Journal of the Taiwan Institute of Chemical Engineers
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2021
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IF 5.876
Xuelian Li,Saleem Raza,Changkun Liu
Photocatalysis, in which carcinogenic compounds are decomposed into harmless products, is the most promising method for the eco-friendly degradation of wastewater pollutants. This study investigated a novel bio-based polymeric microsphere photocatalyst produced via the precipitation polymerization of widely available biomass-derived phenylpropenes trans-anethole (ANE) and N-phenylmaleimide (N-PMI). Amino-modified TiO 2 nanoparticles were grafted onto the surfaces of the microspheres, thereby producing Poly[ANE+N-PMI]-TiO 2 microspheres using photocatalysis. The microspheres were used as photocatalysts for the degradation of rhodamine B (RhB) dye and tetracycline (TC) antibiotics in wastewater, where 95% and 97% degradation rates were achieved for 50 mg·L -1 RhB and 100 mg·L -1 TC, respectively. The microsphere photocatalyst exhibited high stability and recyclability, and maintained excellent photocatalytic performance during continued cycling. Kinetic studies demonstrated that the photocatalytic degradation of RhB and TC proceeded according to a pseudo-first-order kinetics model. Furthermore, superoxide free radicals (·O 2 − ) and hydroxyl radicals (·OH) were the primary and secondary reactive species during photo-degradation. Overall, the excellent performance of the simple TiO 2 -based photocatalyst was clearly demonstrated, and its numerous advantages, such as low energy consumption, low cost, non-toxicity, and environmental friendliness, highlight its promising practical applications.
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JOURNAL OF BIOTECHNOLOGY
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2020
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IF 3.503
Yuan Yu,Wei Zhang,Qing-Tian Gong,Yan-Hong Liu,Zeng-Jie Yang,Wei-Xun He,Na Wang,Xiao-Qi Yu
Enzymes, which provide more efficient and eco-friendly strategies for various functional molecules’ construction than traditional chemo-catalysts, were utilized for the synthesis of 4H -pyrimido[2,1- b ] benzothiazole derivatives. Reported herein is a trypsin-catalysed three- component Biginelli reaction of aldehyde, β-ketoester and 2-amino benzothiazole in one pot, affording a streamlined pathway to diverse ring-fused pyrimidines. In addition to using commercially available aromatic aldehydes as substrates, acetaldehyde, the chemical liquid with rather low boiling point and difficult to handle above room temperature, is utilized to further extend the range of substrates. It was verified that most of the tested substrates exhibited satisfactory reactivity. In addition, several substrates indicated AIE (Aggregation-Induced Emission) property and have been investigated as potential biomarkers.
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高影响因子
ChemNanoMat
·
2021
·Vol. 7
·期 2
·200-206
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IF 3.154
Shuyu Zhou,Jianbing Zang,Wei Li,Pengfei Tian,Hongwei Gao,Shiwei Song,Xueqing Tian,Yanhui Wang
Graphical An in-situ derivatization-based nano-boron carbide strategy was proposed to produce B, N co-doped carbon electrocatalysts for oxygen reduction reaction. This strategy can produce B- and N-doped active sites while avoiding formation of B−N bonds, allowing electrocatalysts to exhibit excellent catalytic activities comparable to commercial Pt/C and better stability. Heteroatom-doped metal free carbon materials, especially boron and nitrogen co-doped carbons have been widely researched as promising oxygen reduction electrocatalysts because of their low cost, high activity and environmental friendliness. However, B, N-doped carbon electrocatalysts are usually prepared at high temperature and accompanied by the formation of B−N bonds resulting in the inactivation of the active sites. This paper proposed a strategy for synthesizing B and N co-doped carbons for oxygen reduction reaction in-situ derived from nano-boron carbide by one-step heat treatment at low temperature. This strategy can produce B- and N-doped active sites while avoiding formation of B−N bonds, allowing electrocatalysts to exhibit excellent catalytic activities ( E onset =0.93 V, E 1/2 =0.79 V) and better stability (current density remained 93.3% after 12,000 s) comparable to commercial Pt/C (20 wt%). New ideas were provided by this work to massively produce the B and N co-doped carbon electrocatalysts candidates for ORR.
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Environmental Technology & Innovation
·
2020
·
IF 3.356
Vu Thi Quyen,Le Thi Thu Ha,Dang My Thanh,Quyet Van Le,Nguyen Minh Viet,Nguyen Thi Nham,Phan Quang Thang
Advanced synthesis of nanoflower structures consisting of TiO 2 @Ti 3 C 2 nanoflowers with three-dimensional (3D) porous frameworks from two-dimensional (2D) Ti 3 C 2 MXene was done and applied for degradation of organic pollutant. The special structure of material was created by the in situ transformation, starting from Ti 3 C 2 T x MXene as provision of Ti source. The basis properties of material were characterized by SEM, TEM , XRD and XPS. The Ti 3 C 2 T x MXene showed layered structure and then this morphology was replaced by nanoflower spheres with rapid growth of TiO 2 @Ti 3 C 2 nanowhiskers. In terms of application, the TiO 2 @Ti 3 C 2 heterojunction showed an extraordinary photocatalytic efficiency toward Rhodamine B (RhB) compared to performances of pristine Ti 3 C 2 , and commercial TiO 2 . In addition, the TiO 2 @Ti 3 C 2 composite also displays the good recyclability even after 5th degradation cycles. Based on the finding, it gains a deeper insight into practical applications of 2D transition metal carbide for treatment of organic pollutants in wastewater.
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Frontiers in Cell and Developmental Biology
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2020
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IF 5.186
Zhang Shou-Xin,Ding Zhi-Ming,Ahmad Muhammad Jamil,Wang Yong-Sheng,Duan Ze-Qun,Miao Yi-Liang,Xiong Jia-Jun,Huo Li-Jun
Bisphenol B (BPB), a substitute of bisphenol A (BPA), is widely used in the polycarbonate plastic and resins production. However, BPB proved to be not a safe alternative to BPA, and as an endocrine disruptor, it can harm the health of humans and animals. In the present study, we explored the effects of BPB on mouse oocyte meiotic maturation in vitro. We found that 150 μM of BPB significantly compromised the first polar body extrusion (PBE) and disrupted the cell cycle progression with meiotic arrest. The spindle assembly and chromosome alignment were disordered after BPB exposure, which was further demonstrated by the aberrant localization of p-MAPK. Also, BPB exposure increased the acetylation levels of α-tubulin. As a result, the spindle assemble checkpoint (SAC) was continuously provoked, contributing to meiotic arrest. We further demonstrated that BPB severely induced DNA damage, but the ROS and ATP production were not altered. Furthermore, the epigenetic modifications were changed after BPB exposure, as indicated by increased K3K9me3 and H3K27me3 levels. Besides, the pattern of estrogen receptor α (ERα) dynamics was disrupted with a mass gathering on the spindle in BPB-exposed oocytes. Our collective results indicated that exposure to BPB compromised meiotic maturation and damaged oocyte quality by affecting spindle assembly and chromosome alignment, acetylation of α-tubulin, DNA damage, epigenetic modifications, and ERα dynamics in mouse oocytes.
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CHEMOSPHERE
·
2020
·
IF 5.778
Tianchan Zang,Hao Wang,Yinghao Liu,Li Dai,Shuang Zhou,Shiyun Ai
The disposal and management of waste sludge is a considerable challenge for environmental protection and resource utilization. Herein, sludge-based biochar material loaded with nano-Fe 3 O 4 (xS@Fe-y) was fabricated via hydrothermal carbonization process and employed as catalyst to activate peroxymonosulfate (PMS) for degrading organic dyes in wastewater. Benefiting from the proper iron content, porous structure and the good dispersibility of iron on the catalyst surface, the proposed 5S@Fe-500 catalyst not only exhibited excellent catalytic activity and durability in the activation of PMS to degrade Rhodamine B (RhB), which was almost completely removed in 10 min (50 mL 50 mg L −1 ), but also performed broad application prospects in pollutant degradation . More importantly, the free radical quenching test and electron spin-resonance spectroscopy (ESR) detection demonstrated that O 2 • - , SO 4 • - , OH and 1 O 2 were generated during the process of catalyst activation of PMS. Based on this, a possible reaction pathway for degrading RhB with the aid of 5S@Fe-500 was put forward. It is believed that this work offers a promising reuse method of converting the waste sludge to a high efficiency and low-cost nano magnetic catalyst to activate PMS for degrading refractory organic pollutants in aquatic surroundings.
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DYES AND PIGMENTS
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2020
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IF 4.613
Xueyan Liu,An Chen,Yuxin Wu,Chengyou Kan,Jianhong Xu
The stimulus-responsive P(MMA- co -BA- co -RhBUEA) latexes were prepared by miniemulsion polymerization of butyl acrylate (BA), methyl methacrylate (MMA), and a rhodamine-based probe RhBUEA. Their chemical composition and structures were characterized by FTIR and UV–Vis spectral analysis. Meanwhile, the effects of AIBN, SDS , and RhBUEA content on the miniemulsion polymerization and the morphology of latex particles were investigated. Based on the recipe of 30 mM SDS to the volume of water, 2 wt% AIBN and 5 wt% RhBUEA to the total monomers , the sensing properties of the resultant latex and its film were studied. Both the latex and the latex film displayed the noticeable color change, high sensitivity, superior selectivity, and anti-interference properties towards Fe 3+ over other metal ions in aqueous solution. The detection limits of the latex and the latex film were 0.122 and 0.208 μM, respectively. Furthermore, the film sensor exhibited good recyclability thanks to the off-on switch, possessing the potential as a portable and reversible chemosensor for the naked-eye detection of Fe 3+ .
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Applied Nanoscience
·
2020
·Vol. 10
·期 12
·4415-4426
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IF 2.88
Duan Jihai,Pan Peng,Xue Kang,Zhao Hui,Zhang Zisheng,Wang Weiwen
B-C-N-TiO 2 catalysts with intermediate band gap and heterojunction were prepared by sol–gel method. The crystal structure, elemental composition, and absorbance performance were analyzed by XRD, XPS and UV–vis DRS. Due to the formation of the continuous intermediate band gap in the forbidden band, the optical absorption boundary of B-C-N-TiO 2 catalyst extends to 412 nm, which shows different red shift compared with that of TiO 2 (397 nm), N-TiO 2 (400 nm), B-TiO 2 (402 nm) and C-TiO 2 (403 nm).Meanwhile, the B-C-N-TiO 2 catalyst is a uniform spherical solid particle with exposed (101) and (211) planes. The degradation efficiency of B-C-N-TiO 2 catalyst to methylene blue(MB) was up to 97.82% after 3 h under visible light, which shows different degree of improvement compared with that of TiO 2 (34.8%), N-TiO 2 (79.09%), B-TiO 2 (87.82%) and C-TiO 2 (73.19%). B-C-N-TiO 2 has good stability, and there was still more than 95% degradation efficiency after three degradation cycles. It is also revealed that the incorporation of B-C-N element affects the crystal phase of the catalyst and promotes the generation of heterophase surface heterojunction between (101) and (211). It has certain guiding value for co-doping modification of three elements.
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JOURNAL OF CONTROLLED RELEASE
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2020
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IF 7.727
Yanchao Liu,Yi Han,Ting Fang,Si-Min Chen,Xinyu Hu,Lijun Song,Hui Shen,Haiqing Dong,Yuan-Ying Jiang,Zui Zou,Yongyong Li,Mao-Mao An
As the gold standard treatment for invasive fungal infection , amphotericin B (AmB) is limited by its severe nephrotoxicity . It has been shown that AmB complex with albumin in vivo forms a sub-10 nm nanocomplex within kidney excretion size range and eventually induces the nephrotoxicity. This study presents an approach to take advantage of the “weakness” of such unique interaction between AmB and albumin to form AmB nanocomplex beyond the size range of kidney excretion. Herein, a novel strategy was developed by directly assembling molecular BSA into larger-sized nanostructures with the reconstructed intermolecular disulfide bond and hydrophobic interaction. The rich binding sites of AmB within BSA nanostructures enabled the efficient AmB loading and forming nanoparticle (AmB-NP) which exceeds the size range of kidney excretion (~ 60 nm). We found nanoassembly with BSA redirected biodistribution of AmB with a 2.8-fold reduction of drug accumulation in the kidney and significantly improved its renal impairment in mice. Furthermore, we found that nanoassembly with BSA significantly increased the biodistribution of AmB in brain and endowed it 100-folds increase in pharmacological effect against meningoencephalitis caused by common fungal pathogen Cryptococcus neoformans . Together, this study not merely overcomes the nephrotoxicity of AmB using its “weakness” by a nanoassembly method, and provides a new strategy for reducing toxicity of drugs with high albumin binding rate in vivo .
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CATALYSIS COMMUNICATIONS
·
2020
·
IF 3.612
Mingcai Yin,Jiangfan Sun,Yixian Li,Yimin Ye,Kaiyue Liang,Yaoting Fan,Zhongjun Li
MoS 2 is a promising catalyst for hydrogen evolution reaction, whereas the inherent defects of limited active sites for H 2 evolution and poor conductivity impede its practical application. Herein, low-cost and available activated carbon (denoted as C) was introduced and MoS 2 /C composite was prepared via a facile one-pot liquid-phased reaction. The MoS 2 /C exhibits an excellent photocatalytic hydrogen evolution activity (872.3 μmol/h) sensitized by Erythrosin B under LED light irradiation, which is about 1.8 times that of pure MoS 2 . Moreover, hydrogen evolution mechanism and reasons for the enhanced performance of MoS 2 /C were proposed based on the results of photoluminescence spectra and photoelectrochemical tests.
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2020
·Vol. 34
·期 6
·1408-1414
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IF 0.64
Zhang Chenxu,Wu Xiangfeng,Zhang Mi,Zhang Jiarui,Su Junzhang,Wang Yijin,Li Hui,Wang Chao,Wang Kaiyuan,Sun Guowen
SnO 2 /AgIO 4 hybrids were fabricated by an in-situ synthetic method at room temperature. The structure, morphology, light response range, separation efficiency of the electron-hole pairs and elements of the as-synthesized samples were characterized by adopting X-ray diffraction, scanning electron microscopy, UV-Vis diffuse reflectance spectroscopy, electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy, respectively. The synergistically photocatalytic degradation mechanism of the as-synthesized composites was also proposed. The experimental results reveal that under the visible light irradiation the as-synthesized SnO 2 /AgIO 4 hybrids can enhance the photocatalytic degradation efficiency of rhodamine B compared to pure samples. With increasing the molar ratios of AgIO 4 to SnO 2 , it displays the trend of first increasing and then decreasing. When it is 1:2 in 150 min, the as-prepared hybrids have the highest degradation efficiency of 93.1%, which increases by 6550.0%, 30.5%, and 1505.0% compared to those of pure SnO 2 , AgIO 4 , and TiO 2 (P25), respectively. Moreover, the Sn-O-Ag cross-linking bonds are formed at the interfaces of SnO 2 and AgIO 4 . In addition, superoxide anion radicals and holes play a major role in the process of photodegradation.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
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IF 4.939
Yongheng Yin,Hongbo Li,Hong Wu,Wei Wang,Zhongyi Jiang
Designing polymer chains which contain building blocks with well-defined dimension is an efficient method to induce microphase separation and regulate the ionic channels of polymer electrolyte membranes (PEMs). In this study, a Wells-Dawson-type polyoxometalate (POM) is synthesized and chemically bonded to a norbornene derivative to prepare poly (POM) blocks. Then the block copolymer poly (POM) 10 - b -poly (COOH) 300 is fabricated using poly (POM) and poly (COOH) blocks. Finally, the block copolymer is blended with sulfonated polysulfone (SPS). The electrostatic interactions between the block copolymer and SPS confer the blend membrane with enhanced mechanical and dimensional stabilities. Due to the homogenous distribution of POM clusters and the hydrophilic-hydrophobic interactions between POMs and polymer backbones , the adjacent hydrophilic domains are connected and continuous proton-transfer channels are induced. As a result, the blend membrane displays proton conductivity of 0.053 S cm −1 (25 °C, 100% RH) and 1.5 × 10 −2 S cm −1 (80 °C, 40% RH), which are 2.52 and 6.25 times higher than those of the plain SPS membrane. Furthermore, SPS/POM-BC-30 shows a maximum power density of 164.9 mW cm −2 , which is 54.7% higher than SPS.
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