CHEMISTRY-A EUROPEAN JOURNAL
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2022
·Vol. 28
·期 68
·e202202004
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IF 5.02
Conghui Zhao,Liwei Sun,Yang Xu,Beibei Dong,Yuhong Luo,Jingde Li,Jianxin Chen,Zisheng Zhang
Graphical Iodine-doped Bi 2 GdO 4 Cl with a significantly promoted visible-light-responsive O 2 -evolving performance of 154.8 μmol ⋅ h −1 and an apparent quantum efficiency of ∼1.1 % at 420 nm is reported. The incorporation of I − ions causes the extended light absorption and promoted charge separation. Visible-light-responsive bismuth-based oxyhalide has recently attracted extensive attention, however, the promotion of its charge separation is still challenging. Herein, we introduce iodine into Bi 2 GdO 4 Cl to synthetize I-doped Bi 2 GdO 4 Cl (denoted as yI−Bi 2 GdO 4 Cl, 0≤y≤2). The incorporation of I − ions is found to enhance light absorption and to accelerate charge separation by combining various characterizations such as density functional theory calculation, photoelectrochemical test, electrochemical impedance spectroscopy, photoluminescence spectrum, and open-circuit voltage decay. The O 2 -evolving performances of 1I−Bi 2 GdO 4 Cl with optimized dopant concentration of I − ion and IrO 2 loaded 1I−Bi 2 GdO 4 Cl are tremendously enhanced by ca. 4 and 45 times compared to pristine Bi 2 GdO 4 Cl. Notably, The O 2 evolution rate reaches as high as 154.8 μmol ⋅ h −1 with an apparent quantum efficiency of ∼1.1 % at 420 nm. The synthetic iodine-doped photocatalyst remains stable after long-term photoreaction, demonstrating its potential in the field of photocatalysis.
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Journal of Cleaner Production
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2022
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IF 11.072
Hua Chai,Chunyan Yang,Peng Xu,Peng Wang,Jianhua Qu,Guangshan Zhang
Heterojunction photocatalysts Fe 2 O 3 –ZnO@C/g-C 3 N 4 (FZCCN) were prepared by precipitation and calcination in this study. Systematic characterization demonstrated that the tight interfacial contact was established between Fe 2 O 3 –ZnO@C and g-C 3 N 4 , and the FZCCN-4 (theoretical mass ratios of ZnO and g-C 3 N 4 was 4) had large BET surface area (110.136 m 2 g −1 ). Bisphenol A (BPA) was selected to estimate the photocatalytic properties of FZCCN and the degradation reaction kinetics was analyzed at the same time. The results showed that, FZCCN-4 had the highest removal rate of BPA (100%, 60 min). The degradation rate of BPA by using FZCCN-4 was approximately 32 and 130 times higher than that of g-C 3 N 4 and Fe 2 O 3 –ZnO@C, respectively. ·O 2 − was proved to be the main active species by capture experiment and electron spin resonance. The UV–vis and PL results proved the formation of heterojunction in FZCCN. This study also identified the intermediates of BPA degradation and tested their toxicity. The excellent visible light catalytic performance of Fe 2 O 3 –ZnO@C/g-C 3 N 4 makes it an ideal material for degrading contaminants.
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Nano-Micro Letters
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2022
·Vol. 14
·期 1
·1-14
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IF 23.655
Han Xiao,Ji Yun,Wu Li,Xia Yanlong,Bowen Chris R.,Yang Ya
Coupled nanogenerators have been a research hotspot due to their ability to harvest a variety of forms of energy such as light, mechanical and thermal energy and achieve a stable direct current output. Ferroelectric films are frequently investigated for photovoltaic applications due to their unique photovoltaic properties and bandgap-independent photovoltage, while the flexoelectric effect is an electromechanical property commonly found in solid dielectrics. Here, we effectively construct a new form of coupled nanogenerator based on a flexible BiFeO 3 ferroelectric film that combines both flexoelectric and photovoltaic effects to successfully harvest both light and vibration energies. This device converts an alternating current into a direct current and achieves a 6.2% charge enhancement and a 19.3% energy enhancement to achieve a multi-dimensional "1 + 1 > 2" coupling enhancement in terms of current, charge and energy. This work proposes a new approach to the coupling of multiple energy harvesting mechanisms in ferroelectric nanogenerators and provides a new strategy to enhance the transduction efficiency of flexible functional devices.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2022
·
IF 3.428
Zihao Hu,Huiqi Wu,Fang Zhu,Sridhar Komarneni,Jianfeng Ma
MIL-101(Fe)/Co 3 O 4 composites were synthesized using a facile solvothermal method to establish the superiority of a heterogeneous photochemical catalysis system in the presence of Na 2 S 2 O 8 with visible light irradiation. In the present system, the MIL-101(Fe)/Co 3 O 4 catalyst showed better catalytic performance than the single photocatalytic or chemical catalytic system, implying that the MIL-101(Fe)/Co 3 O 4 catalyst can combine both photocatalysis and chemical catalysis well. When tetracycline (TC) is the target pollutant, the highest degradation efficiency can be achieved within 40 min, reaching to 86 %. Crystallinity, morphology, and elemental valence of the MIL-101(Fe)/Co 3 O 4 composite were explored by using X-ray diffraction (XRD), scanning electron microscopy (SEM) as well as X-ray photoelectron spectroscopy (XPS). From the quenching experiments, it was found that 1 O 2 , SO 4 ‾, OH, and O 2 ‾ make contributions to the effective removal of tetracycline. Apart from that, the recovery and reuse characteristics of MIL-101(Fe)/Co 3 O 4 may facilitate the sustainable wastewater treatment.
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ENVIRONMENTAL POLLUTION
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2022
·
IF 9.988
Xiaoqian Zhang,Zhipeng Wu,Yixiao Wu,Abdulmoseen Segun Giwa,Shaobin Huang,Lishan Niu
Environmental dissemination caused by widespread use of antibiotics has been regarded as a possible hazard to aquatic ecosystem and human health. The increasing misgivings make it imperative to develop a novel catalyst with remarkable visible-light-driven activity to remove antibiotics, especially for their simultaneous decontamination . Herein, C/BiOCl composites were successfully prepared by decorating BiOCl nanosheets on food wastes biochar (C) by a simple hydrolysis strategy. Not only the binary system of tetracycline antibiotics, but also the ternary mixture could be simultaneously photodegraded over 25% C/BiOCl within 15 min irradiation. The improved photocatalytic activities could be ascribed to the introduction of biochar, endowing increased surface area, enhanced separation of photo-generated charge carriers, and better light absorption . The as-prepared 25% C/BiOCl also demonstrated satisfactory stability and positive removal effect in actual water samples. The present work provides new insights into the development of biochar-based photocatalysts for simultaneous degradation of multiple antibiotics.
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FUEL
·
2022
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IF 8.035
Qing Liu,Ting Su,Haowei Zhang,Weiping Liao,Wanzhong Ren,Zhiguo Zhu,Kaixuan Yang,Christophe Len,Jia Yu,Deyang Zhao,Hongying Lü
Photocatalytic oxidative desulfurization (PODS) is a novel emerged promising method for effectively removing sulfur compounds under milder operating conditions. Herein, Anderson type polyoxometalate (NH 4 ) 4 ZnH 6 Mo 6 O 24 modified TiO 2 nanomaterial (named Zn-Mo/TiO 2 ) was designed to oxidize DBT to DBTO 2 under visible light irradiation with H 2 O 2 , this catalyst was synthesized based on Anderson type polyoxometalate (NH 4 ) 4 ZnH 6 Mo 6 O 24 by a sol-hydrothermal method. Different experimental effects of Anderson type polyoxometalate modified TiO 2 on the desulfurization conversion rate were investigated, including different (NH 4 ) 4 ZnH 6 Mo 6 O 24 contents, various catalyst dosage, additional sulfur-containing substrates and different oxygen sulfur ratios. 100 % sulfur removal can be achieved with (NH 4 ) 4 ZnH 6 Mo 6 O 24 /TiO 2 catalyst in only 30 min under room temperature. The considerable enhancement of photocatalytic activity is associated with a synergistic effect between the multi-metal structure of polyoxometalate and TiO 2 , which are conducive to promoting the transfer and separation of photogenerated electrons and holes.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
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IF 6.76
Xiaolei Zhang,Ziying Wang,Yangsai Lyu,Jia Li,Kun Song,Ningning Xing,Dickon H.L. Ng
Near-infrared (NIR) light-powered nanomotors with active motion have attracted extensive attention in the chemo-photothermal therapy of cancer. However, there are also some limitations such as complicated synthesis process, low permeability of drugs and viscous physiological environment. Herein, we developed a facile route to synthesize novel NIR light-powered DOX/Au-m-HTAS nanomotor based on natural halloysite (HNTs) for active chemo-photothermal therapy. Such nanomotor exhibited NIR light controlled on/off motion with a maximum speed of 64.5 μm/s. Owing to the synergetic NIR light-powered motion and chemo-photothermal therapy, DOX/Au-m-HTAS nanomotor could effectively adhere tumor cells, leading to deeper cell penetration, higher cellular uptake, and better ablation of tumor cells. Meanwhile, DOX/Au-m-HTAS nanomotors also had enhanced ability for CT imaging of local tumor, demonstrating the enhanced anticancer efficiency. This strategy provided a new insight into the chemo-photothermal synergistic therapy of tumors.
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Advanced Optical Materials
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2022
·Vol. 11
·期 1
·2201778
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IF 10.05
Qiangqiang Wang,Shuo Ding,Siliang He,Ting Zhang,Lei Qian,Peng Xiao,Tao Chen,Chaoyu Xiang
Although organic metal halide perovskite light-emitting diodes (PeLEDs) have been developed rapidly in recent years, their commercialization and further applications are still hindered by ion migration-induced inferior operational stability. Although the formation of a quasi-2D structure is a well-known solution that can efficiently suppress ion migration, the operation lifetime improvement is still limited. In this study, long-chain phenylbutanammonium is used to replace the commonly used phenethylammonium as the L-site cations. With large steric hindrance, ion migration inside the PeLEDs is effectively suppressed. Consequently, the PeLED with near-infrared emission at 763 nm exhibited an operational lifetime ( T 90 ) of up to 5.3 h, which is 53-fold higher than that of the control device. This study demonstrates the feasibility of significant stability improvement using a simple cation engineering strategy for PeLEDs.
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ADVANCED MATERIALS
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2022
·Vol. 35
·期 3
·2208078
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IF 32.086
Shaocheng Liu,Zhenyu Guo,Xianxin Wu,Xinfeng Liu,Zijian Huang,Liang Li,Jinwen Zhang,Huanping Zhou,Ling-Dong Sun,Chun-Hua Yan
While quasi-two-dimensional (quasi-2D) perovskites have emerged as promising semiconductors for light-emitting diodes (LEDs), the broad-width distribution of quantum wells hinders their efficient energy transfer and electroluminescence performance in blue emission. In particular, the underlying mechanism is closely related to the crystallization kinetics and has yet to be understood. Here for the first time, the influence of bifunctional zwitterions with different coordination affinity on the crystallization kinetics of quasi-2D perovskites is systematically investigated. The zwitterions can coordinate with Pb 2+ and also act as co-spacer organic species in quasi-2D perovskites, which collectively inhibit the aggregation of colloidal precursors and shorten the distance of quantum wells. Consequently, restricted nucleation of high- n phases and promoted growth of low- n phases are achieved with moderately coordinated zwitterions, leading to the final film with a more concentrated n distribution and improved energy transfer efficiency. It thus enables high-efficiency blue LEDs with a recorded external quantum efficiency of 15.6% at 490 nm, and the operation stability has also been prolonged to 55.3 min. These results provide useful directions for tuning the crystallization kinetics of quasi-2D perovskites, which is expected to lead to high-performance perovskite LEDs.
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JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Suzhou Xu,Can Liu,Xuping Jiang,Xinyu Wang,Shijin Zhang,Yanting Zhang,Qingguo Wang,Weiling Xiong,Jing Zhang
The performance and mechanisms of a titanium carbide (Ti 3 C 2 ) MXene modified Fe 3+ /hydrogen peroxide (H 2 O 2 ) system were compared in detail under dark and visible light conditions, with a new mechanism proposed for the reaction and reduction of MXene by Fe 3+ . Using Bisphenol A (BPA) as the target pollutant, the degradation of BPA by the Fe 3+ /H 2 O 2 system was improved after adding MXene in the dark, and the degradation rate of BPA was ≥ 95 % within 12.5 min under visible light, six times higher than that in the dark. Fe 2+ was ascertained to be the effective component responsible for H 2 O 2 activation to produce ·OH. SEM , XPS, ICP, XRD, and FTIR spectroscopy , analyses show that MXene and Fe 3+ form a complex, and then MXene reacts with Fe 3+ by breaking the Ti–C bonding to accelerate the Fe 3+ /Fe 2+ cycle. MXene uses photogenerated electrons to promote this reaction under visible light. In addition, quenching experiments and electron spin resonance spectroscopy results show that ·OH and O 2 •− are the main reactive oxygen species under visible light, while ·OH is the main active species in the dark. MXene thus effectively uses O 2 to form O 2 •− under visible light and promotes the Fe 3+ /Fe 2+ cycle. This study provides a theoretical basis for the combination of visible light catalysis and the advanced oxidation process of a Ti 3 C 2 MXene.
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JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Qingping Xin,Xinghui Zhang,Wei Shao,Hong Li,Yuzhong Zhang
The purification of sulfur dioxide (SO 2 ) from the flue gas is an urgent problem given its toxicity to humans and organisms and attendant environmental concerns. In this study, aiming at the separation of SO 2 , mixed matrix membranes (MMMs) are fabricated by incorporating covalent organic framework (COF) into Pebax 1657 polymer matrix . By strengthening the solubility-diffusion mechanism of SO 2 gas molecules, SO 2 /N 2 gas separation performance is investigated. Firstly, MMMs are fabricated by incorporating a porous framework material (TpPa-1) containing SO 2 affinity groups into the Pebax 1657 matrix as a filler. Then the azo group (Azo) is introduced into the MMMs by the method of physical blending. The MMMs with light-responsive characteristic are fabricated by introducing TpPa-1 blended with pAAB into the Pebax 1657 polymer matrix. Secondly, the SO 2 /N 2 separation performance of Pebax/TpPa-1 MMMs is improved with the increasing of filler loading. Specially, the Pebax/TpPa-1 membrane with 5 wt% exhibits the most excellent SO 2 /N 2 separation performance with SO 2 permeability of 1709 Barrer and SO 2 /N 2 selectivity of 811. The MMMs overcome the trade-off effect and achieve enhancement of SO 2 permeability and SO 2 /N 2 selectivity simultaneously. Thirdly, both the SO 2 permeabilities and SO 2 /N 2 selectivities of Pebax/pAAB@TpPa-1-5% membrane exhibit regular and reversible changes under UV–Vis light-conversion conditions, indicating that MMMs containing Azo possesses dynamic light-responsive properties. Furthermore, TpPa-1 and pAAB repel each other in the membrane because both have negative charges, resulting in the forced surface segregation of COF in the Pebax/pAAB@TpPa-1 MMMs.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Baowei Cao,Dachuan He,Fei Rao,Qadeer Ul Hassan,Xiaolong Cai,Lingna Liu,Fan Xue,Gangqiang Zhu
BiOI-loaded flower-like CeO 2 (BiOI/CeO 2 ) p-n heterojunction was synthesized via a simple two-step chemical route. The phase structure and chemical states of the heterojunction were analyzed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. The transmission electron microscopic (TEM) and the scanning electron microscope (SEM) reveal the close contact between BiOI and CeO 2 . The formation of the p-n heterojunction is verified by the Mott-Schottky curves. The p-type BiOI with a narrow band-gap when loaded on CeO 2 can not only improve the separation of photogenerated electron-hole pairs but also facilitate the absorption of visible light. The photo-oxidative removal efficiency of 9%BiOI/CeO 2 among other heterojunctions for NO reaches 45.49% and remains highly stable with an efficiency of 40.40% after the five cycles. Trapping experiments and ESR measurements were conducted to explore the contribution of charge carriers and the reactive oxygen species during the photocatalytic NO removal. This work highlights that constructing such p-n heterojunction by loading BiOI on CeO 2 microstructures can significantly enhance photocatalytic NO removal.
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