CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Yongsong Ma,Xianglin Liu,Mengyi Tang,Kaifa Du,Huayi Yin,Xuhui Mao,Dihua Wang
Heteroatom-doped carbon materials have been proved as potent catalysts for the remediation of organic contaminants. Herein, molten salt electrolysis (MSE) was employed to convert waste eggshell and Co 3 O 4 into N, P, S tri-doped core–shell catalyst (Co@NPSC), achieving the conversion of waste eggshell into value-added materials. Impressively, Co@NPSC/peroxymonosulfate (PMS) system exhibited an exceptional ultra-high turnover frequency (TOF) value of 83.86 min −1 for sulfamethoxazole (SMX) degradation with a low catalyst dosage of 0.001 g L –1 . Subsequently, density functional theory (DFT) simulation clarified the synergistic essences of catalytic oxidation (i.e., the Co@NPSC catalyst reduced the adsorption energy of PMS molecular on its surface, reduced itself work function, enhanced the length of the O-O bond ( I O-O ) of PMS molecule, and facilitated electron transfer for PMS activation). In addition, both theoretical predictions and acute toxicity assay results indicated that the degradation of SMX equals detoxification. This work provides a new insight into the reutilization of waste eggshell and the design of heteroatom-doped core–shell catalysts.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yisheng Xu,Yaoheng Liang,Zeng Yuai,Hangyu Long,Qizhi He,Kaijin Guo,Yuyuan Zhang,Dongchu Chen,Xuejun Xu,Huawen Hu
Although g-C 3 N 4 (CN) materials have been extensively explored for the photocatalytic degradation of organic pollutants, their weak response to visible light and fast recombination of photoexcited electron-hole pairs restrain their practical applications. Herein, we deeply mediated the CN's energy-band structure, morphology, and surface properties by non-metal (P) and metal (Mo) co-doping based on the thermal treatment of a phosphomolybdic acid hydrate and dicyandiamide mixture in a straightforward one-step manner. Meanwhile, cyano groups and nitrogen vacancies were generated as a result of the co-doping, and the resulting P, Mo co-doped CN (PM-CN) exhibited thinner layers, smaller sizes, and superior visible-light harvesting capacity and charge separation efficiency. Consequently, highly active PM-CN was obtained for photocatalytic tetracyclines (TC) degradation, and the rate was calculated to be 0.01 min −1 , 3.3 times greater than that of the pure CN, outstripping the single P- and Mo-doped counterparts. A free radical scavenging test demonstrated that the reactive species •O 2− and h + were critical in TC degradation. The present work is expected to shed light on co-doping CN with non-metal and metal elements to obtain high-performance, visible-light-responsive photocatalysts for practical environmental remediation.
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COMPOSITES PART B-ENGINEERING
·
2022
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IF 11.322
Lin Zhang,Bo-Wen Liu,Yu-Zhong Wang,Teng Fu,Hai-Bo Zhao
With the rapid development of 5G technology, functional coatings with both high-efficiency flame retardancy and electromagnetic interference shielding (EMI) are urgently needed, while traditional inefficient methods have encountered bottlenecks. Herein, we demonstrate an eco-friendly and multifunctional nano/micro coating constructed by biomass phytic acid (PA) induced polymerization and self-assembly of polyaniline (PANI) nanoparticles and dip-coating of silver microwires (AgMWs). In this design, PA with high flame-retardant efficiency is smartly doped into PANI to achieve P-N synergistic flame retardancy and improve electrical conductivity of PANI simultaneously. Consequently, under the coaction of AgMWs, P-doped PANI nanoparticles, as well as unique continuous micro-nano structures, the nano/micro coating can endow commercial polyurethane (PU) foams with outstanding EMI shielding performance (∼51 dB in X-band). Meanwhile, the coated PU foam exhibits high flame retardancy due to the P-N synergistic effect of PA/PANI, which self-extinguishes immediately after ignition during the UL-94 vertical burning test, shows a high limiting oxygen index (LOI) value of 34.8%, and exhibits a 50.7% lower peak heat release rate compared with pure PU foam. Further, the functional nano/micro coating with three-dimensional and highly porous structure makes the foam thermally insulating and infrared stealthing. The eco-friendliness and simplicity of this method and its successful application in commercial PU foam make it potentially applicable for the preparation of various kinds of multifunctional EMI shielding materials.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiacheng Wei,Dianlun Wu,Chunfa Liu,Fei Zhong,Guibin Cao,Benzhang Li,Chunmei Gao,Lei Wang
Single-walled carbon nanotubes (SWCNTs) show great potential as flexible thermoelectric (TE) materials, however, the low Seebeck coefficients and high thermal conductivities restrict their applications in this field. In this work, taking the advantages of one-dimensional (1D) SWCNTs and two-dimensional (2D) MXenes, a series of three-dimensional (3D) hollow structured SWCNT/MXene films had been prepared for the first time as potent p-Type TE materials. First, compared to that of SWCNTs, the Seebeck coefficients of the composites can be increased due to energy-filtering effect at the SWCNT/MXene interfaces. Holes in the SWCNTs were compensated by electrons from MXenes, leading to a decreased hole concentration, which can also increase the Seebeck coefficients. Second, 3D hollow structures were formed in the composite films, which can decrease the thermal conductivity significantly. Third, contact junctions between SWCNTs and MXenes were formed in the composites, which were beneficial for electron transfer. As a result, at MXene loading of 10 wt%, SWCNT/MXene-10 displayed the highest TE performance. The Seebeck coefficient and ZT value is about 2 times and 20 times higher than that of the neat SWCNTs, respectively. At last, a TE device consists of 10 SWCNT/MXene-10 legs was prepared with a maximum output power of 1.54 µW at temperature difference of 117.3 K. This work provides a facile strategy in designing of SWCNT-based TE materials with high performances.
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Nanomaterials
·
2022
·Vol. 12
·期 6
·899
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IF 5.719
Xiaoyan Wu,Wei Li,Qingrong Chen,Caixia Xu,Jiamian Wang,Lingyuan Wu,Guodong Liu,Weiping Wang,Ting Li,Ping Chen,Long Xu
Light-induced degradation (LID) phenomenon is commonly found in optoelectronics devices. Self-healing effect in halide lead perovskite solar cells was investigated since the electrons and holes in the shallow traps could escape easily at room temperature. However, the degradation in the semiconductors could not easily recover at room temperature, and many of them needed annealing at temperatures in the several hundreds, which was not friendly to the integrated optoelectronic semiconductor devices. To solve this problem, in this work, LID effect of photocurrent in p-type Mg-doped gallium nitride thin films was investigated, and deep defect and vacancy traps played a vital role in the LID and healing process. This work provides a contactless way to heal the photocurrent behavior to its initial level, which is desirable in integrated devices.Keywords:Mg-doped gallium nitride;light-induced degradation;photocurrent device;contactless healing
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
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IF 10.383
Lifeng Cui,Zhide Wang,Shifei Kang,Yanyan Fang,Ya Chen,Weikang Gao,Zhiyuan Zhang,Xin Gao,Chunyu Song,Xiaodong Chen,Yangang Wang,Guoxiu Wang
Potassium-ion batteries (KIBs) are gradually being considered as an alternative for lithium-ion batteries because of their non-negligible advantages such as abundance and low expenditure of K, as well as higher electrochemical potential than another alternative─sodium-ion batteries. Nevertheless, when the electrode materials are inserted and extracted with large-sized K+ ions, the tremendous volume change will cause the collapse of the microstructures of electrodes and make the charging/discharging process irreversible, thus disapproving their extended application. In response to this, we put forward a feasible strategy to realize the in situ assembly of layered MoSe2 nanosheets onto N, P codoped hollow carbon nanospheres (MoSe2/NP-HCNSs) through thermal annealing and heteroatom doping strategies, and the resulting nanoengineered material can function well as an anode for KIBs. This cleverly designed nanostructure of MoSe2/NP-HCNS can broaden the interlayer spacing of MoSe2 to boost the efficiency of the insertion/extraction of K ions and also can accommodate large volume change-caused mechanical strain, facilitate electrolyte penetration, and prevent the aggregation of MoSe2 nanosheets. This synthetic method generates abundant defects to increase the amounts of active sites, as well as conductivity. The hierarchical nanostructure can effectively increase the proportion of pseudo-capacitance and promote interfacial electronic transfer and K+ diffusion, thus imparting great electrochemical performance. The MoSe2/NP-HCNS anode exhibits a high reversible capacity of 239.9 mA h g–1 at 0.1 A g–1 after 200 cycles and an ultralong cycling life of 161.1 mA h g–1 at 1 A g–1 for a long period of 1000 cycles. This nanoengineering method opens up new insights into the development of promising anode materials for KIBs.
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高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 12
·6560-6568
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IF 14.511
Yunqing Kang,Haoran Du,Bo Jiang,Hui Li,Yanna Guo,Mohammed A. Amin,Yoshiyuki Sugahara,Toru Asahi,Hexing Li,Yusuke Yamauchi
Supported amorphous alloy catalysts have received wide attention due to their unique structural and electronic properties, high catalytic activity, and thermal stability. In this work, a carbon nanotube (CNT)-supported amorphous Ni–P alloy nanoparticles (NPs) catalyst, referred to as Ni–P/CNTs-MA, is synthesized using a simple one-pot microwave-assisted approach. The prepared Ni–P/CNTs-MA catalyst displays smaller Ni–P NPs, higher metal dispersion and stronger metal–support interactions than the reference catalyst prepared by the traditional water bath heating method (Ni–P/CNTs-WB). The resulting Ni–P/CNTs-MA catalyst exhibits enhanced catalytic activity for the hydrogenation of nitroarenes compared to the Ni–P/CNTs-WB catalyst. The Ni–P/CNTs-MA catalyst also exhibits improved thermal stability and catalytic durability, probably due to the strong interaction between the Ni–P NPs and CNTs.
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NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 13
·6274-6282
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IF 3.925
Xiu Xing,Yan Liu,Ming-Liang Shi,Kun Li,Xin-Yue Fan,Zhong-Liu Wu,Na Wang,Xiao-Qi Yu
Controllable and mild photoenzymatic production of chiral alcohols was realized by coupling a versatile photochemical NAD(P)H regeneration system with (R)- or (S)-selective ketoreductases. The efficiency of NAD(P)H regeneration was improved using a Rhodium functionalized metal organic framework, namely Rh-UiO-67, to adjust and control electron transport and electron utilization. Furthermore, six different ketoreductases could be successfully immobilized on Rh-UiO-67 and combined with the light-driven NAD(P)H regeneration system to produce chiral aryl alcohols. Various chiral alcohols with complementary (R)- and (S)-conformations can be constructed by this method with high yields (97%) and excellent stereoselectivity (>99% ee).
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HIGH PERFORMANCE POLYMERS
·
2022
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IF 1.73
Zhuang Hou,Chuan Li,Huihuan Wang,Bolun Li,Haopeng Cai
The bisphenol F epoxy resin (DGEBF) reacted with 10-(2,5-Dihydroxyphenyl)-10H-9-oxa-10-phospha-phenantbrene-10-oxide (ODOPB) and phenyltrimethoxysilane (PTMS) to obtain a novel epoxy resin containing both phosphorus and silicon (EP-P/Si). EP-P/Si exhibited evidently improved flame retardancy, with a limited oxygen index value of 33.4% and UL-94 V-1 rating acquired. In cone calorimeter test, its peak heat release rate (PHRR), total heat release (THR), average effective heat of combustion (av-EHC), and total smoke production (TSP) were reduced by 36.0%, 19.5%,11.5%, and 7.2% compared with neat epoxy resin (EP), respectively, indicating that the P/Si synergistic effect not only improved the flame retardancy but also inhibited the smoke release. The flame retardancy mechanism was studied by analysis of char residue and pyrolysis behavior in gas phase. Scanning electron microscopy (SEM) results exhibited that EP-P/Si formed a dense and compact carbon layer acting as a barrier to inhibit further combustion. And the Fourier transform infrared (FTIR) spectra, laser Raman spectroscopy (LRS), and X-ray photoelectron spectroscopy (XPS) results indicated that it had good thermal stability. In addition, the pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) results suggested that the phosphorus-containing radicals (·PO2) that had quenching effect existed in the gas phase. While the flame retardancy got improved, EP-P/Si also exhibited excellent mechanical properties, with an improvement of 31.8%, 6.2%, and 369.7% in tensile strength, flexural strength, and impact strength compared with EP, respectively.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 10
·7543-7558
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IF 2.779
Duan Mengtian,Wu Daoxin,Wu Jialun,Tong Haixia
A precipitation process was used to produce Ag 3 PO 4 with an irregular small polyhedral structure and an average size of 200–300 nm. Furthermore, using a simple dissolution precipitation technique, polyhedral Ag 3 PO 4 was successfully deposited on the surface of ZnWO 4 . XRD, SEM, TEM, XPS, UV–Vis DRS, and FT-IR spectroscopy were employed to analyze ZnWO 4 /Ag 3 PO 4 composites. The photocatalytic oxidation ability of composites was assessed using Rhodamine B dye degradation model. The results revealed that ZnWO 4 /Ag 3 PO 4 composite material displayed improved visible-light photocatalytic activity, with 7% ZnWO 4 /Ag 3 PO 4 exhibiting the maximum photocatalytic activity. The degradation rate of RhB was 94.0% after 120 min of visible-light irradiation. Nyquist plot indicates that 7% ZnWO 4 /Ag 3 PO 4 composites show the smallest diameter, suggesting a more effective separation of photogenerated electron–hole pairs and faster interface charge transfer. The photocatalytic activity of ZnWO 4 /Ag 3 PO 4 composites does not deteriorate considerably after four cycles, indicating their high stability. The active species capture tests show that h + and •OH are possible reactive species in the degradation reaction. Finally, the p-n heterojunction mechanism is proved by the discussion of the band structure. This study demonstrates that ZnWO 4 /Ag 3 PO 4 photocatalytic composites can be utilized to degrade contaminants.
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EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
·
2021
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IF 6.514
Jiaqi Lu,Ru Li,Binsong Mu,Yao Peng,Yi Zhao,Yuesen Shi,Li Guo,Li Hai,Yong Wu
A type of pH-sensitive multi-targeted brain tumor site-specific liposomes (Lip-CTPP) co-modified with p -hydroxybenzoic acid (p-HA) and triphenylphosphonium (TPP) were designed and prepared to co-load doxorubicin (DOX) and lonidamine (LND). Lip-CTPP are promising potential carriers to exert the anti-glioma effect of DOX and LND collaboratively given the following features: 1) Lip-CTPP have a good pharmacokinetic behavior; 2) Lip-CTPP can cross the blood-brain barrier (BBB) and recognize tumor cells through the affinity of p-HA and dopamine/sigma receptors; 3) Lip-CTPP are highly positive charged once the acid-sensitive amide bonds are cleaved in endo/lysosomes to expose TPP and protonate amine groups; 4) the positive charged Lip-CTPP escape from endo/lysosomes and accumulate in mitochondria through electrostatic adsorption; 5) DOX and LND are released and synergistically increase anti-tumor efficacy. Our in vitro and in vivo results confirmed that Lip-CTPP could greatly elevate the inhibition rate of tumor cell proliferation , migration and invasion, promote apoptosis and necrosis, and interfere with mitochondrial function. In addition, Lip-CTPP could significantly prolong the survival time of glioma bearing mice, narrow the tumor region and inhibit the infiltration and metastasis capability of glioma cells. Collectively, Lip-CTPP are promising nano formulations to enhance the synergistic effect of DOX and LND in glioma treatment.
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Journal of Energy Storage
·
2023
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IF 9.4
Fengzhao Hua,Yunqiang Zhang,Shilei Cao,Mei Li,Laiying Jing,Jiaxi Cui
Conductive polyaniline (PANI) is considered as a promising cathode material for aqueous zinc-ion batteries (AZIBs) due to its reversible redox properties. In this study, we prepared a binder-free PANI ( β PG-PANI-6) cathode co-doped with β -naphthalene sulfonic acid ( β -NSA), HClO 4 , and graphitic acid (GA) via a layer-by-layer self-assembled electro-polymerization method. As a soft template, β -NSA micelles can be doped with HClO 4 into PANI nanoparticles to prevent the tight accumulation of PANI chains. Moreover, β -NSA and GA adsorbed on the surface of PANI nanoparticles through layer-by-layer self-assembly contain abundant weak acid groups, which can act as internal proton reservoirs to offer protons to guarantee high redox activity. During the electro-polymerization process, the flexible GA matrix which forms N O bond closely with PANI can alleviate the volume expansion effect of PANI. As a result, the β PG-PANI-6 cathode can obtain superior discharge specific capacity (560.5 mAh/g, 0.2 A/g), excellent rate performance (251.3 mAh/g, 10 A/g). It is commendable that the AZIBs assembled by β PG-PANI-6 cathode deliver ultra-high energy density and power density (535.31 Wh/kg @ 187.16 W/kg, 184.45 Wh/kg @ 7378.01 W/kg). This study expands the doping chemistry of PANI and advances the development of conducting polymer for AZIBs to a new level.
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