chemistry

Xie Yi

Xie Yi is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Xie Yi rather than just read about it. In short: Xie Yi FRSC (simplified Chinese: 谢毅; traditional Chinese: 謝毅; pinyin: Xiè Yì; born 23 July 1967) is a Chinese chemist. She is a member of the Chinese Academy of Sciences and a fellow of the Royal Society of Chemistry.

Key takeaways

Xie Yi belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Xie Yi to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Xie Yi from memory before moving on to harder problems.

Reference excerpt

Xie Yi FRSC (simplified Chinese: 谢毅; traditional Chinese: 謝毅; pinyin: Xiè Yì; born 23 July 1967) is a Chinese chemist. She is a member of the Chinese Academy of Sciences and a fellow of the Royal Society of Chemistry. She is a professor and doctoral supervisor at University of Science and Technology of China. Xie won the L'Oréal-UNESCO Awards for Women in Science in March 2015.

Early life and education Xie was born in Fuyang, Anhui on July 23, 1967; her ancestral home is in Anqing, Anhui. She entered Xiamen University in September 1984, majoring in chemistry at the Department of Chemistry, where she graduated in July 1988. After college, she was assigned to a chemical plant in Hefei as an assistant engineer. In September 1992, she was accepted to University of Science and Technology of China, studying chemistry under Qian Yitai, and she earned her doctorate in May 1996. From September 1997 to July 1998, she did postdoctoral work at Stony Brook University.

Research and career Xie became a professor at University of Science and Technology of China since November 1998 and doctoral supervisor since April 1999. In August 2013, she was elected a fellow of the Royal Society of Chemistry. On December 19, 2013, she was elected a fellow of the Chinese Academy of Sciences. Xie together with her lab is pursuing cutting-edge research at four major frontiers: solid-state chemistry, nanotechnology, energy materials, and theoretical physics. In particular, the research focuses on the design and synthesize inorganic functional solids with efforts to modulate their electron and phonon structures, including the following topics:

Characterization of the low-dimensional solids and the relationship study of special electronic structure with their intrinsic properties New approaches to decoupled optimization of thermoelectric properties Important inorganic functional materials responsive to light, magnetism, electricity, and heat, and the control of their intelligent characteristics Flexible nanodevices for high-efficient energy-storage and conversion Nanostructured photocatalysts for CO2 enrichment and conversion

Awards 2014: TWAS Prize 2015: L'Oréal-UNESCO Awards for Women in Science 2016: Asian Scientist 100, Asian Scientist

Selected papers Some of Xie most cited publications are:

Xie, J., Zhang, H., Li, S., Wang, R., Sun, X., Zhou, M., … Xie, Y. (2013). Defect-Rich MoS2 Ultrathin Nanosheets with Additional Active Edge Sites for Enhanced Electrocatalytic Hydrogen Evolution. Advanced Materials, 25(40), 5807–5813. doi:10.1002/adma.201302685. Defect‐rich MoS2 ultrathin nanosheets are synthesized on a gram scale for electrocatalytic hydrogen evolution. The novel defect‐rich structure introduces additional active edge sites into the MoS2 ultrathin nanosheets, which significantly improves their electrocatalytic performance. Low onset overpotential and small Tafel slope, along with large cathodic current density and excellent durability, are all achieved for the novel hydrogen‐evolution‐reaction electrocatalyst. The study employed various spectroscopy and imaging tools such as X-ray photoelectron spectroscopy, Annular dark-field imaging, X-ray crystallography, Field-emission microscopy, High-resolution transmission electron microscopy and Fourier-transform infrared spectroscopy. Yuan, C., Wu, H. B., Xie, Y., & Lou, X. W. (David). (2014). Mixed Transition-Metal Oxides: Design, Synthesis, and Energy-Related Applications. Angewandte Chemie International Edition, 53(6), 1488–1504. doi:10.1002/anie.201303971. A promising family of mixed transition‐metal oxides (MTMOs) (designated as AxB3‐xO4; A, B=Co, Ni, Zn, Mn, Fe, etc.) with stoichiometric or even non‐stoichiometric compositions, typically in a spinel structure, has recently attracted increasing research interest worldwide. Benefiting from their remarkable electrochemical properties, these MTMOs will play significant roles for low‐cost and environmentally friendly energy storage/conversion technologies. In this Review, we summarize recent research advances in the rational design and efficient synthesis of MTMOs with controlled shapes, sizes, compositions, and micro‐/nanostructures, along with their applications as electrode materials for lithium‐ion batteries and electrochemical capacitors, and efficient electrocatalysts for the oxygen reduction reaction in metal–air batteries and fuel cells. Some future trends and prospects to further develop advanced MTMOs for next‐generation electrochemical energy storage/conversion systems are also presented. Zhang, X., Xie, X., Wang, H., Zhang, J., Pan, B., & Xie, Y. (2013). Enhanced Photoresponsive Ultrathin Graphitic-Phase C3N4 Nanosheets for Bioimaging. Journal of the American Chemical Society, 135(1), 18–21. doi:10.1021/ja308249k. Two-dimensional nanosheets have attracted tremendous attention because of their promising practical application and theoretical values. The atomic-thick nanosheets are able to not only enhance the intrinsic properties of their bulk counterparts but also give birth to new promising properties. Herein, we highlight an available pathway to prepare the ultrathin graphitic-phase C3N4 (g-C3N4) nanosheets by a “green” liquid exfoliation route from bulk g-C3N4 in water for the first time. The as-obtained ultrathin g-C3N4 nanosheet solution is very stable in both the acidic and alkaline environment and shows pH-dependent photoluminescence (PL). Compared to the bulk g-C3N4, ultrathin g-C3N4 nanosheets show enhanced intrinsic photoabsorption and photoresponse, which induce their extremely high PL quantum yield up to 19.6%. Thus, benefiting from the inherent blue light PL with high quantum yields and high stability, good biocompatibility, and nontoxicity, the water-soluble ultrathin g-C3N4 nanosheet is a brand-new but promising candidate for bioimaging application. First-principle density-functional (Density functional theory (DFT)) calculations were performed to study the electronic structure of the bulk and single-layered nanosheet of g-C3N4 . Spectroscopy tools such as Transmission electron microscopy and Atomic force microscopy were used for acquiring structural information about the nanosheet. In addition, Ultraviolet–visible spectroscopy was employed for photoluminescence characterization.

Worked examples

Example 1 — a first encounter with Xie Yi

Start with the simplest possible case. Write down what Xie Yi claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Xie Yi before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Xie Yi ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Xie Yi

In research: Xie Yi appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Xie Yi in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Xie Yi is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1967 births, 21st-century Chinese women scientists, Academic staff of the University of Science and Technology of China, so understanding it makes those chapters shorter.
In everyday life: Look for Xie Yi outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Xie Yi” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Xie Yi in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Xie Yi means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Xie Yi out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Xie Yi in simple terms?

Why does Xie Yi matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Xie Yi?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Xie Yi.