Lulu Zhu

Shanghai Jiao Tong University

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Hao Ren

China General Nuclear Power Corporation (China)

Shenmin Zhu

Shanghai Jiao Tong University

Yao Li

Wuhan University of Technology

Jingyi Lin

University of Chinese Academy of Sciences

Qixing Jiang

Shenzhen Institute of Information Technology

Qian Su

Weifang University

Na Ni

Binzhou University

Fang Yang

State Key Laboratory of Food Science and Technology

Huaqiang Wu

Tsinghua University

Runlu Liu

Shanghai Jiao Tong University

Cooperative Institutions

Shanghai Jiao Tong University

Nanjing Forestry University

Jiangnan University

State Key Laboratory of Food Science and Technology

Anhui Agricultural University

Tsinghua University

Chinese Academy of Sciences

Qilu University of Technology

Huazhong University of Science and Technology

Nanjing University

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Construction of a Bioinspired Hierarchical BiVO₄/BiOCl Heterojunction and Its Enhanced Photocatalytic Activity for Phenol Degradation

ACS Applied Materials & Interfaces (2021)

Qian Su Lulu Zhu Mingrui Zhang Yao Li Siyuan Liu

Development of a p–n heterojunction to achieve efficient degradation of organic pollutants is a promising approach in the field of photocatalysis. Herein, BiVO4 with bioinspired hierarchical structures was prepared with the sol–gel method and combined with BiOCl nanoplates to construct a 3D/2D configuration via an in situ deposition route. The hierarchical BiVO4 served as an excellent substrate to achieve the uniform loading of BiOCl nanoplates. The obtained 3D/2D BiVO4/BiOCl hybrids exhibited significantly enhanced photocatalytic efficiency for degrading phenol under visible light irradiation, with a first-order reaction rate constant that was 9.9 and 1.9 times higher than those of hierarchical BiVO4 and the BiVO4/BiOCl hybrids without hierarchical structures, respectively. Moreover, the hierarchical BiVO4/BiOCl also displayed good photochemical stability for the degradation of phenol after three recycles. The p–n heterojunction and hierarchical structure worked together to form a spatial conductive network framework, which possessed improved visible light absorption, high specific surface area, as well as effective separation and transfer of photogenerated charge carriers.

Degradation

Visible spectrum

10.1021/acsami.1c05117

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Citations (88)

Microwave-assisted synthesis of Zn x Cd1−x S–MWCNT heterostructures and their photocatalytic properties

Journal of Nanoparticle Research (2010)

Huaqiang Wu Youzhi Yao Wenting Li Lulu Zhu Na Ni

Wurtzite crystal structure

Photodegradation

Nanorod

10.1007/s11051-010-9981-7

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Citations (21)

Fenton Reaction Doubled Biomass Carbon Activation Efficiency for High‐Performance Supercapacitors

Advanced Functional Materials (2024)

Yanyu Li Lifeng Ni Jiayan Luo Lulu Zhu Xiaoxiao Zhang

Abstract The huge consumption of alkali during biomass‐derived porous carbon production leads to pollution and high carbon‐emission. This study employs the concept of Fenton chemistry to achieve hierarchical porous biomass carbon materials with a remarkably high specific surface area of 3440 m 2 g −1 with double activation efficiency compared to traditional activation process. The optimized carbon electrode demonstrates exceptional specific capacitance of 425.2 F g −1 at a current density of 0.1 A g −1 and great rate performance (286.1 F g −1 at 100 A g −1 ) in 6 m KOH electrolyte. The enabled supercapacitor demonstrates remarkable cycling stability, retaining up to 99.74% of its initial capacitance after undergoing 20 000 charge–discharge cycles. In addition, the electrolyte ion distribution in different pore structures is simulated using Molecular Dynamics, which confirms that the structure is conducive to the rapid diffusion of ions, thus matching the excellent electrochemical properties. The assembled symmetric supercapacitors achieve a maximum energy density of 42.1 Wh kg −1 (12.1 Wh kg −1 based on cell stack mass) in TEABF 4 /AN electrolyte. This work presents an effective technique for the formation of porous structures from biomass precursors. The novel methodology can be applied to many other similar systems for energy storage and beyond.

Carbon fibers

Power density

Specific energy

10.1002/adfm.202403448

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Citations (48)

Structural analysis of poplar and Masson pine lignocresols and comparison of their bovine serum albumin adsorption characteristics

TAPPI Journal (2019)

Lulu Zhu Feng Zhang Dongliang Xu Guigan Fang Hao Ren

In this study, poplar and Masson pine trees were used as raw materials to examine the structural characteristics of lignin that had been isolated with a phase separation system. Following phase separation, the structure of lignocresol (LC) was characterized with Fourier transform infrared (FTIR) spectroscopy, high-performance gel permeation chromatography (GPC), proton nuclear magnetic resonance (1H-NMR) spectroscopy, and two-dimensional heteronuclear single quantum coherence nuclear magnetic resonance (2D HSQC NMR) spectroscopy. Phase separation made it possible to analyze the proportions and the differences between various structural units in the isolated lignin, as well as the types of linkages between them. In-situ and real-time monitoring of the adsorption and desorption properties of the LC membranes were conducted with a bovine serum albumin (BSA) assay and a quartz crystal microbalance (QCM-D). Our findings revealed that the LC membrane of Masson pine adsorbed more BSA than that of poplar, indicating Masson pine LC molecules were more hydrophobic due to a higher proportion of guaiacyl (G)-type lignin units.

Quartz Crystal Microbalance

Bovine serum albumin

Gel permeation chromatography

10.32964/tj18.1.31

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Citations (3)

Effects of lignin content and acid concentration on the preparation of lignin containing nanofibers from alkaline hydrogen peroxide mechanical pulp

Nordic Pulp & Paper Research Journal (2020)

Lulu Zhu Shiwen Xue Hao Ren Jin Zhao Huimin Zhai

Abstract The poplar alkaline hydrogen peroxide mechanical pulp (APMP) with the lignin content of 24.63 % was used as raw material, which with lignin content of 10.04 %, 6.33 %, 3.82 %, and 1.14 % were obtained by the acid sodium chlorite method for 1–4 hours respectively. Then, different lignin content APMP were micro-nano processing treated with acidolysis (6.5 M, 9.8 M) or ultra-granular grinding respectively. Afterwards, poplar bleached chemical pulp (BCP) was prepared micro-nano cellulose under the same conditions as the APMP. Then, compared the data of the particle size, specific surface area, fiber morphology and zeta potential of suspensions between micro-nano cellulose products. The results show that the presence of a small amount of lignin (1–4 %) in APMP does not affect the preparation of different scales nano cellulose under different acid concentration conditions. When the lignin content is reduced to below 2 %, the acidolysis is more uniform, stable, and well-dispersed compared to BCP products; when the APMP is processed by the ultra-granular grinding, the higher lignin content, the more obvious cutting effect in the fiber length direction. The characteristics and feasibility of the preparation of micro-nano cellulose by the acidolysis and ultra-granular grinding using APMP with varying degrees of delignification are compared.

10.1515/npprj-2020-0066

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Citations (2)

Comparison of the structural characterization of lignophenols and alkaline lignins before and after methylolation

Wood Science and Technology (2018)

Hao Ren Lulu Zhu

Gel permeation chromatography

Dispersity

10.1007/s00226-018-1010-5

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Citations (11)

Enhancing Photocatalytic Degradation via the Synergetic Effect of Vacancies and Built-In Potential in a BiOCl/BiVO₄ p–n Heterojunction

ACS Applied Materials & Interfaces (2023)

Lulu Zhu Baiyu Zhang Qian Su Runlu Liu Jingyi Lin

Photoinduced charge separation and surface reactions are essential for ensuring high quantum efficiency of the photochemical and photophysical processes. BiVO4-based heterojunctions are promising materials for high-performance photocatalysts; however, their photocatalytic performance is significantly lower than the theoretical limit due to the sluggish water oxidation dynamics and rapid recombination of charge carriers on the catalyst surface. To address these issues, oxygen vacancies (OVs) are introduced to a rationally designed BiVO4-based heterojunction using built-in potential and gradient OVs to promote the separation of carriers and increase the photocatalytic activity. The heterojunctions with OVs exhibit a 2-fold increase in the photocatalytic activity for phenol degradation compared with that of pristine BiVO4. Additionally, density functional theory is applied to elucidate the synergistic mechanism of light absorption and charge separation in BiOCl/BiVO4 p-n heterojunction photocatalysts containing vacancies. The obtained results demonstrate a synergistic effect of vacancies and the built-in potential, providing a pathway for defect engineering in photocatalytic processes.

Degradation

Charge carrier

Visible spectrum

10.1021/acsami.3c07141

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Citations (10)

Improvement of the physical properties of paper sheet-lignophenol composites prepared using a facile impregnation technique

BioResources (2017)

Lulu Zhu Hanqing Liu Shuang Qian Hongqi Dai Hao Ren

Lignophenol was separated from bamboo (Sinocalamus affinis) using a phase separation system. Different concentrations of a lignophenol-acetone solution were used to impregnate hardwood pulp fiber sheets (80 g/m2). The results showed that the tightness, tensile index, tear index, and burst index properties of sheets impregnated with a lignophenol acetone solution (80 g/L) increased 5.66%, 160.08%, 93.66%, and 140%, respectively, compared with sheets prepared without lignophenol. The lignophenol-hardwood pulp fiber composites were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, and total reflectance Fourier transform infrared spectroscopy. The results indicated that lignophenol uniformly adhered to the pulp fibers but no chemical bonding occurred. Additionally, both virgin and recycled softwood pulp fiber sheets (80 g/m2) were tested using the same method. Although the strength of all composites increased after impregnation, the most obvious improvement was observed in the hardwood pulp-based composite. This simple method improved the physical strength and hydrophobicity of the composite sheets.

Softwood

Tear resistance

10.15376/biores.12.4.8058-8067

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Citations (1)

Preparation of high oil absorption microfiber cryogels by mechanical method

Wood Science and Technology (2020)

Haonan Zhang Lulu Zhu Shiwen Xue Jin Zhao Hao Ren

Microfiber

10.1007/s00226-020-01218-w

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Citations (4)