TALANTA
·
2025
·
IF 6.1
Weiyi Bu,Yan Zhang,Dan Huang,You Zhou,Na Liu,Wenjiang Han,Xiaohong Chuai,Zhijie Zhou,Changhua Hu,Geyu Lu
Due to the unique physiochemical properties of ionic liquids, they are extensively used as agent or solvent in the synthesis process of nanomaterials. The tailored growth process of functional nanomaterials might result in performance modification for them. In this work, In 2 O 3 nanoparticles were prepared via the hydrothermal method and subsequent calcination (400°C, 500°C, 600°C and 700°C). An ionic liquid (1-hexadecyl-3-methylimidazolium chloride, [C 16 Mim] Cl) was introduced in the hydrothermal process. After calcination, trace of [C 16 Mim] Cl inclusion in In 2 O 3 was pyrolyzed with Cl residue (Cl-In 2 O 3 ). In compare with control sample synthesized without [C 16 Mim] Cl (pure In 2 O 3 ), In 2 O 3 -600 (Cl-In 2 O 3 calcinated at 600°C) exhibited an excellent UDMH sensing performance at 225°C. The fabricated sensor achieved a high response value (71.0 ± 2.1 to 100 ppm), rapid response time (2 s), good selectivity and a low theoretical limit of detection (1.72 ppb) to UDMH gas. Various characterizations, in regard to oxygen vacancy, surface texture structure, energy band structure and surface acidity, were utilized to analyze the cause for enhanced performance. The ionic liquid inclusion increases the contents of adsorbed oxygen species and improves the adsorption capacity to UDMH gas. This work indicates that the synthesized In 2 O 3 nanoparticles could be the potential candidates for rapid UDMH detection in some specific application scenarios.
研究领域:
材料科学
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化学传感器
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纳米技术
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xianghong Ren,Yizhi Zeng
Unsymmetrical dimethylhydrazine (UDMH), as a high-energy liquid rocket fuel widely used for space launches, inevitably produces huge volumes of UDMH wastewater during use. As UDMH and its byproducts are both highly toxic, this poses a major threat to the ecological environment and human body, making it an urgent need to develop an efficient, environmentally friendly treatment for UDMH wastewater. Photocatalysis is well recognized for being less costly and more environmentally friendly, yet as traditional photocatalysts are usually available in the form of powder, the photogenerated carriers cannot be well separated or effectively recycled. In this study, a composite photocatalyst featuring a three-dimensional core-shell array structure consisting of a TiO 2 crystal seed layer, a TiO 2 nanorod array core and a CeO 2 nanoparticle shell is created over the surface of recyclable carbon fiber by means of layer-by-layer loading. The TiO 2 rutile/anatase phase heterointerface and TiO 2 /CeO 2 heterointerface allow efficient separation and migration of photogenerated electrons and holes in the three-dimensional space. Under simulated solar irradiation, our new structure degrades 100 mg/L UDMH wastewater by up to 97.3 % within 240 min. More importantly, it shows good reusability and recyclability. Our research offers a practicable option for the efficient degradation of UDMH wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 5
·2993-3003
·
IF 3.9
YiZhi Zeng,Feng Zhou,Yuan Gao
In the present research, the preparation process parameters of TiO2 nanotube arrays (TNAs) prepared by anodic oxidation were systematically studied by the orthogonal experimental method for the first time. Herein, the parameters of nine factors were optimized; the optimal parameters were: the electrolyte was a 0.2 mol L−1 NaF solution with 3% vol H2O at pH 7, the anodic oxidation voltage was 40 V, the electrode spacing was 4 cm and the reaction was carried out for 60 minutes. The physicochemical properties of the materials were characterized by SEM, XRD, EDS, UV-vis, and PL spectroscopy. By electrodeposition of Bi2O3 modified TNAs, the degradation rate of unsymmetrical dimethylhydrazine (UDMH) wastewater on the TNAs-10 was 89.14% within 10 h, which was 2.69 times that on pure TNAs. A bias potential of +0.3 V (vs. open circuit potential) was applied to the modified TNAs-10. The degradation rate of UDMH was significantly enhanced on the TNAs-10 (bias) process as compared to the TNAs-10 process. The degradation rate of UDMH wastewater on TNAs-10 (bias) exhibited an exponential distribution. UDMH and its toxic by-products FDMH, NDMA were completely degraded after 8 h.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Linlu Shen,Hongyi Wang,Jing Kang,Jimin Shen,Pengwei Yan,Yingxu Gong,Jiaxu Zhang,Gang Fu,Shuyu Wang,Yizhen Cheng,Shengxin Zhao,Zhonglin Chen
In this study, the ultraviolet/peroxymonosulfate (UV/PMS) process was found to be an efficient and safe strategy for simultaneously controlling NDMA during the degradation of N,N-dimethylhydrazine compounds, such as 1,1,1′,1′-Tetramethyl-4,4′-(methylene-di-p-phenylene) disemicarbazide (TMDS). The distinct roles of sulfate radicals (SO 4 − ), hydroxyl radicals (HO ), PMS, and UV in TMDS degradation as well as NDMA formation and elimination, have been elucidated, involving the kinetics and multiple-path transformation mechanisms. Moreover, to assess the feasibility of this process, a comprehensive toxicity assessment of treated water for zebrafish embryos was conducted. Mineralization analysis and an assessment of electrical energy per order (EE/O) were performed on actual water samples. The results indicate that SO 4 − , HO , PMS, and UV together degraded TMDS, but only SO 4 − and PMS led to NDMA formation. UV irradiation may coordinate SO 4 − and HO to overcome the energy barriers of NDMA elimination by providing continuous energy. The degradation of TMDS involved hydroxylation, radical addition, bond cleavage and nitrosation. Notably, NDMA formation may be closely related to the electron transfer between SO 4 − or PMS and TMDS. Subsequently, the generated NDMA was controlled through photocleavage, radical addition, and hydroxylation. Additionally, the results of toxicity evaluation and EE/O analysis suggest UV/PMS is safe and has the potential for treating N,N-dimethylhydrazine compounds-containing water.
研究领域:
环境科学
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毒理学
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水处理工程
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产品关联
DOI
高影响因子
WORLD JOURNAL OF GASTROENTEROLOGY
·
2020
·
IF 3.665
Yu Wang,Hei-Ying Jin,Ming-Zhi Fang,Xiao-Feng Wang,Hao Chen,Shu-Liang Huang,De-Song Kong,Min Li,Xiu Zhang,Yu Sun,Shui-Ming Wang
BACKGROUND Epigallocatechin gallate (EGCG) is a polyhydroxy phenolic compound extracted from tea and its antitumor effect has received widespread attention. We explored the inhibitory effect of EGCG on dimethylhydrazine (DMH)-induced colorectal cancer (CRC) using a rat model, predicted the interaction between EGCG and CRC target genes using a database, and explained the EGCG associated target pathways and mechanisms in CRC. AIM To understand the inhibitory mechanisms of EGCG on CRC cell proliferation and identify its pharmacological targets by network pharmacology analysis. METHODS DMH (40 mg/kg, s.c., twice weekly for eight weeks) was used to induce CRC in rats. After model establishment, the rats were administered with EGCG (50, 100, or 200 mg/kg, p.o., once daily for eight weeks) and killed 12 and 20 wk after the start of the experiment. Formation of aberrant crypt foci and tumor was studied by histological analysis. Using network pharmacology analysis, candidate and collective targets of EGCG and CRC were identified, and Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes analyses were used to predict the pathways altered by EGCG. RESULTS At week 12, high-dose EGCG treatment significantly reduced the tumor formation rate, total number of tumors, cancerous and non-cancerous tumors, tumor volume, ascites formation, and aberrant crypt foci count. At week 20, all three doses of EGCG were effective. Seventy-eight collective targets of EGCG and CRC were identified, of which 28 genes were dysregulated in CRC. Kyoto Encyclopedia of Genes and Genomes and GO analyses showed that the dysregulated genes were enriched in hsa05210 (CRC), hsa04115 (p53 signaling pathway), and hsa04151 (PI3K-Akt signaling pathway), GO:0043124 (negative regulation of I-kappaB kinase/NF-kappaB signaling pathway), GO:0043409 (negative regulation of mitogen-activated protein kinase cascade), and GO:2001244 (positive regulation of intrinsic apoptotic signaling pathway) respectively. CONCLUSION EGCG inhibits the formation of DMH-induced CRC by regulating key pathways involved in tumorigenesis.
研究领域:
肿瘤学
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药理学
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分子生物学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Functional Foods
·
2018
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IF 3.47
Yaser Gamallat,Xiaomeng Ren,Williams Walana,Abdo Meyiah,Ren Xinxiu,Yanyan Zhu,Meiqi Li,Siyuan Song,Luhan Xie,Yazeed Jamalat,Mohammad Zubair Saleem,Yufang Ma,Yi Xin,Dong Shang
Lactobacillus rhamnosus (LGG) is well documented strain with wide clinical applications. We investigated herein the possible protection role of LGG in against early preneoplastic colon carcinogenesis Aberrant crypt foci (ACF) in rat model. Sprague Dawley rats were pre-treated with or without LGG via oral gavage, followed by ACF induction with Dimethylhydrazine (DMH). LGG treated groups showed significant decrease in total number of ACF’s, and increased Bax, P53, and Caspase-3 proteins expression with significant attenuation of NFkB, Cox2 and β catenin expression compared to DMH group. Serum cytokines array revealed significant elevation of IL-2, IL-6, and IFN-γ, and attenuated level of IL-10 in LGG+DMH treated animals. Finally, the 16S rRNA fecal microbiome genomic analysis showed that LGG alters the gut microbiome structure, composition and functions at phylum, family and genus level. Collectively, LGG reduces colon ACFs incidence and multiplicity via inhibition of pro-carcinogenesis biomarkers and modulate the gut microbiome.
研究领域:
胃肠病学
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微生物学
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肿瘤学
·
分子生物学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2018
·
IF 6.653
Ying Han,Jihe Wang,Jun Li,Zhonglin Chen,Weiwei Li,Beibei Jiang,Jie Yao
Copper corrosion products (Cu(OH)2, Cu2O, CuO and Cu2CO3(OH)2) were applied to catalyze the reduction of N-Nitrosodimethylamine (NDMA) with iron. All the copper corrosion products showed catalytic abilities. Lower pH values and DO concentrations facilitated NDMA reduction in most cases. 1,1-dimethylhydrazine (unsymmetrical dimethylhydrazine, UDMH) and dimethylamine (DMA) formed during the degradation of NDMA. There were also some undetected products. Catalytic hydrogenation was proposed as the mechanism. The catalytic systems did not promote the formation of hydrogen atoms. The dissolved copper ions in these systems were too sparse to enhance the reaction. The smooth iron surface and formation of Cu2O in each catalytic system explained the enhancement of NDMA removal. Different surface morphologies and states of Cu2O accounted for the differences in NDMA removal and kinetics between the reaction systems. This technique could be an alternative for NDMA reduction and could broaden the application of copper corrosion products.
研究领域:
环境科学
·
化学工程
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Ying Han,Xiaoping Zheng,Beibei Jiang,Yuling Tang,Hongyuan Liu,Kemin Zhang,Yaping Guo,Jun Li
The influencing factors, products and mechanism of N -nitrosodimethylamine (NDMA) reduction by zinc (Zn) in the presence of transition-metal ions (Mn 2+ , Co 2+ and Ni 2+ ), were investigated. The NDMA removal by Zn was significantly improved by them, and the promoting effect of Co 2+ and Ni 2+ were better than Mn 2+ . With the decrease of pH values and dissolved oxygen concentrations, the removals of NDMA were enhanced in all reaction systems. NDMA was mainly reduced to unsymmetrical dimethylhydrazine (UDMH) in Zn and Zn/Mn 2+ systems. It was mainly reduced to dimethylamine (DMA) and ammonium (NH 4 + ) in Zn/Co 2+ and Zn/Ni 2+ systems. There were undetected products in all reaction systems. Catalytic hydrogenation was the main mechanism, and active hydrogen atom was the main active species. The presence of Mn 2+ , Co 2+ and Ni 2+ promoted the corrosion of Zn and changed the surface morphology of Zn. The formation of type I film on Zn surface was promoted in the presence of Co 2+ and Ni 2+ , which was conducive to the continuous corrosion of Zn and hydrogen generation. While type II film which would inhibit the corrosion of Zn formed on Zn surface in the presence of Mn 2+ . MnO 2 , Co 3 O 4 and Ni(OH) 2 were formed in Zn/Mn 2+ , Zn/Co 2+ and Zn/Ni 2+ systems, respectively. They would facilitate more generation of active hydrogen atoms.
研究领域:
环境化学
·
水处理
·
催化
·
材料科学
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产品关联
DOI
高影响因子
CHROMATOGRAPHIA
·
2019
·Vol. 83
·期 1
·107-113
·
IF 1.552
Zhou Feng,Ren Xianghong,Du Siyan
Abstract Current methods for measurement of unsymmetrical dimethylhydrazine (UDMH) in wastewater suffer from a small detection range and complex pretreatment. In this study, ion chromatography (IC) with conductivity detection was used to directly analyze UDMH in wastewater, without any derivatization pretreatment, and the measurement range was as wide as 0.5–1000 μg·mL −1 . The effects of column temperature and sample pH on the detection were investigated. Furthermore, the chromatography conditions were optimized by combining the effects of different combinations of nitric acid, 2,6-pyridinedicarboxylic acid (PDCA), and methanesulfonic acid (MSA) on the analysis of mixed samples of UDMH and alkali metal ions. The linearity of the detected peak height ( H ) and peak area ( A ) versus UDMH concentration was studied at low, medium, and high concentrations. A good linear relationship was observed in the range of 0.5–1000 μg·mL −1 , especially for A , the relative standard deviation (RSD) and correlation coefficient ( R 2 ) of which were 0.077–1.653% and 0.9998–1.0000, respectively. In addition, the method showed good sensitivity with a limit of detection (LOD) of 0.05 μg·mL −1 and a limit of quantitation (LOQ) of 0.16 μg mL −1 . The precision and accuracy (expressed by recovery) were verified, where the RSD were less than 1.49% and 3.17%. Interference between hydrazines and alkali metal ions was discussed. Finally, actual UDMH samples were determined, confirming the applicability of the developed method for analyzing UDMH in wastewater during the degradation process. Graphic Abstract
研究领域:
环境化学
·
分析化学
·
废水处理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）