OPTICAL MATERIALS
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2022
·
IF 3.754
Yundong Zeng,Yunlan Xu,Dengjie Zhong,Jiaxin Mou,Haoyang Yao,Nianbing Zhong
The development of photocatalytic fuel cell (PFC) with visible-light response is usually limited by the low efficiency of electron-hole separation in photoanode . In this work, 20%-PTh/Ag 3 PO 4 /BiOI/Ti photoanode was prepared for the first time to construct a PFC with Cu 2 O/Cu cathode to degrade rhodamine B. With visible-light stimulation, the rhodamine B degradation rate, maximum photocurrent density and maximum power density of the PFC were respectively 96.33% (2 h), 0.39 mA cm −2 and 82.20 μW cm −2 . The main active species in the PFC were proved by quenching experiments to be h + , ∙OH and ∙O − 2 . The satisfactory performance of the PFC was due to that a double Z-scheme heterojunction was formed in the photocatalyst of 20%-PTh/Ag 3 PO 4 /BiOI/Ti photoanode, which made the photogenerated electrons of Ag 3 PO 4 and BiOI directly combine with the photogenerated holes of PTh , so that the photogenerated holes of Ag 3 PO 4 and BiOI and the photogenerated electrons of PTh directly or indirectly participated in the degradation reaction of RhB. In this way, the separation efficiency of electron-hole pairs in the photoanode was improved, and the performance of the PFC was significantly enhanced.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Qiang Le,Zhilin Cheng
As the adsorption technique was concerned, the facile, intact and low-cost separation process of adsorbents was desirable to the prospective feasible application. In present work, the nano-Ag 2 O particles were encapsulated in the hollow nanostructure of halloysites (HNTs) with the aid of CTAB-stabilized HNTs micelle by the space confinement method, and then the nano-Ag 2 O@HNTs nanocomposite was assembled in PVP/PAN electrospinning nanofiber membrane (NFM), and finally PVP template was removed through etching method, so as to access the hierarchical-porous structure. The structure and composition of nano-Ag 2 O@HNTs/PAN NFM were resolved by a series of characterizations. The nano-Ag 2 O@HNTs/PAN NFM not only was of abundant multi-pore structure with larger specific surface area of 23.484 m 2 /g and higher pore volume of 0.111 mL/g, but also exhibited excellent mechanical performance, of which the tensile strength and Young's modulus were up to 6.1 MPa and 75.9 MPa, respectively. Thanks to the existence of the exclusive pore structure and nano-Ag 2 O, the nano-Ag 2 O@HNTs/PAN NFM showed better adsorption desulfurization performance in the simulated thiophene (TH) oil, of which the breakthrough and saturated adsorption capacity were as high as 35.269 mg/g and 54.481 mg/g, respectively. Ultimately, the adsorption mechanism of TH molecules on the nano-Ag 2 O@HNTs/PAN NFM could be taken into account the synergistic effect of the porous diffusion , interface adsorption and active site adsorption.
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2022
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IF 5.895
Linhui Feng,Heping Cui,Pusen Chen,Khizar Hayat,Xiaoming Zhang,Chi-Tang Ho
An Amadori rearrangement product (ARP) derived from ribose (Rib) and glutathione (GSH) was prepared and identified as N-(1-deoxy-d-ribulos-1-yl)-glutathione by ultraperformance liquid chromatography–tandem mass spectrometry and NMR. Thermal treatment of the ARP aqueous solution was conducted, and a relatively high temperature was found to accelerate the degradation of the ARP. The concentration of furans formed at 120 °C was more than 6.39 times that at 100 °C, and especially, the high temperature favored the formation of furfural and 4-hydroxy-5-methyl-3(2H)-furanone through deoxyosone dehydration. The promoting role of extra-added GSH or its constituent amino acids was investigated in the volatile formation during thermal processing of the ARP. Both, the added GSH and its constituent amino acids, could timely capture glyoxal (GO) and methylglyoxal (MGO) to facilitate Strecker degradation, which improved pyrazine formation. Compared with glycine and glutamic acid, cysteine was the most effective extra-added amino acid to react with GO and MGO to produce pyrazine and methylpyrazine. More importantly, the cysteine degraded from extra-added GSH effectively accelerated the generation of sulfur-containing volatile compounds through the reaction of cysteine degradation products with furans and shorter-chain α-dicarbonyl compounds.
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PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
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2022
·Vol. 30
·期 1
·175-182
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IF 2.523
Liu Jing-Long,Dong Xian-Ping,Jia Ai-Quan,Xin Zhifeng,Zhang Qian-Feng
A series of amorphous RuS 2 and SBA-15 supported RuS 2 materials were prepared by solvothermal method using corresponding tris-dialkyldithiocarbamato ruthenium(III) complexes as precursors. The structures of the catalystline precursors Ru(S 2 CNR 2 ) 3 (R = Me, Et, i Pr), unsupported and supported amorphous RuS 2 -R materials as well as nanocrystalline RuS 2 were characterized and analyzed by IR, powder X-ray diffraction (XRD), thermo-gravimetric analysis (TGA), transmission electron microscope (TEM), N 2 sorption measurement, and temperature-programmed reduction (TPR). Powder X-ray diffraction patterns indicated the transformation of amorphous phase RuS 2 to crystalline RuS 2 with the heating treatment at 400 °C. The catalytic activity of RuS 2 -R/SBA-15 for thiophene hydrodesulfurization (HDS) was also investigated.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Yi Yang,Bicheng Zhu,Libo Wang,Bei Cheng,Liuyang Zhang,Jiaguo Yu
Artificial photosynthesis offers a promising strategy for converting solar energy into environmental-friendly H 2 O 2 . Herein, robust photocatalytic H 2 O 2 production through dioxygen reduction is achieved, reaching a high H 2 O 2 yield of 873 μmol L −1 h −1 . The photocatalyst was prepared by in-situ chemical vapor deposition of N, S co-doped graphene on TiO 2 nanofibers. Thanks to the intimate interface with large area and Schottky junction, the H 2 O 2 yield of the composite can be increased by eight times than that of pristine TiO 2 . Experimental results and density functional theory calculations clarify that the strong synergistic effect between the doped N and S atoms provides abundant active sites to facilitate the electron transfer, promote the adsorption of O 2 molecules, and restrain the decomposition of formed H 2 O 2 by suppressing H 2 O 2 adsorption. This work not only provides a novel approach to build close contact between photocatalyst and co-catalyst, but also develops a highly efficient photocatalyst for H 2 O 2 production.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Qiang Le,Yang Xiang,Zan Liu,Zhilin Cheng
The selective adsorption desulfurization technology is considered to be of energy conservation and environment-friendly operation. However, the ongoing development of adsorption desulfurization is greatly restricted by the adsorbents with preferable mechanical properties and sustainable separation efficiency. In this paper, a submicron-sized Cu 2 O necklace-shaped polyacrylonitrile (PAN) nanofiber composite membrane (Cu 2 O/PAN NFM) was prepared by electrospinning technology. The structure and mechanical properties of NFM were determined by a series of characterizations. The results showed that the resulting Cu 2 O/PAN-NFM has a larger total pore volume (0.0802 mL/g), higher tensile strength (5.65 MPa) and lower friction coefficient (0.2571) than those of PAN nanofiber membrane (PAN NFM). The static and dynamic adsorption performances of the Cu 2 O/PAN NFM were investigated with thiophene(TH) simulated oil. The results showed that the static and dynamic saturated adsorption capacities of the Cu 2 O/PAN NFM were up to 32.91 mg/g and 4.57 mg/g at 500 mg/L initial concentration, respectively. Besides, the adsorption kinetics and isotherms of TH on the Cu 2 O/PAN NFM indicated that the TH adsorption data are fitting to Avrami model and Liu isotherm. In addition, the exclusive notable merits of the Cu 2 O/PAN NFM expressed at the robust mechanical properties and outstanding separation efficiency while keeping the sustainable adsorption capacity after the repeated recycling, which exhibited a promising application towards adsorption desulfurization.
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高影响因子
ENERGY
·
2022
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IF 8.857
Feng Chen,Yuhao Zhang,Liang Zhao,Jinsen Gao,Pengfei Hao,Qingfei Meng,Chunming Xu
Simulations can effectively and accurately determine optimal process conditions without extensive experiments in the desulfurization of fluid catalytic cracking (FCC) naphtha by extractive distillation . The UNIFAC-original model in Aspen Plus v8.8 is suitable for simulating the process with several components. However, the lack of group binary interaction parameters between the solvent and sulfides in FCC naphtha reduced the accuracy of the UNIFAC-original model in Aspen Plus v8.8. Consequently, the required group binary interaction parameters were calculated using binary vapor–liquid equilibrium (VLE) for improved accuracy. The obtained VLE data were thermodynamically consistent. The empty group binary interaction parameters were calculated using the VLE data. An accurate simulation method was obtained for the desulfurization of FCC naphtha using these parameters, and the absolute deviation between the simulated and experimental results was 0.4 wt%. Subsequently, sensitivity analysis was performed to obtain the optimal process conditions. The experimental results correlated well with the simulation results, thereby proving that the parameters were regulated and that the simulation demonstrated high accuracy. Moreover, the sulfur content in the raffinate could be decreased to 4.37 mg/kg. Thus, refineries can rapidly establish their optimal process conditions through simulation.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Konglu Guo,Yueyang Xu,Yan Yin,Yongping Zeng
Adsorption desulfurization can effectively remove thiophene-containing compounds in fuels. UiO-66 is a potential candidate for adsorption desulfurization due to the excellent chemical stability and resistances to acids and alkali. However, the adsorption capacity is relatively low for the big molecules of sulfide (such as thiophenes) because of the pore size in the microporous structure. We used Zn 4 O(BC) 6 as a template to synthesize a new π-complexation adsorbent (H-UiO-66-SO 3 Cu(I)) via ion-exchange and steam-induced reduction, with hierarchical porous (microporous and mesoporous) structure. The adsorbent was characterized by FT-IR, XRD , SEM , TEM and N 2 adsorption-desorption isotherms. The results show that H-UiO-66-SO 3 Cu(I) has the stable structural properties with the new mesopores . H-UiO-66-SO 3 Cu(I) has a good adsorption performance for thiophene and benzothiophene in the model fuel. The regeneration results show that H-UiO-66-SO 3 Cu(I) can be recycled four times and still has good adsorption performance.
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高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2022
·
IF 7.693
Zhengpeng Yang,Junfei Yang,Bo Shuai,Yutao Niu,Zhenzhong Yong,Kunjie Wu,Chunjing Zhang,Xiangyu Qiao,Yongyi Zhang
Fiber-reinforced cement-based grouting material has triggered strong interest owing to its promising application in coal mining . However, how to enable a combined feature of great robustness, exceptional electrical and thermal behaviors, which is crucial for high-performance realization, still remains a significant challenge. Herein, an effective and facile strategy to address the issue was proposed by manufacturing functionalized carbon nanotube (CNT) fibers featuring prominent flexibility, excellent water dispersibility , superior tensile strength and electrical conductivity . Benefiting from the chemical bonds generated between cement hydration product and CNT-COOH fiber effectively embedded into cement matrix , the obtained fiber-cement hybrid with water-cement ratio of 0.8 and 0.5% fiber content was integrated into a whole, with flexural strength (4.8 MPa) and compressive strength (27 MPa) increased by 50% and 30%, respectively, compared to control sample after curing for 28 days. Meanwhile, attributing to the formation of interconnected network architecture built by CNT-COOH fibers in the cement matrix, the hybrid featured a significantly enhanced performance in heat transfer and electrical conductivity, which was further improved under loading. This work has shed light on new strategies for manufacturing carbon-based fiber reinforced cement-based grouting materials with great robustness, prominent electrical and thermal behaviors toward future uses.
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高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2022
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IF 4.291
Jing Li,Guoyun Zhou,Yan Hong,Wei He,Shouxu Wang,Yuanming Chen,Chong Wang,Yao Tang,Yukai Sun,Yongkang Zhu
Wearable electronic devices with biocompatibility and stability to monitor the practical human physiological states are urgently expected for some intensive disease recovery or healthy fitness improvement. In this work, a highly sensitive piezoelectric sensor with the aid of polythiophene (PT) promoting polyvinylidene Fluoride (PVDF) from α-phase to β-phase was designed. Electric-sensitivity of 4.961 V/N is obtained at the low-pressure and 0.09 N periodic pressure positively produces considerable output open circuit voltage. It is proved that PT facilitates PVDF to accumulate charge carriers at their interfaces, resulting in interface polarization and thus extremely piezoelectric sensitivity. Reliability test suggested the sensor stays stable performance after a long-term (~2.6% decline after 5000 cycles) repetitive deformation. Through the practices of our assembled wearable sensor demonstrating its powerful ability in recording human joint movement and breathing, which also shows that it is very promising in online movement monitoring of personal health.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Shizong Wang,Jianlong Wang
Cobalt sulfides as persulfate activator have received increasing interest in the field of persulfate-based advanced oxidation process. In this study, Co 9 S 8 anchored in N, S, O heteroatoms co-doped carbon (CoSx@N-S-O-C) composite was prepared with different sulfur precursors (sulfur, thiourea, thiophene and benzyl disulfide), and used to activate peroxymonosulfate (PMS) for sulfamethoxazole (SMX) degradation. The effect of temperature, pH, inorganic ions, humic acids and water components on SMX degradation was investigated. The results showed that sulfur precursor could regulate the catalytic activity of the composite through changing the cobalt speciation and carbon structure. The catalytic activity was highest when the molar ratio of sulfur to cobalt was 5:1 (CoS x @N-S-O-C-5). Sulfate radicals (dominant) and hydroxyl radicals contributed to SMX degradation. The intermediate products during SMX degradation were identified, and the possible pathway of SMX degradation was proposed. Pyridinic N, Co-N, cobalt, S 2− , S 2 2− , C-S-C and C-SO x were active sites for PMS activation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Yonghou Xiao,Jiahui Fu,Heyang Zhu,Qidong Zhao,Liang Zhou
The diffusion limitation owing to the long and narrow pore structure in traditional ZSM-5 zeolite could restrain the adsorptive desulfurization performance towards thiophene sulfur compounds from fuels. Herein, ZSM-5 zeolite nanocrystals were successfully fabricated using steam-assisted gel crystallization strategy to control the size of zeolite particles within 70 ∼ 160 nm. Compared to traditional micron ZSM-5, ZSM-5 zeolite nanocrystals could effectively reduce the diffusion pathway, enlarge the specific surface area, and increase exposure of adsorption sites, which could enhance the desulfurization performance. ZSM-5 nanocrystals with a mole ratio SiO 2 /Al 2 O 3 of 200 exhibited a satisfactory desulfurization efficiency, and the breakthrough capacity attained 0.0509 mmol S/g adsorbent. After ZSM-5 nanocrystals were ion-exchanged with NH 4 + and Ag + , both mesoporous characteristics and the Lewis acid (L-acid) sites were enhanced, which promoted the adsorption desulfurization performance. Furthermore, nanocrystalline ZSM-5 and Ag/ZSM-5 also exhibited acceptable regeneration performance. This study is expected to provide an effective strategy and a facile method to prepare nanocrystalline ZSM-5 based adsorbents for the development of efficient desulfurization materials.
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高影响因子
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