Advanced Healthcare Materials
·
2021
·Vol. 11
·期 2
·2101849
·
IF 9.933
Yang Li,Rongzhan Fu,Zhiguang Duan,Chenhui Zhu,Daidi Fan
Bacterial infection and oxidative stress are two critical problems for chronic infected wound healing. Here, molybdenum disulfide nanosheets (MoS 2 NSs) with triple enzyme-like activities are loaded onto carbon nanotubes (CNTs) and incorporated into multifunctional hydrogels aiming to eradicate bacteria and eliminate free radicals. The nanozyme activities of MoS 2 are significantly enhanced through CNTs and near-infrared irradiation. The hydrogel exhibits significant antibacterial performance attributed to the peroxidase-like activity (catalyzing hydrogen peroxide (H 2 O 2 ) into hydroxyl free radicals (•OH)) under acidic conditions, glutathione loss, and photothermal therapy. Additionally, the nanozyme can mimic the superoxide-like activity to transform the superoxide radicals (O 2 •− ) into H 2 O 2 and oxygen (O 2 ), then H 2 O 2 is further depleted into O 2 via the catalase-like activity, benefitting from which and •OH scavenging ability, the hydrogel shows excellent scavenging free radical ability in neutral environment and provides abundant O 2 for wound healing. The multifunctional hydrogel, crosslinked by dynamic boron ester bonds, exhibits adhesiveness, self-healing, and shape-adaptivity, which can fill the cavity of irregular wounds and promote the nanozyme to play the role with maximum efficiency. The hydrogels notably accelerate the skin reconstruction through killing bacteria, clearing ROS, promoting collagen deposition and angiogenesis.
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OPTICAL MATERIALS
·
2021
·
IF 3.08
Xue Li,Li-Juan Jian,Li Wang,Rong-Han Liu,Yun Zhao,Jiang-Tao Chen,Yan Li
Strategy of designing new-structured semiconductor photocatalysts with great electron-hole pairs separation is meaningful for improving the photocatalytic pollution abatement. Herein, on the basis of decahedral BiVO 4 with largely exposed (040) crystal facet, p-n hetero-nanostructured NiS@(040)-BiVO 4 catalysts with various molar ratio of NiS were fabricated by a facile two-step hydrothermal method to study the photo-degradation activities under visible-light irradiation. To photo-degrade anion methyl orange (MO), cation rhodamine B (RhB) and tetracyclines (TC), such nanostructures can all exhibit excellent photocatalytic activities . Compared with pure (040)-BiVO 4 and NiS nanoparticles , 0.6 M ratio of NiS@(040)-BiVO 4 possesses 8.6, 8.9 and 6.5 times higher photocatalytic capacity (MO: 98.6%, RhB: 99.1%, TC: 98.4%) and 49.2, 64.2 and 27.7 times faster photocatalytic rate (MO: 8.4060 h −1 , RhB: 8.2854 h −1 , TC: 7.6230 h −1 ). Detailed analyses show the superior light-harvesting, higher photocurrent response, excellent charge separation and improved charge transport properties are the main factors resulting the high efficient photocatalytic performance of NiS@(040)-BiVO 4 nanostructures. Besides, the forming of facet isotype heterojunctions between (040) and (220) lattice planes in BiVO 4 can also help to get more active photo-induced electrons for photocatalysis .
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PHYSICA B-CONDENSED MATTER
·
2021
·
IF 2.436
Xin Liu,Xinyu Li,Xiang Li,Qiulian Li,Daoyong Zhang,Na Yu,Shurong Wang
Cu 2 SnS 3 (CTS) thin films are prepared by sulfurizing CTS precursor films which are obtained using a sol-gel technique in air atmosphere. The effect of the sulfurization time on the properties of CTS thin films and solar cells is investigated. The uniform and dense CZT thin film is obtained by sulfuring at 575°Cfor 20 min. The corresponding solar cell shows the highest power conversion efficiency (3.68%), with a short-circuit current density (J sc ) of 30.25 mA/cm 2 , an open circuit voltage (V oc ) of 254 mV, a fill factor (FF) of 47.9%, and a peak external quantum efficiency (EQE) of 70%.
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ACS ES&T Engineering
·
2021
·
IF 0
Shenyu Lan,Chuan Yu,Enya Wu,Mingshan Zhu,Dionysios D. Dionysiou
Ambient water motions presented in urban drainage systems is a rich source of renewable mechanical energy. Harvesting this energy to trigger the generation of reactive oxygen species (ROS) for water purification is a desirable yet underexplored solution. Herein, the water flow from a spiral reactor to simulate pipeline drainage was utilized to provide mechanical energy to power itself to initiate the piezo-response of molybdenum disulfide (MoS2) that was added into water flowing in the reactor. The piezocatalytic degradation efficiency of benzothiazole by MoS2 reached 94.8% after 24 cycles (ca. 144 s), which was 8.8 and 4.9 times higher than that of quiescent solution of MoS2 and non-piezoelectric commercial MoS2, respectively. Furthermore, the water flow-driven system can be extended to degrade different kinds of organic contaminants, including benzotriazole and various antibiotics (enrofloxacin, ciprofloxacin, metronidazole, etc.). All target pollutants were degraded with electric energy per order EEO in the range of 0.0161 to 0.0616 kW h/m3. In this process, the running water from the spiral reactor drove MoS2 to generate piezoelectric charges, which in turn reacted with dissolved oxygen and water to generate ROS including the hydroxyl radical, superoxide anion, and singlet oxygen to decompose the target pollutants. The system retained piezo-degradation efficiencies (>80%) in different aqueous matrices including rainwater, saline water, and pharmaceutical sewage and could be reused four times maintaining a good performance (>90%). This investigation provides a facile self-powered piezocatalytic process by harnessing ambient energy from the water flow of simulated water drainage to purify wastewater.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Lingjue Sun,Dongsheng Xu,Yuan Shen,Jacques Crommen,Qiqin Wang,Zhengjin Jiang
Zwitterionic super-hydrophilic polymeric monoliths showed fascinating attributes because of their excellent biocompatibility, hydrophilicity, and antifouling properties. However, their commercial developments are limited by their tedious preparation process and unsatisfactory performance. 1-Carboxy- N -methyl- N -di(2-methacryloyloxyethyl)methanaminium inner salt (CBMAX), an important zwitterionic functional monomer , which exhibits excellent hydrophilicity and extremely low protein adsorption from undiluted serum. However, no carboxybetaine based monolith has been reported to date. In this study, a rapid photo-assisted generation strategy based on a sole-monomer system (CBMAX being simultaneously used as monomer and crosslinker) was proposed for preparing versatile hyper-crosslinked zwitterionic carboxybetaine polymers in capillaries within only 5 min. It is significantly faster than the conventional sole-monomer (1 h) and multi-monomer system (over 12 h) via thermally-initiated polymerization approach. Moreover, a high column efficiency of 82,000 plates/m, abundant electrostatic and hydrophilic interactions were achieved on the novel monolith due to the unique advantages of carboxybetaine. These excellent features were beneficial for the high-performance separation of various bioactive compounds (including nucleotide bases, phenols, benzoic acid and its derivatives, urea and allantoin) on this monolith. It is worth noting that this zwitterionic monolith exhibited good anti-protein adsorption ability as well as excellent enrichment capacity for N -glycopeptides from hIgG tryptic digest. In summary, the proposed photo-assisted generation strategy based on sole-monomer CBMAX is very successful and opens up a promising solution for the commercial development of zwitterionic super-hydrophilic polymeric monoliths.
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Solar RRL
·
2021
·Vol. 6
·期 1
·2100778
·
IF 8.582
Hongling Guo,Rutao Meng,Long Hu,Chun-Ho Lin,Yali Sun,Yue Liu,Jianyu Wu,Zhan Shen,Dewei Chu,Gang Wang,Li Wu,Guangxing Liang,Shifu Xiong,Fangfang Liu,Yi Zhang,Tom Wu
In spite of the merits such as Earth abundance and high performance, Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells suffer from unfavorable Sn Zn antisite defects and complexes, which act as nonradiative recombination centers and deteriorate the open-circuit voltage ( V OC ). Therefore, the management of Sn composition is the prerequisite for achieving high-efficiency CZTSSe photovoltaic devices. At present, the Sn-related composition and defect modifications at different selenization pressures remain unclear, which restrain the development of efficient kesterite solar cells. Herein, a facile yet effective strategy to accurately adjust the Sn content in CZTSSe films by simply optimizing the selenization pressure is demonstrated. Compared with the widely used atmospheric pressure, it is unveiled that the appropriate negative pressure (0.7 atm) can tailor the optimal Sn content in the absorber layer, influencing both the Sn-related defects and the microstructures. In contrast, a lower (0.4 atm) and a higher (1.3 atm) selenization pressure results in undesirable deep Cu Sn defects and a Sn(S,Se) 2 secondary phase, respectively. A champion device fabricated at this optimal selenization pressure (0.7 atm) exhibits a power conversion efficiency of 11.32% with a V OC of 0.496 V. This study paves the path toward highly efficient kesterite solar cells by tailoring the composition-dependent defects.
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ACS Nano
·
2021
·
IF 15.881
Hanpeng Liu,Jianfang Li,Xiangmei Liu,Zhaoyang Li,Yu Zhang,Yanqin Liang,Yufeng Zheng,Shengli Zhu,Zhenduo Cui,Shuilin Wu
Large doses and long duration are often required for herbal medicines to kill bacteria effectively. Herein, a photoacoustic interfacial engineering strategy was utilized to endow curcumin (Cur, a kind of herbal medicine) with rapid and highly effective bacteria-killing efficacy, in which Cur was combined with CuS to form a hybrid material of CuS/Cur with tight contact through in situ nucleation and growth on the petaloid CuS surface. Due to the different work functions of CuS and Cur, the interfacial electrons were redistributed, i.e., a large number of electrons gathered on the side of CuS. In contrast, the holes gathered on the side of Cur after contact. An internal electric field was formed to drive the excited electrons to transfer from CuS to Cur, thus enhancing the separation of electron–hole pairs. Besides exerting the drug nature of Cur itself, the CuS/Cur hybrid also had photo–sono responsive ability, which endowed the hybrid with photothermal, photodynamic, and sonodynamic effects. Therefore, this Cur-based hybrid killed 99.56% of Staphylococcus aureus and 99.48% of Escherichia coli under 808 nm near-infrared light irradiation and ultrasound successively for 15 min, which was ascribed to the synergy of ROS, hyperthermia, and released Cu2+ together with the drug properties of Cur. This work provides a strategy to enhance the therapeutic effects of herbal medicines against pathogenic bacterial infections by exciting the intrinsic properties of herbal medicines as materials through a photo–sono interfacial engineering strategy.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jiapeng Liu,Huibin Liu,Wenchao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
Monolayer MoS 2 (WS 2 ) nanosheets have triggered tremendous interest due to their fascinating unique properties, but high-yield production of single-layer MoS 2 (WS 2 ) still remains an enormous challenge and of great interest. Herein, we report a facile efficient partial etching strategy to tailor thickness and lateral size of MoS 2 (WS 2 ) so as to increase the fraction of edges, which remarkably enhanced the yield of monolayer MoS 2 (20%) and WS 2 (12%) nanosheets by liquid phase exfoliation. As a proof of concept, the exfoliated monolayer MoS 2 (WS 2 ) nanosheets were applied as the cocatalysts for photocatalytic hydrogen evolution . Notably, the optimized hybrids exhibit excellent hydrogen evolution performance, which are over 31-fold (MoS 2 /CdS) and 47-fold (WS 2 /CdS) higher that of bare CdS counterpart, respectively. Hence, this work not only may pave the new way for the high-yield production of transition-metal dichalcogenides monolayers by liquid phase exfoliation, but also provide the possibility for the further efficiently exfoliating other two-dimension layered materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Feifei Xu,Jianghong Zhao,Jianlong Wang,Taotao Guan,Kaixi Li
High activity trifunctional non-noble electrocatalysts , targeting oxygen reduction reaction (ORR), hydrogen evolution reaction (HER), and oxygen evolution reaction (OER), are rationally designed by integrating the merits of both Co 9 S 8 nanoparticles and carbons nanosheets . Herein, Co 9 S 8 loaded with S, N co-doped carbon core–shell catalyst (Co 9 S 8 @SNC) was reasonably designed and synthesized by using the strong coordination effect between Co 2+ and C S at the molecular level. The significant synergistic effect between the S, N co-doped carbon shell and Co 9 S 8 core endows the catalyst with excellent catalytic performance for ORR, HER, and OER reactions. The carbon shell enhances the conductivity of the hybrid material , while the Co 9 S 8 core provides the main catalytic active sites. More specifically, the half-wave potential for ORR is 0.846 mV, and the overpotential at 10 mA cm −2 for OER and HER are 320 mV and 170 mV, respectively. To test its practical application, zinc-air battery assembled by Co 9 S 8 @SNC shows a high power density of 239 mW cm −2 , excellent rechargeability, and long cyclic stability. This work provides a promising and extensible method to in-situ synthesize core–shell metal sulfides loaded S, N co-doped carbon composites, which can be a promising candidate for electrocatalytic material in energy storage and conversion devices.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lixiong Xu,Yifan Yang,Chenyue Li,Rongqian Ning,Jun Ma,Mengqin Yao,Shuo Geng,Fei Liu
The electrocatalytic glycerol oxidation reaction (GOR) is an efficient way to reduce the overpotential of the anodic reaction of electrocatalytic water splitting with abundant high-value byproducts. However, it has always been difficult to reveal a clear reaction path and real active site during the electrocatalytic glycerol oxidation reaction (GOR) process. In this work, NiOOH/Ni 3 S 2 /NF, a model catalyst was synthesized by the two-step method, and the reaction path of the electrocatalytic oxidation of glycerol on NiOOH/Ni 3 S 2 /NF was clearly unveiled by the in situ infrared and Raman analysis. In addition, the TEM after GOR and in-situ Raman intuitively demonstrated that the NiOOH was the real active site during the GOR process. Consequently, the synthesized NiOOH/Ni 3 S 2 /NF catalyst achieved a current density of 10 mA cm −2 at 1.227 V vs . RHE and obtained a high formic acid Faraday efficiency of 97.7 % at a low potential of 1.4 V vs . RHE. This work demonstrates an effective method for unveiling the GOR mechanism and the other relevant electrocatalytic reaction processes.
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CHINESE JOURNAL OF CATALYSIS
·
2023
·
IF 16.5
Feng Li,Xiaolong Tang,Zhuofeng Hu,Xiangming Li,Fang Li,Yu Xie,Yanbin Jiang,Changlin Yu
Hydrogen peroxide (H 2 O 2 ) is a green oxidant that is widely used in daily life and industry. Artificial photocatalytic synthesis of H 2 O 2 is a green and sustainable scheme, but the high complexation rate of electron-hole pairs during photocatalysis and the low activation capacity of the catalyst for O 2 greatly inhibit the oxygen reduction reaction. Herein, the first synergistic modification of In 2 S 3 using ion doping and vacancy modulation is used in this paper. An In 2 S 3 -based photocatalyst containing S vacancies and Ga 3+ ions is designed and synthesized. After continuous irradiation under visible light ( λ ≥ 420 nm) for 1 h, the H 2 O 2 concentration of the system reaches 352.58 μmol L –1 , which is 7.5 times than that of pure In 2 S 3 , and the apparent quantum yield at 450 nm is 4.64%. Appropriate concentrations of S vacancies promoted O 2 adsorption, and theoretical calculations demonstrates that Ga 3+ ions and S vacancies synergistically promote O 2 activation and more favorable for 2e – oxygen reduction reaction. All these phenomena facilitate H 2 O 2 generation. Furthermore, ESR analysis and radical trapping experiments show that the interaction between superoxide anion radicals (•O 2 – ), singlet oxygen ( 1 O 2 ), h + , and proton donor (isopropanol) in the solution phase plays a key role in the photocatalytic synthesis of H 2 O 2 , which has been largely neglected in previous studies. We suggest that the S vacancy-regulated Ga 3+ ion-doped In 2 S 3 catalyst could provide a reference for the design of high-performance materials for the photocatalytic production of hydrogen peroxide.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Haiming Fan,Liuyang Yang,Dalei Zhang,Huiliang Wu,Yuhui Yang,Zhiyi Wei,Xiaonan Huang,Yefei Wang,Songda Liu
Environmental-friendly epoxy (EP) composite coatings are regarded as distinguished candidates for preventing metal corrosion. In this paper, we synthesized a novel GO-PDA-MoS 2 /EP nanocomposite coating system by modifying dopamine (PDA) functionalized graphene oxide (GO) with MoS 2 . Here, the effect of different MoS 2 additions on the corrosion resistant properties of coatings was investigated by altering the ratio of MoS 2 to GO-PDA via electrochemical measurements, long-duration immersion experiments, and water contact angle tests. The results indicated that 0.3 wt .% MoS 2 can substantially enhance the interfacial compatibility between EP and GO-PDA and the GO-PDA-MoS 2 -0.3 wt .%/EP coating presented optimum corrosion resistant properties. Specifically, the impedance modulus (|Z|) of the GO-PDA-MoS 2 -0.3 wt .%/EP coating still reached 2.36 × 10 7 Ω·cm 2 after 30 days immersed, which was two orders of magnitude higher than pure EP coatings. This work demonstrates a novel economical and environmental scheme that MoS 2 can be employed to enhance the corrosion resistant properties and improve the interfacial interactions of EP coatings.
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