Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 23
·8983-8988
·
IF 8.262
Yu Liu,Xuehui Gao,Zhanglian Hong,Weidong Shi
Uniform nitrogen-doped C/Ni/TiO2 hollow spindles were successfully prepared with Ni nanoparticles encapsulated into the hollow N-doped TiO2/C matrix. This intriguing architecture not only exhibits favorable conductivity, but also provides a large quantity of accessible active sites for lithium ion insertion, thus contributing to superior lithium storage properties.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 24
·22297-22311
·
IF 2.22
Guan Yiyin,Liu Wenjie,Zuo Shixiang,Yuan Kun,Wu Fengqin,Ji Jinjin,Yao Chao
In this paper, rutile phase titanium oxide/Sb-SnO 2 /anatase phase titanium oxide (TiO 2 (R)/C-TiO 2 (A)) heterostructured nanocomposites were prepared by a sol–gel method and a hydrothermal method. By optimizing the mass ratio between TiO 2 (R) and C-TiO 2 (A), the rod-ball heterostructures of TiO 2 (R)/C-TiO 2 (A) were formed and exhibited enhanced simulated sunlight-driven photocatalytic desulfurization performance. According to the results, the desulfurization rate of TiO 2 (R)/C-TiO 2 (A) was 93.98% after 60 min, which is higher than C-TiO 2 (A) and TiO 2 (R)/TiO 2 (A). In addition, the photocatalytic recyclability test indicated that after three times the reuse of TiO 2 (R)/C-TiO 2 (A) could still reach 85.98%. The enhanced photocatalytic performance could be attributed to the double Z-scheme heterojunction in the TiO 2 (R)/C-TiO 2 (A) and the uniformly structure of rod array, which resulted in the higher separation efficiency of electrons and holes. Furthermore, the results of photocatalytic active radical species trapping experiments showed that the main substances in the photocatalytic reaction are ∙O 2 − and h + . This paper also established the double Z-scheme heterojunction reaction mechanism.
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ENERGY & FUELS
·
2022
·
IF 4.654
Difeng Wei,Xuexian Yu,Yingwu Luo,Xiang Gao,Sainan Ma
Silicon monoxide (SiO) is a promising anode material for the next-generation lithium-ion batteries (LIBs) due to its higher capacity than graphite and better cycle life than pure silicon. However, the issues of volume changes, low mass loading, and poor conductivity still exist. In this study, an economic battery manufacturing technique is developed to promote the performance of commercial SiO/C-based batteries. A novel triblock copolymer binder was synthesized and used to relieve the volume changes and improve ion transportation. Copper nanowires were adopted in the anode material to improve electrical conductivity. A high mass loading anode with a laminated conductive structure was fabricated by spraying a layer upon layer. The synthesized SiO/C exhibits a high specific capacity retention of 606 mA h g–1 after 200 cycles at a high areal mass loading of 10.26 mg cm–2. Furthermore, under a current density of 1 C (1255 mA g–1), it delivers a reversible rate capacity of 620 mA h g–1. This novel design paves a new way to fabricate high-performance SiO-based anodes for commercial LIB applications.
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Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 36
·18863-18871
·
IF 11.301
Ye Xiong,Lulu Xu,Caixia Yang,Qingfeng Sun,Xijin Xu
Adjusting the electromagnetic parameters by decorating magnetic particles for improved impedance matching is an important strategy for obtaining lightweight and efficient carbon-based electromagnetic wave-absorbing materials. In this work, a tomato-like hierarchical porous FeCo/C@WC was prepared for efficient microwave absorption, in which a lightweight anisotropic wood carbon aerogel (WC) was used as a structural assistant, and a MOF-derived graphitized carbon-coated FeCo alloy (FeCo/C) served as a dielectric/magnetic regulator. The tomato-like polystage micro-nano construction was made up of a “pericarp” left by the parallel channels of natural wood, a “pulp tissue” of the MOF-derived nanocage and “seeds” of FeCo nanoalloys embedded in a nanocage. The macroporous wooden shell and mesoporous carbon nanocage gave the composite an excellent hierarchical dielectric coupling network. Meanwhile, the uniformly dispersed FeCo nanoparticles enhanced the magnetic loss to the carbonaceous substrate, allowing for better impedance matching. As a result, the constructed multidimensional FeCo/C@WC exhibited superior wave absorbing ability, in which the maximum reflection loss (RL) reached −47.6 dB and the wide absorption bandwidth was up to 8.9 GHz. These excellent results confirmed that wood-based electromagnetic absorption devices may have a good application prospect.
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COMBINATORIAL CHEMISTRY & HIGH THROUGHPUT SCREENING
·
2024
·Vol. 27
·期 13
·1919-1929
·
IF 1.6
Zhang Fei,Chu Mingliang,Liu Jiemin,Zhao Qi,Zhu Yanqiu,Wu Xuefang
Aim: The study aimed to study the potential roles and mechanisms of shikonin in gastric cancer by network pharmacology and biological experiments. Methods: The key genes and targets of shikonin in gastric cancer were predicted by network pharmacology and molecular docking study.
The effect of shikonin on the proliferation, migration, and invasion of gastric cancer cells was detected by the CCK8 method, and wound healing and transwell assays. The expression levels of c-Myc and Yap-1 were detected via western blotting in gastric cancer cells after shikonin intervention.
Results: The results of network pharmacology revealed the key target genes of shikonin on gastric cancer cells to be c-Myc, Yap-1, AKT1, etc. GO and KEGG analysis showed regulation of cell migration, proliferation, adhesion, and other biological processes, including the PI3K-Akt signaling
pathway, HIF-1 signaling pathway, necroptosis, and other cancer pathways. Molecular docking showed shikonin to be most closely combined with protooncogenes c-Myc and Yap-1. In vitro experiments showed that the proliferation rate, migration, and invasion ability of the gastric cancer cell group
decreased significantly after shikonin intervention for 24h. The expression levels of c-Myc and Yap-1 in gastric cancer cells were found to be significantly decreased after shikonin intervention. Conclusion: This study showed protooncogenes c-Myc and Yap-1 to be the core target genes
of shikonin on gastric cancer cells. Shikonin may suppress gastric cancer cells by inhibiting the protooncogenes c-Myc and Yap-1. This suggests that shikonin may be a good candidate for the treatment of gastric cancer.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuhong Tao,Chengqi Feng,Juncheng Huang,Haining Na,Jin Zhu
Phosphotungstic acid hydrate (HPW)-doped hydroxyl-rich hydrothermal carbon-coated fibrous silica catalyst (FS@C/HPW) is fabricated to induce the highly efficient hydrolysis of cellulose to sugar in an ultra-low acid aqueous system. The obtained FS90@C/HPW12 owns good thermal stability under 200 °C and the highest specific surface area at 28 m 2 /g. Owing to its special fibrous microstructures, FS90@C/HPW12 can cause linear damage and structural fragmentation on the surface of cellulose during hydrolysis. Accordingly, rather highly efficient hydrolysis with the cellulose conversion of 100 %, total reducing sugar and glucose yields at 92.2 % and over 85 % is achieved in the aqueous system with FS90@C/HPW12 and 5 mmol/L H 2 SO 4 . FS90@C/HPW12 also exhibits good reusability in multiple hydrolysis. This research provides a particular way for the design and synthesis of solid catalysts to induce the highly efficient hydrolysis of cellulose to sugar by chemical catalysis in a full aqueous system.
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ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Yueling Cao,Minghui Tang,Mingming Li,Jiang Deng,Fan Xu,Lei Xie,Yong Wang
A novel N-doped carbon supported Rh catalyst was developed via one-pot pyrolysis of chitin and (NH4)3RhCl6. The catalyst exhibited excellent catalytic activity and recyclability for the hydrogenation of benzoic acid to cyclohexane carboxylic acid. Characterization indicated that the high catalytic performance of Rh/N–C-700 is mainly attributed to the proportion of Rh0 to Rh3+ and Rh particle size. More importantly, this novel synthesis strategy significantly increased the interaction between Rh nanoparticles and N-doped carbon in contrast with the conventional impregnation and NaBH4 reduction methods, thus preventing the Rh nanoparticles from migration, aggregation, and leaching from the support surface and therefore improving the reusability of the catalyst. This synthetic method may pave a new way for producing N-doped carbon supported metal catalysts from chitin on a large scale, which is attractive for industrial applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Xuebin Hou,Sarah Louise Stanley,Min Zhao,Jin Zhang,Huimin Zhou,Yibing Cai,Fenglin Huang,Qufu Wei
As the most widely used metal oxide catalysts in photocatalytic degradation, the fast recombination of charge carriers limits the photocatalytic performance of multiform TiO 2 , resulting from its direct-band-gap property. In the present work, we designed C-doped coupled TiO 2 /ZnO nanofibrous membrane based on the derivation of ZnO from the metal organic framework (MOF). The morphology and catalytic properties of the composite membrane could be manipulated by the growth of ZIF-8 crystals. Compared to pristine TiO 2 nanofibers (11.4341 m 2 g −1 ), the composite membrane with an optimized ZnO cubes exhibited larger specific surface area (30.2475 m 2 g −1 ) after introducing ZnO cubes. Furthermore, the crossed-network connection between TiO 2 and ZnO cubes is propitious to increase the synergy of the heterojunction , subsequently effectively inhibiting the recombination of photogenetrated holes and electrons. Benefitting from the trinomial synergistic effect of carbon doping, ZnO and TiO 2 , the as-designed composite membrane exhibited excellent photocatalytic performance to Rhodamine compared to pure TiO 2 nanofibers. This study not only presents the strategy of preparing a C-doped coupled TiO 2 /ZnO composites with crossed network connection for effective photocatalysis , but also exploit the application of MOFs.
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NANOTECHNOLOGY
·
2022
·Vol. 33
·期 50
·505402
·
IF 3.953
Wenjing Yu,Shaohua Zhang,Kun Gao,Xiangyun Lin,Yuyang Han,Zhipan Zhang
Co3O4-MoSe2@C nanocomposite has been prepared by a convenient method via combining hydrothermally synthesized MoSe2@C and Co3O4. When catalyzing the hydrogen evolution reaction and oxygen evolution reaction, the catalyst features low overpotentials of 144 mV and 360 mV (both at 10 mA cm−2 current density), respectively. It can also serve as the cathode in the lithium-oxygen battery and the device shows a low charging-discharging overpotential of 1.50 V with a stable performance of over 200 cycles at current density of 1000 mA g−1, shedding light on the design and synthesis of novel multifunctional electrocatalysts for energy conversions.
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JOURNAL OF ORGANIC CHEMISTRY
·
2021
·
IF 4.354
Ming Li,Jun-Yang Tao,Liang-Neng Wang,Jia-Wei Li,Yue-Jin Liu,Ming-Hua Zeng
Modification of commercially available biaryl monophosphine ligands via ruthenium(II)-catalyzed P(III)-directed-catalyzed ortho C–H secondary alkylation is described. The use of highly ring-strained norbornene as a secondary alkylating reagent is the key to this transformation. A series of highly bulky ligands with a norbornyl group were obtained in excellent yields. The modified ligands with secondary alkyl group outperformed common substituted phosphines in the Suzuki–Miyaura cross-coupling reaction at a ppm mole level of Pd catalyst.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 6
·062501
·
IF 4.386
Chanez Maouche,Yazhou Zhou,Bing Li,Chao Cheng,Zirui Wu,Xue Han,Shaosheng Rao,Yi Li,Nasir Rahman,Juan Yang
Iron-nitrogen-carbon graphitic (Fe-N-C), a noble metal-free catalyst holds a lot of promise to substitute platinum (Pt) as an efficient catalyst in the oxygen reduction reaction (ORR). However, the synthesis process and the stabilization of single atoms that tend to aggregate, without jeopardizing the catalytic activity remain challenging. Here we demonstrate a stabilized assisted method for the preparation of Fe-N-C electrocatalyst by using graphitic carbon nitride (g-C3N4) nanosheet as a template. Fe ions are absorbed on the surface of g-C3N4 and imprisoned after the addition of pyrrole, preventing Fe migration that may result in nanoparticles. During the pyrolysis, Fe atoms coordinated with N provided by g-C3N4 and pyrrole on graphitic carbon to form Fe-N-C with a metal loading of 5.4 wt%. Moreover, FeNx species were introduced in the graphitic carbon, where the coexistence of micro and mesopores were favorable to offer a larger density of active sites compared to Fe/NP without pyrrole. Fe-N-C demonstrated a good electrocatalytic performance with a half-wave potential (E1/2) of 0.82 V (vs reversible hydrogen electrode (RHE)) higher than Fe/NP (0.76 V) and close to Pt/C, with a superior long stability of 85% in alkaline media after 40000 s.
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高影响因子
CARBON
·
2022
·
IF 11.307
Wenjun Huyan,Junru Yao,Jiaqi Tao,Feng Yang,Xuewei Tao,Zhengjun Yao,Jintang Zhou,Zibao Jiao
0D-2D Polydopamine (PDA)-derived carbon nanoparticles @ MXene composites (PCM) with high microwave absorption properties were prepared by in-situ self-polymerization combined with vacuum pyrolysis . As the “nano clothing” of MXene , the moderate accumulation of PDA-derived carbon nanoparticles makes enough interface contact with MXene nanosheets , which not only improves the impedance matching of MXene reasonably but also optimizes the dielectric loss . Based on the multi-dimension structure and multi-component synergistic effect , when the filling amount of the composite is only 7.5 wt% and the thickness is 2.8 mm, the best reflection loss at 10 GHz is −46.92 dB and the maximum effective absorption bandwidth is 7.01 GHz. This work provides a synthesis strategy of crystal/amorphous heterointerface and offers a new way for the preparation of lightweight, broadband, and efficient microwave absorption materials , showing great application potential.
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