COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Zujiang Liu,Xuehua Yuan,Tianhao Chen,Chongqing Yu,Luyan Xiong,Zhixuan Zeng,Zeyu Pan,Gnanasekar Sathishkumar,Jing Li,Jin Ye,En-Tang Kang,Liqun Xu,Xi Rao
The escalating levels of indoor bacterial contamination and air pollution considerably threaten public health. In this work, we synthesized a three-dimensional flower-like TiO 2 /g-C 3 N 4 nano-powder with a Z-scheme heterojunction structure, which demonstrated superior photocatalytic performance and efficient free radical generation capability, enabling effective mitigation of bacterial pathogens and indoor volatile organic compounds under low-power light irradiation. The material achieved 100% degradation of formaldehyde within 40 minutes under 420 nm LED irradiation. Antibacterial tests showed a 100% inactivation rate for S. aureus within 60 minutes and complete elimination of E. coli within 40 minutes. Characterizations and DFT calculations had confirmed the establishment of the Z-scheme heterojunction, which significantly decreased the band gap and improves the absorption of visible light. Concurrently, the efficient separation of charge carriers and the transfer of electrons facilitated the production of reactive oxygen species. In conclusion, this research presents a novel and environmentally sustainable approach to developing high-performance photocatalysts for applications in indoor environment improvement.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Shengjie Xia,Guanhua Zhang,Zhiyan Gao,Yue Meng,Bo Xie,Hanfeng Lu,Zheming Ni
In this paper, the novel 3D hollow Z-scheme heterojunction photocatalysts based on Bi 2 O 3 and CoAl layered double hydroxides (Bi 2 O 3 @CoAl-LDHs) were prepared for efficient visible-light-driven photocatalytic ammonia synthesis . The synthesized nanohybrid exhibits excellent photocatalytic ammonia synthesis performance (48.7 μmol·L −1 ·h −1 ) and structural stability , which is primarily attributed to the fact that Z-scheme heterojunction significantly enhanced lifetime of photogenerated carriers (6.22 ns) and transfer efficiency of surface photogenerated electrons (72.5%). Strict control experiments and nitrogen isotope labeling results show that nitrogen and hydrogen in the produced ammonia come from nitrogen and water in the reactant respectively. Electron paramagnetic resonance (EPR) experiments and density functional theory (DFT) calculations further reveal that the built-in electric field due to the difference between Bi 2 O 3 and CoAl-LDHs is the key to constructing the Z-scheme heterojunction. In addition, results of partial density of states (PDOS) show that Co in Bi 2 O 3 @CoAl-LDHs composite is the active site for photocatalytic N 2 fixation.
研究领域:
材料科学
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光催化
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纳米技术
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能源化学
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环境科学
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无机化学
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APPLIED SURFACE SCIENCE
·
2023
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IF 6.7
Jie Zhang,Jiasheng Li,Quanxi Zhang,Donggang Guo
Constructing a Z-scheme photocatalytic system offers great advantages for boosting photocatalytic performance due to its effective charge carrier transfer and strong redox capability. Herein, Cu 2 S/CuS nanosheets heterojunction were prepared by a facile one-pot solvothermal method. CuS/Cu 2 S Z-scheme heterojunction realized rapid bacteria-killing under near-infrared (NIR) irradiation. The optimized CuS/Cu 2 S (CuS/Cu 2 S-1) achieved 99 % antibacterial efficiency against Escherichia coli ( E. coli ) within 10 min NIR irradiation. Owing to the optimization of CuS/Cu 2 S-1 Z-scheme heterojunction, the efficient interfacial charge separation was realized, thereby resulting in a high yield of reactive oxygen species. Moreover, the heterojunction exhibited locally a higher temperature under NIR irradiation, favorable for eradicating bacteria. In addition, radical scavenging tests and ESR spectra results showed that ⋅O 2 – , ⋅OH and 1 O 2 were main active species responsible for sterilization. Under the synergy of photocatalytic and photothermal effects, the membrane structure of bacteria was severely damaged in CuS/Cu 2 S-1 system. This study not only offers a reliable approach for photothermocatalytic inactivation, but also affords the bases for the development of Z-scheme heterojunction aimed at designing highly efficient photocatalysts.
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Asian Journal of Pharmaceutical Sciences
·
2023
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IF 10.2
Jie Lv,Xiaoyu Wang,Xue Zhang,Runpei Xu,Shuyang Hu,Shuangling Wang,Meng Li
Tumor microenvironment (TME) with the particular features of severe hypoxia, insufficient endogenous H 2 O 2 , and overexpression of glutathione (GSH) markedly reduced the antitumor efficacy of monotherapy. Herein, a TME-responsive multifunctional nanoplatform (Bi 2 S 3 @ [email protected] /Art NRs) was presented for synergistic photothermal therapy (PTT), chemodynamic therapy (CDT), and photodynamic therapy (PDT) to achieve better therapeutic outcomes. The Z-scheme heterostructured bismuth [email protected] nanorods (Bi 2 S 3 @Bi NRs) guaranteed excellent photothermal performance of the nanoplatform. Moreover, its ability to produce O 2 and reactive oxygen species (ROS) synchronously could relieve tumor hypoxia and improve PDT outcomes. The densely coated polydopamine/ammonium bicarbonate (PDA/ABC) and hyaluronic acid (HA) layers on the surface of the nanoplatform enhanced the cancer-targeting capacity and induced the acidic TME-triggered in situ “bomb-like” release of Art. The CDT treatment was achieved by activating the released Art through intracellular Fe 2+ ions in an H 2 O 2 -independent manner. Furthermore, decreasing the glutathione peroxidase 4 (GPX4) levels by Art could also increase the PDT efficiency of Bi 2 S 3 @Bi NRs. Owing to the synergistic effect, this nanoplatform displayed improved antitumor efficacy with minimal toxicity both in vitro and in vivo . Our design sheds light on the application of phototherapy combined with the traditional Chinese medicine monomer-artesunate in treating the hypoxic tumor.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Feiran Jia,Qing Liu,Liyan Xie,Zhishan Luo,Jianhui Huang,Yingying He,Lirong Qiu
The use of heterojunctions with Z-scheme photocatalysts holds great promise for enhancing the photocatalytic degradation efficiency of antibiotics. In this study, we report the construction of a novel heterostructure by in-situ growth of the ultrathin polymeric carbon nitride (PCN) on the electrospun Bi 2 WO 6 nanofibers for improved photocatalytic tetracycline (TC) degradation under visible light. Our gas–solid reaction strategy enables the formation of uniform and intimate junctions between the PCN nanosheets and the Bi 2 WO 6 nanofibers, resulting in a well-contacted interface that remarkably accelerates the separation and transfer of the photogenerated charge carriers. The optimized PCN/Bi 2 WO 6 photocatalyst exhibits a significant TC degradation rate of 89.5 % under visible light, which is 1.4-fold and 2.0-fold of the pure PCN and Bi 2 WO 6 photocatalysts, respectively. Our innovative design philosophy opens up a new horizon for the development of efficient Z-scheme heterostructured photocatalysts for antibiotic degradation.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Xiaoqing Wang,Jing Zhang,Rui Wang,Yujie Ren,Shiyao Jin,Shimin Wang,Hongjing Lu,Yongjiang Wang,Junzi Zhao,Chunhua Xiong
We present a strategy for the modification of an ion-exchange resin (D113) as an inexpensive carbon source to obtain a macrospherical photocatalyst precursor that can be transformed into a stable all-solid-state Z-scheme heterojunction catalyst (denoted Bi 2 O 3 -Co 3 O 4 @C). X-ray diffractometry and Fourier transform infrared and Raman spectroscopy measurements confirmed the presence of highly graphitized carbon in the complex. Significantly, the cost of the as-prepared material was only 1/200 of that of commercial carbon nanotubes and 1/80 of that of graphene oxide . Aided by the organic carbon source, Bi 2 O 3 -Co 3 O 4 @C showed an enhanced light absorption, hindered electron–hole recombination, and an enhanced photocurrent response. Under simulated solar irradiation, Bi 2 O 3 -Co 3 O 4 @C (20 mg/L) showed degradation efficiencies of 100%, 47.52%, 94.28%, and 100% for methylene blue, rhodamine B, tetracycline, and Cr(VI), respectively, after 120 min. Herein, the highest turnover frequency (TOF) obtained under irradiation was 2.5 h −1 for Cr(VI). Further, the degradation efficiency for methylene blue trihydrate remained 91.46% after five cycles, indicating significantly higher stability than that of a catalyst prepared without graphitic carbon. The optimized band structure and photocatalytic mechanism of Bi 2 O 3 -Co 3 O 4 @C were determined based on ultraviolet-visible measurements and plane-wave density functional theory calculations in VASP. The findings of this study indicate the promise of the Bi 2 O 3 -Co 3 O 4 @C macrospheres for industrial applications based on their photocatalytic performance, high stability, low cost, and suitable particle size.
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Environmental Science and Ecotechnology
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2023
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IF 12.6
Jing-Yan Zhang,Jie Ding,Lu-Ming Liu,Rui Wu,Lan Ding,Jun-Qiu Jiang,Ji-Wei Pang,Yan Li,Nan-Qi Ren,Shan-Shan Yang
Sulfamethoxazole (SMX) is a significant environmental concern due to its adverse effects and ecological risks. SMX elimination in aquatic environments via photocatalysis presents a viable solution, given its high oxidation potential. However, such a solution remains controversial, primarily due to a lack of selectivity. Here we introduce a molecularly imprinted TiO 2 @Fe 2 O 3 @g-C 3 N 4 (MFTC) photocatalyst designed for the selective degradation of SMX. To assess MFTC's selectivity, we applied it to degrade synthetic wastewater containing SMX alongside interfering species sulfadiazine (SDZ), ibuprofen (IBU), and bisphenol A (BPA). The results demonstrated a selective degradation efficiency rate of 96.8%, nearly twice that of competing pollutants. The molecularly imprinted sites within the catalyst played a crucial role by selectively capturing SMX and enhancing its adsorption, thereby improving catalytic efficiency. The degradation process involved •OH and •O 2 − free radicals, with a newly proposed double Z-scheme mechanism and potential pathway for SMX degradation by the MFTC photocatalytic system. This study enriches the application of photocatalysis using molecularly imprinted nanocomposite materials for treating complex pollutant mixtures in water.
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JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Bowen Dong,Yuqi Wan,Dan You,Qingrong Cheng,Zhiquan Pan
In order to alleviate the problem of water resource pollution, the exploration of visible-light driven excellent photocatalysts is an important issue for worldwide sustainable green energy systems. In this work, a novel binary hybrid nanocomposite WO 3 /Mn-ZIF-67 heterojunction photocatalyst was prepared through simple template method. It was based on the particular structure and performance of metal-organic framework (MOFs), and the structure of the heterojunction photocatalyst was expressed by SEM, TEM , FT-IR, DRS , XPS , PXRD and EIS . The novel WO 3 /Mn-ZIF-67 heterostructure showed more efficient photocatalytic properties for Tetracycline (TC) decomposition and hydrogen production than that of WO 3 monomer and Mn-ZIF-67 monomer under simulated light, respectively. Owing to the active radical catch and ESR experiments, a rational solid-state Z-model electron migration theory was rendered. Z-model mechanism can neatly be obligated to the raised degradative capacity of the photocatalytic reaction. The wonderful high-efficiency photocatalytic decomposability of heterojunction was mainly due to: (i) the WO 3 structure improved dramatically the light absorption efficiency of the photocatalyst. (ii) the doped Mn enhanced the photoelectric properties of ZIF-67. (iii) contact with the close interface between WO 3 and Mn-ZIF-67 produced efficient charge separation and migration.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Ning Shao,Juan Li,Shenglei Che,Jingwu Zheng,Liang Qiao,Yao Ying,Jing Yu,Wangchang Li
The L -band and S-band electromagnetic waves are widely utilized in radar and satellite communications. This paper reports the successful synthesis of 85.8% content Ba 3 Co 2 Fe 24 O 41 (Co 2 Z) at a relatively low temperature of 1150 °C using the solid-phase method with BaFe 12 O 19 (BaM) and Ba 2 Co 2 Fe 12 O 22 (Co 2 Y) as precursors. The Co 2 Z samples were confirmed to have been successfully synthesized using X-ray diffraction (XRD) and thermogravimetry/differential scanning calorimetry (TG-DSC) spectra. Scanning electron microscopy (SEM) images revealed that the sintered samples exhibited large grains (>10 µm). Vibrating-sample magnetometry (VSM) data indicated that the synthesized Co 2 Z samples possessed distinct soft magnetic properties . X-ray photoelectron spectroscopy (XPS) results showed that the Fe 3+ content decreased with the increase in synthesis temperature. The samples synthesized at 1110 °C − 1280 °C had a permeability of 10–20, a cut-off frequency of approximately 1 GHz, and a dielectric constant of 10–30. When the thickness of the sample synthesized at 1150 °C was 3.9 mm, the frequency range of the reflection loss (RL)< −10 dB was 2.55 GHz (0.98–3.53 GHz), with 1.77 GHz as the center frequency, and RLmin was − 57.8 dB. This observation indicates that the effective absorption bandwidth of the samples covers the entire L and S bands, which significantly satisfies practical applications within the military and civilian sectors.
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LANGMUIR
·
2023
·
IF 3.9
Wei Yang,Yanhua Gao,Mingli Cao
The enhanced photocatalytic properties of Z-Scheme Bi@BiOCl/C3N4-DPY heterojunction materials were successfully prepared by the ultrasonic-assisted coprecipitation method. The Bi@BiOCl/C3N4-DPY heterojunction exhibited remarkable photocatalytic activity under visible light irradiation, and the degradation rate of methyl orange (MO) was about 90.6% in 180 min. This impressive efficiency is mainly due to the Z-Scheme charge transfer mechanism in Bi@BiOCl/C3N4-DPY, resulting in the efficient separation of charge carriers and an increase in the REDOX potential of photogenerated electrons and holes. C3N4 was modified with a π-deficient conjugated pyridine ring, which caused the light absorption redshift, promoted the formation of oxidizing •O2–, and improved the photocatalytic activity. At the same time, a well-aligned heterojunction is formed at the interface between C3N4-DPY and BiOCl, facilitating the seamless transfer of light-induced electrons from the LUMO of C3N4-DPY to the CB of BiOCl. In addition, the addition of Bi introduces a unique band gap reduction effect, resulting in a change in the density of the band states, which further promotes charge transfer and separation. It is worth noting that the introduction of metallic bismuth (Bi) brings about a unique band gap reduction effect, resulting in a change in the density of states within the band, which ultimately promotes charge transfer and separation. The Z-scheme charge migration inside Bi@BiOCl/C3N4-DPY further promotes the efficient separation of photogenerated electron–hole pairs, greatly improving the overall efficiency of the material. The Z-structured photocatalyst developed in this study has great application potential in various fields of photocatalysis.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 47
·2208962
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IF 19.924
Chao Cui,Xiaolei Zhao,Xiaowen Su,Ning Xi,Xiaoning Wang,Xiaowen Yu,Xiao Li Zhang,Hong Liu,Yuanhua Sang
The construction of a Z-scheme photocatalytic system is significant in realizing efficient water splitting for hydrogen (H 2 ) evolution. Herein, a novel donor–acceptor covalent organic polymer (COP) is introduced to construct a COP-ZnIn 2 S 4 (ZIS) heterostructure via in situ condensation reaction. The COP-ZIS heterostructure with platinum (Pt) as cocatalyst delivers a high hydrogen evolution rate of 5.04 mmol g −1 h −1 , which is 16 and 3 times higher than ZIS and Pt/ZIS, respectively. The built-in field between the highest occupied molecular orbital of COP and the valence band (VB) of ZIS forms a Z-scheme heterostructure, realizing efficient charge separation. Based on density functional theory calculations, the porphyrin molecule in COP act as electron donor that provides compensating electrons to ZIS. The cocatalyst boosts the utilization of electrons in ZIS. The rate-limiting steps for H 2 evolution with ZIS are overcome by improving charge separation with the Z-scheme heterostructure and speeding up the reaction with cocatalyst. Therefore, the COP-ZIS heterostructure with Pt exhibits optimized H 2 evolution. This study will inspire to construct novel organic and inorganic Z-scheme photocatalysts for efficient green energy production.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Hong Yao,Gang Jin,Guozhe Sui,Jinlong Li,Dongxuan Guo,Shuang Liang,Ze Luo,Rongping Xu,Chao Wang,Jing Tang
Z-scheme photocatalytic heterojunction is considered as an effective strategy to promote the photogenerated electron-hole separation for improving the efficiency of photocatalytic hydrogen precipitation from splitting water significantly. Herein, a novel Z-scheme 2D-ZnIn 2 S 4 /NiCoP heterojunction is successfully prepared by coupling NiCoP derived from ZIF-67 through phosphating treatment with 2D-ZnIn 2 S 4 lamellae via a facile hydrothermal method . The Z-scheme heterostructure of ZnIn 2 S 4 /NiCoP could suppress the recombination-rate of photogenerated electron-hole pairs and enhance the visible-light-driven photocatalytic hydrogen production . As a result, the hydrogen production rate of 2D-ZnIn 2 S 4 /NiCoP (10 wt% ZnIn 2 S 4 ) increase to 5098.12 μmol g −1 h −1 significantly with an apparent quantum yield (AQY) of 5.24% at 420 nm, which is 3.07 times than that of bare ZnIn 2 S 4 . The enhancement of photocatalytic performance is attributed to the following issues: 2D-ZnIn 2 S 4 could avoid the agglomeration of tiny ZnIn 2 S 4 , exposing more active sites and shortening the transmission distance of photogenerated carries; the formation of Z-scheme heterostructure could promote the separation of photogenerated electron-hole pairs; the unique hollow structure of NiCoP derived from ZIF-67 could inhibit the recombination of the photogenerated electron-hole. Overall, this work could provide a new idea for designing and preparing of visible-light-driven photocatalysts with high efficiency for photocatalytic hydrogen production.
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