CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Guo-Li Chen,Hui-Ye Jiang,Yan Jiang,Zhao-Peng Deng,Ying-Ming Xu,Li-Hua Huo,Shan Gao
The efficient and synchronous monitoring of diverse harmful gases by one portable sensor has recently become a hot topic due to the vast majority of reports for only sensing a given gas. Herein, two types of hollow microspheres cross-linked through γ-WO 3 nanosheets were controllably prepared by simple pyrolysis of commercial ammonium metatungstate (AMT). Among, the orange product obtained by air calcination at 400 °C is trace (NH 4 ) 0.33 WO 3 doped γ-WO 3 composite, and has broad mesoporous structure, rich oxygen vacancies and the synergistic catalysis of surface W 6+ Lewis acid. These unique factors help to promote the diffusion of gas molecules, expose more active sites for chemical reaction, increase the conductivity of sensitive material and modulate the state of surface adsorbed oxygen species, which in turn effectively improve its sensitive capability toward diverse noxious gases. The (NH 4 ) 0.33 WO 3 /WO 3 sensor achieves response values of 234 for 5 ppm NO 2 at low 50 °C and 170 for 100 ppm diisopropylamine (DIPA) at 170 °C. Meanwhile, it also displays low detection concentrations, good reversibility and moisture resistance, as well as practical detection for vehicle exhaust and prometryn. This is also the first report of a WO 3 -based sensor that can simultaneously achieve dual-detection of trace NO 2 and DIPA. Moreover, the temperature-tuned dual-response mechanism has also been discussed in detail.
研究领域:
材料科学
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环境监测
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传感器技术
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Dan Zhao,Xianfa Zhang,Wenjing Wang,Lili Sui,Chuanyu Guo,Yingming Xu,Xin Zhou,Xiaoli Cheng,Shan Gao,Lihua Huo
Real-time detection of herbicides has been a challenge for the application of metal oxide gas sensors. In this paper, we report the application of TiO 2 sensors with oxygen vacancies for the detection of isopropylamine . Spherical structure with oxygen vacancies was successfully prepared by a simple one-step hydrothermal method combined with ionic liquid as morphology regulator. The morphology and structure of the materials were analyzed using XRD, SEM and TEM. Further studies reveal that the oxygen vacancies in this material play an important role in the detection of isopropylamine. The sensor exhibits excellent selectivity, moisture resistance and long-term stability. The response is 61.7–100 ppm isopropylamine, along with fast response time of 22 s. It is noteworthy that the lower limit of detection for isopropylamine can reach 0.2 ppm, which is very meaningful to practical application of detecting gas residues. The excellent performance can primarily be attributed to the formation of abundant oxygen vacancies into the material, which increases the adsorption capacity of gas molecules. This new sensing design strategy offers a vital reference to extend the application of non-metallic elements doped metal oxide semiconductors .
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Yue Zhou,Fangbin Lin,XiaoDong Wang,Hui Wang,Bingchun Xue
The development of adsorbents with high adsorption capacity and wide adaptable pH range was crucial to effectively controlling of water environment pollution. In this study, three-dimensional porous chitosan gel microspheres loaded with Ni and La (Ni-La-CS) were prepared for the adsorption of excessive phosphorus. The performance was investigated using glyphosate isopropylamine salt (GIS) and KH 2 PO 4 , which were selected as representative substances for organic and inorganic phosphorus. Results showed that Ni-La-CS exhibited high phosphorus removal efficiency with wide adaptable pH range. The adsorption process was monomolecular layer chemisorption , and the adsorption was spontaneous and endothermic. The coexistence of F − promoted the adsorption of phosphorus, while Cl − , SO 4 2− , CO 3 2− and HCO 3 − inhibited the adsorption. The material retained stability even after 5 cycles and the actual phosphorus-containing wastewater with 3.13 mg·L −1 could be treated to meet Chinese first-class standard.
研究领域:
环境科学
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材料科学
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水处理技术
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Ji Li,Ruoqi Xiao,Xiaoli Cheng,Xianfa Zhang,Yingming Xu,Lihua Huo
The effective detection of diisopropylamine gas is one of great significance in industrial production and human health. In this study, the availably detect of diisopropylamine gas was achieved by constructing CoMoO 4 /MoO 3 materials. The CoMoO 4 /MoO 3 sensor has highly selective diisopropylamine (S=87.6–10 ppm diisopropylamine) at 170 °C, with a response time of only 5.3 s. The lowest detection limit of the sensor is 5 ppb, which is the lowest detection limit in diisopropylamine gas sensors to date. Meanwhile, the CoMoO 4 /MoO 3 sensor also shows perfect diisopropylamine gas selectivity, moisture resistance, and long-term stability. Based on the advantages of p-n heterostructures and the synergistic effect of 2D nanosheets , CoMoO 4 /MoO 3 materials exhibits excellent diisopropylamine gas sensing properties. This work provides useful guidance for constructing of high-performance diisopropylamine sensors in the future.
研究领域:
材料科学
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传感技术
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环境监测
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DOI
高影响因子
ENZYME AND MICROBIAL TECHNOLOGY
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2024
·
IF 3.4
Puhong Yi,Mengdan Liu,Yuhua Hao,Ziwen Wang,Hanlin Liu,Xue Cai,Feng Cheng,Zhiqiang Liu,Yaping Xue,Liqun Jin,Yuguo Zheng
L-phosphinothricin (L-PPT) is the most popular broad-spectrum and highly effective herbicide. Transaminases (TAs) play a pivotal role in asymmetric synthesis of L-PPT, yet encounter the challenge of unfavorable reaction equilibrium. In this study, the novel dual transaminases cascade system (DTCS) was introduced to facilitate the synthesis of L-PPT. The specific amine transaminase BdATA, originating from Bradyrhizobium diazoefficiens ZJY088, was screened and identified. It exhibited remarkable activity, good stability, and required only 2.5 equivalents of isopropylamine to transform pyruvate effectively. By coupling BdATA with previously reported SeTA to construct the DTCS for pyruvate removal in situ , the L-PPT yield escalated from 37.37% to 85.35%. Three advantages of the DTCS were presented: the removal of pyruvate alleviated by-product inhibition, the use of isopropylamine reduced reliance on excess L-alanine, and no demand for expensive cofactors like NAD(P)H. It demonstrated an innovative idea for addressing the challenges associated with transaminase-mediated synthesis of L-PPT.
研究领域:
生物催化
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酶工程
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化学生物学
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药物化学
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DOI
PubMed
高影响因子
Frontiers of Environmental Science & Engineering
·
2023
·Vol. 18
·期 3
·1-10
·
IF 6.4
Zhang Yuyao,Jia Litao,Zhao Jin,Liu Xuming,Dong Shuyu,Liu Chuanyang,Cui Yuanyuan
The feasibility of simultaneous water recovery, salt separation and effective descaling of hypersaline brine was investigated by diisopropylamine (DIPA)-based directional solvent extraction (DSE), using diluted/concentrated seawater with initial saline concentration range of 12–237 g/L at extraction temperatures of 5 and 15 °C, respectively. The water recovery shows an obvious boundary at saline concentration of 115 g/L under dual effect of specific water extraction efficiency and extraction cycles. High Cl − ion concentration in product water is in sharp contrast to the nearly complete removal of SO 4 2− and hardness ions, indicating that DIPA-based DSE process indeed achieved efficient separation and purification of Cl − ion from hypersaline brines. Especially, the radical precipitation of Mg 2+ and Ca 2+ ions in form of Mg(OH) 2 and CaCO 3 demonstrates effective descaling potential, although it leads to more DIPA residues in dewatered raffinate than product water. Moreover, an exponential correlation between the Cl − removal efficiency and specific water extraction efficiency further reveals the intrinsic relationship of water extraction process and transfer of Cl − ion to the product water. Overall, the study provides a novel approach for integrating the water recovery and separation of Cl − ion from ultra-high-salinity brines with radical precipitation of Mg 2+ and Ca 2+ ions in one step.
研究领域:
化学工程
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环境科学
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分离技术
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水处理
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海水淡化
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DOI
高影响因子
RSC Advances
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2023
·Vol. 13
·期 41
·28931-28939
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IF 3.9
Guoqing Li,Zhiyi Zhang,Wenhao Xiao,Tongtong Wu,Jinbao Xu
The broad application of polyacrylamides (PAMs) has greatly promoted the development of new synthetic methods to prepare PAM-based functional (co)polymers regarding their traditional preparation via the direct polymerization of various acrylamide monomers. Herein, we have explored the post-polymerization modification of the poly(2,2,2-trifluoroethyl acrylate) (PTFEA) homopolymer, a typical non-activated ester, and various amines using the organo-catalytic system involving 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) and 1,2,4-triazole (TA). The reaction kinetics (e.g., the optimized reaction solvent, temperature, time, initial molar ratio of amines to esters and the molar ratio of DBU to TA) were carefully studied with the modulus substrate of iso-propylamine as the formed poly(iso-propyl acrylamide) (PNIPAM) representing the most investigated PAM. The full and partial amidation of the esters in PTFEA could be precisely regulated just by controlling the kinetic conditions to give (co)polymers with designable compositions and structures. We have demonstrated that the poly(N-acryloyl pyrrolidine) obtained by the post-polymerization modification of non-activated ester and pyrrolidine exhibited a noticeable phase transition, which confirmed the robustness and versatility of the post-polymerization modification. The described method paves the way for the synthesis of various (co)polymers with amide side chains from readily available polymer precursors.
研究领域:
高分子化学
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材料科学
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有机化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhichao Kang,Xuerong Han,Chenxu Wang,Hongwen Yu
Combined organic pollutants pose common and serious threats to the global eco-environment. Dibutyl phthalate (DBP) and atrazine (ATZ) are major toxic organic pollutants. However, there are no microorganisms capable of simultaneously removing these two organic pollutants from aquatic systems. An artificial microbial consortium has been considered a promising approach to achieve high removal efficiencies of DBP and ATZ. Therefore, the DBP and ATZ degrading strains, namely Rhodococcus KD0901 and Paenarthrobacter sp. KN0901, were co-cultured in this study based on the metabolic division of labor (MDOL) to construct a KDN0901 consortium. The constructed KDN0901 consortium simultaneously degraded 100 mg·L -1 and 30 mg·L -1 of DBP and ATZ, respectively, within three days of incubation at 15 °C. In addition, KDN0901 showed high adaptability to different pH and temperature conditions, from 5 to 9 and from 4 °C to 35 °C, respectively, especially at low temperatures. According to the constructed cross-feeding model using metabolic analyses, KD0901 provided KN0901 with n-butanol, while KN0901 provided KD0901 with ethylamine and isopropylamine. In this study, DBP and ATZ resulted in serious toxicity in soybean ( G. max ) plants, negatively affecting the growth, photosynthesis, and oxidative stress of the plants. However, the length and biomass of the plants increased by 33.3 % and 273.7 %, respectively, following the KDN0901 treatment, demonstrating the effectiveness of KDN0901 in mitigating the combined toxicity of DBP and ATZ. This study provided an effective, economical, and eco-friendly approach to promoting highly efficient and simultaneous bioremediation of DBP and ATZ-related pollution, especially in cold areas.
研究领域:
环境科学
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微生物学
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DOI
高影响因子
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
·
2024
·
IF 2.5
He Liu,Qian Gao,Kaiyue Zhang,Meng Xu,Hualei Wang,Dongzhi Wei
( R )-selective transaminases have the potential to act as efficient biocatalysts for the synthesis of important pharmaceutical intermediates. However, their low catalytic efficiency and unfavorable equilibrium limit their industrial application. Seven ( R )-selective transaminases were identified using homologous sequence mining. Beginning with the optimal candidate from Mycolicibacterium hippocampi , virtual mutagenesis and substrate tunnel engineering were performed to improve catalytic efficiency. The obtained variant, T282S/Q137E, exhibited 3.68-fold greater catalytic efficiency ( k cat / K m ) than the wild-type enzyme . Using substrate fed-batch and air sweeping processes, effective conversion of 100 mM 4-hydroxy-2-butanone was achieved with a conversion rate of 93 % and an ee value > 99.9 %. This study provides a basis for mutation of ( R )-selective transaminases and offers an efficient biocatalytic process for the asymmetric synthesis of ( R )-3-aminobutanol.
研究领域:
生物化学
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酶工程
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合成生物学
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产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Yizhen Zhang,Yu-Cai He,Cuiluan Ma
Lignin is a plentiful and readily accessible renewable resource. Vanillylamine is a crucial raw material used to synthesize pharmaceuticals and high-value furan compounds that can be acquired by aminating lignin-derived vanillin (Van). However, effectually achieving the biocatalytic synthesis of vanillylamine has remained challenging. In this study, a dimethyl sulfoxide (DMSO)-H 2 O (1:9, vol/vol) bioreaction medium was constructed, and a recombinant E. coli ATA1012 carrying ω-transaminase from Caulobacter sp. D5 was used as the ω-transaminase biocatalyst to acquire the effectual biocatalytic synthesis of vanillylamine. Under optimized bioreaction conditions (37 ℃ and pH 7.5) by supplementary of isopropylamine (IPA) (Van/IPA = 1:5, mol/mol), 80–100 mM Van could be effectually converted by ATA1012 whole cells in DMSO-H 2 O (1:9, vol/vol) within 12 h, yielding 91.2 %–95.4 % vanillylamine, with >99 % selectivity. An efficient amination process was developed using ATA1012 with superior transaminase catalytic activity and substrate tolerance to effectively convert Van to vanillylamine in a DMSO-H 2 O medium.
研究领域:
生物技术
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生物化学
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有机化学
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药学
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DOI
PubMed
高影响因子
Polymers
·
2024
·Vol. 16
·期 7
·990
·
IF 4.7
Kang Yang,Di Liu,Lei Feng,Liugen Xu,Yangang Jiang,Xiran Shen,Amjad Ali,Jianwei Lu,Li Guo
The development of nontoxic and efficient antifreeze agents for organ cryopreservation is crucial. However, the research remains highly challenging. In this study, we designed and synthesized a series of peptoid oligomers using the solid-phase submonomer synthesis method by mimicking the amphiphilic structures of antifreeze proteins (AFPs). The obtained peptoid oligomers showed excellent antifreeze properties, reducing the ice crystal growth rate and inhibiting ice recrystallization. The effects of the hydrophobicity and sequence of the peptoid side chains were also studied to reveal the structure–property relationship. The prepared peptoid oligomers were detected as non-cytotoxic and considered to be useful in the biological field. We hope that the peptoid oligomers presented in this study can provide effective strategies for the design of biological cryoprotectants for organ preservation in the future.
研究领域:
材料科学
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生物技术
·
低温生物学
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产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 6
·e06681
·
IF 2.3
Lirong Guo,Huijuan Shao,Haonan Fan,Baohang Xing,Yating Wang,Tao Jiang
In recent years, many researchers have studied the influence of modifying components on catalytic performance by adding them to ethylene oligomerization systems. This paper studied the effect of eight phosphine-containing modifiers on the catalytic performance of the chromium-based silicon-bridged diphosphine (PNSiP)/methylaluminium system. Modifiers like diethylchlorophosphine oxide, diphenylchlorophosphine oxide, triphenylphosphine, trimethylphosphine, triethylphosphine, phosphorus trichloride, diphenylphosphine chloride, and diisopropyl phosphorus chloride showed a significant influence on the catalytic activity of the catalytic system and the selectivity of 1-octene. When the molar ratio of diethylchlorophosphine oxide to chromium increased to 0.6, the catalytic activity increased from 7.39 × 10 6 to 11.75 × 10 6 g/ (mol Cr·h), exhibiting the most remarkable promotional effect. When the molar ratio of diphenylphosphine chloride to chromium increased to 0.6, the selectivity of 1-octene increased by 11.89%. Based on the results of electron paramagnetic resonance (EPR) and ultraviolet–visible spectrum (UV–Visible) analysis, we inferred that diethylchlorophosphine oxide was coordinated with the chromium active center through a phosphine-oxygen bond, which improved the catalytic activity of the reaction system. Furthermore, a possible reaction path between diethylchlorophosphine oxide and the chromium active center has been proposed, which is expected to provide a more economical and feasible strategy for the optimization of selective ethylene tetramerization systems. Graphical Eight phosphine-containing modifiers were examined in the Cr/PNSiP/MMAO catalyst system. Several modifiers markedly influenced both the catalytic activity and the selectivity toward 1-octene. Among them, diethylchlorophosphine oxide exhibited the most pronounced promotional effect. Electron paramagnetic resonance (EPR) and ultraviolet–visible (UV–Vis) spectroscopic analyses revealed that diethylchlorophosphine oxide coordinated to the chromium active center, thereby enhancing catalytic performance and providing valuable insights for catalyst optimization.
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高影响因子
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