NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Zhenglong Zhou,Dinghan Liu,Bing Yang,Jigang Wu,Rui Li
Cadmium indium sulfide (CdIn2S4), a widely used n-type semiconductor, has been considered a promising photoanode material for photoelectrochemical (PEC) water splitting due to its excellent light response characteristics and suitable energy levels. However, its application in the PEC field is limited by rapid carrier recombination on the surface and severe photocorrosion phenomena. In this study, a novel strategy is proposed by loading Cu2S onto the surface of CdIn2S4 via an ultrasound-assisted method to modify the CdIn2S4 photoanode. As a p-type semiconductor, Cu2S forms a p–n heterojunction with CdIn2S4, creating an internal electric field that facilitates charge transport. Additionally, the Cu2S overlayer acts as a cocatalyst, enhancing the surface reaction kinetics and improving the charge injection efficiency at the photoelectrode/electrolyte interface. The incorporation of Cu2S also reduces the photocorrosion on the CdIn2S4 surface. Experimental results demonstrate that the optimal Cu2S/CdIn2S4 photoanode exhibits a photocurrent of up to 0.3 mA cm−2 at 1.23 V versus the reversible hydrogen electrode, approximately ten times higher than that of bare CdIn2S4. This work offers an effective approach to modulate carrier dynamics, thereby enhancing the PEC performance of photoanodes.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Jiuli Chang,Shiqi Zang,Wenfang Liang,Dapeng Wu,Zhaoxun Lian,Fang Xu,Kai Jiang,Zhiyong Gao
The intrinsic faradic reactivity is the uppermost factor determining the charge storage capability of battery material, the construction of p-n junction composing of different faradic components is a rational tactics to enhance the faradic activity. Herein, a reduced graphene oxide@cobalt nickle sulfide@nickle cobalt layered double hydroxide composite (rGO@CoNi 2 S 4 @NiCo LDH) with p-n junction structure is designed by deposition of n -type nickle cobalt layered double hydroxide (NiCo LDH) around p-type reduced graphene oxide@cobalt nickle sulfide (rGO@CoNi 2 S 4 ), the charge redistribution across the p-n junction enables enhanced faradic activities of both components and further the overall charge storage capacity of the resultant rGO@CoNi 2 S 4 @NiCo LDH battery electrode. As expected, the rGO@CoNi 2 S 4 @NiCo LDH electrode can deliver high specific capacity ( C s , 1310 ± 26 C g −1 at 1 A g −1 ) and good cycleability (77% C s maintaining ratio undergoes 5000 charge-discharge cycles). Furthermore, the hybrid supercapacitor (HSC) based on the rGO@CoNi 2 S 4 @NiCo LDH p-n junction battery electrode exports high energy density ( E cell , 57.4 Wh kg −1 at 323 W kg −1 ) and good durability, showing the prospect of faradic p-n junction composite in battery typed energy storage.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Li Liu,Zhian Jing,Min Zhang,Xuanting Zhao,Yeqing Lan,Cheng Chen
Herein, waste heating pad, which mainly contains iron and vermiculite components after calcination in air, was used to support cobalt-yttrium bimetallic oxide for the first time. The magnetic material (IV@CoY) was applied for the activation of peroxymonosulfate (PMS) to simultaneously realize the removal of p -arsanilic acid ( p -ASA) and the secondary inorganic arsenic (As(V)). 50 µM p -ASA was completely degraded in the system of IV@CoY (0.2 g/L) and PMS (0.5 mM) within 7 min, and about 99 % of the produced As(V) was adsorbed within 150 min. Electrochemical experiments illustrated that IV@CoY possessed the superior conductivity as compared to CoY, which greatly boosted PMS activation. The pseudo-first-order rate constant ( k IV@CoY ) was high up to 0.873 min −1 , which was 7.6 times larger than k CoY (0.115 min −1 ). Catalytic mechanism analyses revealed that the produced SO 4 •− , • OH and 1 O 2 participated in the oxidation of p -ASA and As(III). The adsorption of the produced As(V) was achieved by ion exchange with −OH/CO 3 2− on the surface of IV@CoY. The degradation pathways of p -ASA were further proposed on the basis of the detection of its intermediate products. Initial pH exerted a significant effect on the degradation-adsorption reaction and weak acidic or neutral condition was beneficial to the removal of p -ASA and As(V). To evaluate the practical application potential of IV@CoY, the disposal of p -ASA and secondary As(V) were also carried out in real water samples. Furthermore, IV@CoY was consecutively used for 5 times, and almost 100% degradation of p -ASA and over 97% adsorption of inorganic arsenic were still achieved even in the fifth round, which prove its high stability and reusability. Our results fully demonstrate that the magnetic IV@CoY is a promising catalyst to activate PMS for eliminating organoarsenic from water.
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JOURNAL OF SUPERCRITICAL FLUIDS
·
2022
·
IF 4.514
Qianrui Xu,Pengcheng Gao,Yang Wang,Wenjie Jiang,Zhifei Wang,Yong Jiang,Zhen Jiao
Porous nanospheres have potential applications in reactions, catalysis and water treatment because of their high surface area, low density and high loading capacity. In this work, a reproducible and well-controlled way to fabricate hollow Polystyrene/Poly(divinylbenzene-co-methacrylic acid)@Fe 3 O 4 /Tannic acid@Ag (PS/P(DVB-co-MAA)@Fe 3 O 4 /TA@Ag) nanocomposites with high catalytic efficiency is developed. Firstly, hollow Polystyrene/Poly(divinylbenzene-co-methacrylic acid) (PS/P(DVB-co-MAA)) nanospheres with an open hole on the surface are produced by supercritical carbon dioxide (scCO 2 ) rapid depressurization methodology. The consequence shows that structure of polymer nanospheres is controllable by altering the reactive conditions, like temperature, pressure, solvent ratio, degree of cross-linking and time. Secondly, the magnetic Fe 3 O 4 and Ag nanoparticles are deposited onto the surface of hollow PS/P(DVB-co-MAA) nanospheres. The result indicates that hollow PS/P(DVB-co-MAA)@Fe 3 O 4 /TA@Ag nanocomposites are highly efficient in degrading dyes, displaying that the apparent rate coefficients of methylene blue (MB), rhodamine B (RhB) and 4-nitrophenol (4-NP) reduction are .0090 s −1 , 0.0239 s −1 , and 0.0073 s −1 , respectively. Besides, hollow PS/P(DVB-co-MAA)@Fe 3 O 4 /TA@Ag nanocomposites can be recycled at least seven times and show no significant loss in catalytic performance.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2020
·Vol. 22
·期 30
·17299-17305
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IF 3.43
Chenyang Zhou,Ya Chu,Linlin Ma,Yingqian Zhong,Chao Wang,Yalan Liu,Haoyue Zhang,Beibei Wang,Xia Feng,Xi Yu,Xiaotao Zhang,Yan Sun,Xiaozeng Li,Guangjiu Zhao
In this work, we introduced halogen-substituted chiral molecules as A-site cations to synthesize a series of novel organic–inorganic hybrid two-dimensional (2D) chiral perovskite materials (R-X-p-mBZA)2PbBr4 (X = H, F, Cl, Br; p: para-position; mBZA = α-methylbenzylamine) for the first time. This halogen-substituted cation strategy collectively solved problems of narrow emission, weak chirality and low photoluminescence quantum yield (PLQY) for the emerged chiral perovskites. Photoluminescence (PL) spectra are significantly broadened due to the additional emission from self-trapped excitons (STEs) besides free excitons (FEs) states modulated by introducing significant disorder to the Pb–Br–Pb angle. The chirality of A-site chiral molecules is transferred and amplified to entire perovskite materials by fixing the chiral molecules at A-site via the interaction of halogen atoms. Furthermore, their PLQYs are improved with the reduction of energy gap and inhibition of the non-radiative transition from STEs to ground state. The halogen-substituted A-site cation strategy can be performed to develop organic–inorganic hybrid chiral perovskites with various optoelectronic applications.
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ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Qing Zhou,Kaiyu Lin,Yongxin Liu,Guohan Sun,Shumei Wang,Haiyun Zhai
A novel nonenzymatic electrochemical sensor with high sensitivity for detecting organic phosphate (OPS) in medicinal herbs was fabricated based on a Mg-Al layered double hydroxide (Mg-Al LDH) nanocomposite glassy carbon electrode (GCE) modified with a poly-m-amino-benzenesulfonic acid (p-m-ABSA) film. Depositing Mg-Al LDH nanocomposites onto the surface of the p-m-ABSA composite resulted in an effective electrical response by increasing the electrode surface area and enhancing the electron transfer process, so the electrocatalytic activity was significantly enhanced. The research illustrated that the fabricated sensor (Mg-Al LDH/p-m-ABSA/GCE) exhibited strong affinity, high sensitivity, and selectivity towards methyl parathion (MP) and fenitrothion (FNT). Scanning electron microscopy (SEM) was used to characterize the surface morphology of the modified electrode and showed that the p-m-ABSA film and a few p-m-ABSA nanoparticles were coated on the surface. The surface area of the electrode was further enlarged by Mg-Al LDH owing to their layered nanostructure. Under optimal conditions, the anodic current had a linear relation equal to 0.1∼20.0 µM MP and 0.01∼50.0 µM FNT, with detection limits (S/ N = 3) of 33.0 nM MP and 3.5 nM FNT, respectively. Furthermore, Mg-Al LDH/p-m-ABSA/GCE was successfully used for the detection of MP and FNT in Astragalus and Magnolia medicinal herb samples.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Lulu Li,Bing Nan,Neng Neng Xu,Ge Bai,Ruinan He,Yuyu Liu,Jinli Qiao
Exploiting suitable photocathodes to achieve high photocurrent and long-term endurance is still a great challenge in photoelectrocatalytic CO 2 reduction (PEC CO 2 ) reactions. Herein, an In-doped Bi 2 O 3 decorated oxidized copper foam (CBIO/CF) self-standing photoelectric cathode is well designed by the self-assembly process without an externally added binder. Via sunlight-promoted strategy, CBIO/CF with a unique 3D hierarchical nanoflower structure displays a superior faradaic efficiency of 90.0 % towards HCOOH over a wide potential window from −0.87 ∼ −1.17 V RHE and reaches 97.8 % at −0.87 V RHE with a partial current density of 14.41 mA cm −2 . The in-situ Fourier transform infrared spectroscopy (FTIR) analysis demonstrates the abundant oxygen defects induced by In doping boost CBIO/CF absorbing substantive intermediate species related with formate generations, and porous structure accelerating mass transportation. Moreover, the well-designed staggered p-n heterojunctions of Cu 2 O and In-doped Bi 2 O 3 on the surface of catalysts favor the generation and separation of electron/hole pairs and contribute to the photocatalytic reduction of CO 2 under a bias voltage. This work paves the way for rational regulation of self-supporting photoelectrode for PEC CO 2 to HCOOH with suitable conduction band valence bands and high performance and stability.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Chenxi Ke,Yu Wu,Jiayao Ou,Hongda Zhu,Huiling Guo,Hongmei Sun,Mingxing Liu
Ochratoxin A (OTA) is a representative foodborne fungal toxin that poses great harm to humans, the ultra-sensitive detection of OTA is an urgent requirement for public health. In this work, a competitive colorimetric and ratio fluorescence dual-mode immunosensor for the detection of OTA based on 0D/2D AuAg NCs/SPCN/BGQDs heterojunction nanozyme was devised and fabricated. The presence of P-N heterojunctions was confirmed through electrochemistry and theoretical calculations, heterojunction formed between AuAg NCs-SPCN and BGQDs effectively augmented the oxidase-mimic activity, verified by enzyme kinetic analysis. Superoxide radicals (·O2-) were catalyzed by heterojunction nanozyme from dissolved oxygen, and o-phenylenediamine was oxidized by ·O2- to produce diaminophenazine. It exhibited an absorption peak at 450 nm overlapped with the emission peak of heterojunction nanozyme. The fluorescence at 434 nm was quenched through the IFE effect while the fluorescence at 565 nm was enhanced and accompanied by solution yellowing, so ratio fluorescence was formed due to two emission peaks and the dual-mode detection system was constructed. The dual-mode immunosensor exhibited exemplary linearity across the concentration span of 0.001–20 μg/L, with LODs of 0.28 ng/L (ratio fluorescence) and 0.2 ng/L (colorimetry) respectively. Therefore, this immunosensor demonstrated potential applications in food quality testing and visual analysis.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2018
·
IF 6.653
Chen Tian,Jian Zhao,Xinwen Ou,Jieting Wan,Yuepeng Cai,Zhang Lin,Zhi Dang,Baoshan Xing
p-Arsanilic acid (p-ASA) is an emerging organoarsenic pollutant comprising both inorganic and organic moieties. For the efficient removal of p-ASA, adsorbents with high adsorption affinity are urgently needed. Herein, amine-modified UiO-67 (UiO-67-NH2) metal–organic frameworks (MOFs) were synthesized, and their adsorption affinities toward p-ASA were 2 times higher than that of the pristine UiO-67. Extended X-ray absorption fine structure (EXAFS), X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) calculation results revealed adsorption through a combination of As–O–Zr coordination, hydrogen bonding, and π–π stacking, among which As–O–Zr coordination was the dominant force. Amine groups played a significant role in enhancing the adsorption affinity through strengthening the As–O–Zr coordination and π–π stacking, as well as forming new adsorption sites via hydrogen bonding. UiO-67-NH2s could remove p-ASA at low concentrations (<5 mg L–1) in simulated natural and wastewaters to an arsenic level lower than that of the drinking water standard of World Health Organization (WHO) and the surface water standard of China, respectively. This work provided an emerging and promising method to increase the adsorption affinity of MOFs toward pollutants containing both organic and inorganic moieties, via modifying functional groups based on the pollutant structure to achieve synergistic adsorption effect.
研究领域:
环境科学
·
材料化学
·
吸附技术
·
水污染控制
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理论化学
·
X射线光谱学
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ANALYST
·
2018
·Vol. 143
·期 19
·4764-4773
·
IF 3.864
Qi Xiao,Jinrong Feng,Jiawen Li,Mengmeng Feng,Shan Huang
Herein, a label-free and ultrasensitive electrochemical aptasensor for the determination of lead(II) (Pb2+) was described. It was based on the application of a N,P dual-doped carbon dot–chitosan (N,P-CD–CS) composite as the signal molecule carrier and an aptamer (APT) as the specific binding probe for Pb2+ that were self-assembled on the surface of a gold electrode (GE). 6-Mercapto-1-hexanol (MCH) was used to block the nonspecific binding sites, and the electro-active molecule thionine (THi) was used as the signaling probe. The differential pulse voltammetry (DPV) response of THi at a rather low working potential of −0.17 V (vs. Ag/AgCl) was used to detect Pb2+. The electrochemical performances of the resulting modified electrode were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. Under optimal experimental conditions, the modified electrode exhibited excellent DPV response depending on the concentration of Pb2+ in the 0.01 nM to 10 nM range. The limit of detection was 3.8 pM (at S/N = 3). The modified electrode displayed good reproducibility and excellent stability. It was successfully applied for the determination of Pb2+ in real water samples.
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DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Baadal Jushi Janani,Safaa Mohammed Ibrahim,Asad Syed,Morug Salih Mahdi,Abdallah M. Elgorban,Haider Radhi Saud,Manjula Subramaniam,Ling Shing Wong,Ramadan Fallah Amer
In this study, we have designed a nanocomposites based on MXene/g-C 3 N 4 (MX/CN) loaded on Fe 2 WO 6 /BiIO 4 (FWO/BIO) for different applications. The nanocomposites were identified by using the structural and morphological studies including XRD , FESEM, EDS , DLS , TGA , BET, UV–vis, XPS techniques. The average sizes of BIO, FWO/BIO, and MX/CN/FWO/BIO were 44, 46, and 58 nm, respectively. The synthesized MX/CN/FWO/BIO nanocomposites was utilized for the peroxidase colorimetric identification of uranyl ions (UO 2 2+ ) with the excellent selectivity and sensitivity properties (LOD: 3.21 nM). The antifungal efficiency of the as-fabricated nanomaterials was investigated and the inhibition zone at high concentration 2.5 mg/mL of MX/CN/FWO/BIO nanocomposites were 19.74, 17.91, 24.25, and 21.32 mm against Aspergillus spp., Penicillum spp., Candida spp. and Fusarium spp., respectively. The MX/CN/FWO/BIO nanocomposites was utilized in photocatalysis process for decomposition of p-chlorophenol under visible light lamp. The findings showed that the MX/CN/FWO/BIO nanocomposites can be degrade p-chlorophenol (100.0 %) under visible light irradiation (80 min). The photocatalytic response was decreased about 2 % after 5th cycle times, and showed the best stability of the MX/CN/FWO/BIO nanocomposites. The quenching test shows the mechanism of p-chlorophenol degradation was conducted by •O 2 − , and •OH species. Additionally, the ecological structure activity relationships ECOSAR software was utilized to evaluate the toxicity of the p-chlorophenol and the intermediates produced. This work can lead for manufacturing innovation in near future.
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CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Hong-Rui Zhu,Xi-Lun Wang,Juan-Juan Zhao,Meng-Han Yin,Hui-Min Xu,Gao-Ren Li
Plastics are ubiquitous in human life and pose certain hazards to the environment and human body. The increasing amount of CO 2 in the atmosphere will lead to the greenhouse effect. Therefore, it is urgent to treat microplastic waste and CO 2 by using environmentally friendly and efficient technologies. In this work, we developed an efficient photoelectrocatalytic system composed of Ni single atoms (Ni SAs) supported by P, N-doped amorphous NiFe 2 O 4 (Ni SAs/A-P-N-NFO) as anode and Ag nanoparticles (Ag NPs) supported by CuO/Cu 2 O nanocubes (Ag NPs@CuO/Cu 2 O NCs) as cathode for microplastic oxidation and CO 2 reduction. The Ni SAs/A-P-N-NFO was synthesized by calcination-H 2 reduction method, and it achieved a Faraday efficiency of 93% for the oxidation reaction of poly (ethylene terephthalate) (PET) solution under AM 1.5 G light. As a photocathode, the synthesized Ag NPs@CuO/Cu 2 O NCs was utilized to reduce CO 2 to ethylene and CO at 1.5 V vs . RHE with selectivity of 42% and 55%, respectively. This work shows that the photoelectrocatalysis, as an environmentally friendly technology, is a feasible strategy for reducing the environmental and biological hazards of light plastics, as well as for efficient CO 2 reduction.
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