potential for the application in high-performance fire-safe epoxy thermosets.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2016
·
IF 4.219
Zhi Liu,Yanxiong Pan,Kai Shi,Weicai Wang,Chao Peng,Wei Li,Di Sha,Zhe Wang,Xiangling Ji
Hydrophilic luffa sponges are prepared by grafting polymerization of acrylamide (AM) on luffa cylindrica and subsequent partial hydrolysis under alkaline conditions. Attenuated total reflection infrared spectroscopy is used to verify the composition of the grafted (luffa- g -PAM) and hydrolyzed (luffa- g -(PAM- co -PAANa)) samples. Alkalization conditions, including aqueous NaOH concentrations, alkalization temperature, and time, are studied extensively. Optimized conditions are then obtained. The grafting percentage (GP) of polyacrylamide increases with the feed ratios of [AM]/[OH] and [Ce]/[OH], reaction temperature, and time. Furthermore, the GP can reach up to 160%. Pristine, alkalized, grafted, and hydrolyzed luffa sponges show rapid absorption kinetics, and the pseudo second-order rate equation is applied to describe their kinetic procedure. Reaction conditions, such as [AM]/[OH], [Ce]/[OH], reaction temperature and time, influence the water absorption capacities of grafted and hydrolyzed samples. The hydrolyzed luffa sponges particularly exhibit high water absorption capacities of 75 g g −1 . The absorption mechanism is also discussed.
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 MOLECULAR LIQUIDS
·
2023
·
IF 6
Ruoyu Du,Weiwei Guo,Yu Shen,Jinhang Dai,Haidong Zhang,Ming Fu,Xingmin Wang
The DNS assay has been already a universally method for the in situ determination of reducing sugars (RS) in aqueous phase solvents. Today, “greener biorefineries” require in situ measurement of reducing sugars in non-aqueous solvents such as natural deep eutectic solvents (NADESs). Therefore, that DNS assay cannot be performed successfully in such eutectic phase solvent becomes a puzzle that must be solved. In this work, an improved DNS method, which we call the DNS'' method, was established and implemented successfully in hydrophilic eutectic phase solvent systems ( hi NADES). The tickets to the success of DNS'' method are the inserted two essential steps, water-adding disintegration and pH alkalization. Then we tested two excellent RS solvents (ChCl_Gly and ChCl_LA) from six synthetic ChCl-based hi NADESs. The optimal disintegration conditions for assaying RS in ChCl_LA/NaOH (ChCl_Gly/H 2 O) were volume ratio 3: 1 (3: 1), molar concentration 2.0 mol/L (0 mol/L). Thereafter, we drew the standard curves of seven RSs in ChCl_Gly and ChCl_LA, which are glucose, xylose, fructose, mannose, fucose, rhamnose, and maltose. We determined that HMF interferes with DNS assay in hi NADES. The principles and standard procedures of DNS'' method were also investigated. Finally, the enzymatic saccharification of microcrystalline cellulose (MCC) by two commercial Trichoderma reesei cellulases (Celluclast® 1.5 L and Cellic® CTec2) in neat hi NADES was tracked using the DNS'' method.
研究领域:
生物化学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
TETRAHEDRON
·
2017
·
IF 2.651
Xu Tang,Juan Han,Yun Wang,Liang Ni,Longhua Li,Lei Wang,Wenli Zhang
A new on-off fluorescent probe 1 for Cu 2+ based on Schiff base compound was designed and synthesized by one-step reaction. The single probe 1 exhibited strong green fluorescence emission . A fluorescence quenching effect and faint color change were observed as soon as the Cu 2+ was added to the probe system in H 2 O/EtOH (v/v = 8:2, HEPES buffer, 0.05 M, pH = 7.4) solution. Other common metal cations did not cause the changes in the fluorescence and color of the probe 1. The optical properties were studied by the fluorescence emission and UV–Vis spectra. Meanwhile, the geometry optimizations of probe 1 and the [1-Cu 2+ ] coordination complexes were also carried out by DFT using the Gaussian 09 program, in which the B3LYP function was used. Based on experimental measurement and theoretical analysis, we can know that the combination ratio of the probe and Cu 2+ is 2:1 and the limit of detection (LOD) is as low as 5.3 × 10 −9 M Besides, the probe 1 was also used to analyze the Cu 2+ in living cells.
研究领域:
分析化学
·
生物化学
·
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）