JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2023
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IF 8.7
Xiongfang An,Xiaolin Xu,Weijie Guo,Zepu Chen,Zhiyin Miao,Jiayi Yuan,Zhansheng Wu
Significant progress has been made in the development of phosphorus recovery adsorbents and photocatalysts for degradation of pesticides. However, the bifunctional materials for phosphorus recovery and photocatalytic degradation of pesticides have not been designed, and the mechanism of the interaction between photocatalysis and P adsorption remains unexplored. Herein, we develop biochar-g-C 3 N 4 -MgO composites (BC-g-C 3 N 4 -MgO) with bi-function application to minimize water toxicity and eutrophication. The results show phosphorus adsorption capacity of the BC-g-C 3 N 4 -MgO composite reaches 111.0 mg·g-1, and its degradation ratio of dinotefuran reaches 80.1% within 260 min. The mechanism studies show that MgO can play variety roles in BC-g-C 3 N 4 -MgO composite, in which can improve the adsorption capacity of phosphorus, enhance the utilization efficiency of visible light and the separation efficiency of photoinduced electron-hole pairs. The biochar existed in BC-g-C 3 N 4 -MgO serves as charge transporter with a good conductivity, which promotes the fluent transfer of photo-generated charge carriers. The ESR indicates that both • O 2 − and •OH generated from BC-g-C 3 N 4 -MgO are responsible for dinotefuran degradation. Finally, pot experiments reveal that P laden BC-g-C 3 N 4 -MgO promotes the growth of pepper seedlings with high P utilization efficiency of 49.27%.
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PubMed
高影响因子
OPTICAL MATERIALS
·
2022
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IF 3.754
Jinfen Niu,Kai Wang,Lan Yang,Jiahui Shi,Yue Zhang,Fan Yang,Xiaojiao Yu,Binghua Yao
Photocatalysis can be a potential technique for decomposing antibiotics contaminants from water. In this study, g-C 3 N 4 modified Bi/BiOBr nanosphere were prepared by a simple microwave solvothermal method, and the structure-properties relationships of the Z-scheme heterojunction were evaluated in degrading organic dyes. Various characterization techniques were then applied to elucidate the structure-performance relationships of the resulting heterojunction photocatalysts in degrading CIP. Compared with pristine g-C 3 N 4 or Bi/BiOBr, the g-C 3 N 4 @Bi/BiOBr nanocomposites showed heightened property in photocatalytic degradation of CIP. The photocatalytic efficiency of CIP decomposition over the Z-scheme of g-C 3 N 4 @Bi/BiOBr heterojunction was about 2.38 and 1.35 times homologous to those of original g-C 3 N 4 and Bi/BiOBr. The enhancement in photocatalytic activity of g-C 3 N 4 @Bi/BiOBr could be described by the Z-scheme pathway and the SPR effect of Bi 0 , which broadened visible light absorption and promoted the separation of photoinduced carriers. In addition, the effect of typical water matrix factors, such as pH, anionic, and cationic on photodegradation rate were evaluated. Furthermore, results of scavenging experiments showed that ·OH, ·O 2 − , and h + all participate in the degradation of CIP. Based on the band structure and scavenging measurements, a possible photocatalytic mechanism for the as-synthesized g-C 3 N 4 @Bi/BiOBr composites was proposed.
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高影响因子
Applied Materials Today
·
2022
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IF 8.663
Sheng Jie Yuan,Zhong Quan Peng,Min Zhi Rong,Ming Qiu Zhang
To prepare oriented crosslinked liquid crystalline polymers (LCPs) while preventing the unwanted anisotropy, the authors fabricated interlocked networks from liquid crystalline epoxy and amorphous polyurethane, which are crosslinked by reversible Diels-Alder (DA) bonds and Schiff base, respectively. By making use of dynamicity of the reversible bonds as well as relative mobility of the parent networks of the interlocked networks, the material is subjected to stepwise solid-state bi-directional drawing. Owing to the directional alignment of the mesogens and molecular chains and the increased crosslinking density during stretching caused by the networks reshuffling, the strengths of the material in orthogonal directions are simultaneously improved and gradually converged to the values comparable to the reported highest level of unidirectionally orientated crosslinked LCPs. Furthermore, the biaxially oriented interlocked networks have inherited the intrinsic self-healing capability from the included reversible bonds. The proposed method is easy to use and expected to contribute to the practical applications of crosslinked LCPs, which is becoming more and more important in modern microelectronics and communication technology.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 30
·期 11
·28874-28888
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IF 5.19
Zhu Tingting,Hou Yanping,Huang Guofu,Fu Tian,Yang Jinhang,Wang Yutong,Zhang Hanbing
Development of efficient photocatalysts is vital for light-driven removal of refractory antibiotics. Herein, Bi 2 WO 6 microspheres were successfully anchored on the surface of bentonite, and metallic Bi was reduced in-situ by a one-step solvothermal method. Notably, the Bi/Bi 2 WO 6 /BT with a mass ratio of 0.15:1:0.1 exhibited the best photocatalytic activity toward degradation of tetracycline (TC) and ciprofloxacin (CIP) after 120 min of visible light irradiation, and their reaction rate constants were 8.0 and 5.5 folds higher than that of pristine Bi 2 WO 6 , respectively. The boosted photocatalytic activity over Bi/Bi 2 WO 6 /BT was ascribed to the establishment of electrostatic repulsion and SPR effect, which synergistically promoted charges transfer, thus achieving more h + and ·O 2 − radical generation. Moreover, possible TC and CIP degradation pathways over Bi/Bi 2 WO 6 /BT were proposed based on the identified intermediates, and most of the intermediates were less toxic than TC and CIP. The study provides options to develop high-efficiency photocatalytic composites for contaminants elimination using semiconductors and readily available bentonite.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Weihua Qin,Mingye Ren,Yuwei Lu,Shaoxia Yang
The two-stage fixed-bed reactor significantly enhanced the phenol degradation efficiency in the heterogeneous Fenton-like reaction. The Cu/Bi-Ce/Al 2 O 3 catalyst, prepared by impregnation-precipitation method, exhibited favorable phenol removal, and the phenol degradation efficiency was ∼32.6 % higher in the two-stage fixed-bed reactor than that in the one-stage fixed-bed reactor under optimal parameters. Moreover, the Cu/Bi-Ce/Al 2 O 3 catalyst had excellent stability in the Fenton-like reaction due to the bismuth doping in the catalyst inhibiting the dissolution of copper ion. The Cu/Bi-Ce/Al 2 O 3 catalyst also displayed efficient purification ability for phenolic municipal sewage in the two-stage fixed-bed reactor. The redox cycles of Cu 2+ /Cu + and Ce 4+ /Ce 3+ were evidenced coexist to enhance the catalyst activity. The quenching experiments demonstrated that the generated singlet oxygen and superoxide anion free radicals dominated the degradation of phenol in the heterogeneous Fenton-like reaction over the Cu/Bi-Ce/Al 2 O 3 catalyst. This study may provide a novel heterogeneous Fenton-like/H 2 O 2 system for degrading organic pollutants in the fixed-bed reactor.
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Applied Materials Today
·
2022
·
IF 8.663
Shaohua Wu,Wenwen Zhao,Mingchao Sun,Peng He,Hongyu Lv,Qiuyu Wang,Shuo Zhang,Qian Wu,Peixue Ling,Shaojuan Chen,Jianwei Ma
The clinical treatment of chronic wounds caused by different pathophysiological ulcers like diabetic ulcers still remains a bottleneck. Although numerous approaches have been designed and developed, their therapeutic effects cannot meet the medical needs due to the complicated pathological microenvironment and restricted regenerative capacity of hard-healing chronic wounds. In this study, novel bi-layered and multifunctional dressing patches constructed with one layer of electrospun methacrylated gelatin (MeGel)/poly (L-lactic acid) (PLLA) radially-oriented nanofiber mats (RNMs) and one layer of Salvia miltiorrhiza Bunge-Radix Puerariae herbal compound (SRHC)-loaded MeGel hydrogel were designed to promote the closure and healing of diabetic wounds. An innovative electrospinning method was firstly designed and implemented to generate MeGel/PLLA RNMs, which were demonstrated to be a more appropriate nanofiber pattern for effectively guiding migration and promoting proliferation of human dermal fibroblasts (HDFs) compared with the conventional electrospun MeGel/PLLA haphazardly-oriented nanofiber mats (HNMs) and MeGel/PLLA uniaxially-oriented nanofiber mats (UNMs). Importantly, the in vivo mice acute full-thickness defect models also confirmed that MeGel/PLLA RNMs could significantly promote the cell migration and accelerate the healing rate throughout providing the cell recruitment and regulation abilities in comparison with MeGel/PLLA HNMs and UNMs. The MeGel hydrogel precursors loaded with different concentrations of SRHC were employed to generate the hydrogel layers on the MeGel/PLLA RNMs, and therefore a series of bi-layered wound dressing patches with integrated multifunctional properties were fabricated. All the bi-layered wound dressing patches with or without SRHC showed excellent hemostatic performances. The bi-layered dressing patches containing SRHC exhibited great antibacterial property to both E. coli and S. aureus , and also high cell survival rate to HDFs. For the in vivo full-thickness diabetic wound healing test, the bi-layered dressing patches without SRHC exhibited a faster wound healing rate compared with the medical gauzes. Furthermore, the 10% SRHC loaded bi-layered dressing patches significantly accelerated the high-quality regeneration and healing of diabetic wounds by effectively reducing the inflammation, promoting the vascularization, and facilitating the regeneration of hair follicles. Specifically, the 10% SRHC loaded bi-layered dressing patches presented a high healing area of 97.4 ± 2.8% at day 18 after surgery. Our present study demonstrated that the SRHC contained bi-layered dressing patches show great potential for the treatment of hard-healing diabetic wounds.
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高影响因子
Journal of Cleaner Production
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2022
·
IF 11.072
Junfeng Miao,Zuozhao Zhai,Shasha Wang,Yuelong Xu,Shichao Du,Xiaolei Wang,Xiaoxi Dong,Bin Ren,Zhenfa Liu
The hierarchical porous nitrogen-doped two-dimensional carbon (HNGC) was prepared by simple calcination of magnesium sulfate (MgSO 4 ) and self-synthesized nitrogen-doped two-dimensional graphene-like carbon at a mild temperature in oxygen. The influence MgSO4 on the morphology, structure and chemical composition of the prepared HNGC samples were studied using scanning electron microscopy, transmission electron microscopy , X-ray diffraction, Raman spectroscopy , surface area analysis, X-ray photoelectron microscopy and elemental analyzer. HNGC-2 exhibited a uniform three-dimensional coral-like porous inter-connected structure, large specific surface area, high pore volume, and no loss of nitrogen content. HNGC-2 demonstrated an excellent rate capability of 62.8% at 20 A g −1 , outstanding stability of 96.1% following 5000 cycles and the assembled symmetric supercapcitor achieved 12.5 Wh kg −1 at a 350 Wkg -1 and 7.5 Wh kg −1 at 3500 Wkg -1 . The novel method was also found to be effective for facilitating the electrochemical performance of commercial biomass active carbon. In addition, HNGC-2 was used for the photo-catalytic degradation of methylene blue and over 99% of methylene blue was successfully degraded under 25-min visible irradiation in the presence of potassium persulfate. The enhanced electrochemical performance and the excellent photo-catalytic performance of HNGC-2 indicated that porous carbon can be successfully activated using an appropriate oxidation strategy.
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高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Yuting He,Hongtao Li,Yi Wang,Yufei Jia,Yongning Liu,Qiang Tan
M−N−C (M = Fe, Co, Ni, etc.) catalyst owns high catalytic activity in the oxygen catalytic reaction which is the most likely to replace the Pt-based catalysts. But it is still a challenge to further increase the active site density. This article constructs the high-efficiency FeMn-N/S-C-1000 catalyst to realize ORR/OER bifunctional catalysis by hetero-atom, bimetal (Fe, Mn) doped simultaneously strategy. When evaluated it as bi-functional electro-catalysts, FeMn-N/S-C-1000 exhibits excellent catalytic activity ( E 1/2 = 0.924 V, E j =10 = 1.617 V) in alkaline media, outperforms conventional Pt/C, RuO 2 and most non-precious-metal catalysts reported recently. Such outstanding performance is owing to N, S co-coordinated with metal to form multi-types of single atom, dual atom active sites to carry out bi-catalysis. Importantly, nitrite poison test provides the proof that the active sites of FeMn-N/S-C are more than that of single-atom catalysts to promote catalytic reactions directly. To better understand the local structure of Fe and Mn active sites, XAS and DFT were employed to reveal that FeMn-N 5 /S-C site plays the key role during catalysis. Notably, the FeMn-N/S-C-1000 based low-temperature rechargeable flexible Zn-air also exhibits superior discharge performance and extraordinary durability at −40 °C. This work will provide a new idea to design diatomic catalysts applied in low-temperature rechargeable batteries.
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高影响因子
Journal of Energy Storage
·
2023
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IF 9.4
Rui Wang
Zinc-bromine flow battery (ZBFB) is one of the most promising energy storage technologies due to their high energy density and low cost. However, their efficiency and lifespan are limited by ultra-low activity and stability of carbon-based electrode toward Br 2 /Br − redox reactions. Herein, chitosan-derived bi-layer graphite felt (CS-GF) with stable physical structure and abundant active sites is proposed and developed as cathodes for ZBFBs. In this uniquely developed electrode, the catalyst layer possesses oxygen and nitrogen co-doped surface enables high activity for redox reaction, whilst the wrapping structure enhances bonding force between catalyst layer and supporting layer to keep the stability against electrolyte flow. Moreover, the closely-bonding and partially-cracked catalyst layer ensures low electrical resistance between two layers and further emerges more inside active sites for bromine ions reactions. Consequently, the bi-layer electrode is demonstrated high electrochemical activity towards bromine ion redox reactions by cyclic voltammetry and electrochemical impedance spectra test. In battery charge-discharge measurements, a ZBFB employing CS-GF electrode yields a high current density of 120 mA cm −2 , with an ultra-high coulombic efficiency of 99 % and improved energy efficiency of 69 %. Furthermore, the proposed bi-layer electrode enables stable battery performance, which cycle for more than 100 cycles with minor 0.057 % energy efficiency decay per cycle. This work provides a promising strategy to develop high-activity and high-stability electrode that possesses great application potentials in ZBFBs and other energy storage systems .
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Qian Li,Jing Hu,Haiqiang Wang,Zhongbiao Wu
Limited light absorption and severe charge recombination have been widely acknowledged as the two main obstacles restricting the application of P25 in NO photocatalytic conversion. In this work, an advanced heterojunction photocatalyst of Bi/BiOI/black TiO 2 was synthesized via an in-situ solid-state chemical reduction method. The black TiO 2 extended the light absorption to the full spectral region. It constructed a direct Z-scheme heterojunction with BiOI nanosheets, not only promoting the charge separation, but also preserving the strong oxidation ability of photogenerated holes in black TiO 2 and strong reducing ability of photogenerated electrons in BiOI. Thus, more •O 2 − and •OH radical could form when Bi/BiOI/black TiO 2 was subjected to visible light irradiation. Besides, the introduced Bi metal nanoparticles could also enhance the light utilization and served as a cocatalyst to accept the electrons. Therefore, enhanced NO photocatalytic oxidation activity was obtained, with the optimal sample Bi/BiOI/black TiO 2 exhibiting a high NO conversion efficiency of ~70% and NO x removal of ~45%. This work may provide a refreshing perspective for the design of heterojunction photocatalysts for efficient NO photocatalytic purification and other photocatalytic applications.
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高影响因子
SOLAR ENERGY
·
2020
·
IF 4.608
Nasir Ali,Sanam Attique,Sajid Rauf,Xiaoyu Wang,Amir Khesro,Shahid Ali,Muhammad Imran Asghar,Shikuan Yang,Peter D. Lund,Huizhen Wu
Bismuth is considered as one of the most promising candidates to replace Pb in the organo-lead halide perovskite, a classical material for various optoelectronic applications. When utilized in a photovoltaic cell, the performance of the cell drops due to deterioration in the absorber film and the changes in its crystal structures. In this work, a small amount of dodecylammonium chloride, C 12 H 25 NH 3 Cl (DCl) is added into Cs 3 Bi 2 I 9 (CBI), resulting in a pinhole-free high-quality perovskite (PVK) film via a single-step solution processability, also confirmed by FTIR and XPS analyses. Structural, optical, and microscopic analyses showed that the quality, surface features, and crystallinity of the CBI films are significantly improved by adding DCl. The prepared films are successfully demonstrated in a solar cell and exhibited considerably improved photovoltaic (PV) characteristics (V OC by ~47%, J SC by ~33%, FF by 13%, and PCE by 115%) over pure CBI-based devices. Moreover, the PV device retained more than 95% of its initial PCE in the ambient laboratory environment (relative humidity 55±5%). To the best of our knowledge, this is the highest PCE along with extended environmental stability reported for solution processed CBI-based perovskite solar cells.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Chun Chen,Ruoyu Fan,Miaomiao Han,Xiaoguang Zhu,Yunxia Zhang,Haimin Zhang,Huijun Zhao,Guozhong Wang
A green process for production of imine and secondary-amine with high selectivity is desirable and challenging. Here, selective production of these nitrogen-containing compounds in one-pot was effectively realized in a hydrogenation-coupling tandem reaction system catalyzed by bi-metallic NiCo catalyst. The investigation of Co/Ni composition vs activity showed a composition-dependence catalysis and the optimal bi-metallic catalyst was NiCo 5 (Ni and Co molar ratio 1:5). Nitrobenzene (NB) could almost completely transform toward imine at 70 °C and secondary-amine at 90 °C, respectively. The adsorption configurations of reactant on catalyst surface were analyzed by DFT calculation to probe the reaction mechanism. And the reaction dynamics were also investigated deeply, suggesting that hydrogenation of NB should be promoted but hydrogenation of benzaldehyde (BA) need inhibiting. Additionally, the catalytic system under moderate reaction conditions could also be applied to a variety of substituted aromatic nitro and aldehyde compounds, showing high yields of corresponding imines.
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高影响因子
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