ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jing Wu,Tingting Zhang,Jin Qu,Fan-Zhen Jiao,Chen Hu,Hao-Yu Zhao,Xiaofeng Li,Zhong-Zhen Yu
Although the emerging interfacial solar steam generation technology is sustainable and eco-friendly for generating clean water by desalinating seawater and purifying wastewaters, salt deposition on the evaporation surface during solar-driven evaporation severely degrades the purification performances and adversely affect the long-term performance stability of solar steam generation devices. Herein, to construct solar steam generators for efficient solar steam generation and seawater desalination, three-dimensional (3D) natural loofah sponges with both macropores of the sponge and microchannels of the loofah fibers are hydrothermally decorated with molybdenum disulfide (MoS2) sheets and carbon particles. Benefiting from fast upward transport of water, rapid steam extraction, and effective salt-resistant capacity, the 3D hydrothermally decorated loofah sponge with MoS2 sheets and carbon particles (HLMC) with an exposed height of 4 cm can not only obtain heat by its top surface under the downward solar light irradiation based on the solar–thermal energy conversion but also gain environmental energy by its porous sidewall surface, achieving a competitive water evaporation rate of 3.45 kg m–2 h–1 under 1 sun irradiation. Additionally, the 3D HLMC evaporator exhibits long-term desalination stability during the solar-driven desalination of an aqueous salt solution with 3.5 wt % NaCl for 120 h without apparent salt deposition because of its dual type of pores and uneven structure distribution.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 27
·12670-12677
·
IF 3.3
Weiwen Cao,Xuanyu Yang,Weiji Dai,Bing Wu,Yudong Zhang,Cuijiao Zhao,Yanwei Sui,Saifang Huang
Efficient and robust electrocatalysts towards the oxygen evolution reaction (OER) are highly desirable in electrochemical systems for applications including water splitting and metal-air batteries. Herein, we report the preparation of an amorphous FeCoNiMnCr high-entropy alloy (HEA) on the surface of flower-like 2H-MoS2 (FeCoNiMnCr@MoS2) as a highly efficient electrocatalyst for the OER. The flower-like 2H-MoS2 is prepared on the flexible conductive carbon cloth (MoS2-CC) via a hydrothermal method, and subsequently the amorphous FeCoNiMnCr HEA is loaded on the surface of 2H-MoS2via an electrodeposition method to form FeCoNiMnCr@MoS2-CC electrocatalysts. Owing to the unique microstructure of 2H-MoS2 and abundant active sites of FeCoNiMnCr HEA, the FeCoNiMnCr@MoS2-CC electrocatalysts exhibit significantly improved OER electrocatalytic performances with a low overpotential of 210 mV at a current density of 10 mA cm−2 and a small Tafel slope of 40.3 mV dec−1 in 1.0 M KOH solution. Moreover, it shows excellent stability for OER electrocatalysis with the potential barely increased for at least 50 h. This work sheds light on the development of highly efficient OER electrocatalysts based on HEAs.
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高影响因子
Small
·
2023
·Vol. 19
·期 37
·2300841
·
IF 13.3
Yuhan Wang,Jin Wang,Meng Zhang,Song Zheng,Jiahui Wu,Tianren Zheng,Guocan Jiang,Zhengquan Li
Perovskite nanocrystals (PNCs) are promising candidates for solar-to-fuel conversions yet exhibit low photocatalytic activities mainly due to serious recombination of photogenerated charge carriers. Constructing heterojunction is regarded as an effective method to promote the separation of charge carriers in PNCs. However, the low interfacial quality and non-directional charge transfer in heterojunction lead to low charge transfer efficiency. Herein, a CsPbBr 3 –CdZnS heterojunction is designed and prepared via an in situ hot-injection method for photocatalytic CO 2 reduction. It is found that the high-quality interface in heterojunction and anisotropic charge transfer of CdZnS nanorods (NRs) enable efficient spatial separation of charge carriers in CsPbBr 3 –CdZnS heterojunction. The CsPbBr 3 –CdZnS heterojunction achieves a higher CO yield (55.8 µmol g −1 h −1 ) than that of the pristine CsPbBr 3 NCs (13.9 µmol g −1 h −1 ). Furthermore, spectroscopic experiments and density functional theory (DFT) simulations further confirm that the suppressed recombination of charge carriers and lowered energy barrier for CO 2 reduction contribute to the improved photocatalytic activity of the CsPbBr 3 –CdZnS heterojunction. This work demonstrates a valid method to construct high-quality heterojunction with directional charge transfer for photocatalytic CO 2 reduction. This study is expected to pave a new avenue to design perovskite–chalcogenide heterojunction.
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高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Qin Lei,Jiaxin Li,Junjie Lei,Bo Hong,Xiaoling Li,He Li,Yiwen Wan
In this study, a simple wet chemical method was used to prepare p-n heterojunction photoelectric composites (Bi 2 S 3 @g-C 3 N 4 ). The p-n junctions were formed to facilitate charge transfer as well as strongly suppress electron-hole pair recombination, thus enhancing the photoelectrochemical (PEC) characteristics. Particularly, according to the transient surface photocurrent response, the photocurrent intensity of the prepared composites was 2.98 times higher relative to the pristine g-C 3 N 4 material. The photocurrent signal revealed the prepared novel PEC sensor composed of Bi 2 S 3 @g-C 3 N 4 composite material, which can be used for sensitively and selectively detecting chlorpyrifos. This method presented a linear change from 50 ng/mL to 0.1 mg/mL of chlorpyrifos under the optimal conditions. The linear regression equation was I(μA)=0.8546-0.1558lgC(mg/mL) (R 2 =0.9758) and the detection limit was 0.03 ng/mL (S/N=3). In addition, the novel sensing platform with high selectivity could assist in rapidly and effectively detecting chlorpyrifos in environmental analysis.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 21
·11161-11169
·
IF 11.9
Qian Xiao,Dongxing Kou,Wenhui Zhou,Zhengji Zhou,Shengjie Yuan,Yafang Qi,Yuena Meng,Litao Han,Zhi Zheng,Sixin Wu
Advances in the development of kesterite Cu2ZnSn(S,Se)4 (CZTSSe) solar cells are urgently needed to further exploit their high-efficiency and low-cost nature. However, almost all the CZTSSe photovoltaics are presently fabricated using physically sputter-deposited i-ZnO as a window layer, which often results in self-doping with detrimental oxygen vacancies (VO) and zinc interstitial (Zni) defects, leading to ineffective charge collection and enlarged interface recombination losses. Herein, a solution-processed ZnO:Li nanoparticle (NP) window layer is demonstrated via the construction of a high-quality ZnO:Li/CdS/CZTSSe heterojunction to enhance the charge collection and minimize the interface recombination. The interstitial Li doping at a certain content significantly enhances the electrical conductivity of ZnO and quasi-Fermi level splitting at the p–n junction interface and reduces the concentration of VO and Zni defects. These electric benefits finally improve the conversion efficiency from 11.31% up to 12.60% with significant gains in FF and Voc. Our findings suggest that developing a ZnO:Li NP window layer is an effective method to manage electrical conductivity, contact resistance and interface band offset at the p–n junction, boosting the development of high-efficiency and low-cost kesterite solar cells to a higher level.
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高影响因子
LANGMUIR
·
2023
·
IF 3.9
Ranran Guo,Zhaozhao Yang,Xiaosen Pan,Xiaojun Ma,Yujuan Qiu,Jie Li
Carbon-based supercapacitors with high performance have a wide foreground among various energy storage devices. In this work, wood-based hollow carbon spheres (WHCS) were prepared from liquefied wood through the processes of emulsification, curing, carbonization, and activation. Then, the hydrodeposition method was used to introduce nickel sulfide (NiS) to the surface of the microspheres, obtaining NiS/WHCS as the supercapacitor electrode. The results show that NiS/WHCS microspheres exhibited a core–shell structure and flower-like morphology with a specific surface (307.55 m2 g–1) and a large total pore volume (0.14 cm3 g–1). Also, the capacitance could be up to 1533.6 F g–1 at a current density of 1 A g–1. In addition, after 1000 charge/discharge cycles, the specific capacitance remained at 72.8% at the initial current density of 5 A g–1. Hence, NiS/WHCS with excellent durability and high specific capacitance is a potential candidate for electrode materials.
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高影响因子
ACS ES&T Water
·
2023
·
IF 5.3
Lijuan Wang,Jiawei Li,Gansheng Zhong,Jiangpeng Li,Xiao Lu,Siqing Wang,Yuanyuan Tang
To face the current critical challenges of gold recovery and beneficial utilization of solid waste, this study synthesized diatom biochar from the anoxic pyrolysis of diatoms and proved the superiority of the diatom biochar as a novel adsorbent for Au(III) in both synthetic and real electroplating wastewaters. The diatom biochar was found to have a high adsorption capacity of 443.0 mg/g and a superior recovery efficiency of up to 92.1%. The Au(III) adsorption kinetics followed the pseudo-second-order and intraparticle diffusion models. Electrostatic attraction and reduction were detected as the major adsorption mechanisms. An exceptional selectivity was also observed for the diatom biochar toward Au(III) with other coexisting heavy metals. Even in the presence of CN– in the solution, the diatom biochar still exhibited superiority in Au(III) adsorption. Owing to its high affinity to Au(III), the diatom biochar was successfully applied in real electroplating wastewater containing trace Au(III), with an adsorption efficiency as high as 96.7%. These findings sufficiently demonstrate the excellent performance and economic feasibility of diatoms for Au(III) recovery from electroplating wastewater, which also promoted solid waste minimization of diatom biorefineries.
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高影响因子
Biosensors-Basel
·
2023
·Vol. 13
·期 5
·506
·
IF 5.4
Yaofei Chen,Xin Xiong,Yu Chen,Lei Chen,Guishi Liu,Wei Xiao,Jifu Shi,Zhe Chen,Yunhan Luo
Surface plasmon resonance (SPR) based sensors play an important role in the biological and medical fields, and improving the sensitivity is a goal that has always been pursued. In this paper, a sensitivity enhancement scheme jointly employing MoS2nanoflower (MNF) and nanodiamond (ND) to co-engineer the plasmonic surface was proposed and demonstrated. The scheme could be easily implemented via physically depositing MNF and ND overlayers on the gold surface of an SPR chip, and the overlayer could be flexibly adjusted by controlling the deposition times, thus approaching the optimal performance. The bulk RI sensitivity was enhanced from 9682 to 12,219 nm/RIU under the optimal condition that successively deposited MNF and ND 1 and 2 times. The proposed scheme was proved in an IgG immunoassay, where the sensitivity was twice enhanced compared to the traditional bare gold surface. Characterization and simulation results revealed that the improvement arose from the enhanced sensing field and increased antibody loading via the deposited MNF and ND overlayer. At the same time, the versatile surface property of NDs allowed a specifically-functionalized sensor using the standard method compatible with a gold surface. Besides, the application for pseudorabies virus detection in serum solution was also demonstrated.Keywords:SPR-based biosensor;MoS2nanoflowers;Nanodiamonds;surface engineering;sensitivity enhancement
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高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Wenrui Cao,Zuoli He,Meng Dai,Guangzhao Wang,Guohe Huang,Shuguang Wang
The consumption of sacrificial agents is inevitable to improve the separation and utilization of electron–hole pairs in photocatalytic H2 evolution, which is contrary to the current vision of carbon neutrality and carbon peak. Here, bimetallic sulfides composed of highly dispersed Cu-doped ZnS composites were proposed, exhibiting an optimal H2 evolution activity of over 1569 μmol/g at 2 h (0.5 g/L catalyst) under visible light irradiation at pH = 3 with zero sacrificial agents or cocatalyst consumption, which is approximately 21 times higher than that of pure ZnS. A series of advanced characterizations indicate that the Cu atoms have been doped into the ZnS lattices, exposing a CuS (101) facet on the surface of the ZnS (111) facet. This results in a narrower energy bandgap (Eg = 2.6 eV) in optimal bimetallic sulfides (ZCS0.1), which is beneficial for absorbing more visible light. In particular, the introduction of Cu induces a nonequilibrium charge distribution on the ZCS0.1 surface, thereby boosting the separation and migration of photoinduced carriers. According to theory calculation (DFT) results, the hydrogen adsorption free energy (ΔGH) of ZCS0.1 is reduced than that of pure ZnS, facilitating the efficient reduction of H+/H2O around the electron accumulation regions and oxidation of H2O around the photogenerated hole (h+) regions. The modulation of the surface electronic structure is significant for effectively separating and utilizing photoinduced carriers under natural conditions without the consumption of sacrificial agents.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Wujian Zhang,Zhiling Huang,Lianyang Zhang,Yue Meng,Zheming Ni,Haodong Tang,Shengjie Xia
Defect (vacancy) engineering can modulate the catalyst surface atoms and electrons, which is a low-cost and effective modification strategy for Z-scheme heterojunction . In this paper, metal and non-metal double vacancies (V Zn+O ) Z-scheme heterojunction photocatalysts (BiOCl/ZnS−V Zn+O ) were synthesized for the degradation of norfloxacin (NOR) for the first time. The results show that the built-in electric field of BiOCl/ZnS−V Zn+O catalyst induces the directional migration of photogenerated carriers, which greatly improves the carrier migration and separation efficiency. The introduced nonmetallic (O) vacancies can lower the conduction band of BiOCl, while the metallic (Zn) vacancies can enhance the valence band of ZnS. Due to the synergistic efficiency formed by the double vacancies and Z-scheme heterojunction, BiOCl/ZnS−V Zn+O showed excellent performance in photodegradation of NOR (97.9% degradation rate of 20 mg/L NOR in 50 min photodegradation). In addition, the mechanism of action, intermediates and degradation pathways of photodegradation were discussed in detail.
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高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Zesheng Deng,Jiazhen Cao,Songchang Hu,Shiqun Wu,Mingyang Xing,Jinlong Zhang
CO2 photoreduction is considered one of the potential ways to achieve carbon neutralization since it uses green solar energy without introducing additional carbon sources during the process of converting CO2 to fuels. However, limited light utilization and poor charge separation often give rise to undesirable CO2 photoreduction performance. Herein, a generic approach using carbon spheres as templates to construct transition metal oxides with multishelled hollow structures is reported. The multishelled hollow structure has been proven to be efficient for improving CO2 photoreduction. Furthermore, we constructed a Z-scheme heterojunction photocatalyst (CdS/Au/ZnCrO4) through introducing CdS into a multishelled hollow ZnCrO4 sphere with Au nanoparticles as a charge transfer medium. Benefiting from the multishelled hollow structure’s induced light utilization and large surface area and Z-scheme heterojuncion promoted charge separation, a high CO production of 2.95 μmol g–1 h–1 was achieved on CdS/Au/ZnCrO4 without using any sacrificial agents, which was 18.4 times and 24.6 times higher than that of CdS and ZnCrO4. This work provides a generic method for constructing controllable multishelled hollow spheres and is expected to offer guidance for promoting CO2 photoreduction through structure regulation and heterojunction construction.
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高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Qingdong Liao,Zhen Liu
Hexagonal tungsten oxide films were directly synthesized on fluorine-doped tin dioxide (FTO) coated glasses by the solvothermal method. The tungsten oxide films prepared by using glutaric acid as a self-crystallizing seeding agent and thiourea as a structural guide have a porous morphology with interwoven nanowires. The as-prepared films show excellent electrochromic performance in 1 M sulfuric acid, including 53 % optical modulation at 633 nm by applying ± 0.3 V, fast switching speed of 5 s for coloring and 2 s for bleaching, and high coloring efficiency of 144 C −1 cm 2 .
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危险品化学品经营许可证（带存储）