Nano Energy
·
2019
·
IF 15.548
Chong Chen,Fumin Li,Liangxin Zhu,Zhitao Shen,Yujuan Weng,Qiang Lou,Furui Tan,Gentian Yue,Qingsong Huang,Mingtai Wang
The defects in perovskite crystals and the penetration of moisture/oxygen into the perovskite layer are major problems for perovskite solar cells (PSCs) to achieve long-term stability and high power conversion efficiency (PCE). However, there is still a lack of multifunctional passivation materials to solve these problems. Herein, for the first time, we report oleyl amine-coated PbSO 4 (PbO) 4 quantum-dots (QDs), as a passivation material with dual functions to simultaneously passivate the surface defects and block the penetration of moisture/oxygen into the perovskite layer for stable and efficient PSCs. The PbSO 4 (PbO) 4 QDs significantly reduce the defect density of the as-prepared CH 3 NH 3 PbI 3 films by passivating under-coordinated Pb ions and I anions and effectively enhance charge extraction efficiency at the TiO 2 /CH 3 NH 3 PbI 3 and CH 3 NH 3 PbI 3 /spiro-OMeTAD interfaces. Moreover, the hydrogen bond between H atoms of the OA and I atoms of the perovskite and the interface electric field at CH 3 NH 3 PbI 3 /OA interface also contribute to the improvement of efficiency and stability of PSCs. Finally, higher PCE (20.02%) is achieved by the PSCs with OA-coated PbSO 4 (PbO) 4 QDs compared to that (16.86%) of the PSCs without OA-coated PbSO 4 (PbO) 4 , corresponding to a 18.7% enhancement. Moreover, the PSCs with OA-coated PbSO 4 (PbO) 4 QDs maintain 90% of initial efficiency after operation for 280 h, indicating better stability than the PSCs without PbSO 4 (PbO) 4 QDs.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Guangping Lei,Yang Lu,Zihan Liu,Yayun Zhang,Guojun Xi,Huiyuan Cheng,Wenji Rao,Xuhuan Guo
The greenhouse effect associated with excessive CO 2 emission has led to a series of environmental issues, thus developing excellent adsorbents for CO 2 capture from flue gas offers a sustainable approach. To combine the merit of multiple functional components, novel FeTPP@MIL-101(Cr) was prepared by incorporation of 5,10,15,20-tetrakis(4-methylphenyl)porphyrinato iron (III) chloride (FeTPP) into MIL-101(Cr) cages via in-situ packaging strategy. The cage-confined FeTPP can both regulate the pore structures of MIL-101(Cr) and provide additional binding sites for CO 2 adsorption. Profiting from extra interactions for CO 2 component and the “sieving effect” for N 2 component induced by incorporation of FeTPP, the discrepancy of isosteric heat for CO 2 and N 2 was largely amplified. Notably, the CO 2 /N 2 selectivity (15/85, v / v ) calculated by ideal adsorbed solution theory (IAST) increased from 17.1 (MIL-101 (Cr)) to 41.8 (FeTPP@MIL-101 (Cr) with FeTPP loading of 4.98 wt%) at 273 K, 100 kPa, which is 2.44 times larger than that of pristine MIL-101 (Cr) and also exceeds most reported adsorbents.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 35
·19091-19106
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IF 11.9
Xiaoyun Chen,Pengkun Zhang,Dong-Hau Kuo,Qinhan Wu,Adugna Boke Abdeta,Binghong Wu,Zhengjie Su,Longyan Chen,Osman Ahmed Zelekew,Jinguo Lin
Herein, we demonstrated S2− anion incorporation into BiVO4 for converting an oxidative-type BiVO4 photocatalyst into a reductive-type BiV(S,O)4−x (labeled BiVOS) sulfo-oxide photocatalyst for efficient N2 fixation under an ambient environment. BiVOS-2 not only exhibited the highest NH3 production rate of 563.6 μmol g−1 h−1 without sacrificial agents and with durable stability but also had an apparent quantum efficiency (AQE) of 2.18% at 420 nm and a solar-to-ammonia (STA) conversion efficiency of 0.071% in pure water under AM1.5G light irradiation. At the same time, the sulfur-free BiVO4 can't realize N2 to NH3 conversion. The S2− doping introduced Vo, which converted V5+ around Vo into V4+ to keep the electrical neutrality. The active atoms V4+ were exposed and activated N2, and the electron hopping between V5+ and V4+ improved electron transfer. Density functional theory (DFT) calculation indicates that S2− anion doping can enhance adsorption energy, elongate the NN bond of the adsorbed N2 molecule, and facilitate electron transfer to the antibonding orbital of the N2 molecule, leading the BiVOS sulfo-oxide catalyst to have excellent N2 fixation activity. This study provides a promising method for converting an oxidative-type catalyst into a reductive catalyst to extend material applications.
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JOURNAL OF MOLECULAR LIQUIDS
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2023
·
IF 6
Chunjuan Huang,Ganbing Yao
Equilibrium mole fraction solubility of 2-amino-4-chloro-6-methoxypyrimidine in methanol/ethanol/acetone/ N,N -Dimethylformamide (DMF) plus water was experimentally measured by isothermal saturation method at 278.15–323.15 K under 101.2 kPa. The mixed solvents with low moisture and high temperature played a supportive role in the dissolution of 2-amino-4-chloro-6-methoxypyrimidine. The amount of 2-amino-4-chloro-6-methoxypyrimidine dissolved in DMF + water was more than that in other three systems and the ranges of values for the solubility (mole fraction) of 2-amino-4-chloro-6-methoxypyrimidine in methanol/ethanol/acetone/DMF + water were 0.0002046–0.009616, 0.0002046–0.01060, 0.0002046–0.04918 and 0.0002046–0.1197, respectively. The Jouyban-Acree (JA), Apelblat-Jouyban-Acree (AJA) and van’t Hoff-Jouyban-Acree (VJA) model were applied to calculate the solubility data of 2-amino-4-chloro-6-methoxypyrimidine in mixtures. The preferential solvation parameter δx 1,3 > 0 in 0.32 < x methanol < 1, 0.24 < x ethanol < 1, 0.21 < x acetone < 1 and 0.19 < x DMF < 1, the 2-amino-4-chloro-6-methoxypyrimidine was preferentially dissolved by cosolvents and the 2-amino-4-chloro-6-methoxypyrimidine was dissolved preferentially by water within δx 1,3 < 0. What’s more, the interaction between solute - solvent molecules and the internal interaction of molecules was analyzed by extend Hildebrand solubility approach (EHSA) and in the concentration range with W > δ 1+2 δ 3 , the hydrophobic groups in the 2-amino-4-chloro-6-methoxypyrimidine played a dominant role, while in other ranges self associations of solute, solvent or both were observed. The dissolution thermodynamic properties were obtained by van’t Hoff plots and the ranges of values for Δ sol H o (kJ∙mol −1 )/ Δ sol G o (kJ∙mol −1 )/ Δ sol S o (J∙mol −1 ) were 9.74 – 31.12, −17.84 – 4.96 and 33.79 – 161.89.
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JOURNAL OF ETHNOPHARMACOLOGY
·
2023
·
IF 5.4
Danilo de Souza Costa,Carla Monteiro Leal,Rayssa A. Cajas,Matheus Coutinho Gazolla,Lívia Mara Silva,Lara Soares Aleixo de Carvalho,Bruna L. Lemes,Renato Oliveira de Moura,Juliana de Almeida,Josué de Moraes,Ademar A. da Silva Filho
Ethnopharmacological relevance Roots of Pothomorphe umbellata (L.) Miq. are used in traditional medicine of Africa and South America for the treatment of malaria and helminthiasis . However, neither P. umbellata nor its isolated compounds have been evaluated against Schistosoma species. Aims of this study To investigate the antischistosomal effects of P. umbellata root extracts and the isolated compound 4-nerolidylcatechol (4-NC) against Schistosoma mansoni ex vivo and in murine models of schistosomiasis. Materials and methods The crude hydroalcoholic (PuE) and hexane (PuH) extracts of P. umbellata roots were prepared and initially submitted to an ex vivo phenotypic screening against adult S. mansoni . PuH was analyzed by HPLC-DAD, characterized by UHPLC-HRMS/MS, and submitted to chromatographic fractionation, leading to the isolation of 4-NC. The anthelmintic properties of 4-NC were assayed ex vivo against adult schistosomes and in murine models of schistosomiasis for both patent and prepatent S. mansoni infections. Praziquantel (PZQ) was used as a reference compound. Results PuE (EC 50 : 18.7 μg/mL) and PuH (EC 50 : 9.2 μg/mL) kill adult schistosomes ex vivo . The UHPLC–HRMS/MS analysis of PuH, the most active extract, revealed the presence of 4-NC, peltatol A, and peltatol B or C. After isolation from PuH, 4-NC presented remarkable in vitro schistosomicidal activity with EC 50 of 2.9 μM (0.91 μg/mL) and a selectivity index higher than 68 against Vero mammalian cells, without affecting viability of nematode Caenorhabditis elegans . In patent S. mansoni infection, the oral treatment with 4-NC decreased worm burden and egg production in 52.1% and 52.3%, respectively, also reducing splenomegaly and hepatomegaly . 4-NC, unlike PZQ, showed in vivo efficacy against juvenile S. mansoni , decreasing worm burden in 52.4%. Conclusions This study demonstrates that P. umbellata roots possess antischistosomal activity, giving support for the medicinal use of this plant against parasites. 4-NC was identified from P. umbellata roots as one of the effective in vitro and in vivo antischistosomal compound and as a potential lead for the development of novel anthelmintics.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Qiu-feng Lan,Wen-chang Wang,Xiao-hui Chen,Zhi-dong Chen
The poly(3-amino-4-hydroxybenzenesulfonic acid)/Ru(bpy) 3 2+ modified glassy carbon electrode (PAHBS/Ru(bpy) 3 2+ /GCE) is a novel solid-state electrochemiluminescence (ECL) sensor. It was prepared by electropolymerization of 3-amino-4-hydroxybenzenesulfonicacid (AHBS) followed by soaking into Ru(bpy) 3 2+ solution. Ru(bpy) 3 2+ was entrapped on the electrode via the electrostatic interactions between sulfonic acid groups and Ru(bpy) 3 2+ cation. The morphology and composition of the modified electrodes were analysed using scanning electron microscope and energy-dispersed spectrum. Cyclic voltammetry and electrochemical impedance spectroscopy were used to compare the electrochemical behavior of the electrodes before and after modification. Under the optimal conditions, the ECL intensity of the quenching value (ΔECL) versus the logarithm of the concentration of malachite green (MG) was linear over a concentration range from 5.0 × 10 -8 to 1.0 × 10 -5 mol L -1 ( r = 0.9931) and the limit of detection (LOD) was 2.5 × 10 -8 mol L -1 . This method has been successfully applied to the determination of MG in pond water.
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GREEN CHEMISTRY
·
2023
·Vol. 25
·期 11
·4565-4576
·
IF 9.8
Tihang Liu,Jiangang Wang,Hongyou Cui,Jinghua Wang
1,1,2-Trialkoxyethanes (TriAE) are a class of value-added chemicals that are desirably derived from biomass-derived sugars. However, it has been a big challenge to efficiently and selectively break the C–C bond in hexose to synthesize TriAE. In this study, a series of metal salts of phosphotungstic acid (HPW) were prepared to catalyze several biomass-derived sugars. The effects of the atomic ratio of Cs/H in CsxH3−xPW12O40 (x = 1–3), the reaction temperature, and the reaction time were highlighted. The influences of different biomass-derived sugars (glucose, fructose, mannose, cellulose disaccharide, and cellulose) and different alcohols (methanol, ethanol, 1-propyl alcohol, 2-propyl alcohol, and 1-butanol) were also investigated. It was found that alkali and alkaline earth metal monohydrogen salts of HPW were effective catalysts and the stronger the alkalinity of the metal elements, the higher the catalytic activity. Cs2HPW showed the best activity in catalyzing the conversion of glucose to TriAE via [2 + 4] retro-aldol condensation and as high as 88.44% yield of 1,1,2-trimethoxyethane and 72.56% yield of 1,1,2-triethoxyethane were achieved when reacting in methanol and ethanol, respectively. The catalyst deactivation was due to the coking coverage over the active sites rather than the leaching loss of the active components. This research provides new insights into the selective cleavage of the C2–C4 bonds in hexose and a novel approach to biomass-derived sugar valorization.
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ENVIRONMENTAL POLLUTION
·
2018
·
IF 4.358
Chen Wang,Jing An,Yingchen Bai,Hui Li,Haibo Chen,Dong Ou,Yongdi Liu
Tris(1,3-dichloro-2-propyl) phosphate (TDCPP) has been frequently detected in environmental media and biological samples. However, knowledge of its adverse health consequences is limited. In the current study, Caenorhabditis elegans ( C. elegans , L1 larvae) were exposed to TDCPP at environmentally relevant concentrations (control, 0.1, 1, 100 and 1000 μg L −1 ) for 72 h to explore any association between TDCPP and the aging process. Some of the degenerative age-related indicators were observed, including locomotion behaviors and lifespan. As crucial biomarkers of aging, the accumulation of lipofuscin, and lipid peroxidation (LPO) products exemplified by 4-hydroxynon-2-enal (4-HNE) were detected. This product forms as a result of oxidative stress , as confirmed by an N-acetyl-L-cysteine (NAC) pharmacological assay. Moreover, a significant increase in reactive oxide species (ROS) production in a dose-dependent manner using a fluorescent probe was observed. For the underlying molecular mechanism of the above aging phenotypes, significantly upregulated transcription of genes related to antioxidant systems, especially a subset of glutathione S-transferase ( gst-5, gst-6, gst-9, gst-10, gst-19, gst-24, gst-26, gst-29, gst-33, and gst-38 ), was found by RNA-Seq and further confirmed by RT-qPCR. The elevated glutathione S-transferase (GST) was attributed to the significant increase in 4-HNE because mutations in gst-5 and gst-24 inhibited the conjugation of GSTs with 4-HNE. Therefore, GST play an indispensable role in the detoxification process of TDCPP exposure and further confirmed LPO accumulation at the molecular mechanism level. In conclusion, TDCPP accelerated the aging process induced by the LPO products, 4-HNE, response to reactive oxidative species in C. elegans .
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MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 8
·1-8
·
IF 5.479
Chen Ya-Shun,Xiao Hua-Ming,Wang Tian-Qi,Yu Lei,Feng Yu-Qi
A MALDI-TOF mass spectrometric method is described for the determination
of small molecule compounds with cis-diol. It is based on the use of a binary matrix
consisting of boron nitride (BN) and α-cyano-4-hydroxycinnamic acid that was
modified with the derivatization reagent of (3-(acridin-9-ylamino)phenyl)boronic
acid which can recognize cis-diols. The binary matrix is used for
desorption/ionization (DI) in the positive ion mode. The mechanism leading to DI
enhancement was investigated. The results imply that BN is beneficial for the DI
because it induces an enhancement in the positive ion mode. The boronic
acid-functionalized binary matrix was successfully applied to capture the glucose,
shikimic acid and quinic acid. The method was applied to the determination of
3-chloro-1,2-propanediol in plant oil.
Schematic representation of a method for detecting the
cis-diol compounds on matrix assisted laser desorption/ionization
time-of-flight mass spectrometry (MALDI-TOF MS) using the binary
matrix of boron nitride (BN)/α-cyano-4-hydroxycinnamic acid (CHCA)
that was modified with (3-(acridin-9-ylamino)phenyl) boronic acid
(AYPBA).
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PHYSICS AND CHEMISTRY OF LIQUIDS
·
2019
·
IF 1.526
Mengsha Cai,Zhaoshan Liu,Haiyun Sun,Yongsheng Guo,Wenjun Fang
Densities (ρ) and viscosities (η) of a ternary system cyclopropanemethanol (1) + 2,2,4-trimethylpentane (2) + decalin (3) and three corresponding binary systems were measured at temperatures from 293.15 K to 323.15 K and atmospheric pressure. Densities were obtained by using a vibrating-tube densimeter. Viscosities were determined by an automatic microviscometer based on the rolling ball principle. The excess molar volumes (VmE) and viscosity deviations (Δη) of the ternary system were derived from the experimental data and then were fitted to Clibuka, Nagata–Tamura and Redlich–Kister equation, respectively. The binary subsystems were correlated by Redlich–Kister equation. The values of VmE and Δη were used to discuss the nature of mixing behaviours between mixture components.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Jing Chen,Yunjing Gao,Qin Ma,Xiaoyan Hu,Yali Xu,Xiaoquan Lu
In the present work, the classical synthesis method of 5,10,15,20-(4-sulphonatophenyl) porphyrin (TPPS 4 ) was improved. The synthesis process became more environmentally friendly, and the yield was increased by 10%. We constructed a sensitive fluorescent sensor for detection hydrogen peroxide (H 2 O 2 ) and glucose (C 6 H 12 O 6 ) by using the hyperfluorescence of TPPS 4 . The TPPS 4 -Fe 3+ complex system of the sensor could generate electron transfer process (ET) in the process of hydrogen peroxide (H 2 O 2 ) and glucose oxidation, which quenched the TPPS 4 fluorescence. The system had a linear range of 0–42 μM for hydrogen peroxide, and the minimum detectable limit (LOD) was 1.24 nM (S/N = 3). Compared with other detection methods, the proposed method had the advantages of higher sensitivity, lower detection limit and more simple operation.
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Journal of Integrative Agriculture
·
2017
·
IF 1.042
Feng ZHANG,Peng GAO,Xin-na GE,Lei ZHOU,Xin GUO,Han-chun YANG
Porcine reproductive and respiratory syndrome virus (PRRSV) actively induces cell apoptosis both in vitro and in vivo , which can contribute critically to viral pathogenesis. Previous studies have shown that the PRRSV nonstructural protein 4 (nsp4) is an important mediator of this process, but the underlying molecular details remain poorly understood. In this study, we found that the PRRSV nsp4 interacted with the mitochondrial inner membrane protein cytochrome c1 (cyto.c1) and induced its proteolytic cleavage. Interestingly, the cleaved N-terminal fragment of cyto.c1 was found to exert apoptotic activity, which could cause mitochondrial fragmentation, resulting in apoptotic cell death. And RNA interference (RNAi) silencing experiments further confirmed the crucial role which cyto.c1 played in nsp4- and PRRSV-induced cell apoptosis. Thus, our data provide an important piece of mechanistic clues for PRRSV-induced cell apoptosis and also elucidate a novel mechanism for the 3C-like proteases in this finding.
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