JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Gaoshuang Zuo,Hong Wang,Huiqing Yan,Zhichao Li,Peihua Zhao,Chao Wang,Yanzhong Wang
Designing highly efficient and cost-effective bifunctional electrocatalyst capable of simultaneously driving hydrogen evolution (HER) and oxygen evolution (OER) reactions is critical for advancing water-splitting technologies. Herein, Co-based thiophene dicarboxylate (Co-TDC) frameworks were fabricated on nickel foam (NF) via a solvothermal approach, followed by low-temperature calcination and subsequent phosphorization to produce Co 2 P@S-doped carbon (Co 2 P@SC) composites. The as-prepared Co 2 P@SC exhibited high electrocatalytic performances with low overpotentials of 78 and 242 mV at 10 mA cm −2 for HER and OER, respectively. Additionally, the water electrolytic cell assembled with Co 2 P@SC as a bifunctional electrocatalyst demonstrates exceptional performance, requiring only 1.57 V to achieve a current density of 10 mA cm −2 , which highlights its outstanding overall water-splitting efficiency. This paper presents a novel approach to fabricate MOFs-derived bifunctional electrocatalysts for high-efficiency overall water splitting.
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ENERGY & FUELS
·
2015
·
IF 2.79
Fernando T. Reyes,Malcolm A. Kelland,Li Sun,Jian Dong
Novel citric-acid-based polyamides were synthesized by polycondensation reactions using tributyl citrate (TBC) and ethylene diamine (EDA), producing hyperbranched poly(ethylene citramide)s with NH2 termini, which were functionalized with isopropyl, n-butyl, and cyclohexyl groups via the urea group. Characterization was carried out by 1H and 13C nuclear magnetic resonance (NMR) spectroscopic techniques. Molecular weights in this polymer family varied from 3000 to 10 000 Da. The activity of this polymer family as gas hydrate kinetic inhibitors (KHIs) was evaluated for the first time. Constant cooling (1 °C/h) experiments were carried out in high-pressure steel rocking cells using a synthetic natural gas that preferentially forms structure II gas hydrates. The best KHI performance was given by poly(ethylene citramide) CONHCyHe with pendant N-cyclohexyl groups (Mn = 5.65 × 103, and Mw = 1.14 × 104). A structure–activity relationship (SAR) analysis of the KHI test results supports the hypothesis that increasing the size of the lipophilic groups increases the KHI performance as long as water solubility is maintained through hydrogen bonding via the amide and/or urea functional groups.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 38
·期 6
·e7500
·
IF 3.7
Yu Zhang,Pei Wang,Gaiying Han,Zhaoyang Wang,Haitao Yu,Zhenzi Li,Xuepeng Wang,Ying Xie,Wei Zhou
Defects engineering is significant for photocatalytic environment remediation. To this end, visible-light-driven α-Fe 2 O 3 /ZrO 2-x S-scheme heterojunction photocatalysts with optimal oxygen vacancy (O v ) defects are successfully synthesized via a two-step method. Compared with pristine UiO-66-NH 2 -derived ZrO 2-x and α-Fe 2 O 3 , the heterojunction photocatalysts exhibit a wider range of visible light response and higher efficiency in separating photogenerated electron–hole pairs. Among them, the 5% α-Fe 2 O 3 /ZrO 2-x sample shows the best photocatalytic performance to the degradation of tetracycline (TC) (89.3%), in which the pseudo-first-order kinetic rate constants are 8.20 and 16.75 times that of pristine ZrO 2-x and α-Fe 2 O 3 , respectively. The outstanding photocatalytic degradation efficiency can be attributed to both the narrow-bandgap ZrO 2-x with visible light response and the formation of α-Fe 2 O 3 /ZrO 2-x S-scheme heterojunctions. During the formation of heterojunctions, the concentration of oxygen vacancies (O v ) at the interface of α-Fe 2 O 3 /ZrO 2-x decreases monotonically with the increasing loading of α-Fe 2 O 3 , thereby altering the electronic structure of the photocatalyst and forming the heterojunction firmly. In addition, the high stability implies the potential applications in fields of environment.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xueying Wang,Rongyu Zhang,Jun Luo,Hefan Zhang,Qiaozhi Yan,Jianwei Zhao,Zhao Liang,Weilong Shi,Changyu Lu
Through the interface regulation of surfactant, using the hydrothermal method to deposit 0D ZnSnO 3 on the surface of 3D CuBi 2 O 4 , the S-scheme ZnSnO 3 -CuBi 2 O 4 (ZSCB) heterojunction photocatalyst was synthesized, which exhibits outstanding redox capabilities. The strong light absorption performance of CBO in the visible range promotes its excellent photothermal conversion ability under visible light. Under visible light irradiation, its surface temperature can be increased from 26.2℃ to 98.5℃ within 9 minutes. Images at 808 nm near-infrared radiation show that the S-scheme ZSCB heterojunction can convert 34.16 % of light energy into heat energy in aqueous solution. Due to the S-scheme charge transport mechanism and photothermal effect of ZSCB, the heterojunction had excellent photogenerated carrier separation efficiency and high redox capacity, which can degrade 85.4 % of TC within 90 minutes, and the degradation rate was 3.1 times that of monomer CBO, also excellent TC degradation performance in simulated natural water and different ionic. The Fukui index and the change of mass charge ratio of TC during the degradation process, predicting the attack site of TC at the atomic level and clarifying that the S-scheme ZSCB heterojunction was controlled by electrophilicity, nucleophile and free radical during the photothermal photocatalytic degradation of TC. The ecological structural activity relationship model and mung bean culture experiment revealed the low ecological risk of TC degradation from theory to practice. This study provides a novel approach to the degradation of emerging pollutants and the environmental toxicology research associated with S-scheme heterojunctions.
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ChemCatChem
·
2024
·
IF 3.8
Cong Luo,Haoru Tang,Houfang Lu,Kejing Wu,Yingying Liu,Yingming Zhu,Binshen Wang,Bin Liang
Graphical A high glycerol carbonate yield of 90 % is achieved by the one–pot reaction of CO 2 , propylene oxide, and glycerol catalysed by DBU–based PIL, which can be facilely recovered and steadily reused without deactivation. The development of efficient heterogeneous catalysts for upgrading CO 2 , a greenhouse gas, and glycerol (Gly), an untapped biomass resource, into glycerol carbonate (GC) remains a challenge. Herein, 1,8-diazabicyclo[5.4.0] undec–7–ene (DBU)–based poly (ionic liquid)s (PILs) were constructed for the one–pot synthesis of GC from CO 2 , Gly, and propylene oxide. Among them, P−DVB−DBUVBI–1 exhibited the best catalytic performance, achieving a GC yield of 90 % under optimal reaction conditions (100 °C, 6 h). The PIL catalyst was easily recovered and reused, as demonstrated by stable activity over five cycles. Density functional theory calculations showed that owing the strong positive charge delocalization ability of DBU onium, DBU–based PILs exhibit high nucleophilicity, which is the key to their efficient catalytic performance in the one–pot reaction.
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LUMINESCENCE
·
2016
·Vol. 32
·期 3
·277-284
·
IF 1.452
Jianqiu Chen,Juan Shu,Jiao Chen,Zhiran Cao,An Xiao,Zhengyu Yan
S,N co-doped carbon quantum dots (N,S-CQDs) with super high quantum yield (79%) were prepared by the hydrothermal method and characterized by transmission electron microscopy, photoluminescence, UV–Vis spectroscopy and Fourier transformed infrared spectroscopy. N,S-CQDs can enhance the chemiluminescence intensity of a luminol–H 2 O 2 system. The possible mechanism of the luminol–H 2 O 2 –(N,S-CQDs) was illustrated by using chemiluminescence, photoluminescence and ultraviolet analysis. Ranitidine can quench the chemiluminescence intensity of a luminol–H 2 O 2 –N,S-CQDs system. So, a novel flow-injection chemiluminescence method was designed to determine ranitidine within a linear range of 0.5–50 μg ml −1 and a detection limit of 0.12 μg ml −1 . The method shows promising application prospects.
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HIGH PERFORMANCE POLYMERS
·
2016
·
IF 1.045
Bei Liu,Zheng Chen,Liming Lin,Yuntao Han,Jinhui Pang,Zhenhua Jiang
3,6-Diphenyl-9H-carbazole pendants are grafted herein to poly(arylene ether ketone)s (PAEKs) via the Ullmann C–N coupling reaction. To the best of our knowledge, this is the first time that PAEKs containing a carbazole pendant (Cz) have been synthesized through the Ullmann C–N coupling reaction. The high molecular weights of PAEK-Cz (PAEKs with 3,6-diphenyl-9H-carbazole pendants) are inherited from their precursors, owing to the high reactivity of their monomers. The obtained PAEK-Cz-x polymers exhibit good solubility in most common organic solvents and excellent thermal stabilities, with the 5% weight loss temperatures for all products being above 598°C under a nitrogen atmosphere. The glass transition temperatures are all above 199°C and can be controlled by adjusting the feed ratio of monomers. The polymer membranes obtained by the casting method are tough and thus have strong potential for practical applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2017
·
IF 3.359
Chunli Liu,Hongchao Mao,Jianhua Zhu,Suobo Zhang
The original quaternized cardo poly(arylene ether sulfone)s (QPES-I) ionomers was employed as the virgin polyelectrolyte and its counterions (I − ) were exchanged with F − and PF 6 − to prepare QPES with different anions(QPES-X, X = F, PF 6 ), then QPES-X/PSF blended ultrafiltration membranes was prepared by the nonsolvent induced phase inversion process. Scanning electron microscopy (SEM) was used to characterize the cross section morphology and surface morphology of blended membranes, and atom force microscopy (AFM) was employed for obtaining the three-dimensional images of QPES-X/PSF blended membranes, respectively. The surface chemical composition of the asymmetric membrane was investigated by X-ray photoelectron spectroscopy (XPS). Under similar preparation conditions, the water contact angle on membrane surface increased in the order of QPES-F < QPES-I < PSF < QPES-PF 6 , while the pure water flux of the membranes decreased with that order. The results revealed that the surface and cross section morphology, surface roughness, QPES-X content on membrane surface, as well as the hydrophilicity and performance of blended membranes were closely related to the counterions of QPES-X. Membrane prepared with QPES-F is hydrophilic and possesses outstanding performance among all the investigated materials, demonstrating a water flux of 2163 L m −2 h −1 and BSA rejection of 93% at an 18 wt% polymer concentration and 15% QPES-F content. Antimicrobial activity studies demonstrate that the blended membrane having 15% QPES-F possess a sterilization rate of 73% towards E . coli .
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Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 35
·13476-13481
·
IF 8.262
Dandan Zhao,Qingmiao Fan,Qingwen Tian,Zhengji Zhou,Yuena Meng,Dongxing Kou,Wenhui Zhou,Sixin Wu
A non-hydrazine solution process has been considered as a promising way for the deposition of Cu(In,Ga)(S,Se)2(CIGSSe) thin films. However, from our previous work, the presence of a fine-grained layer in the absorber layer was shown to be an obstacle to further improve the solar cell efficiency. Here, an improved fabrication route is proposed to solve this problem. A mixture of Cu2S, In2Se3, Ga and Se was simultaneously dissolved in 1,2-ethanedithiol and 1,2-ethylenediamine, forming a homogeneous precursor solution to deposit CIGSSe nanocrystal films. By optimizing the selenization method by using rapid thermal processing (RTP) combined with an improved graphite box, large grains throughout the whole absorber layer were successfully obtained. Based on such a high-quality CIGSSe absorber layer, an encouraging power conversion efficiency of 11.8% has been achieved with a Jsc of 28.25 mA cm−2, a Voc of 596 mV and a FF of 69.79% and without an antireflection coating.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Sizhao Zhang,Feng Ding,Xuegang Luo,Xiaoyan Lin
Hierarchical Mo-doped S/BiOCl (MSB) heterostructures were successfully prepared by a facile one-step reflux method. The resulting samples were evaluated by XRD , SEM, TEM , DRS and XPS . The results obtained showed that MSB possessed an outstanding photo and/or thermocatalytic performance under near room-temperature for removal of methylene blue (MB), reaching up to 99.9 and 96.5% for photo/thermocatalytic degradation (PTD) and thermocatalytic degradation (TD), respectively. The hole/radical scavenger tests indicated holes and free radial were both participated in PTD and TD reactions, but the holes formed from degradation reactions were strongly considered as the most influential impact on conducting PTD and TD patterns rather than free radicals. Furthermore, the kinetics regarding PTD and TD routes were also monitored, preferentially fitting to Langmuir–Hinshelwood behavior. Briefly, this study may provide new insights into fabricating hierarchical heterostructures by in-suit one-step approach for decontamination of organic pollutants separately using PTD or TD.
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SOLAR ENERGY
·
2017
·
IF 4.018
Yingli Pei,Jing Guo,Dongxing Kou,Wenhui Zhou,Zhengji Zhou,Qingwen Tian,Yuena Meng,Sixin Wu
The doping of indium into absorber layer has been proven to be beneficial for hybrid buffer structured Cu 2 ZnSn(S, Se) 4 (CZTSSe) solar cells, but it is difficult to precisely control the doping content only relying on In diffusion from In 2 S 3 emitter. Herein, we use the solution method to prepare In-substituted CZTSSe layer by directly doping In 2 Se 3 into metal chalcogenides precursor solution. The doping content can be precisely controlled and the influences of indium doping on cell performance are systematically discussed. Mott-Schottky and resistivity measurements indicate that the carrier concentration and charge transport process are monotonically enhanced with increasing In/(In + Sn) content (0 at.%, 3 at.%, 6 at.% and 12 at.%). The improvements of series resistance also lead to a monotonic increase of fill factor ( FF ) from 52.1% to 64.8%. Due to the larger recombination at high doping content, the 6 at.% In content device finally contributes the highest power conversion efficiency of 8.47%. It is expected that a precisely controlled indium doping could further improve cell performance for efficient hybrid buffer structured devices.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Xiu Qin Wang,Chen Xiao Lin,Qiu Gen Zhang,Ai Mei Zhu,Qing Lin Liu
Facile synthesis of poly (ether sulfone)-based anion exchange membranes (AEMs) bearing flexible pendent quaternary ammonium (QA) groups for fuel cells is reported. (2,3-Epoxypropyl) trimethyl ammonium chloride (EPTMAC) is directly grafted onto the hydroxyl-bearing poly (ether sulfone) (PES) backbone via one-step ring-opening reaction to introduce ion conductive moieties. This scheme is more straightforward than the conventional two-step functionalization approach via chloromethylation or radical-initiated bromination and Menshutkin reactions . This method can be used to control the degree of functionalization of QA-containing PES easily. 2D nuclear overhauser effect spectroscopy (NOESY) shows that QA groups aggregate and self-assemble in the functionalized-PES solutions which are in favor of fabricating a membrane with phase separation morphology, as well as confirmed by small angle X-ray scattering (SAXS), transmission electron microscopy (TEM) and atomic force microscopy (AFM). These resulting AEMs exhibit reasonable hydroxide conductivity, low water uptake, high power density, and desirable durability in a single fuel cell. This suggests that they are good candidates for fuel cells.
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