Article
Engineering, Chemical
Peng Du, Jieyu Song, Xuerui Wang, Yuting Zhang, Jixian Xie, Gang Liu, Yongli Liu, Zhenwei Wang, Zhou Hong, Xuehong Gu
Summary: Efficient hydrogen separation is crucial from the cracked tail gas of ethylene plant. DD3R zeolite membranes were developed for this purpose, showing high selectivity and stability under harsh conditions. The efficient scale-up synthesis method led to the production of high-quality membranes suitable for industrial applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Liang Yu, Iliana Kyriazidou, Ming Zhou, Jonas Hedlund
Summary: This study investigates the application of DDR membranes with a thickness of approximately 700 nm in the separation of CO2 and CH4. The experimental results show that these membranes exhibit the highest CO2 permselectivity and CO2 permeability reported in literature. This is attributed to the defect-free and ultra-thin zeolite film in the membrane as well as the open and highly permeable support. The study also designs membrane processes for upgrading biogas to biomethane, which are characterized by low membrane area, methane slip, and power need.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Eiji Hayakawa, Shuji Himeno
Summary: The use of rapid thermal processing (RTP) successfully produced Al-containing ZSM-58 zeolite membranes with DDR topology, preventing cracks and increasing CO2/CH4 selectivity.
Article
Engineering, Chemical
Xiaoxue Tang, Ye Zhang, Danni Meng, Xue Kong, Lin Kong, Heng'e Qiu, Ning Xu, Wanying Guo, Senlin Yang, Yanfeng Zhang
Summary: This study systematically investigated the effects of various parameters on the gel-less synthesis of SSZ-13 membranes for the first time. The key to successful gel-less synthesis is to create an environment similar to conventional hydrothermal synthesis and maintain a delicate balance between the template solution in the seed layer and at the bottom of the autoclave.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Xiaoxue Tang, Ye Zhang, Danni Meng, Xue Kong, Senlin Yang, Wanying Guo, Heng'e Qiu, Lin Kong, Yanfeng Zhang, Zefang Zhang
Summary: In this study, sub-micron SSZ-13 membranes were successfully prepared using a hot-dipping method, demonstrating outstanding CO2-CH4 mixture separation performance. The method effectively prevented any undesirable changes to the seed layer, which may help in correlating membrane performance with seed layer properties.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Environmental Sciences
Junfei Liu, Hai Lin, Yingbo Dong, Yinhai He, Chenjing Liu
Summary: In this study, MoS2@Z photocatalysts were synthesized using ultrasonic and hydrothermal methods for the degradation of tetracycline. The MoS2@Z-5 exhibited the highest degradation efficiency of tetracycline and showed good stability in multiple cycles. The results suggest that MoS2@Z-5 could be a promising and efficient photocatalyst for tetracycline wastewater treatment.
Article
Engineering, Environmental
Zhonghao Peng, Ze Liu, Yu Gao, Jiayu Liu, Dongmin Wang, Hongying Liu, Yanbo Zhang, Li Li
Summary: This paper investigates the effects of various factors on the synthesis of DDR zeolite using silica fume as raw material, and determines the optimum synthesis condition, which reduces the cost of synthesis and achieves the utilization of waste materials.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Mengya Chen, Wanying Guo, Xue Kong, Xiaoxue Tang, Senlin Yang, Danni Meng, Longfei Zhou, Jialin Ma, Xinrui Du, Yanfeng Zhang
Summary: To bring zeolite membranes to commercial application, the issues of low permeance, poor reproducibility, high manufacturing cost and scale-up need to be addressed. This study achieved facile and efficient preparation of pure silica CHA membrane by using an active silica source, ammonium hexafluorosilicate, in a homogeneous mother liquor. The replacement of conventional imhomogeneous slurry-like mother liquor with a homogeneous mother liquor greatly improved the reproducibility of membrane synthesis and favored the formation of thin membrane. The gel-less synthesis reduced material waste without sacrificing selectivity and permeance, resulting in a facile and reproducible preparation method for thin pure silica CHA membrane with high material efficiency.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Xiaoyan Ji, Yan Bao, Conghui Du, Qiuhui Shi, Wenlong Xu, Zhining Wang
Summary: Researchers have successfully prepared a two-dimensional zeolite membrane with a layered structure and demonstrated its potential application in water treatment. The membrane has good water permeability, high rejection rate, and excellent stability.
Article
Biotechnology & Applied Microbiology
Eleni Kastanaki, Anastasia Rovithi, Eleftheria Iatrou, Antonis Stratakis, Apostolos Giannis
Summary: This study aims to convert calcareous lignite fly ash into synthetic zeolite through hydrothermal, fusion-hydrothermal, and hydrothermal-sonochemical processes. Experiments were conducted using raw and washed fly ash, and the results showed the formation of four types of zeolite crystals. The optimized conditions for maximum zeolite yield were determined, and the use of sonication after the hydrothermal process improved the yield of phillipsite zeolite. The study demonstrates the effective conversion of waste fly ash into valuable products through the hydrothermal-late sonication process.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Environmental Sciences
Peigang He, Qikun Wang, Shuai Fu, Meiling Wang, Shengjian Zhao, Xuzhao Liu, Yuqi Jiang, Dechang Jia, Yu Zhou
Summary: This study demonstrates a facile method to prepare bulk zeolites with tunable phase compositions and microstructures by combining hydrothermal treatment and geopolymer precursor technique. By systematically investigating the effects of hydrothermal conditions, the optimal hydrothermal procedure for specific phase compositions is determined. The resulting zeolites show promising adsorption performance for hazardous elements, with mechanisms of chemisorption and ion exchanges elucidated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Applied
Gabriel B. Bafero, Erica C. O. Munsignatti, Heloise O. Pastore
Summary: The study elucidated the mechanisms involved in the hydrothermal conversion of lamellar silicates into zeolites, showing that MOR phase formation follows a classical reconstructive pathway while Na-P1 and ZSM-34 structures result from a nonclassical recrystallization process. Understanding these synthetic mechanisms is crucial for the intelligent design of new and useful materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Biotechnology & Applied Microbiology
Zhenzhen Wu, Juan Zhong, Yingjie Yu, Mingdeng Rong, Tao Yang
Summary: This study utilized a combination of bioskiving and sonication to rapidly fabricate porous collagen membranes, with the finding that tuning the power intensity of sonication can control fibril orientation in the collagen membranes. The prepared collagen membranes could be further mineralized to enhance osteogenesis.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Ruijian Zhu, Yaning Shen, Xinyi Wu, Jiaqi Liu, Xueru Shi, Yuxing Ding, Yuan Cong, Zengmei Wang, Hideo Kimura, Zhenxiang Cheng
Summary: High quality epitaxial BiFeO3 films were grown on SrTiO3 substrate using hydrothermal and microwave-assisted hydrothermal methods, with enhanced remanent polarization and magnetization. The films exhibited a clear light response and the microwave-assisted hydrothermal grown film showed an open-circuit voltage exceeding the band gap of BiFeO3 due to the ferroelectric photovoltaic effect. These methods provide a simple, inexpensive, and rapid way to grow high quality BiFeO3 films with potential applications in photoelectric detection and photovoltaic.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Chemical
Bin Wang, Weijie Huang, Yancai Zhu, Rongfei Zhou, Weihong Xing
Summary: Ultra-permeable SAPO-34 membranes with uniform thickness were successfully fabricated using diluted mother liquids. The membranes exhibited excellent separation performance and showed potential for large-scale production.
JOURNAL OF MEMBRANE SCIENCE
(2022)