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Xihua Du

Bio: Xihua Du is an academic researcher from Xuzhou Institute of Technology. The author has contributed to research in topics: Materials science & Catalysis. The author has an hindex of 10, co-authored 38 publications receiving 528 citations.

Papers published on a yearly basis

Papers
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Journal ArticleDOI
TL;DR: In this article, a simple and cost-effective one-step hydrothermal method, which was based on the reactions of tin(IV) chloride pentahydrate and different dosages of thioacetamide in water at 190°C for 6h, was employed for the synthesis of composition-tunable SnS 2 /SnO 2 nanoheterojunctions.
Abstract: A simple and cost-effective one-step hydrothermal method, which was based on the reactions of tin(IV) chloride pentahydrate and different dosages of thioacetamide in water at 190 °C for 6 h, was employed for the synthesis of composition-tunable SnS 2 /SnO 2 nanoheterojunctions (e.g., SnS 2 /SnO 2 -A, SnS 2 /SnO 2 -B and SnS 2 /SnO 2 -C). The photocatalytic properties of the as-synthesized SnS 2 /SnO 2 nanoheterojunctions were tested by the reduction of aqueous Cr(VI) under visible-light ( λ > 420 nm) irradiation. Furthermore, the photocatalytic efficiency of SnS 2 /SnO 2 -B was compared with those of PM-SnS 2 /SnO 2 (which denotes the physically mixed SnS 2 /SnO 2 nanocomposite with the same composition as SnS 2 /SnO 2 -B) and SnS 2 nanoflakes at different dosages of photocatalysts. It was observed that (i) the photocatalytic activities of the as-synthesized SnS 2 /SnO 2 nanoheterojunctions depended on their compositions, and SnS 2 /SnO 2 -B with 70 mol% SnS 2 displayed the highest photocatalytic activity; (ii) SnS 2 /SnO 2 -B invariably exhibited higher photocatalytic efficiencies than PM-SnS 2 /SnO 2 and SnS 2 nanoflakes at different dosages of photocatalysts; (iii) the washing with 1 mol/L HNO 3 can effectively regenerate the used photocatalyst; (iv) SnS 2 /SnO 2 -B exhibited good photocatalytic stability in reuses, with regeneration by 1 mol/L HNO 3 -washing after each cycle of photocatalytic use; and (v) Cr(VI) was reduced to Cr(III). The possible formation mechanism of SnS 2 /SnO 2 nanoheterojunctions and the reasons accounting for the photocatalytic results were also discussed.

298 citations

Journal ArticleDOI
Zhao Li1, Ming Song1, Wenyou Zhu1, Wenchang Zhuang1, Xihua Du1, Lin Tian1 
TL;DR: In this paper, a comprehensive overview of compositional and structural properties of hollow heterostructure, which provides a large surface area, void spaces, and multiple interfaces for electrolytes/reactants impregnation, reduced diffusion lengths for mass transport, as well as structural strength for suppressing agglomeration, is presented.

121 citations

Journal ArticleDOI
01 Mar 2019-Carbon
TL;DR: In this article, a novel class of cost-efficient electrocatalysts for oxygen evolution reaction (OER), employing carbon dots (CDs), is reported, benefiting from the successful incorporation of CDs into MnO2 nanoflowers, the resultant CDs-MnO2 with high surface areas, enhanced conductivity, as well as fast charge transfer pathways display not only greatly promoted EC activity but also high stability for OER.

91 citations

Journal ArticleDOI
TL;DR: Although transition metal materials are extensively studied for hydrogen evolution reaction (HER) because of their intrinsic electrochemical properties, their practical applications have been hinde... as mentioned in this paper, their practical application has been hind
Abstract: Although transition metal materials are extensively studied for hydrogen evolution reaction (HER) because of their intrinsic electrochemical properties, their practical applications have been hinde...

36 citations

Journal ArticleDOI
TL;DR: In this article, a simple, effective and environmental-friendly method was adopted for enhancing the photocatalytic activity of g-C 3 N 4 in the reduction of aqueous Cr 6+ under visible-light irradiation.

30 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, a series of Bi2MoO6/ZnO hierarchical heterostructured photocatalysts were synthesized by a solvothermal method and their performance was evaluated with visible-light irradiation.
Abstract: The construction of heterostructures is regarded as an excellent strategy to achieve efficient charge separation and improved photocatalytic activity. Herein, a series of Bi2MoO6/ZnO hierarchical heterostructured photocatalysts were synthesized by a solvothermal method. The morphology of Bi2MoO6 grown on the surface of ZnO nanorods could be controlled by adjusting the experimental conditions. The synthesized samples were characterized by various analytical techniques and their photocatalytic performance was evaluated by photocatalytic reduction of Cr(VI) under visible-light irradiation. Compared with those of pure Bi2MoO6 and ZnO, the Bi2MoO6/ZnO composites showed higher photocatalytic activity towards the reduction of Cr(VI). The enhanced photocatalytic activity was mainly attributed to the formation of a heterojunction between Bi2MoO6 and ZnO, which effectively facilitated the separation and transfer of electrons and holes. In addition, the Bi2MoO6/ZnO photocatalysts maintained good stability after three cycles of Cr(VI) photoreduction. A possible photocatalytic mechanism of the as-synthesized composites was proposed.

317 citations

Journal ArticleDOI
TL;DR: The primary advances of CQDs in the synthetic methods, excellent physical and electronic properties, and application in electrocatalysis, including oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reduction (HER), and CO2 reduction Reaction (CO2RR).
Abstract: Luminescent carbon quantum dots (CQDs) represent a new form of nanocarbon materials which have gained widespread attention in recent years, especially in chemical sensor, bioimaging, nanomedicine, solar cells, light-emitting diode (LED), and electrocatalysis. CQDs can be prepared simply and inexpensively by multiple techniques, such as the arc-discharge method, microwave pyrolysis, hydrothermal method, and electrochemical synthesis. CQDs show excellent physical and chemical properties like high crystallization, good dispersibility, photoluminescence properties. In particular, the small size, superconductivity, and rapid electron transfer of CQDs endow the CQDs-based composite with improved electric conductivity and catalytic activity. Besides, CQDs have abundant functional groups on the surface which could facilitate the preparation of multi-component electrical active catalysts. The interactions inside these multi-component catalysts may further enhance the catalytic performance by promoting charge transfer which plays an important role in electrochemistry. Most recent researches on CQDs have focused on their fluorescence characteristics and photocatalytic properties. This review will summarize the primary advances of CQDs in the synthetic methods, excellent physical and electronic properties, and application in electrocatalysis, including oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reduction (HER), and CO2 reduction reaction (CO2RR).

308 citations

Journal ArticleDOI
TL;DR: In this article, the authors synthesize a composite of Cu2O/BiVO4 nanoparticles for the simultaneous oxidation of organic dyes and reduction of Cr(VI) in neutral media.

284 citations